linux_machdep.c revision 302964
1/*- 2 * Copyright (c) 2000 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/i386/linux/linux_machdep.c 302964 2016-07-17 15:23:32Z dchagin $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/capsicum.h> 35#include <sys/file.h> 36#include <sys/fcntl.h> 37#include <sys/imgact.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/mman.h> 41#include <sys/mutex.h> 42#include <sys/sx.h> 43#include <sys/priv.h> 44#include <sys/proc.h> 45#include <sys/queue.h> 46#include <sys/resource.h> 47#include <sys/resourcevar.h> 48#include <sys/signalvar.h> 49#include <sys/syscallsubr.h> 50#include <sys/sysproto.h> 51#include <sys/unistd.h> 52#include <sys/wait.h> 53#include <sys/sched.h> 54 55#include <machine/frame.h> 56#include <machine/psl.h> 57#include <machine/segments.h> 58#include <machine/sysarch.h> 59 60#include <vm/vm.h> 61#include <vm/pmap.h> 62#include <vm/vm_map.h> 63 64#include <i386/linux/linux.h> 65#include <i386/linux/linux_proto.h> 66#include <compat/linux/linux_ipc.h> 67#include <compat/linux/linux_misc.h> 68#include <compat/linux/linux_mmap.h> 69#include <compat/linux/linux_signal.h> 70#include <compat/linux/linux_util.h> 71#include <compat/linux/linux_emul.h> 72 73#include <i386/include/pcb.h> /* needed for pcb definition in linux_set_thread_area */ 74 75#include "opt_posix.h" 76 77extern struct sysentvec elf32_freebsd_sysvec; /* defined in i386/i386/elf_machdep.c */ 78 79struct l_descriptor { 80 l_uint entry_number; 81 l_ulong base_addr; 82 l_uint limit; 83 l_uint seg_32bit:1; 84 l_uint contents:2; 85 l_uint read_exec_only:1; 86 l_uint limit_in_pages:1; 87 l_uint seg_not_present:1; 88 l_uint useable:1; 89}; 90 91struct l_old_select_argv { 92 l_int nfds; 93 l_fd_set *readfds; 94 l_fd_set *writefds; 95 l_fd_set *exceptfds; 96 struct l_timeval *timeout; 97}; 98 99 100int 101linux_execve(struct thread *td, struct linux_execve_args *args) 102{ 103 struct image_args eargs; 104 char *newpath; 105 int error; 106 107 LCONVPATHEXIST(td, args->path, &newpath); 108 109#ifdef DEBUG 110 if (ldebug(execve)) 111 printf(ARGS(execve, "%s"), newpath); 112#endif 113 114 error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE, 115 args->argp, args->envp); 116 free(newpath, M_TEMP); 117 if (error == 0) 118 error = linux_common_execve(td, &eargs); 119 return (error); 120} 121 122struct l_ipc_kludge { 123 struct l_msgbuf *msgp; 124 l_long msgtyp; 125}; 126 127int 128linux_ipc(struct thread *td, struct linux_ipc_args *args) 129{ 130 131 switch (args->what & 0xFFFF) { 132 case LINUX_SEMOP: { 133 struct linux_semop_args a; 134 135 a.semid = args->arg1; 136 a.tsops = args->ptr; 137 a.nsops = args->arg2; 138 return (linux_semop(td, &a)); 139 } 140 case LINUX_SEMGET: { 141 struct linux_semget_args a; 142 143 a.key = args->arg1; 144 a.nsems = args->arg2; 145 a.semflg = args->arg3; 146 return (linux_semget(td, &a)); 147 } 148 case LINUX_SEMCTL: { 149 struct linux_semctl_args a; 150 int error; 151 152 a.semid = args->arg1; 153 a.semnum = args->arg2; 154 a.cmd = args->arg3; 155 error = copyin(args->ptr, &a.arg, sizeof(a.arg)); 156 if (error) 157 return (error); 158 return (linux_semctl(td, &a)); 159 } 160 case LINUX_MSGSND: { 161 struct linux_msgsnd_args a; 162 163 a.msqid = args->arg1; 164 a.msgp = args->ptr; 165 a.msgsz = args->arg2; 166 a.msgflg = args->arg3; 167 return (linux_msgsnd(td, &a)); 168 } 169 case