1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2000 Marcel Moolenaar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in this position and unchanged. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/capsicum.h> 37 #include <sys/file.h> 38 #include <sys/fcntl.h> 39 #include <sys/imgact.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/mman.h> 43 #include <sys/mutex.h> 44 #include <sys/sx.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/queue.h> 48 #include <sys/resource.h> 49 #include <sys/resourcevar.h> 50 #include <sys/signalvar.h> 51 #include <sys/syscallsubr.h> 52 #include <sys/sysproto.h> 53 #include <sys/unistd.h> 54 #include <sys/wait.h> 55 #include <sys/sched.h> 56 57 #include <machine/frame.h> 58 #include <machine/psl.h> 59 #include <machine/segments.h> 60 #include <machine/sysarch.h> 61 62 #include <vm/vm.h> 63 #include <vm/pmap.h> 64 #include <vm/vm_map.h> 65 66 #include <i386/linux/linux.h> 67 #include <i386/linux/linux_proto.h> 68 #include <compat/linux/linux_ipc.h> 69 #include <compat/linux/linux_misc.h> 70 #include <compat/linux/linux_mmap.h> 71 #include <compat/linux/linux_signal.h> 72 #include <compat/linux/linux_util.h> 73 #include <compat/linux/linux_emul.h> 74 75 #include <i386/include/pcb.h> /* needed for pcb definition in linux_set_thread_area */ 76 77 #include "opt_posix.h" 78 79 extern struct sysentvec elf32_freebsd_sysvec; /* defined in i386/i386/elf_machdep.c */ 80 81 struct l_descriptor { 82 l_uint entry_number; 83 l_ulong base_addr; 84 l_uint limit; 85 l_uint seg_32bit:1; 86 l_uint contents:2; 87 l_uint read_exec_only:1; 88 l_uint limit_in_pages:1; 89 l_uint seg_not_present:1; 90 l_uint useable:1; 91 }; 92 93 struct l_old_select_argv { 94 l_int nfds; 95 l_fd_set *readfds; 96 l_fd_set *writefds; 97 l_fd_set *exceptfds; 98 struct l_timeval *timeout; 99 }; 100 101 102 int 103 linux_execve(struct thread *td, struct linux_execve_args *args) 104 { 105 struct image_args eargs; 106 char *newpath; 107 int error; 108 109 LCONVPATHEXIST(td, args->path, &newpath); 110 111 #ifdef DEBUG 112 if (ldebug(execve)) 113 printf(ARGS(execve, "%s"), newpath); 114 #endif 115 116 error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE, 117 args->argp, args->envp); 118 free(newpath, M_TEMP); 119 if (error == 0) 120 error = linux_common_execve(td, &eargs); 121 return (error); 122 } 123 124 struct l_ipc_kludge { 125 struct l_msgbuf *msgp; 126 l_long msgtyp; 127 }; 128 129 int 130 linux_ipc(struct thread *td, struct linux_ipc_args *args) 131 { 132 133 switch (args->what & 0xFFFF) { 134 case LINUX_SEMOP: { 135 struct linux_semop_args a; 136 137 a.semid = args->arg1; 138 a.tsops = args->ptr; 139 a.nsops = args->arg2; 140 return (linux_semop(td, &a)); 141 } 142 case LINUX_SEMGET: { 143 struct linux_semget_args a; 144 145 a.key = args->arg1; 146 a.nsems = args->arg2; 147 a.semflg = args->arg3; 148 return (linux_semget(td, &a)); 149 } 150 case LINUX_SEMCTL: { 151 struct linux_semctl_args a; 152 int error; 153 154 a.semid = args->arg1; 155 a.semnum = args->arg2; 156 a.cmd = args->arg3; 157 error = copyin(args->ptr, &a.arg, sizeof(a.arg)); 158 if (error) 159 return (error); 160 return (linux_semctl(td, &a)); 161 } 162 case LINUX_MSGSND: { 163 struct linux_msgsnd_args a; 164 165 a.msqid = args->arg1; 166 a.msgp = args->ptr; 167 a.msgsz = args->arg2; 168 a.msgflg = args->arg3; 