1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2004 Tim J. Robbins 5 * Copyright (c) 2002 Doug Rabson 6 * Copyright (c) 2000 Marcel Moolenaar 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer 14 * in this position and unchanged. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "opt_compat.h" 37 38 #include <sys/param.h> 39 #include <sys/capsicum.h> 40 #include <sys/clock.h> 41 #include <sys/fcntl.h> 42 #include <sys/file.h> 43 #include <sys/imgact.h> 44 #include <sys/kernel.h> 45 #include <sys/limits.h> 46 #include <sys/lock.h> 47 #include <sys/malloc.h> 48 #include <sys/mman.h> 49 #include <sys/mutex.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/resource.h> 53 #include <sys/resourcevar.h> 54 #include <sys/syscallsubr.h> 55 #include <sys/sysproto.h> 56 #include <sys/systm.h> 57 #include <sys/unistd.h> 58 #include <sys/wait.h> 59 60 #include <machine/frame.h> 61 #include <machine/md_var.h> 62 #include <machine/pcb.h> 63 #include <machine/psl.h> 64 #include <machine/segments.h> 65 #include <machine/specialreg.h> 66 #include <x86/ifunc.h> 67 68 #include <vm/pmap.h> 69 #include <vm/vm.h> 70 #include <vm/vm_map.h> 71 72 #include <security/audit/audit.h> 73 74 #include <compat/freebsd32/freebsd32_util.h> 75 #include <amd64/linux32/linux.h> 76 #include <amd64/linux32/linux32_proto.h> 77 #include <compat/linux/linux_emul.h> 78 #include <compat/linux/linux_ipc.h> 79 #include <compat/linux/linux_misc.h> 80 #include <compat/linux/linux_mmap.h> 81 #include <compat/linux/linux_signal.h> 82 #include <compat/linux/linux_util.h> 83 84 static void bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru); 85 86 struct l_old_select_argv { 87 l_int nfds; 88 l_uintptr_t readfds; 89 l_uintptr_t writefds; 90 l_uintptr_t exceptfds; 91 l_uintptr_t timeout; 92 } __packed; 93 94 static void 95 bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru) 96 { 97 98 lru->ru_utime.tv_sec = ru->ru_utime.tv_sec; 99 lru->ru_utime.tv_usec = ru->ru_utime.tv_usec; 100 lru->ru_stime.tv_sec = ru->ru_stime.tv_sec; 101 lru->ru_stime.tv_usec = ru->ru_stime.tv_usec; 102 lru->ru_maxrss = ru->ru_maxrss; 103 lru->ru_ixrss = ru->ru_ixrss; 104 lru->ru_idrss = ru->ru_idrss; 105 lru->ru_isrss = ru->ru_isrss; 106 lru->ru_minflt = ru->ru_minflt; 107 lru->ru_majflt = ru->ru_majflt; 108 lru->ru_nswap = ru->ru_nswap; 109 lru->ru_inblock = ru->ru_inblock; 110 lru->ru_oublock = ru->ru_oublock; 111 lru->ru_msgsnd = ru->ru_msgsnd; 112 lru->ru_msgrcv = ru->ru_msgrcv; 113 lru->ru_nsignals = ru->ru_nsignals; 114 lru->ru_nvcsw = ru->ru_nvcsw; 115 lru->ru_nivcsw = ru->ru_nivcsw; 116 } 117 118 int 119 linux_copyout_rusage(struct rusage *ru, void *uaddr) 120 { 121 struct l_rusage lru; 122 123 bsd_to_linux_rusage(ru, &lru); 124 125 return (copyout(&lru, uaddr, sizeof(struct l_rusage))); 126 } 127 128 int 129 linux_execve(struct thread *td, struct linux_execve_args *args) 130 { 131 struct image_args eargs; 132 char *path; 133 int error; 134 135 LCONVPATHEXIST(td, args->path, &path); 136 137 error = freebsd32_exec_copyin_args(&eargs, path, UIO_SYSSPACE, 138 args->argp, args->envp); 139 free(path, M_TEMP); 140 if (error == 0) 141 error = linux_common_execve(td, &eargs); 142 AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td); 143 return (error); 144 } 145 146 