LINUX_MSGRCV: { 170 struct linux_msgrcv_args a; 171 172 a.msqid = args->arg1; 173 a.msgsz = args->arg2; 174 a.msgflg = args->arg3; 175 if ((args->what >> 16) == 0) { 176 struct l_ipc_kludge tmp; 177 int error; 178 179 if (args->ptr == NULL) 180 return (EINVAL); 181 error = copyin(args->ptr, &tmp, sizeof(tmp)); 182 if (error) 183 return (error); 184 a.msgp = tmp.msgp; 185 a.msgtyp = tmp.msgtyp; 186 } else { 187 a.msgp = args->ptr; 188 a.msgtyp = args->arg5; 189 } 190 return (linux_msgrcv(td, &a)); 191 } 192 case LINUX_MSGGET: { 193 struct linux_msgget_args a; 194 195 a.key = args->arg1; 196 a.msgflg = args->arg2; 197 return (linux_msgget(td, &a)); 198 } 199 case LINUX_MSGCTL: { 200 struct linux_msgctl_args a; 201 202 a.msqid = args->arg1; 203 a.cmd = args->arg2; 204 a.buf = args->ptr; 205 return (linux_msgctl(td, &a)); 206 } 207 case LINUX_SHMAT: { 208 struct linux_shmat_args a; 209 210 a.shmid = args->arg1; 211 a.shmaddr = args->ptr; 212 a.shmflg = args->arg2; 213 a.raddr = (l_ulong *)args->arg3; 214 return (linux_shmat(td, &a)); 215 } 216 case LINUX_SHMDT: { 217 struct linux_shmdt_args a; 218 219 a.shmaddr = args->ptr; 220 return (linux_shmdt(td, &a)); 221 } 222 case LINUX_SHMGET: { 223 struct linux_shmget_args a; 224 225 a.key = args->arg1; 226 a.size = args->arg2; 227 a.shmflg = args->arg3; 228 return (linux_shmget(td, &a)); 229 } 230 case LINUX_SHMCTL: { 231 struct linux_shmctl_args a; 232 233 a.shmid = args->arg1; 234 a.cmd = args->arg2; 235 a.buf = args->ptr; 236 return (linux_shmctl(td, &a)); 237 } 238 default: 239 break; 240 } 241 242 return (EINVAL); 243} 244 245int 246linux_old_select(struct thread *td, struct linux_old_select_args *args) 247{ 248 struct l_old_select_argv linux_args; 249 struct linux_select_args newsel; 250 int error; 251 252#ifdef DEBUG 253 if (ldebug(old_select)) 254 printf(ARGS(old_select, "%p"), args->ptr); 255#endif 256 257 error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 258 if (error) 259 return (error); 260 261 newsel.nfds = linux_args.nfds; 262 newsel.readfds = linux_args.readfds; 263 newsel.writefds = linux_args.writefds; 264 newsel.exceptfds = linux_args.exceptfds; 265 newsel.timeout = linux_args.timeout; 266 return (linux_select(td, &newsel)); 267} 268 269int 270linux_set_cloned_tls(struct thread *td, void *desc) 271{ 272 struct segment_descriptor sd; 273 struct l_user_desc info; 274 int idx, error; 275 int a[2]; 276 277 error = copyin(desc, &info, sizeof(struct l_user_desc)); 278 if (error) { 279 printf(LMSG("copyin failed!")); 280 } else { 281 idx = info.entry_number; 282 283 /* 284 * looks like we're getting the idx we returned 285 * in the set_thread_area() syscall 286 */ 287 if (idx != 6 && idx != 3) { 288 printf(LMSG("resetting idx!")); 289 idx = 3; 290 } 291 292 /* this doesnt happen in practice */ 293 if (idx == 6) { 294 /* we might copy out the entry_number as 3 */ 295 info.entry_number = 3; 296 error = copyout(&info, desc, sizeof(struct l_user_desc)); 297 if (error) 298 printf(LMSG("copyout failed!")); 299 } 300 301 a[0] = LINUX_LDT_entry_a(&info); 302 a[1] = LINUX_LDT_entry_b(&info); 303 304 memcpy(&sd, &a, sizeof(a)); 305#ifdef DEBUG 306 if (ldebug(clone)) 307 printf("Segment created in clone with " 308 "CLONE_SETTLS: lobase: %x, hibase: %x, " 309 "lolimit: %x, hilimit: %x, type: %i, " 310 "dpl: %i, p: %i, xx: %i, def32: %i, " 311 "gran: %i\n", sd.sd_lobase, sd.sd_hibase, 