linux_machdep.c revision 104354
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 * $FreeBSD: head/sys/i386/linux/linux_machdep.c 104354 2002-10-02 07:44:29Z scottl $ 29 */ 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/lock.h> 34#include <sys/mman.h> 35#include <sys/mutex.h> 36#include <sys/proc.h> 37#include <sys/resource.h> 38#include <sys/resourcevar.h> 39#include <sys/syscallsubr.h> 40#include <sys/sysproto.h> 41#include <sys/unistd.h> 42 43#include <machine/frame.h> 44#include <machine/psl.h> 45#include <machine/segments.h> 46#include <machine/sysarch.h> 47 48#include <vm/vm.h> 49#include <vm/pmap.h> 50#include <vm/vm_map.h> 51 52#include <i386/linux/linux.h> 53#include <i386/linux/linux_proto.h> 54#include <compat/linux/linux_ipc.h> 55#include <compat/linux/linux_signal.h> 56#include <compat/linux/linux_util.h> 57 58struct l_descriptor { 59 l_uint entry_number; 60 l_ulong base_addr; 61 l_uint limit; 62 l_uint seg_32bit:1; 63 l_uint contents:2; 64 l_uint read_exec_only:1; 65 l_uint limit_in_pages:1; 66 l_uint seg_not_present:1; 67 l_uint useable:1; 68}; 69 70struct l_old_select_argv { 71 l_int nfds; 72 l_fd_set *readfds; 73 l_fd_set *writefds; 74 l_fd_set *exceptfds; 75 struct l_timeval *timeout; 76}; 77 78int 79linux_to_bsd_sigaltstack(int lsa) 80{ 81 int bsa = 0; 82 83 if (lsa & LINUX_SS_DISABLE) 84 bsa |= SS_DISABLE; 85 if (lsa & LINUX_SS_ONSTACK) 86 bsa |= SS_ONSTACK; 87 return (bsa); 88} 89 90int 91bsd_to_linux_sigaltstack(int bsa) 92{ 93 int lsa = 0; 94 95 if (bsa & SS_DISABLE) 96 lsa |= LINUX_SS_DISABLE; 97 if (bsa & SS_ONSTACK) 98 lsa |= LINUX_SS_ONSTACK; 99 return (lsa); 100} 101 102int 103linux_execve(struct thread *td, struct linux_execve_args *args) 104{ 105 struct execve_args bsd; 106 caddr_t sg; 107 108 sg = stackgap_init(); 109 CHECKALTEXIST(td, &sg, args->path); 110 111#ifdef DEBUG 112 if (ldebug(execve)) 113 printf(ARGS(execve, "%s"), args->path); 114#endif 115 116 bsd.fname = args->path; 117 bsd.argv = args->argp; 118 bsd.envv = args->envp; 119 return (execve(td, &bsd)); 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((caddr_t)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((caddr_t)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((caddr_t)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_fork(struct thread *td, struct linux_fork_args *args) 271{ 272 int error; 273 274#ifdef DEBUG 275 if (ldebug(fork)) 276 printf(ARGS(fork, "")); 277#endif 278 279 if ((error = fork(td, (struct fork_args *)args)) != 0) 280 return (error); 281 282 if (td->td_retval[1] == 1) 283 td->td_retval[0] = 0; 284 return (0); 285} 286 287int 288linux_vfork(struct thread *td, struct linux_vfork_args *args) 289{ 290 int error; 291 292#ifdef DEBUG 293 if (ldebug(vfork)) 294 printf(ARGS(vfork, "")); 295#endif 296 297 if ((error = vfork(td, (struct vfork_args *)args)) != 0) 298 return (error); 299 /* Are we the child? */ 300 if (td->td_retval[1] == 1) 301 td->td_retval[0] = 0; 302 return (0); 303} 304 305#define CLONE_VM 0x100 306#define CLONE_FS 0x200 307#define CLONE_FILES 0x400 308#define CLONE_SIGHAND 0x800 309#define CLONE_PID 0x1000 310 311int 312linux_clone(struct thread *td, struct linux_clone_args *args) 313{ 314 int error, ff = RFPROC | RFSTOPPED; 315 struct proc *p2; 316 int exit_signal; 317 318#ifdef DEBUG 319 if (ldebug(clone)) { 320 printf(ARGS(clone, "flags %x, stack %x"), 321 (unsigned int)args->flags, (unsigned int)args->stack); 322 if (args->flags & CLONE_PID) 323 printf(LMSG("CLONE_PID not yet supported")); 324 } 325#endif 326 327 if (!args->stack) 328 return (EINVAL); 329 330 exit_signal = args->flags & 0x000000ff; 331 if (exit_signal >= LINUX_NSIG) 332 return (EINVAL); 333 334 if (exit_signal <= LINUX_SIGTBLSZ) 335 exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)]; 336 337 if (args->flags & CLONE_VM) 338 ff |= RFMEM; 339 if (args->flags & CLONE_SIGHAND) 340 ff |= RFSIGSHARE; 341 if (!