CTASSERT(sizeof(struct l_iovec32) == 8); 147 148 int 149 linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt, struct uio **uiop) 150 { 151 struct l_iovec32 iov32; 152 struct iovec *iov; 153 struct uio *uio; 154 uint32_t iovlen; 155 int error, i; 156 157 *uiop = NULL; 158 if (iovcnt > UIO_MAXIOV) 159 return (EINVAL); 160 iovlen = iovcnt * sizeof(struct iovec); 161 uio = malloc(iovlen + sizeof(*uio), M_IOV, M_WAITOK); 162 iov = (struct iovec *)(uio + 1); 163 for (i = 0; i < iovcnt; i++) { 164 error = copyin(&iovp[i], &iov32, sizeof(struct l_iovec32)); 165 if (error) { 166 free(uio, M_IOV); 167 return (error); 168 } 169 iov[i].iov_base = PTRIN(iov32.iov_base); 170 iov[i].iov_len = iov32.iov_len; 171 } 172 uio->uio_iov = iov; 173 uio->uio_iovcnt = iovcnt; 174 uio->uio_segflg = UIO_USERSPACE; 175 uio->uio_offset = -1; 176 uio->uio_resid = 0; 177 for (i = 0; i < iovcnt; i++) { 178 if (iov->iov_len > INT_MAX - uio->uio_resid) { 179 free(uio, M_IOV); 180 return (EINVAL); 181 } 182 uio->uio_resid += iov->iov_len; 183 iov++; 184 } 185 *uiop = uio; 186 return (0); 187 } 188 189 int 190 linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt, struct iovec **iovp, 191 int error) 192 { 193 struct l_iovec32 iov32; 194 struct iovec *iov; 195 uint32_t iovlen; 196 int i; 197 198 *iovp = NULL; 199 if (iovcnt > UIO_MAXIOV) 200 return (error); 201 iovlen = iovcnt * sizeof(struct iovec); 202 iov = malloc(iovlen, M_IOV, M_WAITOK); 203 for (i = 0; i < iovcnt; i++) { 204 error = copyin(&iovp32[i], &iov32, sizeof(struct l_iovec32)); 205 if (error) { 206 free(iov, M_IOV); 207 return (error); 208 } 209 iov[i].iov_base = PTRIN(iov32.iov_base); 210 iov[i].iov_len = iov32.iov_len; 211 } 212 *iovp = iov; 213 return(0); 214 215 } 216 217 int 218 linux_readv(struct thread *td, struct linux_readv_args *uap) 219 { 220 struct uio *auio; 221 int error; 222 223 error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio); 224 if (error) 225 return (error); 226 error = kern_readv(td, uap->fd, auio); 227 free(auio, M_IOV); 228 return (error); 229 } 230 231 int 232 linux_writev(struct thread *td, struct linux_writev_args *uap) 233 { 234 struct uio *auio; 235 int error; 236 237 error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio); 238 if (error) 239 return (error); 240 error = kern_writev(td, uap->fd, auio); 241 free(auio, M_IOV); 242 return (error); 243 } 244 245 struct l_ipc_kludge { 246 l_uintptr_t msgp; 247 l_long msgtyp; 248 } __packed; 249 250 int 251 linux_ipc(struct thread *td, struct linux_ipc_args *args) 252 { 253 254 switch (args->what & 0xFFFF) { 255 case LINUX_SEMOP: { 256 struct linux_semop_args a; 257 258 a.semid = args->arg1; 259 a.tsops = PTRIN(args->ptr); 260 a.nsops = args->arg2; 261 return (linux_semop(td, &a)); 262 } 263 case LINUX_SEMGET: { 264 struct linux_semget_args a; 265 266 a.key = args->arg1; 267 a.nsems = args->arg2; 268 a.semflg = args->arg3; 269 return (linux_semget(td, &a)); 270 } 271 case LINUX_SEMCTL: { 272 struct linux_semctl_args a; 273 int error; 274 275 a.semid = args->arg1; 276 a.semnum = args->arg2; 277 a.cmd = args->arg3; 278 error = copyin(PTRIN(args->ptr), &a.arg, sizeof(a.arg)); 279 if (error) 280 return (error); 281 return (linux_semctl(td, &a)); 282 } 283 case LINUX_MSGSND: { 284 struct linux_msgsnd_args a; 285 