312 sd.sd_lolimit, sd.sd_hilimit, sd.sd_type, 313 sd.sd_dpl, sd.sd_p, sd.sd_xx, 314 sd.sd_def32, sd.sd_gran); 315#endif 316 317 /* set %gs */ 318 td->td_pcb->pcb_gsd = sd; 319 td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL); 320 } 321 322 return (error); 323} 324 325int 326linux_set_upcall_kse(struct thread *td, register_t stack) 327{ 328 329 if (stack) 330 td->td_frame->tf_esp = stack; 331 332 /* 333 * The newly created Linux thread returns 334 * to the user space by the same path that a parent do. 335 */ 336 td->td_frame->tf_eax = 0; 337 return (0); 338} 339 340int 341linux_mmap2(struct thread *td, struct linux_mmap2_args *args) 342{ 343 344#ifdef DEBUG 345 if (ldebug(mmap2)) 346 printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"), 347 (void *)args->addr, args->len, args->prot, 348 args->flags, args->fd, args->pgoff); 349#endif 350 351 return (linux_mmap_common(td, args->addr, args->len, args->prot, 352 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff * 353 PAGE_SIZE)); 354} 355 356int 357linux_mmap(struct thread *td, struct linux_mmap_args *args) 358{ 359 int error; 360 struct l_mmap_argv linux_args; 361 362 error = copyin(args->ptr, &linux_args, sizeof(linux_args)); 363 if (error) 364 return (error); 365 366#ifdef DEBUG 367 if (ldebug(mmap)) 368 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 369 (void *)linux_args.addr, linux_args.len, linux_args.prot, 370 linux_args.flags, linux_args.fd, linux_args.pgoff); 371#endif 372 373 return (linux_mmap_common(td, linux_args.addr, linux_args.len, 374 linux_args.prot, linux_args.flags, linux_args.fd, 375 (uint32_t)linux_args.pgoff)); 376} 377 378int 379linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 380{ 381 382 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot)); 383} 384 385int 386linux_ioperm(struct thread *td, struct linux_ioperm_args *args) 387{ 388 int error; 389 struct i386_ioperm_args iia; 390 391 iia.start = args->start; 392 iia.length = args->length; 393 iia.enable = args->enable; 394 error = i386_set_ioperm(td, &iia); 395 return (error); 396} 397 398int 399linux_iopl(struct thread *td, struct linux_iopl_args *args) 400{ 401 int error; 402 403 if (args->level < 0 || args->level > 3) 404 return (EINVAL); 405 if ((error = priv_check(td, PRIV_IO)) != 0) 406 return (error); 407 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 408 return (error); 409 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 410 (args->level * (PSL_IOPL / 3)); 411 return (0); 412} 413 414int 415linux_modify_ldt(struct thread *td, struct linux_modify_ldt_args *uap) 416{ 417 int error; 418 struct i386_ldt_args ldt; 419 struct l_descriptor ld; 420 union descriptor desc; 421 int size, written; 422 423 switch (uap->func) { 424 case 0x00: /* read_ldt */ 425 ldt.start = 0; 426 ldt.descs = uap->ptr; 427 ldt.num = uap->bytecount / sizeof(union descriptor); 428 error = i386_get_ldt(td, &ldt); 429 td->td_retval[0] *= sizeof(union descriptor); 430 break; 431 case 0x02: /* read_default_ldt = 0 */ 432 size = 5*sizeof(struct l_desc_struct); 433 if (size > uap->bytecount) 434 size = uap->bytecount; 435 for (written = error = 0; written < size && error == 0; written++) 436 error = subyte((char *)uap->ptr + written, 0); 437 td->td_retval[0] = written; 438 break; 439 case 0x01: /* write_ldt */ 440 case 0x11: /* write_ldt */ 441 if (uap->bytecount != sizeof(ld)) 