linux_machdep.c revision 104893
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 104893 2002-10-11 11:43:09Z sobomax $ 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 388static int linux_mmap_common(struct thread *, struct l_mmap_argv *); 389 390int 391linux_mmap2(struct thread *td, struct linux_mmap2_args *args) 392{ 393 struct l_mmap_argv linux_args; 394 395#ifdef DEBUG 396 if (ldebug(mmap2)) 397 printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"), 398 (void *)args->addr, args->len, args->prot, 399 args->flags, args->fd, args->pgoff); 400#endif 401 402 linux_args.addr = (l_caddr_t)args->addr; 403 linux_args.len = args->len; 404 linux_args.prot = args->prot; 405 linux_args.flags = args->flags; 406 linux_args.fd = args->fd; 407 linux_args.pos = args->pgoff * PAGE_SIZE; 408 409 return (linux_mmap_common(td, &linux_args)); 410} 411 412int 413linux_mmap(struct thread *td, struct linux_mmap_args *args) 414{ 415 int error; 416 struct l_mmap_argv linux_args; 417 418 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 419 if (error) 420 return (error); 421 422#ifdef DEBUG 423 if (ldebug(mmap)) 424 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 425 (void *)linux_args->addr, linux_args->len, linux_args->prot, 426 linux_args->flags, linux_args->fd, linux_args->pos); 427#endif 428 429 return (linux_mmap_common(td, &linux_args)); 430} 431 432static int 433linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args) 434{ 435 struct proc *p = td->td_proc; 436 struct mmap_args /* { 437 caddr_t addr; 438 size_t len; 439 int prot; 440 int flags; 441 int fd; 442 long pad; 443 off_t pos; 444 } */ bsd_args; 445 446 bsd_args.flags = 0; 447 if (linux_args->flags & LINUX_MAP_SHARED) 448 bsd_args.flags |= MAP_SHARED; 449 if (linux_args->flags & LINUX_MAP_PRIVATE) 450 bsd_args.flags |= MAP_PRIVATE; 451 if (linux_args->flags & LINUX_MAP_FIXED) 452 bsd_args.flags |= MAP_FIXED; 453 if (linux_args->flags & LINUX_MAP_ANON) 454 bsd_args.flags |= MAP_ANON; 455 else 456 bsd_args.flags |= MAP_NOSYNC; 457 if (linux_args->flags & LINUX_MAP_GROWSDOWN) { 458 bsd_args.flags |= MAP_STACK; 459 460 /* The linux MAP_GROWSDOWN option does not limit auto 461 * growth of the region. Linux mmap with this option 462 * takes as addr the inital BOS, and as len, the initial 463 * region size. It can then grow down from addr without 464 * limit. However, linux threads has an implicit internal 465 * limit to stack size of STACK_SIZE. Its just not 466 * enforced explicitly in linux. But, here we impose 467 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 468 * region, since we can do this with our mmap. 469 * 470 * Our mmap with MAP_STACK takes addr as the maximum 471 * downsize limit on BOS, and as len the max size of 472 * the region. It them maps the top SGROWSIZ bytes, 473 * and autgrows the region down, up to the limit 474 * in addr. 475 * 476 * If we don't use the MAP_STACK option, the effect 477 * of this code is to allocate a stack region of a 478 * fixed size of (STACK_SIZE - GUARD_SIZE). 479 */ 480 481 /* This gives us TOS */ 482 bsd_args.addr = linux_args->addr + linux_args->len; 483 484 if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) { 485 /* Some linux apps will attempt to mmap 486 * thread stacks near the top of their 487 * address space. If their TOS is greater 488 * than vm_maxsaddr, vm_map_growstack() 489 * will confuse the thread stack with the 490 * process stack and deliver a SEGV if they 491 * attempt to grow the thread stack past their 492 * current stacksize rlimit. To avoid this, 493 * adjust vm_maxsaddr upwards to reflect 494 * the current stacksize rlimit rather 495 * than the maximum possible stacksize. 496 * It would be better to adjust the 497 * mmap'ed region, but some apps do not check 498 * mmap's return value. 