286 a.msqid = args->arg1; 287 a.msgp = PTRIN(args->ptr); 288 a.msgsz = args->arg2; 289 a.msgflg = args->arg3; 290 return (linux_msgsnd(td, &a)); 291 } 292 case LINUX_MSGRCV: { 293 struct linux_msgrcv_args a; 294 295 a.msqid = args->arg1; 296 a.msgsz = args->arg2; 297 a.msgflg = args->arg3; 298 if ((args->what >> 16) == 0) { 299 struct l_ipc_kludge tmp; 300 int error; 301 302 if (args->ptr == 0) 303 return (EINVAL); 304 error = copyin(PTRIN(args->ptr), &tmp, sizeof(tmp)); 305 if (error) 306 return (error); 307 a.msgp = PTRIN(tmp.msgp); 308 a.msgtyp = tmp.msgtyp; 309 } else { 310 a.msgp = PTRIN(args->ptr); 311 a.msgtyp = args->arg5; 312 } 313 return (linux_msgrcv(td, &a)); 314 } 315 case LINUX_MSGGET: { 316 struct linux_msgget_args a; 317 318 a.key = args->arg1; 319 a.msgflg = args->arg2; 320 return (linux_msgget(td, &a)); 321 } 322 case LINUX_MSGCTL: { 323 struct linux_msgctl_args a; 324 325 a.msqid = args->arg1; 326 a.cmd = args->arg2; 327 a.buf = PTRIN(args->ptr); 328 return (linux_msgctl(td, &a)); 329 } 330 case LINUX_SHMAT: { 331 struct linux_shmat_args a; 332 l_uintptr_t addr; 333 int error; 334 335 a.shmid = args->arg1; 336 a.shmaddr = PTRIN(args->ptr); 337 a.shmflg = args->arg2; 338 error = linux_shmat(td, &a); 339 if (error != 0) 340 return (error); 341 addr = td->td_retval[0]; 342 error = copyout(&addr, PTRIN(args->arg3), sizeof(addr)); 343 td->td_retval[0] = 0; 344 return (error); 345 } 346 case LINUX_SHMDT: { 347 struct linux_shmdt_args a; 348 349 a.shmaddr = PTRIN(args->ptr); 350 return (linux_shmdt(td, &a)); 351 } 352 case LINUX_SHMGET: { 353 struct linux_shmget_args a; 354 355 a.key = args->arg1; 356 a.size = args->arg2; 357 a.shmflg = args->arg3; 358 return (linux_shmget(td, &a)); 359 } 360 case LINUX_SHMCTL: { 361 struct linux_shmctl_args a; 362 363 a.shmid = args->arg1; 364 a.cmd = args->arg2; 365 a.buf = PTRIN(args->ptr); 366 return (linux_shmctl(td, &a)); 367 } 368 default: 369 break; 370 } 371 372 return (EINVAL); 373 } 374 375 int 376 linux_old_select(struct thread *td, struct linux_old_select_args *args) 377 { 378 struct l_old_select_argv linux_args; 379 struct linux_select_args newsel; 380 int error; 381 382 error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 383 if (error) 384 return (error); 385 386 newsel.nfds = linux_args.nfds; 387 newsel.readfds = PTRIN(linux_args.readfds); 388 newsel.writefds = PTRIN(linux_args.writefds); 389 newsel.exceptfds = PTRIN(linux_args.exceptfds); 390 newsel.timeout = PTRIN(linux_args.timeout); 391 return (linux_select(td, &newsel)); 392 } 393 394 int 395 linux_set_cloned_tls(struct thread *td, void *desc) 396 { 397 struct user_segment_descriptor sd; 398 struct l_user_desc info; 399 struct pcb *pcb; 400 int error; 401 int a[2]; 402 403 error = copyin(desc, &info, sizeof(struct l_user_desc)); 404 if (error) { 405 linux_msg(td, "set_cloned_tls copyin info failed!"); 406 } else { 407 /* We might copy out the entry_number as GUGS32_SEL. */ 408 info.entry_number = GUGS32_SEL; 409 error = copyout(&info, desc, sizeof(struct l_user_desc)); 410 if (error) 411 linux_msg(td, "set_cloned_tls copyout info failed!"); 412 413 a[0] = LINUX_LDT_entry_a(&info); 414 a[1] = LINUX_LDT_entry_b(&info); 415 416 memcpy(&sd, &a, sizeof(a)); 417 pcb = td->td_pcb; 418 pcb->pcb_gsbase = (register_t)info.base_addr; 419 td->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL); 420 set_pcb_flags(pcb, PCB_32BIT); 421 } 422 423 return (error); 424 } 425 426 int 427 linux_set_upcall_kse(struct thread *td, register_t stack) 428 { 429 430 if (stack) 431 td->td_frame->tf_rsp = stack; 432 433 /* 434 * The newly created Linux thread returns 435 * to the user space by the same path that a parent do. 436 */ 437 td->td_frame->tf_rax = 0; 438 return (0); 439 } 440 441 int 442 linux_mmap2(struct thread *td, struct linux_mmap2_args *args) 443 { 444 445 return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot, 446 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff * 447 PAGE_SIZE)); 448 } 449 450 int 451 linux_mmap(struct thread *td, struct linux_mmap_args *args) 452 { 453 int error; 454 struct l_mmap_argv linux_args; 455 456 error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 457 if (error) 458 return (error); 459 460 return (linux_mmap_common(td, linux_args.addr, linux_args.len, 461 linux_args.prot, linux_args.flags, linux_args.fd, 462 (uint32_t)linux_args.pgoff)); 463 } 464 465 int 466 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 467 { 468 469 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot)); 470 } 471 472 int 473 linux_madvise(struct thread *td, struct linux_madvise_args *uap) 474 { 475 476 return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav)); 477 } 478 479 int 480 linux_iopl(struct thread *td, struct linux_iopl_args *args) 481 { 482 int error; 483 484 if (args->level < 0 || args->level > 3) 485 return (EINVAL); 486 if ((error = priv_check(td, PRIV_IO)) != 0) 487 return (error); 488 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 489 return (error); 490 td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) | 491 (args->level * (PSL_IOPL / 3)); 492 493 return (0); 494 } 495 496 int 497 linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 498 { 499 l_osigaction_t osa; 500 l_sigaction_t act, oact; 501 int error; 502 503 if (args->nsa != NULL) { 504 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t)); 505 if (error) 506 return (error); 507 act.lsa_handler = osa.lsa_handler; 508 act.lsa_flags = osa.lsa_flags; 509 act.lsa_restorer = osa.lsa_restorer; 510 LINUX_SIGEMPTYSET(act.lsa_mask); 511 act.lsa_mask.__mask = osa.lsa_mask; 512 } 513 514 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 515 args->osa ? &oact : NULL); 516 517 if (args->osa != NULL && !error) { 518 osa.lsa_handler = oact.lsa_handler; 519 osa.lsa_flags = oact.lsa_flags; 520 osa.lsa_restorer = oact.lsa_restorer; 521 osa.lsa_mask = oact.lsa_mask.__mask; 522 error = copyout(&osa, args->osa, sizeof(l_osigaction_t)); 523 } 524 525 return (error); 526 } 527 528 /* 529 * Linux has two extra args, restart and oldmask. We don't use these, 530 * but it seems that "restart" is actually a context pointer that 531 * enables the signal to happen with a different register set. 532 */ 533 int 534 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 535 { 536 sigset_t sigmask; 537 l_sigset_t mask; 538 539 LINUX_SIGEMPTYSET(mask); 540 mask.