(args->flags & CLONE_FILES)) 342 ff |= RFFDG; 343 344 mtx_lock(&Giant); 345 error = fork1(td, ff, 0, &p2); 346 if (error == 0) { 347 td->td_retval[0] = p2->p_pid; 348 td->td_retval[1] = 0; 349 350 PROC_LOCK(p2); 351 p2->p_sigparent = exit_signal; 352 FIRST_THREAD_IN_PROC(p2)->td_frame->tf_esp = 353 (unsigned int)args->stack; 354 355#ifdef DEBUG 356 if (ldebug(clone)) 357 printf(LMSG("clone: successful rfork to %ld"), 358 (long)p2->p_pid); 359#endif 360 361 /* 362 * Make this runnable after we are finished with it. 363 */ 364 mtx_lock_spin(&sched_lock); 365 TD_SET_CAN_RUN(FIRST_THREAD_IN_PROC(p2)); 366 setrunqueue(FIRST_THREAD_IN_PROC(p2)); 367 mtx_unlock_spin(&sched_lock); 368 PROC_UNLOCK(p2); 369 } 370 mtx_unlock(&Giant); 371 372 return (error); 373} 374 375/* XXX move */ 376struct l_mmap_argv { 377 l_caddr_t addr; 378 l_int len; 379 l_int prot; 380 l_int flags; 381 l_int fd; 382 l_int pos; 383}; 384 385#define STACK_SIZE (2 * 1024 * 1024) 386#define GUARD_SIZE (4 * PAGE_SIZE) 387 388int 389linux_mmap(struct thread *td, struct linux_mmap_args *args) 390{ 391 struct proc *p = td->td_proc; 392 struct mmap_args /* { 393 caddr_t addr; 394 size_t len; 395 int prot; 396 int flags; 397 int fd; 398 long pad; 399 off_t pos; 400 } */ bsd_args; 401 int error; 402 struct l_mmap_argv linux_args; 403 404 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 405 if (error) 406 return (error); 407 408#ifdef DEBUG 409 if (ldebug(mmap)) 410 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 411 (void *)linux_args.addr, linux_args.len, linux_args.prot, 412 linux_args.flags, linux_args.fd, linux_args.pos); 413#endif 414 415 bsd_args.flags = 0; 416 if (linux_args.flags & LINUX_MAP_SHARED) 417 bsd_args.flags |= MAP_SHARED; 418 if (linux_args.flags & LINUX_MAP_PRIVATE) 419 bsd_args.flags |= MAP_PRIVATE; 420 if (linux_args.flags & LINUX_MAP_FIXED) 421 bsd_args.flags |= MAP_FIXED; 422 if (linux_args.flags & LINUX_MAP_ANON) 423 bsd_args.flags |= MAP_ANON; 424 else 425 bsd_args.flags |= MAP_NOSYNC; 426 if (linux_args.flags & LINUX_MAP_GROWSDOWN) { 427 bsd_args.flags |= MAP_STACK; 428 429 /* The linux MAP_GROWSDOWN option does not limit auto 430 * growth of the region. Linux mmap with this option 431 * takes as addr the inital BOS, and as len, the initial 432 * region size. It can then grow down from addr without 433 * limit. However, linux threads has an implicit internal 434 * limit to stack size of STACK_SIZE. Its just not 435 * enforced explicitly in linux. But, here we impose 436 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 437 * region, since we can do this with our mmap. 438 * 439 * Our mmap with MAP_STACK takes addr as the maximum 440 * downsize limit on BOS, and as len the max size of 441 * the region. It them maps the top SGROWSIZ bytes, 442 * and autgrows the region down, up to the limit 443 * in addr. 444 * 445 * If we don't use the MAP_STACK option, the effect 446 * of this code is to allocate a stack region of a 447 * fixed size of (STACK_SIZE - GUARD_SIZE). 448 */ 449 450 /* This gives us TOS */ 451 bsd_args.addr = linux_args.addr + linux_args.len; 452 453 if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) { 454 /* Some linux apps will attempt to mmap 455 * thread stacks near the top of their 456 * address space. If their TOS is greater 457 * than vm_maxsaddr, vm_map_growstack() 458 * will confuse the thread stack with the 459 * process stack and deliver a SEGV if they 460 * attempt to grow the thread stack past their 461 * current stacksize rlimit. To avoid this, 462 * adjust vm_maxsaddr upwards to reflect 463 * the current stacksize rlimit rather 464 * than the maximum possible stacksize. 465 * It would be better to adjust the 466 * mmap'ed region, but some apps do not check 467 * mmap's return value. 