linux_machdep.c revision 84811
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 84811 2001-10-11 17:52:20Z jhb $ 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/sysproto.h> 40#include <sys/unistd.h> 41 42#include <machine/frame.h> 43#include <machine/psl.h> 44#include <machine/segments.h> 45#include <machine/sysarch.h> 46 47#include <vm/vm.h> 48#include <sys/lock.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, "%x"), 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, &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 p2->p_thread.td_frame->tf_esp = (unsigned int)args->stack; 353 354#ifdef DEBUG 355 if (ldebug(clone)) 356 printf(LMSG("clone: successful rfork to %ld"), 357 (long)p2->p_pid); 358#endif 359 360 /* 361 * Make this runnable after we are finished with it. 362 */ 363 mtx_lock_spin(&sched_lock); 364 p2->p_stat = SRUN; 365 setrunqueue(&p2->p_thread); 366 mtx_unlock_spin(&sched_lock); 367 PROC_UNLOCK(p2); 368 } 369 mtx_unlock(&Giant); 370 371 return (error); 372} 373 374/* XXX move */ 375struct l_mmap_argv { 376 l_caddr_t addr; 377 l_int len; 378 l_int prot; 379 l_int flags; 380 l_int fd; 381 l_int pos; 382}; 383 384#define STACK_SIZE (2 * 1024 * 1024) 385#define GUARD_SIZE (4 * PAGE_SIZE) 386 387int 388linux_mmap(struct thread *td, struct linux_mmap_args *args) 389{ 390 struct proc *p = td->td_proc; 391 struct mmap_args /* { 392 caddr_t addr; 393 size_t len; 394 int prot; 395 int flags; 396 int fd; 397 long pad; 398 off_t pos; 399 } */ bsd_args; 400 int error; 401 struct l_mmap_argv linux_args; 402 403 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 404 if (error) 405 return (error); 406 407#ifdef DEBUG 408 if (ldebug(mmap)) 409 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 410 (void *)linux_args.addr, linux_args.len, linux_args.prot, 411 linux_args.flags, linux_args.fd, linux_args.pos); 412#endif 413 414 bsd_args.flags = 0; 415 if (linux_args.flags & LINUX_MAP_SHARED) 416 bsd_args.flags |= MAP_SHARED; 417 if (linux_args.flags & LINUX_MAP_PRIVATE) 418 bsd_args.flags |= MAP_PRIVATE; 419 if (linux_args.flags & LINUX_MAP_FIXED) 420 bsd_args.flags |= MAP_FIXED; 421 if (linux_args.flags & LINUX_MAP_ANON) 422 bsd_args.flags |= MAP_ANON; 423 else 424 bsd_args.flags |= MAP_NOSYNC; 425 if (linux_args.flags & LINUX_MAP_GROWSDOWN) { 426 bsd_args.flags |= MAP_STACK; 427 428 /* The linux MAP_GROWSDOWN option does not limit auto 429 * growth of the region. Linux mmap with this option 430 * takes as addr the inital BOS, and as len, the initial 431 * region size. It can then grow down from addr without 432 * limit. However, linux threads has an implicit internal 433 * limit to stack size of STACK_SIZE. Its just not 434 * enforced explicitly in linux. But, here we impose 435 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 436 * region, since we can do this with our mmap. 437 * 438 * Our mmap with MAP_STACK takes addr as the maximum 439 * downsize limit on BOS, and as len the max size of 440 * the region. It them maps the top SGROWSIZ bytes, 441 * and autgrows the region down, up to the limit 442 * in addr. 443 * 444 * If we don't use the MAP_STACK option, the effect 445 * of this code is to allocate a stack region of a 446 * fixed size of (STACK_SIZE - GUARD_SIZE). 447 */ 448 449 /* This gives us TOS */ 450 bsd_args.addr = linux_args.addr + linux_args.len; 451 452 if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) { 453 /* Some linux apps will attempt to mmap 454 * thread stacks near the top of their 455 * address space. If their TOS is greater 456 * than vm_maxsaddr, vm_map_growstack() 457 * will confuse the thread stack with the 458 * process stack and deliver a SEGV if they 459 * attempt to grow the thread stack past their 460 * current stacksize rlimit. To avoid this, 461 * adjust vm_maxsaddr upwards to reflect 462 * the current stacksize rlimit rather 463 * than the maximum possible stacksize. 464 * It would be better to adjust the 465 * mmap'ed region, but some apps do not check 466 * mmap's return value. 