__mask = args->mask; 541 linux_to_bsd_sigset(&mask, &sigmask); 542 return (kern_sigsuspend(td, sigmask)); 543 } 544 545 int 546 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) 547 { 548 l_sigset_t lmask; 549 sigset_t sigmask; 550 int error; 551 552 if (uap->sigsetsize != sizeof(l_sigset_t)) 553 return (EINVAL); 554 555 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 556 if (error) 557 return (error); 558 559 linux_to_bsd_sigset(&lmask, &sigmask); 560 return (kern_sigsuspend(td, sigmask)); 561 } 562 563 int 564 linux_pause(struct thread *td, struct linux_pause_args *args) 565 { 566 struct proc *p = td->td_proc; 567 sigset_t sigmask; 568 569 PROC_LOCK(p); 570 sigmask = td->td_sigmask; 571 PROC_UNLOCK(p); 572 return (kern_sigsuspend(td, sigmask)); 573 } 574 575 int 576 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 577 { 578 stack_t ss, oss; 579 l_stack_t lss; 580 int error; 581 582 if (uap->uss != NULL) { 583 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 584 if (error) 585 return (error); 586 587 ss.ss_sp = PTRIN(lss.ss_sp); 588 ss.ss_size = lss.ss_size; 589 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 590 } 591 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, 592 (uap->uoss != NULL) ? &oss : NULL); 593 if (!error && uap->uoss != NULL) { 594 lss.ss_sp = PTROUT(oss.ss_sp); 595 lss.ss_size = oss.ss_size; 596 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 597 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 598 } 599 600 return (error); 601 } 602 603 int 604 linux_gettimeofday(struct thread *td, struct linux_gettimeofday_args *uap) 605 { 606 struct timeval atv; 607 l_timeval atv32; 608 struct timezone rtz; 609 int error = 0; 610 611 if (uap->tp) { 612 microtime(&atv); 613 atv32.tv_sec = atv.tv_sec; 614 atv32.tv_usec = atv.tv_usec; 615 error = copyout(&atv32, uap->tp, sizeof(atv32)); 616 } 617 if (error == 0 && uap->tzp != NULL) { 618 rtz.tz_minuteswest = 0; 619 rtz.tz_dsttime = 0; 620 error = copyout(&rtz, uap->tzp, sizeof(rtz)); 621 } 622 return (error); 623 } 624 625 int 626 linux_settimeofday(struct thread *td, struct linux_settimeofday_args *uap) 627 { 628 l_timeval atv32; 629 struct timeval atv, *tvp; 630 struct timezone atz, *tzp; 631 int error; 632 633 if (uap->tp) { 634 error = copyin(uap->tp, &atv32, sizeof(atv32)); 635 if (error) 636 return (error); 637 atv.tv_sec = atv32.tv_sec; 638 atv.tv_usec = atv32.tv_usec; 639 tvp = &atv; 640 } else 641 tvp = NULL; 642 if (uap->tzp) { 643 error = copyin(uap->tzp, &atz, sizeof(atz)); 644 if (error) 645 return (error); 646 tzp = &atz; 647 } else 648 tzp = NULL; 649 return (kern_settimeofday(td, tvp, tzp)); 650 } 651 652 int 653 linux_getrusage(struct thread *td, struct linux_getrusage_args *uap) 654 { 655 struct rusage s; 656 int error; 657 658 error = kern_getrusage(td, uap->who, &s); 659 if (error != 0) 660 return (error); 661 if (uap->rusage != NULL) 662 error = linux_copyout_rusage(&s, uap->rusage); 663 return (error); 664 } 665 666 int 667 linux_set_thread_area(struct thread *td, 668 struct linux_set_thread_area_args *args) 669 { 670 struct l_user_desc info; 671 struct user_segment_descriptor sd; 672 struct pcb *pcb; 673 int a[2]; 674 int error; 675 676 error = copyin(args->desc, &info, sizeof(struct l_user_desc)); 677 if (error) 678 return (error); 679 680 /* 681 * Semantics of Linux version: every thread in the system has array 682 * of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. 