442 return (EINVAL); 443 444 error = copyin(uap->ptr, &ld, sizeof(ld)); 445 if (error) 446 return (error); 447 448 ldt.start = ld.entry_number; 449 ldt.descs = &desc; 450 ldt.num = 1; 451 desc.sd.sd_lolimit = (ld.limit & 0x0000ffff); 452 desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 453 desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff); 454 desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 455 desc.sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 456 (ld.contents << 2); 457 desc.sd.sd_dpl = 3; 458 desc.sd.sd_p = (ld.seg_not_present ^ 1); 459 desc.sd.sd_xx = 0; 460 desc.sd.sd_def32 = ld.seg_32bit; 461 desc.sd.sd_gran = ld.limit_in_pages; 462 error = i386_set_ldt(td, &ldt, &desc); 463 break; 464 default: 465 error = ENOSYS; 466 break; 467 } 468 469 if (error == EOPNOTSUPP) { 470 printf("linux: modify_ldt needs kernel option USER_LDT\n"); 471 error = ENOSYS; 472 } 473 474 return (error); 475} 476 477int 478linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 479{ 480 l_osigaction_t osa; 481 l_sigaction_t act, oact; 482 int error; 483 484#ifdef DEBUG 485 if (ldebug(sigaction)) 486 printf(ARGS(sigaction, "%d, %p, %p"), 487 args->sig, (void *)args->nsa, (void *)args->osa); 488#endif 489 490 if (args->nsa != NULL) { 491 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t)); 492 if (error) 493 return (error); 494 act.lsa_handler = osa.lsa_handler; 495 act.lsa_flags = osa.lsa_flags; 496 act.lsa_restorer = osa.lsa_restorer; 497 LINUX_SIGEMPTYSET(act.lsa_mask); 498 act.lsa_mask.__mask = osa.lsa_mask; 499 } 500 501 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 502 args->osa ? &oact : NULL); 503 504 if (args->osa != NULL && !error) { 505 osa.lsa_handler = oact.lsa_handler; 506 osa.lsa_flags = oact.lsa_flags; 507 osa.lsa_restorer = oact.lsa_restorer; 508 osa.lsa_mask = oact.lsa_mask.__mask; 509 error = copyout(&osa, args->osa, sizeof(l_osigaction_t)); 510 } 511 512 return (error); 513} 514 515/* 516 * Linux has two extra args, restart and oldmask. We dont use these, 517 * but it seems that "restart" is actually a context pointer that 518 * enables the signal to happen with a different register set. 519 */ 520int 521linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 522{ 523 sigset_t sigmask; 524 l_sigset_t mask; 525 526#ifdef DEBUG 527 if (ldebug(sigsuspend)) 528 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 529#endif 530 531 LINUX_SIGEMPTYSET(mask); 532 mask.__mask = args->mask; 533 linux_to_bsd_sigset(&mask, &sigmask); 534 return (kern_sigsuspend(td, sigmask)); 535} 536 537int 538linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap) 539{ 540 l_sigset_t lmask; 541 sigset_t sigmask; 542 int error; 543 544#ifdef DEBUG 545 if (ldebug(rt_sigsuspend)) 546 printf(ARGS(rt_sigsuspend, "%p, %d"), 547 (void *)uap->newset, uap->sigsetsize); 548#endif 549 550 if (uap->sigsetsize != sizeof(l_sigset_t)) 551 return (EINVAL); 552 553 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 554 if (error) 555 return (error); 556 557 linux_to_bsd_sigset(&lmask, &sigmask); 558 return (kern_sigsuspend(td, sigmask)); 559} 560 561int 562linux_pause(struct thread *td, struct linux_pause_args *args) 563{ 564 struct proc *p = td->td_proc; 565 sigset_t sigmask; 566 567#ifdef DEBUG 568 if (ldebug(pause)) 569 printf(ARGS(pause, "")); 570#endif 571 572 PROC_LOCK(p); 573 sigmask = td->td_sigmask; 574 