169 return (linux_msgsnd(td, &a)); 170 } 171 case LINUX_MSGRCV: { 172 struct linux_msgrcv_args a; 173 174 a.msqid = args->arg1; 175 a.msgsz = args->arg2; 176 a.msgflg = args->arg3; 177 if ((args->what >> 16) == 0) { 178 struct l_ipc_kludge tmp; 179 int error; 180 181 if (args->ptr == NULL) 182 return (EINVAL); 183 error = copyin(args->ptr, &tmp, sizeof(tmp)); 184 if (error) 185 return (error); 186 a.msgp = tmp.msgp; 187 a.msgtyp = tmp.msgtyp; 188 } else { 189 a.msgp = args->ptr; 190 a.msgtyp = args->arg5; 191 } 192 return (linux_msgrcv(td, &a)); 193 } 194 case LINUX_MSGGET: { 195 struct linux_msgget_args a; 196 197 a.key = args->arg1; 198 a.msgflg = args->arg2; 199 return (linux_msgget(td, &a)); 200 } 201 case LINUX_MSGCTL: { 202 struct linux_msgctl_args a; 203 204 a.msqid = args->arg1; 205 a.cmd = args->arg2; 206 a.buf = args->ptr; 207 return (linux_msgctl(td, &a)); 208 } 209 case LINUX_SHMAT: { 210 struct linux_shmat_args a; 211 212 a.shmid = args->arg1; 213 a.shmaddr = args->ptr; 214 a.shmflg = args->arg2; 215 a.raddr = (l_ulong *)args->arg3; 216 return (linux_shmat(td, &a)); 217 } 218 case LINUX_SHMDT: { 219 struct linux_shmdt_args a; 220 221 a.shmaddr = args->ptr; 222 return (linux_shmdt(td, &a)); 223 } 224 case LINUX_SHMGET: { 225 struct linux_shmget_args a; 226 227 a.key = args->arg1; 228 a.size = args->arg2; 229 a.shmflg = args->arg3; 230 return (linux_shmget(td, &a)); 231 } 232 case LINUX_SHMCTL: { 233 struct linux_shmctl_args a; 234 235 a.shmid = args->arg1; 236 a.cmd = args->arg2; 237 a.buf = args->ptr; 238 return (linux_shmctl(td, &a)); 239 } 240 default: 241 break; 242 } 243 244 return (EINVAL); 245 } 246 247 int 248 linux_old_select(struct thread *td, struct linux_old_select_args *args) 249 { 250 struct l_old_select_argv linux_args; 251 struct linux_select_args newsel; 252 int error; 253 254 #ifdef DEBUG 255 if (ldebug(old_select)) 256 printf(ARGS(old_select, "%p"), args->ptr); 257 #endif 258 259 error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 260 if (error) 261 return (error); 262 263 newsel.nfds = linux_args.nfds; 264 newsel.readfds = linux_args.readfds; 265 newsel.writefds = linux_args.writefds; 266 newsel.exceptfds = linux_args.exceptfds; 267 newsel.timeout = linux_args.timeout; 268 return (linux_select(td, &newsel)); 269 } 270 271 int 272 linux_set_cloned_tls(struct thread *td, void *desc) 273 { 274 struct segment_descriptor sd; 275 struct l_user_desc info; 276 int idx, error; 277 int a[2]; 278 279 error = copyin(desc, &info, sizeof(struct l_user_desc)); 280 if (error) { 281 printf(LMSG("copyin failed!")); 282 } else { 283 idx = info.entry_number; 284 285 /* 286 * looks like we're getting the idx we returned 287 * in the set_thread_area() syscall 288 */ 289 if (idx != 6 && idx != 3) { 290 printf(LMSG("resetting idx!")); 291 idx = 3; 292 } 293 294 /* this doesnt happen in practice */ 295 if (idx == 6) { 296 /* we might copy out the entry_number as 3 */ 297 info.entry_number = 3; 298 error = copyout(&info, desc, sizeof(struct l_user_desc)); 299 if (error) 300 printf(LMSG("copyout failed!")); 301 } 302 303 a[0] = LINUX_LDT_entry_a(&info); 304 a[1] = LINUX_LDT_entry_b(&info); 305 306 memcpy(&sd, &a, sizeof(a)); 307 #ifdef DEBUG 308 if (ldebug(clone)) 309 printf("Segment created in clone with " 310 "CLONE_SETTLS: lobase: %x, hibase: %x, " 311 "lolimit: %x, hilimit: %x, type: %i, " 312 "dpl: %i, p: %i, xx: %i, def32: %i, " 313 "gran: %i\n", sd.sd_lobase, sd.sd_hibase, 314 sd.sd_lolimit, sd.sd_hilimit, sd.sd_type, 315 sd.sd_dpl, sd.sd_p, sd.sd_xx, 316 sd.sd_def32, sd.sd_gran); 317 #endif 318 319 /* set %gs */ 320 td->td_pcb->pcb_gsd = sd; 321 td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL); 322 } 323 324 return (error); 325 } 326 327 int 328 linux_set_upcall_kse(struct thread *td, register_t stack) 329 { 330 331 if (stack) 332 td->td_frame->tf_esp = stack; 333 334 /* 335 * The newly created Linux thread returns 336 * to the user space by the same path that a parent do. 337 */ 338 td->td_frame->tf_eax = 0; 339 return (0); 340 } 341 342 int 343 linux_mmap2(struct thread *td, struct linux_mmap2_args *args) 344 { 345 346 #ifdef DEBUG 347 if (ldebug(mmap2)) 348 printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"), 349 (void *)args->addr, args->len, args->prot, 350 args->flags, args->fd, args->pgoff); 351 #endif 352 353 return (linux_mmap_common(td, args->addr, args->len, args->prot, 354 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff * 355 PAGE_SIZE)); 356 } 357 358 int 359 linux_mmap(struct thread *td, struct linux_mmap_args *args) 360 { 361 int error; 362 struct l_mmap_argv linux_args; 363 364 error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 365 if (error) 366 return (error); 367 368 #ifdef DEBUG 369 if (ldebug(mmap)) 370 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 371 (void *)linux_args.addr, linux_args.len, linux_args.prot, 372 linux_args.flags, linux_args.fd, linux_args.pgoff); 373 #endif 374 375 return (linux_mmap_common(td, linux_args.addr, linux_args.len, 376 linux_args.prot, linux_args.flags, linux_args.fd, 377 (uint32_t)linux_args.pgoff)); 378 } 379 380 int 381 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 382 { 383 384 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot)); 385 } 386 387 int 388 linux_ioperm(struct thread *td, struct linux_ioperm_args *args) 389 { 390 int error; 391 struct i386_ioperm_args iia; 392 393 iia.start = args->start; 394 iia.length = args->length; 395 iia.enable = args->enable; 396 error = i386_set_ioperm(td, &iia); 397 return (error); 398 } 399 400 int 401 linux_iopl(struct thread *td, struct linux_iopl_args *args) 402 { 403 int error; 404 405 if (args->level < 0 || args->level > 3) 406 return (EINVAL); 407 if ((error = priv_check(td, PRIV_IO)) != 0) 408 return (error); 409 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 410 return (error); 411 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 412 (args->level * (PSL_IOPL / 3)); 413 return (0); 414 } 415 416 int 417 linux_modify_ldt(struct thread *td, struct linux_modify_ldt_args *uap) 418 { 419 int error; 420 struct i386_ldt_args ldt; 421 struct l_descriptor ld; 422 union descriptor desc; 423 int size, written; 424 425 switch (uap->func) { 426 case 0x00: /* read_ldt */ 427 ldt.start = 0; 428 ldt.descs = uap->ptr; 429 ldt.num = uap->bytecount / sizeof(union descriptor); 430 error = i386_get_ldt(td, &ldt); 431 td->td_retval[0] *= sizeof(union descriptor); 432 break; 433 case 0x02: /* read_default_ldt = 0 */ 434 size = 5*sizeof(struct l_desc_struct); 435 if (size > uap->bytecount) 436 size = uap->bytecount; 437 for (written = error = 0; written < size && error == 0; written++) 438 error = subyte((char *)uap->ptr + written, 0); 439 td->td_retval[0] = written; 440 break; 441 case 0x01: /* write_ldt */ 442 case 0x11: /* write_ldt */ 443 if (uap->bytecount != sizeof(ld)) 444 return (EINVAL); 445 446 error = copyin(uap->ptr, &ld, sizeof(ld)); 447 if (error) 448 return (error); 449 450 ldt.start = ld.entry_number; 451 ldt.descs = &desc; 452 ldt.num = 1; 453 desc.sd.sd_lolimit = (ld.limit & 0x0000ffff); 454 desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 455 desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff); 456 desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 457 desc.sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 458 (ld.contents << 2); 459 desc.sd.sd_dpl = 3; 460 desc.sd.sd_p = (ld.seg_not_present ^ 1); 461 desc.sd.sd_xx = 0; 462 desc.sd.sd_def32 = ld.seg_32bit; 463 desc.sd.sd_gran = ld.limit_in_pages; 464 error = i386_set_ldt(td, &ldt, &desc); 465 break; 466 default: 467 error = ENOSYS; 468 break; 469 } 470 471 if (error == EOPNOTSUPP) { 472 printf("linux: modify_ldt needs kernel option USER_LDT\n"); 473 error = ENOSYS; 474 } 475 476 return (error); 477 } 478 479 int 480 linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 481 { 482 l_osigaction_t osa; 483 l_sigaction_t act, oact; 484 int error; 485 486 #ifdef DEBUG 487 if (ldebug(sigaction)) 488 printf(ARGS(sigaction, "%d, %p, %p"), 489 args->sig, (void *)args->nsa, (void *)args->osa); 490 #endif 491 492 if (args->nsa != NULL) { 493 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t)); 494 if (error) 495 return (error); 496 act.lsa_handler = osa.lsa_handler; 497 act.lsa_flags = osa.lsa_flags; 498 act.lsa_restorer = osa.lsa_restorer; 499 LINUX_SIGEMPTYSET(act.lsa_mask); 500 act.lsa_mask.__mask = osa.lsa_mask; 501 } 502 503 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 504 args->osa ? &oact : NULL); 505 506 if (args->osa != NULL && !error) { 507 osa.lsa_handler = oact.lsa_handler; 508 osa.lsa_flags = oact.lsa_flags; 509 osa.lsa_restorer = oact.lsa_restorer; 510 osa.lsa_mask = oact.lsa_mask.__mask; 511 error = copyout(&osa, args->osa, sizeof(l_osigaction_t)); 512 } 513 514 return (error); 515 } 516 517 /* 518 * Linux has two extra args, restart and oldmask. We dont use these, 519 * but it seems that "restart" is actually a context pointer that 520 * enables the signal to happen with a different register set. 521 */ 522 int 523 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 524 { 525 sigset_t sigmask; 526 l_sigset_t mask; 527 528 #ifdef DEBUG 529 if (ldebug(sigsuspend)) 530 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 531 #endif 532 533 LINUX_SIGEMPTYSET(mask); 534 mask.__mask = args->mask; 535 linux_to_bsd_sigset(&mask, &sigmask); 536 return (kern_sigsuspend(td, sigmask)); 537 } 538 539 int 540 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) 541 { 542 l_sigset_t lmask; 543 sigset_t sigmask; 544 int error; 545 546 #ifdef DEBUG 547 if (ldebug(rt_sigsuspend)) 548 printf(ARGS(rt_sigsuspend, "%p, %d"), 549 (void *)uap->newset, uap->sigsetsize); 550 #endif 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 #ifdef DEBUG 570 if (ldebug(pause)) 571 printf(ARGS(pause, "")); 572 #endif 573 574 PROC_LOCK(p); 575 sigmask = td->td_sigmask; 576 PROC_UNLOCK(p); 577 return (kern_sigsuspend(td, sigmask)); 578 } 579 580 int 581 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 