499 */ 500 mtx_assert(&Giant, MA_OWNED); 501 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK - 502 p->p_rlimit[RLIMIT_STACK].rlim_cur; 503 } 504 505 /* This gives us our maximum stack size */ 506 if (linux_args->len > STACK_SIZE - GUARD_SIZE) 507 bsd_args.len = linux_args->len; 508 else 509 bsd_args.len = STACK_SIZE - GUARD_SIZE; 510 511 /* This gives us a new BOS. If we're using VM_STACK, then 512 * mmap will just map the top SGROWSIZ bytes, and let 513 * the stack grow down to the limit at BOS. If we're 514 * not using VM_STACK we map the full stack, since we 515 * don't have a way to autogrow it. 516 */ 517 bsd_args.addr -= bsd_args.len; 518 } else { 519 bsd_args.addr = linux_args->addr; 520 bsd_args.len = linux_args->len; 521 } 522 523 bsd_args.prot = linux_args->prot | PROT_READ; /* always required */ 524 if (linux_args->flags & LINUX_MAP_ANON) 525 bsd_args.fd = -1; 526 else 527 bsd_args.fd = linux_args->fd; 528 bsd_args.pos = linux_args->pos; 529 bsd_args.pad = 0; 530 531#ifdef DEBUG 532 if (ldebug(mmap)) 533 printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", 534 (void *)bsd_args.addr, bsd_args.len, bsd_args.prot, 535 bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); 536#endif 537 538 return (mmap(td, &bsd_args)); 539} 540 541int 542linux_pipe(struct thread *td, struct linux_pipe_args *args) 543{ 544 int error; 545 int reg_edx; 546 547#ifdef DEBUG 548 if (ldebug(pipe)) 549 printf(ARGS(pipe, "*")); 550#endif 551 552 reg_edx = td->td_retval[1]; 553 error = pipe(td, 0); 554 if (error) { 555 td->td_retval[1] = reg_edx; 556 return (error); 557 } 558 559 error = copyout(td->td_retval, args->pipefds, 2*sizeof(int)); 560 if (error) { 561 td->td_retval[1] = reg_edx; 562 return (error); 563 } 564 565 td->td_retval[1] = reg_edx; 566 td->td_retval[0] = 0; 567 return (0); 568} 569 570int 571linux_ioperm(struct thread *td, struct linux_ioperm_args *args) 572{ 573 struct sysarch_args sa; 574 struct i386_ioperm_args *iia; 575 caddr_t sg; 576 577 sg = stackgap_init(); 578 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); 579 iia->start = args->start; 580 iia->length = args->length; 581 iia->enable = args->enable; 582 sa.op = I386_SET_IOPERM; 583 sa.parms = (char *)iia; 584 return (sysarch(td, &sa)); 585} 586 587int 588linux_iopl(struct thread *td, struct linux_iopl_args *args) 589{ 590 int error; 591 592 if (args->level < 0 || args->level > 3) 593 return (EINVAL); 594 if ((error = suser(td)) != 0) 595 return (error); 596 if ((error = securelevel_gt(td->td_ucred, 0)) != 0) 597 return (error); 598 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 599 (args->level * (PSL_IOPL / 3)); 600 return (0); 601} 602 603int 604linux_modify_ldt(td, uap) 605 struct thread *td; 606 struct linux_modify_ldt_args *uap; 607{ 608 int error; 609 caddr_t sg; 610 struct sysarch_args args; 611 struct i386_ldt_args *ldt; 612 struct l_descriptor ld; 613 union descriptor *desc; 614 615 sg = stackgap_init(); 616 617 if (uap->ptr == NULL) 618 return (EINVAL); 619 620 switch (uap->func) { 621 case 0x00: /* read_ldt */ 622 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 623 ldt->start = 0; 624 ldt->descs = uap->ptr; 625 ldt->num = uap->bytecount / sizeof(union descriptor); 626 args.op = I386_GET_LDT; 627 args.parms = (char*)ldt; 628 error = sysarch(td, &args); 629 td->td_retval[0] *= sizeof(union descriptor); 630 break; 631 case 0x01: /* write_ldt */ 632 case 0x11: /* write_ldt */ 633 if (uap->bytecount != sizeof(ld)) 634 return (EINVAL); 635 636 error = copyin(uap->ptr, &ld, sizeof(ld)); 637 if (error) 638 return (error); 639 640 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 641 desc = stackgap_alloc(&sg, sizeof(*desc)); 642 ldt->start = ld.entry_number; 643 ldt->descs = desc; 644 ldt->num = 1; 645 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); 646 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 647 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); 648 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 649 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 650 (ld.contents << 2); 651 desc->sd.sd_dpl = 3; 652 desc->sd.sd_p = (ld.seg_not_present ^ 1); 653 desc->sd.sd_xx = 0; 654 desc->sd.sd_def32 = ld.seg_32bit; 655 desc->sd.sd_gran = ld.limit_in_pages; 656 args.op = I386_SET_LDT; 657 