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 * $FreeBSD$ 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 <vm/pmap.h> 49 #include <vm/vm_map.h> 50 51 #include <i386/linux/linux.h> 52 #include <i386/linux/linux_proto.h> 53 #include <compat/linux/linux_ipc.h> 54 #include <compat/linux/linux_signal.h> 55 #include <compat/linux/linux_util.h> 56 57 struct l_descriptor { 58 l_uint entry_number; 59 l_ulong base_addr; 60 l_uint limit; 61 l_uint seg_32bit:1; 62 l_uint contents:2; 63 l_uint read_exec_only:1; 64 l_uint limit_in_pages:1; 65 l_uint seg_not_present:1; 66 l_uint useable:1; 67 }; 68 69 struct l_old_select_argv { 70 l_int nfds; 71 l_fd_set *readfds; 72 l_fd_set *writefds; 73 l_fd_set *exceptfds; 74 struct l_timeval *timeout; 75 }; 76 77 int 78 linux_to_bsd_sigaltstack(int lsa) 79 { 80 int bsa = 0; 81 82 if (lsa & LINUX_SS_DISABLE) 83 bsa |= SS_DISABLE; 84 if (lsa & LINUX_SS_ONSTACK) 85 bsa |= SS_ONSTACK; 86 return (bsa); 87 } 88 89 int 90 bsd_to_linux_sigaltstack(int bsa) 91 { 92 int lsa = 0; 93 94 if (bsa & SS_DISABLE) 95 lsa |= LINUX_SS_DISABLE; 96 if (bsa & SS_ONSTACK) 97 lsa |= LINUX_SS_ONSTACK; 98 return (lsa); 99 } 100 101 int 102 linux_execve(struct thread *td, struct linux_execve_args *args) 103 { 104 struct execve_args bsd; 105 caddr_t sg; 106 107 sg = stackgap_init(); 108 CHECKALTEXIST(td, &sg, args->path); 109 110 #ifdef DEBUG 111 if (ldebug(execve)) 112 printf(ARGS(execve, "%s"), args->path); 113 #endif 114 115 bsd.fname = args->path; 116 bsd.argv = args->argp; 117 bsd.envv = args->envp; 118 return (execve(td, &bsd)); 119 } 120 121 struct l_ipc_kludge { 122 struct l_msgbuf *msgp; 123 l_long msgtyp; 124 }; 125 126 int 127 linux_ipc(struct thread *td, struct linux_ipc_args *args) 128 { 129 130 switch (args->what & 0xFFFF) { 131 case LINUX_SEMOP: { 132 struct linux_semop_args a; 133 134 a.semid = args->arg1; 135 a.tsops = args->ptr; 136 a.nsops = args->arg2; 137 return (linux_semop(td, &a)); 138 } 139 case LINUX_SEMGET: { 140 struct linux_semget_args a; 141 142 a.key = args->arg1; 143 a.nsems = args->arg2; 144 a.semflg = args->arg3; 145 return (linux_semget(td, &a)); 146 } 147 case LINUX_SEMCTL: { 148 struct linux_semctl_args a; 149 int error; 150 151 a.semid = args->arg1; 152 a.semnum = args->arg2; 153 a.cmd = args->arg3; 154 error = copyin((caddr_t)args->ptr, &a.arg, sizeof(a.arg)); 155 if (error) 156 return (error); 157 return (linux_semctl(td, &a)); 158 } 159 case LINUX_MSGSND: { 160 struct linux_msgsnd_args a; 161 162 a.msqid = args->arg1; 163 a.msgp = args->ptr; 164 a.msgsz = args->arg2; 165 a.msgflg = args->arg3; 166 return (linux_msgsnd(td, &a)); 167 } 168 case LINUX_MSGRCV: { 169 struct linux_msgrcv_args a; 170 171 a.msqid = args->arg1; 172 a.msgsz = args->arg2; 173 a.msgflg = args->arg3; 174 if ((args->what >> 16) == 0) { 175 struct l_ipc_kludge tmp; 176 int error; 177 178 if (args->ptr == NULL) 179 return (EINVAL); 180 error = copyin((caddr_t)args->ptr, &tmp, sizeof(tmp)); 181 if (error) 182 return (error); 183 a.msgp = tmp.msgp; 184 a.msgtyp = tmp.msgtyp; 185 } else { 186 a.msgp = args->ptr; 187 a.msgtyp = args->arg5; 188 } 189 return (linux_msgrcv(td, &a)); 190 } 191 case LINUX_MSGGET: { 192 struct linux_msgget_args a; 193 194 a.key = args->arg1; 195 a.msgflg = args->arg2; 196 return (linux_msgget(td, &a)); 197 } 198 case LINUX_MSGCTL: { 199 struct linux_msgctl_args a; 200 201 a.msqid = args->arg1; 