683 * This syscall loads one of the selected TLS decriptors with a value 684 * and also loads GDT descriptors 6, 7 and 8 with the content of 685 * the per-thread descriptors. 686 * 687 * Semantics of FreeBSD version: I think we can ignore that Linux has 688 * three per-thread descriptors and use just the first one. 689 * The tls_array[] is used only in [gs]et_thread_area() syscalls and 690 * for loading the GDT descriptors. We use just one GDT descriptor 691 * for TLS, so we will load just one. 692 * 693 * XXX: This doesn't work when a user space process tries to use more 694 * than one TLS segment. Comment in the Linux source says wine might 695 * do this. 696 */ 697 698 /* 699 * GLIBC reads current %gs and call set_thread_area() with it. 700 * We should let GUDATA_SEL and GUGS32_SEL proceed as well because 701 * we use these segments. 702 */ 703 switch (info.entry_number) { 704 case GUGS32_SEL: 705 case GUDATA_SEL: 706 case 6: 707 case -1: 708 info.entry_number = GUGS32_SEL; 709 break; 710 default: 711 return (EINVAL); 712 } 713 714 /* 715 * We have to copy out the GDT entry we use. 716 * 717 * XXX: What if a user space program does not check the return value 718 * and tries to use 6, 7 or 8? 719 */ 720 error = copyout(&info, args->desc, sizeof(struct l_user_desc)); 721 if (error) 722 return (error); 723 724 if (LINUX_LDT_empty(&info)) { 725 a[0] = 0; 726 a[1] = 0; 727 } else { 728 a[0] = LINUX_LDT_entry_a(&info); 729 a[1] = LINUX_LDT_entry_b(&info); 730 } 731 732 memcpy(&sd, &a, sizeof(a)); 733 pcb = td->td_pcb; 734 pcb->pcb_gsbase = (register_t)info.base_addr; 735 set_pcb_flags(pcb, PCB_32BIT); 736 update_gdt_gsbase(td, info.base_addr); 737 738 return (0); 739 } 740 741 int futex_xchgl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 742 int futex_xchgl_smap(int oparg, uint32_t *uaddr, int *oldval); 743 DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *)) 744 { 745 746 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 747 futex_xchgl_smap : futex_xchgl_nosmap); 748 } 749 750 int futex_addl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 751 int futex_addl_smap(int oparg, uint32_t *uaddr, int *oldval); 752 DEFINE_IFUNC(, int, futex_addl, (int, uint32_t *, int *)) 753 { 754 755 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 756 futex_addl_smap : futex_addl_nosmap); 757 } 758 759 int futex_orl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 760 int futex_orl_smap(int oparg, uint32_t *uaddr, int *oldval); 761 DEFINE_IFUNC(, int, futex_orl, (int, uint32_t *, int *)) 762 { 763 764 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 765 futex_orl_smap : futex_orl_nosmap); 766 } 767 768 int futex_andl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 769 int futex_andl_smap(int oparg, uint32_t *uaddr, int *oldval); 770 DEFINE_IFUNC(, int, futex_andl, (int, uint32_t *, int *)) 771 { 772 773 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 774 futex_andl_smap : futex_andl_nosmap); 775 } 776 777 int futex_xorl_nosmap(int oparg, uint32_t *uaddr, int *oldval); 778 int futex_xorl_smap(int oparg, uint32_t *uaddr, int *oldval); 779 DEFINE_IFUNC(, int, futex_xorl, (int, uint32_t *, int *)) 780 { 781 782 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ? 783 futex_xorl_smap : futex_xorl_nosmap); 784 } 785