args.parms = (char*)ldt; 658 error = sysarch(td, &args); 659 break; 660 default: 661 error = EINVAL; 662 break; 663 } 664 665 if (error == EOPNOTSUPP) { 666 printf("linux: modify_ldt needs kernel option USER_LDT\n"); 667 error = ENOSYS; 668 } 669 670 return (error); 671} 672 673int 674linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 675{ 676 l_osigaction_t osa; 677 l_sigaction_t act, oact; 678 int error; 679 680#ifdef DEBUG 681 if (ldebug(sigaction)) 682 printf(ARGS(sigaction, "%d, %p, %p"), 683 args->sig, (void *)args->nsa, (void *)args->osa); 684#endif 685 686 if (args->nsa != NULL) { 687 error = copyin((caddr_t)args->nsa, &osa, 688 sizeof(l_osigaction_t)); 689 if (error) 690 return (error); 691 act.lsa_handler = osa.lsa_handler; 692 act.lsa_flags = osa.lsa_flags; 693 act.lsa_restorer = osa.lsa_restorer; 694 LINUX_SIGEMPTYSET(act.lsa_mask); 695 act.lsa_mask.__bits[0] = osa.lsa_mask; 696 } 697 698 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 699 args->osa ? &oact : NULL); 700 701 if (args->osa != NULL && !error) { 702 osa.lsa_handler = oact.lsa_handler; 703 osa.lsa_flags = oact.lsa_flags; 704 osa.lsa_restorer = oact.lsa_restorer; 705 osa.lsa_mask = oact.lsa_mask.__bits[0]; 706 error = copyout(&osa, (caddr_t)args->osa, 707 sizeof(l_osigaction_t)); 708 } 709 710 return (error); 711} 712 713/* 714 * Linux has two extra args, restart and oldmask. We dont use these, 715 * but it seems that "restart" is actually a context pointer that 716 * enables the signal to happen with a different register set. 717 */ 718int 719linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 720{ 721 sigset_t sigmask; 722 l_sigset_t mask; 723 724#ifdef DEBUG 725 if (ldebug(sigsuspend)) 726 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 727#endif 728 729 LINUX_SIGEMPTYSET(mask); 730 mask.__bits[0] = args->mask; 731 linux_to_bsd_sigset(&mask, &sigmask); 732 return (kern_sigsuspend(td, sigmask)); 733} 734 735int 736linux_rt_sigsuspend(td, uap) 737 struct thread *td; 738 struct linux_rt_sigsuspend_args *uap; 739{ 740 l_sigset_t lmask; 741 sigset_t sigmask; 742 int error; 743 744#ifdef DEBUG 745 if (ldebug(rt_sigsuspend)) 746 printf(ARGS(rt_sigsuspend, "%p, %d"), 747 (void *)uap->newset, uap->sigsetsize); 748#endif 749 750 if (uap->sigsetsize != sizeof(l_sigset_t)) 751 return (EINVAL); 752 753 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 754 if (error) 755 return (error); 756 757 linux_to_bsd_sigset(&lmask, &sigmask); 758 return (kern_sigsuspend(td, sigmask)); 759} 760 761int 762linux_pause(struct thread *td, struct linux_pause_args *args) 763{ 764 struct proc *p = td->td_proc; 765 sigset_t sigmask; 766 767#ifdef DEBUG 768 if (ldebug(pause)) 769 printf(ARGS(pause, "")); 770#endif 771 772 PROC_LOCK(p); 773 sigmask = p->p_sigmask; 774 PROC_UNLOCK(p); 775 return (kern_sigsuspend(td, sigmask)); 776} 777 778int 779linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 780{ 781 stack_t ss, oss; 782 l_stack_t lss; 783 int error; 784 785#ifdef DEBUG 786 if (ldebug(sigaltstack)) 787 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 788#endif 789 790 if (uap->uss != NULL) { 791 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 792 if (error) 793 return (error); 794 795 ss.ss_sp = lss.ss_sp; 796 ss.ss_size = lss.ss_size; 797 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 798 } 799 error = kern_sigaltstack(td, (uap->uoss != NULL) ? &oss : NULL, 800 (uap->uss != NULL) ? &ss : NULL); 801 if (!error && uap->uoss != NULL) { 802 lss.ss_sp = oss.ss_sp; 803 lss.ss_size = oss.ss_size; 804 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags); 805 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 806 } 807 808 return (error); 809} 810 811int 812linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args) 813{ 814 struct ftruncate_args sa; 815 816#ifdef DEBUG 817 if (ldebug(ftruncate64)) 818 printf(ARGS(ftruncate64, "%d, %d"), args->fd, args->length); 819#endif 820 821 sa.fd = args->fd; 822 sa.pad = 0; 823 sa.length = args->length; 824 return ftruncate(td, &sa); 825} 826