202 a.cmd = args->arg2; 203 a.buf = args->ptr; 204 return (linux_msgctl(td, &a)); 205 } 206 case LINUX_SHMAT: { 207 struct linux_shmat_args a; 208 209 a.shmid = args->arg1; 210 a.shmaddr = args->ptr; 211 a.shmflg = args->arg2; 212 a.raddr = (l_ulong *)args->arg3; 213 return (linux_shmat(td, &a)); 214 } 215 case LINUX_SHMDT: { 216 struct linux_shmdt_args a; 217 218 a.shmaddr = args->ptr; 219 return (linux_shmdt(td, &a)); 220 } 221 case LINUX_SHMGET: { 222 struct linux_shmget_args a; 223 224 a.key = args->arg1; 225 a.size = args->arg2; 226 a.shmflg = args->arg3; 227 return (linux_shmget(td, &a)); 228 } 229 case LINUX_SHMCTL: { 230 struct linux_shmctl_args a; 231 232 a.shmid = args->arg1; 233 a.cmd = args->arg2; 234 a.buf = args->ptr; 235 return (linux_shmctl(td, &a)); 236 } 237 default: 238 break; 239 } 240 241 return (EINVAL); 242 } 243 244 int 245 linux_old_select(struct thread *td, struct linux_old_select_args *args) 246 { 247 struct l_old_select_argv linux_args; 248 struct linux_select_args newsel; 249 int error; 250 251 #ifdef DEBUG 252 if (ldebug(old_select)) 253 printf(ARGS(old_select, "%x"), args->ptr); 254 #endif 255 256 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 257 if (error) 258 return (error); 259 260 newsel.nfds = linux_args.nfds; 261 newsel.readfds = linux_args.readfds; 262 newsel.writefds = linux_args.writefds; 263 newsel.exceptfds = linux_args.exceptfds; 264 newsel.timeout = linux_args.timeout; 265 return (linux_select(td, &newsel)); 266 } 267 268 int 269 linux_fork(struct thread *td, struct linux_fork_args *args) 270 { 271 int error; 272 273 #ifdef DEBUG 274 if (ldebug(fork)) 275 printf(ARGS(fork, "")); 276 #endif 277 278 if ((error = fork(td, (struct fork_args *)args)) != 0) 279 return (error); 280 281 if (td->td_retval[1] == 1) 282 td->td_retval[0] = 0; 283 return (0); 284 } 285 286 int 287 linux_vfork(struct thread *td, struct linux_vfork_args *args) 288 { 289 int error; 290 291 #ifdef DEBUG 292 if (ldebug(vfork)) 293 printf(ARGS(vfork, "")); 294 #endif 295 296 if ((error = vfork(td, (struct vfork_args *)args)) != 0) 297 return (error); 298 /* Are we the child? */ 299 if (td->td_retval[1] == 1) 300 td->td_retval[0] = 0; 301 return (0); 302 } 303 304 #define CLONE_VM 0x100 305 #define CLONE_FS 0x200 306 #define CLONE_FILES 0x400 307 #define CLONE_SIGHAND 0x800 308 #define CLONE_PID 0x1000 309 310 int 311 linux_clone(struct thread *td, struct linux_clone_args *args) 312 { 313 int error, ff = RFPROC | RFSTOPPED; 314 struct proc *p2; 315 int exit_signal; 316 317 #ifdef DEBUG 318 if (ldebug(clone)) { 319 printf(ARGS(clone, "flags %x, stack %x"), 320 (unsigned int)args->flags, (unsigned int)args->stack); 321 if (args->flags & CLONE_PID) 322 printf(LMSG("CLONE_PID not yet supported")); 323 } 324 #endif 325 326 if (!args->stack) 327 return (EINVAL); 328 329 exit_signal = args->flags & 0x000000ff; 330 if (exit_signal >= LINUX_NSIG) 331 return (EINVAL); 332 333 if (exit_signal <= LINUX_SIGTBLSZ) 334 exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)]; 335 336 if (args->flags & CLONE_VM) 337 ff |= RFMEM; 338 if (args->flags & CLONE_SIGHAND) 339 ff |= RFSIGSHARE; 340 if (!