582 { 583 stack_t ss, oss; 584 l_stack_t lss; 585 int error; 586 587 #ifdef DEBUG 588 if (ldebug(sigaltstack)) 589 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 590 #endif 591 592 if (uap->uss != NULL) { 593 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 594 if (error) 595 return (error); 596 597 ss.ss_sp = lss.ss_sp; 598 ss.ss_size = lss.ss_size; 599 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 600 } 601 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, 602 (uap->uoss != NULL) ? &oss : NULL); 603 if (!error && uap->uoss != NULL) { 604 lss.ss_sp = oss.ss_sp; 605 lss.ss_size = oss.ss_size; 606 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 607 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 608 } 609 610 return (error); 611 } 612 613 int 614 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 615 { 616 617 #ifdef DEBUG 618 if (ldebug(ftruncate64)) 619 printf(ARGS(ftruncate64, "%u, %jd"), args->fd, 620 (intmax_t)args->length); 621 #endif 622 623 return (kern_ftruncate(td, args->fd, args->length)); 624 } 625 626 int 627 linux_set_thread_area(struct thread *td, struct linux_set_thread_area_args *args) 628 { 629 struct l_user_desc info; 630 int error; 631 int idx; 632 int a[2]; 633 struct segment_descriptor sd; 634 635 error = copyin(args->desc, &info, sizeof(struct l_user_desc)); 636 if (error) 637 return (error); 638 639 #ifdef DEBUG 640 if (ldebug(set_thread_area)) 641 printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"), 642 info.entry_number, 643 info.base_addr, 644 info.limit, 645 info.seg_32bit, 646 info.contents, 647 info.read_exec_only, 648 info.limit_in_pages, 649 info.seg_not_present, 650 info.useable); 651 #endif 652 653 idx = info.entry_number; 654 /* 655 * Semantics of linux version: every thread in the system has array of 656 * 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This 657 * syscall loads one of the selected tls decriptors with a value and 658 * also loads GDT descriptors 6, 7 and 8 with the content of the 659 * per-thread descriptors. 660 * 661 * Semantics of fbsd version: I think we can ignore that linux has 3 662 * per-thread descriptors and use just the 1st one. The tls_array[] 663 * is used only in set/get-thread_area() syscalls and for loading the 664 * GDT descriptors. In fbsd we use just one GDT descriptor for TLS so 665 * we will load just one. 666 * 667 * XXX: this doesn't work when a user space process tries to use more 668 * than 1 TLS segment. Comment in the linux sources says wine might do 669 * this. 670 */ 671 672 /* 673 * we support just GLIBC TLS now 674 * we should let 3 proceed as well because we use this segment so 675 * if code does two subsequent calls it should succeed 676 */ 677 if (idx != 6 && idx != -1 && idx != 3) 678 return (EINVAL); 679 680 /* 681 * we have to copy out the GDT entry we use 682 * FreeBSD uses GDT entry #3 for storing %gs so load that 683 * 684 * XXX: what if a user space program doesn't check this value and tries 685 * to use 6, 7 or 8? 