467 */ 468 mtx_assert(&Giant, MA_OWNED); 469 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK - 470 p->p_rlimit[RLIMIT_STACK].rlim_cur; 471 } 472 473 /* This gives us our maximum stack size */ 474 if (linux_args.len > STACK_SIZE - GUARD_SIZE) 475 bsd_args.len = linux_args.len; 476 else 477 bsd_args.len = STACK_SIZE - GUARD_SIZE; 478 479 /* This gives us a new BOS. If we're using VM_STACK, then 480 * mmap will just map the top SGROWSIZ bytes, and let 481 * the stack grow down to the limit at BOS. If we're 482 * not using VM_STACK we map the full stack, since we 483 * don't have a way to autogrow it. 484 */ 485 bsd_args.addr -= bsd_args.len; 486 } else { 487 bsd_args.addr = linux_args.addr; 488 bsd_args.len = linux_args.len; 489 } 490 491 bsd_args.prot = linux_args.prot | PROT_READ; /* always required */ 492 if (linux_args.flags & LINUX_MAP_ANON) 493 bsd_args.fd = -1; 494 else 495 bsd_args.fd = linux_args.fd; 496 bsd_args.pos = linux_args.pos; 497 bsd_args.pad = 0; 498 499#ifdef DEBUG 500 if (ldebug(mmap)) 501 printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", 502 (void *)bsd_args.addr, bsd_args.len, bsd_args.prot, 503 bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); 504#endif 505 506 return (mmap(td, &bsd_args)); 507} 508 509int 510linux_pipe(struct thread *td, struct linux_pipe_args *args) 511{ 512 int error; 513 int reg_edx; 514 515#ifdef DEBUG 516 if (ldebug(pipe)) 517 printf(ARGS(pipe, "*")); 518#endif 519 520 reg_edx = td->td_retval[1]; 521 error = pipe(td, 0); 522 if (error) { 523 td->td_retval[1] = reg_edx; 524 return (error); 525 } 526 527 error = copyout(td->td_retval, args->pipefds, 2*sizeof(int)); 528 if (error) { 529 td->td_retval[1] = reg_edx; 530 return (error); 531 } 532 533 td->td_retval[1] = reg_edx; 534 td->td_retval[0] = 0; 535 return (0); 536} 537 538int 539linux_ioperm(struct thread *td, struct linux_ioperm_args *args) 540{ 541 struct sysarch_args sa; 542 struct i386_ioperm_args *iia; 543 caddr_t sg; 544 545 sg = stackgap_init(); 546 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); 547 iia->start = args->start; 548 iia->length = args->length; 549 iia->enable = args->enable; 550 sa.op = I386_SET_IOPERM; 551 sa.parms = (char *)iia; 552 return (sysarch(td, &sa)); 553} 554 555int 556linux_iopl(struct thread *td, struct linux_iopl_args *args) 557{ 558 int error; 559 560 if (args->level < 0 || args->level > 3) 561 return (EINVAL); 562 if ((error = suser_td(td)) != 0) 563 return (error); 564 if ((error = securelevel_gt(td->td_proc->p_ucred, 0)) != 0) 565 return (error); 566 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 567 (args->level * (PSL_IOPL / 3)); 568 return (0); 569} 570 571int 572linux_modify_ldt(td, uap) 573 struct thread *td; 574 struct linux_modify_ldt_args *uap; 575{ 576 int error; 577 caddr_t sg; 578 struct sysarch_args args; 579 struct i386_ldt_args *ldt; 580 struct l_descriptor ld; 581 union descriptor *desc; 582 583 sg = stackgap_init(); 584 585 if (uap->ptr == NULL) 586 return (EINVAL); 587 588 switch (uap->func) { 589 case 0x00: /* read_ldt */ 590 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 591 ldt->start = 0; 592 ldt->descs = uap->ptr; 593 ldt->num = uap->bytecount / sizeof(union descriptor); 594 args.op = I386_GET_LDT; 595 args.parms = (char*)ldt; 596 error = sysarch(td, &args); 597 td->td_retval[0] *= sizeof(union descriptor); 598 break; 599 case 0x01: /* write_ldt */ 600 case 0x11: /* write_ldt */ 601 if (uap->bytecount != sizeof(ld)) 602 return (EINVAL); 603 604 error = copyin(uap->ptr, &ld, sizeof(ld)); 605 if (error) 606 return (error); 607 608 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 609 desc = stackgap_alloc(&sg, sizeof(*desc)); 610 ldt->start = ld.entry_number; 611 ldt->descs = desc; 612 ldt->num = 1; 613 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); 614 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 615 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); 616 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 617 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 618 (ld.contents << 2); 619 desc->sd.sd_dpl = 3; 620 desc->sd.sd_p = (ld.seg_not_present ^ 1); 621 desc->sd.sd_xx = 0; 622 desc->sd.sd_def32 = ld.seg_32bit; 623 desc->sd.sd_gran = ld.limit_in_pages; 624 args.op = I386_SET_LDT; 625 args.parms = (char*)ldt; 626 error = sysarch(td, &args); 627 break; 628 default: 629 error = EINVAL; 630 break; 631 } 632 633 if (error == EOPNOTSUPP) { 634 printf("linux: modify_ldt needs kernel option USER_LDT\n"); 635 error = ENOSYS; 636 } 637 638 return (error); 639} 640 641int 642linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 643{ 644 l_osigaction_t osa; 645 l_sigaction_t act, oact; 646 int error; 647 648#ifdef DEBUG 649 if (ldebug(sigaction)) 650 printf(ARGS(sigaction, "%d, %p, %p"), 651 args->sig, (void *)args->nsa, (void *)args->osa); 652#endif 653 654 if (args->nsa != NULL) { 655 error = copyin((caddr_t)args->nsa, &osa, 656 sizeof(l_osigaction_t)); 657 if (error) 658 return (error); 659 act.lsa_handler = osa.lsa_handler; 660 act.lsa_flags = osa.lsa_flags; 661 act.lsa_restorer = osa.lsa_restorer; 662 LINUX_SIGEMPTYSET(act.lsa_mask); 663 act.lsa_mask.__bits[0] = osa.lsa_mask; 664 } 665 666 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 667 args->osa ? &oact : NULL); 668 669 if (args->osa != NULL && !error) { 670 osa.lsa_handler = oact.lsa_handler; 671 osa.lsa_flags = oact.lsa_flags; 672 osa.lsa_restorer = oact.lsa_restorer; 673 osa.lsa_mask = oact.lsa_mask.__bits[0]; 674 error = copyout(&osa, (caddr_t)args->osa, 675 sizeof(l_osigaction_t)); 676 } 677 678 return (error); 679} 680 681/* 682 * Linux has two extra args, restart and oldmask. We dont use these, 683 * but it seems that "restart" is actually a context pointer that 684 * enables the signal to happen with a different register set. 685 */ 686int 687linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 688{ 689 struct sigsuspend_args bsd; 690 sigset_t *sigmask; 691 l_sigset_t mask; 692 caddr_t sg = stackgap_init(); 693 694#ifdef DEBUG 695 if (ldebug(sigsuspend)) 696 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 697#endif 698 699 sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); 700 LINUX_SIGEMPTYSET(mask); 701 mask.__bits[0] = args->mask; 702 linux_to_bsd_sigset(&mask, sigmask); 703 bsd.sigmask = sigmask; 704 return (sigsuspend(td, &bsd)); 705} 706 707int 708linux_rt_sigsuspend(td, uap) 709 struct thread *td; 710 struct linux_rt_sigsuspend_args *uap; 711{ 712 l_sigset_t lmask; 713 sigset_t *bmask; 714 struct sigsuspend_args bsd; 715 caddr_t sg = stackgap_init(); 716 int error; 717 718#ifdef DEBUG 719 if (ldebug(rt_sigsuspend)) 720 printf(ARGS(rt_sigsuspend, "%p, %d"), 721 (void *)uap->newset, uap->sigsetsize); 722#endif 723 724 if (uap->sigsetsize != sizeof(l_sigset_t)) 725 return (EINVAL); 726 727 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 728 if (error) 729 return (error); 730 731 bmask = stackgap_alloc(&sg, sizeof(sigset_t)); 732 linux_to_bsd_sigset(&lmask, bmask); 733 bsd.sigmask = bmask; 734 return (sigsuspend(td, &bsd)); 735} 736 737int 738linux_pause(struct thread *td, struct linux_pause_args *args) 739{ 740 struct proc *p = td->td_proc; 741 struct sigsuspend_args bsd; 742 sigset_t *sigmask; 743 caddr_t sg = stackgap_init(); 744 745#ifdef DEBUG 746 if (ldebug(pause)) 747 printf(ARGS(pause, "")); 748#endif 749 750 sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); 751 PROC_LOCK(p); 752 *sigmask = p->p_sigmask; 753 PROC_UNLOCK(p); 754 bsd.sigmask = sigmask; 755 return (sigsuspend(td, &bsd)); 756} 757 758int 759linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 760{ 761 struct sigaltstack_args bsd; 762 stack_t *ss, *oss; 763 l_stack_t lss; 764 int error; 765 caddr_t sg = stackgap_init(); 766 767#ifdef DEBUG 768 if (ldebug(sigaltstack)) 769 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 770#endif 771 772 if (uap->uss == NULL) { 773 ss = NULL; 774 } else { 775 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 776 if (error) 777 return (error); 778 779 ss = stackgap_alloc(&sg, sizeof(stack_t)); 780 ss->ss_sp = lss.ss_sp; 781 ss->ss_size = lss.ss_size; 782 ss->ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 783 } 784 oss = (uap->uoss != NULL) 785 ? stackgap_alloc(&sg, sizeof(stack_t)) 786 : NULL; 787 788 bsd.ss = ss; 789 bsd.oss = oss; 790 error = sigaltstack(td, &bsd); 791 792 if (!error && oss != NULL) { 793 lss.ss_sp = oss->ss_sp; 794 lss.ss_size = oss->ss_size; 795 lss.ss_flags = bsd_to_linux_sigaltstack(oss->ss_flags); 796 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 797 } 798 799 return (error); 800} 801