(args->flags & CLONE_FILES)) 341 ff |= RFFDG; 342 343 mtx_lock(&Giant); 344 error = fork1(td, ff, &p2); 345 if (error == 0) { 346 td->td_retval[0] = p2->p_pid; 347 td->td_retval[1] = 0; 348 349 PROC_LOCK(p2); 350 p2->p_sigparent = exit_signal; 351 p2->p_thread.td_frame->tf_esp = (unsigned int)args->stack; 352 353 #ifdef DEBUG 354 if (ldebug(clone)) 355 printf(LMSG("clone: successful rfork to %ld"), 356 (long)p2->p_pid); 357 #endif 358 359 /* 360 * Make this runnable after we are finished with it. 361 */ 362 mtx_lock_spin(&sched_lock); 363 p2->p_stat = SRUN; 364 setrunqueue(&p2->p_thread); 365 mtx_unlock_spin(&sched_lock); 366 PROC_UNLOCK(p2); 367 } 368 mtx_unlock(&Giant); 369 370 return (error); 371 } 372 373 /* XXX move */ 374 struct l_mmap_argv { 375 l_caddr_t addr; 376 l_int len; 377 l_int prot; 378 l_int flags; 379 l_int fd; 380 l_int pos; 381 }; 382 383 #define STACK_SIZE (2 * 1024 * 1024) 384 #define GUARD_SIZE (4 * PAGE_SIZE) 385 386 int 387 linux_mmap(struct thread *td, struct linux_mmap_args *args) 388 { 389 struct proc *p = td->td_proc; 390 struct mmap_args /* { 391 caddr_t addr; 392 size_t len; 393 int prot; 394 int flags; 395 int fd; 396 long pad; 397 off_t pos; 398 } */ bsd_args; 399 int error; 400 struct l_mmap_argv linux_args; 401 402 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args)); 403 if (error) 404 return (error); 405 406 #ifdef DEBUG 407 if (ldebug(mmap)) 408 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"), 409 (void *)linux_args.addr, linux_args.len, linux_args.prot, 410 linux_args.flags, linux_args.fd, linux_args.pos); 411 #endif 412 413 bsd_args.flags = 0; 414 if (linux_args.flags & LINUX_MAP_SHARED) 415 bsd_args.flags |= MAP_SHARED; 416 if (linux_args.flags & LINUX_MAP_PRIVATE) 417 bsd_args.flags |= MAP_PRIVATE; 418 if (linux_args.flags & LINUX_MAP_FIXED) 419 bsd_args.flags |= MAP_FIXED; 420 if (linux_args.flags & LINUX_MAP_ANON) 421 bsd_args.flags |= MAP_ANON; 422 else 423 bsd_args.flags |= MAP_NOSYNC; 424 if (linux_args.flags & LINUX_MAP_GROWSDOWN) { 425 bsd_args.flags |= MAP_STACK; 426 427 /* The linux MAP_GROWSDOWN option does not limit auto 428 * growth of the region. Linux mmap with this option 429 * takes as addr the inital BOS, and as len, the initial 430 * region size. It can then grow down from addr without 431 * limit. However, linux threads has an implicit internal 432 * limit to stack size of STACK_SIZE. Its just not 433 * enforced explicitly in linux. But, here we impose 434 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack 435 * region, since we can do this with our mmap. 436 * 437 * Our mmap with MAP_STACK takes addr as the maximum 438 * downsize limit on BOS, and as len the max size of 439 * the region. It them maps the top SGROWSIZ bytes, 440 * and autgrows the region down, up to the limit 441 * in addr. 442 * 443 * If we don't use the MAP_STACK option, the effect 444 * of this code is to allocate a stack region of a 445 * fixed size of (STACK_SIZE - GUARD_SIZE). 446 */ 447 448 /* This gives us TOS */ 449 bsd_args.addr = linux_args.addr + linux_args.len; 450 451 if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) { 452 /* Some linux apps will attempt to mmap 453 * thread stacks near the top of their 454 * address space. If their TOS is greater 455 * than vm_maxsaddr, vm_map_growstack() 456 * will confuse the thread stack with the 457 * process stack and deliver a SEGV if they 458 * attempt to grow the thread stack past their 459 * current stacksize rlimit. To avoid this, 460 * adjust vm_maxsaddr upwards to reflect 461 * the current stacksize rlimit rather 462 * than the maximum possible stacksize. 