PROC_UNLOCK(p); 575 return (kern_sigsuspend(td, sigmask)); 576} 577 578int 579linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 580{ 581 stack_t ss, oss; 582 l_stack_t lss; 583 int error; 584 585#ifdef DEBUG 586 if (ldebug(sigaltstack)) 587 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 588#endif 589 590 if (uap->uss != NULL) { 591 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 592 if (error) 593 return (error); 594 595 ss.ss_sp = lss.ss_sp; 596 ss.ss_size = lss.ss_size; 597 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 598 } 599 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL, 600 (uap->uoss != NULL) ? &oss : NULL); 601 if (!error && uap->uoss != NULL) { 602 lss.ss_sp = oss.ss_sp; 603 lss.ss_size = oss.ss_size; 604 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 605 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 606 } 607 608 return (error); 609} 610 611int 612linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 613{ 614 struct ftruncate_args sa; 615 616#ifdef DEBUG 617 if (ldebug(ftruncate64)) 618 printf(ARGS(ftruncate64, "%u, %jd"), args->fd, 619 (intmax_t)args->length); 620#endif 621 622 sa.fd = args->fd; 623 sa.length = args->length; 624 return sys_ftruncate(td, &sa); 625} 626 627int 628linux_set_thread_area(struct thread *td, struct linux_set_thread_area_args *args) 629{ 630 struct l_user_desc info; 631 int error; 632 int idx; 633 int a[2]; 634 struct segment_descriptor sd; 635 636 error = copyin(args->desc, &info, sizeof(struct l_user_desc)); 637 if (error) 638 return (error); 639 640#ifdef DEBUG 641 if (ldebug(set_thread_area)) 642 printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"), 643 info.entry_number, 644 info.base_addr, 645 info.limit, 646 info.seg_32bit, 647 info.contents, 648 info.read_exec_only, 649 info.limit_in_pages, 650 info.seg_not_present, 651 info.useable); 652#endif 653 654 idx = info.entry_number; 655 /* 656 * Semantics of linux version: every thread in the system has array of 657 * 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This 658 * syscall loads one of the selected tls decriptors with a value and 659 * also loads GDT descriptors 6, 7 and 8 with the content of the 660 * per-thread descriptors. 661 * 662 * Semantics of fbsd version: I think we can ignore that linux has 3 663 * per-thread descriptors and use just the 1st one. The tls_array[] 664 * is used only in set/get-thread_area() syscalls and for loading the 665 * GDT descriptors. In fbsd we use just one GDT descriptor for TLS so 666 * we will load just one. 667 * 668 * XXX: this doesn't work when a user space process tries to use more 669 * than 1 TLS segment. Comment in the linux sources says wine might do 670 * this. 671 */ 672 673 /* 674 * we support just GLIBC TLS now 675 * we should let 3 proceed as well because we use this segment so 676 * if code does two subsequent calls it should succeed 677 */ 678 if (idx != 6 && idx != -1 && idx != 3) 679 return (EINVAL); 680 681 /* 682 * we have to copy out the GDT entry we use 683 * FreeBSD uses GDT entry #3 for storing %gs so load that 684 * 685 * XXX: what if a user space program doesn't check this value and tries 686 * to use 6, 7 or 8? 