468 */ 469 mtx_assert(&Giant, MA_OWNED); 470 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK - 471 p->p_rlimit[RLIMIT_STACK].rlim_cur; 472 } 473 474 /* This gives us our maximum stack size */ 475 if (linux_args.len > STACK_SIZE - GUARD_SIZE) 476 bsd_args.len = linux_args.len; 477 else 478 bsd_args.len = STACK_SIZE - GUARD_SIZE; 479 480 /* This gives us a new BOS. If we're using VM_STACK, then 481 * mmap will just map the top SGROWSIZ bytes, and let 482 * the stack grow down to the limit at BOS. If we're 483 * not using VM_STACK we map the full stack, since we 484 * don't have a way to autogrow it. 485 */ 486 bsd_args.addr -= bsd_args.len; 487 } else { 488 bsd_args.addr = linux_args.addr; 489 bsd_args.len = linux_args.len; 490 } 491 492 bsd_args.prot = linux_args.prot | PROT_READ; /* always required */ 493 if (linux_args.flags & LINUX_MAP_ANON) 494 bsd_args.fd = -1; 495 else 496 bsd_args.fd = linux_args.fd; 497 bsd_args.pos = linux_args.pos; 498 bsd_args.pad = 0; 499 500#ifdef DEBUG 501 if (ldebug(mmap)) 502 printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", 503 (void *)bsd_args.addr, bsd_args.len, bsd_args.prot, 504 bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); 505#endif 506 507 return (mmap(td, &bsd_args)); 508} 509 510int 511linux_pipe(struct thread *td, struct linux_pipe_args *args) 512{ 513 int error; 514 int reg_edx; 515 516#ifdef DEBUG 517 if (ldebug(pipe)) 518 printf(ARGS(pipe, "*")); 519#endif 520 521 reg_edx = td->td_retval[1]; 522 error = pipe(td, 0); 523 if (error) { 524 td->td_retval[1] = reg_edx; 525 return (error); 526 } 527 528 error = copyout(td->td_retval, args->pipefds, 2*sizeof(int)); 529 if (error) { 530 td->td_retval[1] = reg_edx; 531 return (error); 532 } 533 534 td->td_retval[1] = reg_edx; 535 td->td_retval[0] = 0; 536 return (0); 537} 538 539int 540linux_ioperm(struct thread *td, struct linux_ioperm_args *args) 541{ 542 struct sysarch_args sa; 543 struct i386_ioperm_args *iia; 544 caddr_t sg; 545 546 sg = stackgap_init(); 547 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); 548 iia->start = args->start; 549 iia->length = args->length; 550 iia->enable = args->enable; 551 sa.op = I386_SET_IOPERM; 552 sa.parms = (char *)iia; 553 return (sysarch(td, &sa)); 554} 555 556int 557linux_iopl(struct thread *td, struct linux_iopl_args *args) 558{ 559 int error; 560 561 if (args->level < 0 || args->level > 3) 562 return (EINVAL); 563 if ((error = suser(td)) != 0) 564 return (error); 565 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 566 return (error); 567 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 568 (args->level * (PSL_IOPL / 3)); 569 return (0); 570} 571 572int 573linux_modify_ldt(td, uap) 574 struct thread *td; 575 struct linux_modify_ldt_args *uap; 576{ 577 int error; 578 caddr_t sg; 579 struct sysarch_args args; 580 struct i386_ldt_args *ldt; 581 struct l_descriptor ld; 582 union descriptor *desc; 583 584 sg = stackgap_init(); 585 586 if (uap->ptr == NULL) 587 return (EINVAL); 588 589 switch (uap->func) { 590 case 0x00: /* read_ldt */ 591 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 592 ldt->start = 0; 593 ldt->descs = uap->ptr; 594 ldt->num = uap->bytecount / sizeof(union descriptor); 595 args.op = I386_GET_LDT; 596 args.parms = (char*)ldt; 597 error = sysarch(td, &args); 598 td->td_retval[0] *= sizeof(union descriptor); 599 break; 600 case 0x01: /* write_ldt */ 601 case 0x11: /* write_ldt */ 602 if (uap->bytecount != sizeof(ld)) 603 return (EINVAL); 604 605 error = copyin(uap->ptr, &ld, sizeof(ld)); 606 if (error) 607 return (error); 608 609 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 610 desc = stackgap_alloc(&sg, sizeof(*desc)); 611 ldt->start = ld.entry_number; 612 ldt->descs = desc; 613 ldt->num = 1; 614 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); 615 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 616 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); 617 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 618 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 619 (ld.contents << 2); 620 desc->sd.sd_dpl = 3; 621 desc->sd.sd_p = (ld.seg_not_present ^ 1); 622 desc->sd.sd_xx = 0; 623 desc->sd.sd_def32 = ld.seg_32bit; 624 desc->sd.sd_gran = ld.limit_in_pages; 625 args.op = I386_SET_LDT; 626 args.parms = (char*)ldt; 627 error = sysarch(td, &args); 628 break; 629 default: 630 error = EINVAL; 631 break; 632 } 633 634 if (error == EOPNOTSUPP) { 635 printf("linux: modify_ldt needs kernel option USER_LDT\n"); 636 error = ENOSYS; 637 } 638 639 return (error); 640} 641 642int 643linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 644{ 645 l_osigaction_t osa; 646 l_sigaction_t act, oact; 647 int error; 648 649#ifdef DEBUG 650 if (ldebug(sigaction)) 651 printf(ARGS(sigaction, "%d, %p, %p"), 652 args->sig, (void *)args->nsa, (void *)args->osa); 653#endif 654 655 if (args->nsa != NULL) { 656 error = copyin((caddr_t)args->nsa, &osa, 657 sizeof(l_osigaction_t)); 658 if (error) 659 return (error); 660 act.lsa_handler = osa.lsa_handler; 661 act.lsa_flags = osa.lsa_flags; 662 act.lsa_restorer = osa.lsa_restorer; 663 LINUX_SIGEMPTYSET(act.lsa_mask); 664 act.lsa_mask.__bits[0] = osa.lsa_mask; 665 } 666 667 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 668 args->osa ? &oact : NULL); 669 670 if (args->osa != NULL && !error) { 671 osa.lsa_handler = oact.lsa_handler; 672 osa.lsa_flags = oact.lsa_flags; 673 osa.lsa_restorer = oact.lsa_restorer; 674 osa.lsa_mask = oact.lsa_mask.__bits[0]; 675 error = copyout(&osa, (caddr_t)args->osa, 676 sizeof(l_osigaction_t)); 677 } 678 679 return (error); 680} 681 682/* 683 * Linux has two extra args, restart and oldmask. We dont use these, 684 * but it seems that "restart" is actually a context pointer that 685 * enables the signal to happen with a different register set. 686 */ 687int 688linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 689{ 690 sigset_t sigmask; 691 l_sigset_t mask; 692 693#ifdef DEBUG 694 if (ldebug(sigsuspend)) 695 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 696#endif 697 698 LINUX_SIGEMPTYSET(mask); 699 mask.__bits[0] = args->mask; 700 linux_to_bsd_sigset(&mask, &sigmask); 701 return (kern_sigsuspend(td, sigmask)); 702} 703 704int 705linux_rt_sigsuspend(td, uap) 706 struct thread *td; 707 struct linux_rt_sigsuspend_args *uap; 708{ 709 l_sigset_t lmask; 710 sigset_t sigmask; 711 int error; 712 713#ifdef DEBUG 714 if (ldebug(rt_sigsuspend)) 715 printf(ARGS(rt_sigsuspend, "%p, %d"), 716 (void *)uap->newset, uap->sigsetsize); 717#endif 718 719 if (uap->sigsetsize != sizeof(l_sigset_t)) 720 return (EINVAL); 721 722 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 723 if (error) 724 return (error); 725 726 linux_to_bsd_sigset(&lmask, &sigmask); 727 return (kern_sigsuspend(td, sigmask)); 728} 729 730int 731linux_pause(struct thread *td, struct linux_pause_args *args) 732{ 733 struct proc *p = td->td_proc; 734 sigset_t sigmask; 735 736#ifdef DEBUG 737 if (ldebug(pause)) 738 printf(ARGS(pause, "")); 739#endif 740 741 PROC_LOCK(p); 742 sigmask = p->p_sigmask; 743 PROC_UNLOCK(p); 744 return (kern_sigsuspend(td, sigmask)); 745} 746 747int 748linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 749{ 750 stack_t ss, oss; 751 l_stack_t lss; 752 int error; 753 754#ifdef DEBUG 755 if (ldebug(sigaltstack)) 756 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 757#endif 758 759 if (uap->uss != NULL) { 760 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 761 if (error) 762 return (error); 763 764 ss.ss_sp = lss.ss_sp; 765 ss.ss_size = lss.ss_size; 766 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 767 } 768 error = kern_sigaltstack(td, (uap->uoss != NULL) ? &oss : NULL, 769 (uap->uss != NULL) ? &ss : NULL); 770 if (!error && uap->uoss != NULL) { 771 lss.ss_sp = oss.ss_sp; 772 lss.ss_size = oss.ss_size; 773 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 774 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 775 } 776 777 return (error); 778} 779