686 */ 687 idx = info.entry_number = 3; 688 error = copyout(&info, args->desc, sizeof(struct l_user_desc)); 689 if (error) 690 return (error); 691 692 if (LINUX_LDT_empty(&info)) { 693 a[0] = 0; 694 a[1] = 0; 695 } else { 696 a[0] = LINUX_LDT_entry_a(&info); 697 a[1] = LINUX_LDT_entry_b(&info); 698 } 699 700 memcpy(&sd, &a, sizeof(a)); 701 #ifdef DEBUG 702 if (ldebug(set_thread_area)) 703 printf("Segment created in set_thread_area: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase, 704 sd.sd_hibase, 705 sd.sd_lolimit, 706 sd.sd_hilimit, 707 sd.sd_type, 708 sd.sd_dpl, 709 sd.sd_p, 710 sd.sd_xx, 711 sd.sd_def32, 712 sd.sd_gran); 713 #endif 714 715 /* this is taken from i386 version of cpu_set_user_tls() */ 716 critical_enter(); 717 /* set %gs */ 718 td->td_pcb->pcb_gsd = sd; 719 PCPU_GET(fsgs_gdt)[1] = sd; 720 load_gs(GSEL(GUGS_SEL, SEL_UPL)); 721 critical_exit(); 722 723 return (0); 724 } 725 726 int 727 linux_get_thread_area(struct thread *td, struct linux_get_thread_area_args *args) 728 { 729 730 struct l_user_desc info; 731 int error; 732 int idx; 733 struct l_desc_struct desc; 734 struct segment_descriptor sd; 735 736 #ifdef DEBUG 737 if (ldebug(get_thread_area)) 738 printf(ARGS(get_thread_area, "%p"), args->desc); 739 #endif 740 741 error = copyin(args->desc, &info, sizeof(struct l_user_desc)); 742 if (error) 743 return (error); 744 745 idx = info.entry_number; 746 /* XXX: I am not sure if we want 3 to be allowed too. */ 747 if (idx != 6 && idx != 3) 748 return (EINVAL); 749 750 idx = 3; 751 752 memset(&info, 0, sizeof(info)); 753 754 sd = PCPU_GET(fsgs_gdt)[1]; 755 756 memcpy(&desc, &sd, sizeof(desc)); 757 758 info.entry_number = idx; 759 info.base_addr = LINUX_GET_BASE(&desc); 760 info.limit = LINUX_GET_LIMIT(&desc); 761 info.seg_32bit = LINUX_GET_32BIT(&desc); 762 info.contents = LINUX_GET_CONTENTS(&desc); 763 info.read_exec_only = !LINUX_GET_WRITABLE(&desc); 764 info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc); 765 info.seg_not_present = !LINUX_GET_PRESENT(&desc); 766 info.useable = LINUX_GET_USEABLE(&desc); 767 768 error = copyout(&info, args->desc, sizeof(struct l_user_desc)); 769 if (error) 770 return (EFAULT); 771 772 return (0); 773 } 774 775 /* XXX: this wont work with module - convert it */ 776 int 777 linux_mq_open(struct thread *td, struct linux_mq_open_args *args) 778 { 779 #ifdef P1003_1B_MQUEUE 780 return sys_kmq_open(td, (struct kmq_open_args *) args); 781 #else 782 return (ENOSYS); 783 #endif 784 } 785 786 int 787 linux_mq_unlink(struct thread *td, struct linux_mq_unlink_args *args) 788 { 789 #ifdef P1003_1B_MQUEUE 790 return sys_kmq_unlink(td, (struct kmq_unlink_args *) args); 791 #else 792 return (ENOSYS); 793 #endif 794 } 795 796 int 797 linux_mq_timedsend(struct thread *td, struct linux_mq_timedsend_args *args) 798 { 799 #ifdef P1003_1B_MQUEUE 800 return sys_kmq_timedsend(td, (struct kmq_timedsend_args *) args); 801 #else 802 return (ENOSYS); 803 #endif 804 } 805 806 int 807 linux_mq_timedreceive(struct thread *td, struct linux_mq_timedreceive_args *args) 808 { 809 #ifdef P1003_1B_MQUEUE 810 return sys_kmq_timedreceive(td, (struct kmq_timedreceive_args *) args); 811 #else 812 return (ENOSYS); 813 #endif 814 } 815 816 int 817 linux_mq_notify(struct thread *td, struct linux_mq_notify_args *args) 818 { 819 #ifdef P1003_1B_MQUEUE 820 return sys_kmq_notify(td, (struct kmq_notify_args *) args); 821 #else 822 return (ENOSYS); 823 #endif 824 } 825 826 int 827 linux_mq_getsetattr(struct thread *td, struct linux_mq_getsetattr_args *args) 828 { 829 #ifdef P1003_1B_MQUEUE 830 return sys_kmq_setattr(td, (struct kmq_setattr_args *) args); 831 #else 832 return (ENOSYS); 833 #endif 834 } 835