687 */ 688 idx = info.entry_number = 3; 689 error = copyout(&info, args->desc, sizeof(struct l_user_desc)); 690 if (error) 691 return (error); 692 693 if (LINUX_LDT_empty(&info)) { 694 a[0] = 0; 695 a[1] = 0; 696 } else { 697 a[0] = LINUX_LDT_entry_a(&info); 698 a[1] = LINUX_LDT_entry_b(&info); 699 } 700 701 memcpy(&sd, &a, sizeof(a)); 702#ifdef DEBUG 703 if (ldebug(set_thread_area)) 704 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, 705 sd.sd_hibase, 706 sd.sd_lolimit, 707 sd.sd_hilimit, 708 sd.sd_type, 709 sd.sd_dpl, 710 sd.sd_p, 711 sd.sd_xx, 712 sd.sd_def32, 713 sd.sd_gran); 714#endif 715 716 /* this is taken from i386 version of cpu_set_user_tls() */ 717 critical_enter(); 718 /* set %gs */ 719 td->td_pcb->pcb_gsd = sd; 720 PCPU_GET(fsgs_gdt)[1] = sd; 721 load_gs(GSEL(GUGS_SEL, SEL_UPL)); 722 critical_exit(); 723 724 return (0); 725} 726 727int 728linux_get_thread_area(struct thread *td, struct linux_get_thread_area_args *args) 729{ 730 731 struct l_user_desc info; 732 int error; 733 int idx; 734 struct l_desc_struct desc; 735 struct segment_descriptor sd; 736 737#ifdef DEBUG 738 if (ldebug(get_thread_area)) 739 printf(ARGS(get_thread_area, "%p"), args->desc); 740#endif 741 742 error = copyin(args->desc, &info, sizeof(struct l_user_desc)); 743 if (error) 744 return (error); 745 746 idx = info.entry_number; 747 /* XXX: I am not sure if we want 3 to be allowed too. */ 748 if (idx != 6 && idx != 3) 749 return (EINVAL); 750 751 idx = 3; 752 753 memset(&info, 0, sizeof(info)); 754 755 sd = PCPU_GET(fsgs_gdt)[1]; 756 757 memcpy(&desc, &sd, sizeof(desc)); 758 759 info.entry_number = idx; 760 info.base_addr = LINUX_GET_BASE(&desc); 761 info.limit = LINUX_GET_LIMIT(&desc); 762 info.seg_32bit = LINUX_GET_32BIT(&desc); 763 info.contents = LINUX_GET_CONTENTS(&desc); 764 info.read_exec_only = !LINUX_GET_WRITABLE(&desc); 765 info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc); 766 info.seg_not_present = !LINUX_GET_PRESENT(&desc); 767 info.useable = LINUX_GET_USEABLE(&desc); 768 769 error = copyout(&info, args->desc, sizeof(struct l_user_desc)); 770 if (error) 771 return (EFAULT); 772 773 return (0); 774} 775 776/* XXX: this wont work with module - convert it */ 777int 778linux_mq_open(struct thread *td, struct linux_mq_open_args *args) 779{ 780#ifdef P1003_1B_MQUEUE 781 return sys_kmq_open(td, (struct kmq_open_args *) args); 782#else 783 return (ENOSYS); 784#endif 785} 786 787int 788linux_mq_unlink(struct thread *td, struct linux_mq_unlink_args *args) 789{ 790#ifdef P1003_1B_MQUEUE 791 return sys_kmq_unlink(td, (struct kmq_unlink_args *) args); 792#else 793 return (ENOSYS); 794#endif 795} 796 797int 798linux_mq_timedsend(struct thread *td, struct linux_mq_timedsend_args *args) 799{ 800#ifdef P1003_1B_MQUEUE 801 return sys_kmq_timedsend(td, (struct kmq_timedsend_args *) args); 802#else 803 return (ENOSYS); 804#endif 805} 806 807int 808linux_mq_timedreceive(struct thread *td, struct linux_mq_timedreceive_args *args) 809{ 810#ifdef P1003_1B_MQUEUE 811 return sys_kmq_timedreceive(td, (struct kmq_timedreceive_args *) args); 812#else 813 return (ENOSYS); 814#endif 815} 816 817int 818linux_mq_notify(struct thread *td, struct linux_mq_notify_args *args) 819{ 820#ifdef P1003_1B_MQUEUE 821 return sys_kmq_notify(td, (struct kmq_notify_args *) args); 822#else 823 return (ENOSYS); 824#endif 825} 826 827int 828linux_mq_getsetattr(struct thread *td, struct linux_mq_getsetattr_args *args) 829{ 830#ifdef P1003_1B_MQUEUE 831 return sys_kmq_setattr(td, (struct kmq_setattr_args *) args); 832#else 833 return (ENOSYS); 834#endif 835} 836