463 * It would be better to adjust the 464 * mmap'ed region, but some apps do not check 465 * mmap's return value. 466 */ 467 mtx_assert(&Giant, MA_OWNED); 468 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK - 469 p->p_rlimit[RLIMIT_STACK].rlim_cur; 470 } 471 472 /* This gives us our maximum stack size */ 473 if (linux_args.len > STACK_SIZE - GUARD_SIZE) 474 bsd_args.len = linux_args.len; 475 else 476 bsd_args.len = STACK_SIZE - GUARD_SIZE; 477 478 /* This gives us a new BOS. If we're using VM_STACK, then 479 * mmap will just map the top SGROWSIZ bytes, and let 480 * the stack grow down to the limit at BOS. If we're 481 * not using VM_STACK we map the full stack, since we 482 * don't have a way to autogrow it. 483 */ 484 bsd_args.addr -= bsd_args.len; 485 } else { 486 bsd_args.addr = linux_args.addr; 487 bsd_args.len = linux_args.len; 488 } 489 490 bsd_args.prot = linux_args.prot | PROT_READ; /* always required */ 491 if (linux_args.flags & LINUX_MAP_ANON) 492 bsd_args.fd = -1; 493 else 494 bsd_args.fd = linux_args.fd; 495 bsd_args.pos = linux_args.pos; 496 bsd_args.pad = 0; 497 498 #ifdef DEBUG 499 if (ldebug(mmap)) 500 printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", 501 (void *)bsd_args.addr, bsd_args.len, bsd_args.prot, 502 bsd_args.flags, bsd_args.fd, (int)bsd_args.pos); 503 #endif 504 505 return (mmap(td, &bsd_args)); 506 } 507 508 int 509 linux_pipe(struct thread *td, struct linux_pipe_args *args) 510 { 511 int error; 512 int reg_edx; 513 514 #ifdef DEBUG 515 if (ldebug(pipe)) 516 printf(ARGS(pipe, "*")); 517 #endif 518 519 reg_edx = td->td_retval[1]; 520 error = pipe(td, 0); 521 if (error) { 522 td->td_retval[1] = reg_edx; 523 return (error); 524 } 525 526 error = copyout(td->td_retval, args->pipefds, 2*sizeof(int)); 527 if (error) { 528 td->td_retval[1] = reg_edx; 529 return (error); 530 } 531 532 td->td_retval[1] = reg_edx; 533 td->td_retval[0] = 0; 534 return (0); 535 } 536 537 int 538 linux_ioperm(struct thread *td, struct linux_ioperm_args *args) 539 { 540 struct sysarch_args sa; 541 struct i386_ioperm_args *iia; 542 caddr_t sg; 543 544 sg = stackgap_init(); 545 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); 546 iia->start = args->start; 547 iia->length = args->length; 548 iia->enable = args->enable; 549 sa.op = I386_SET_IOPERM; 550 sa.parms = (char *)iia; 551 return (sysarch(td, &sa)); 552 } 553 554 int 555 linux_iopl(struct thread *td, struct linux_iopl_args *args) 556 { 557 int error; 558 559 if (args->level < 0 || args->level > 3) 560 return (EINVAL); 561 if ((error = suser_td(td)) != 0) 562 return (error); 563 if ((error = securelevel_gt(td->td_proc->p_ucred, 0)) != 0) 564 return (error); 565 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) | 566 (args->level * (PSL_IOPL / 3)); 567 return (0); 568 } 569 570 int 571 linux_modify_ldt(td, uap) 572 struct thread *td; 573 struct linux_modify_ldt_args *uap; 574 { 575 int error; 576 caddr_t sg; 577 struct sysarch_args args; 578 struct i386_ldt_args *ldt; 579 struct l_descriptor ld; 580 union descriptor *desc; 581 582 sg = stackgap_init(); 583 584 if (uap->ptr == NULL) 585 return (EINVAL); 586 587 switch (uap->func) { 588 case 0x00: /* read_ldt */ 589 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 590 ldt->start = 0; 591 ldt->descs = uap->ptr; 592 ldt->num = uap->bytecount / sizeof(union descriptor); 593 args.op = I386_GET_LDT; 594 args.parms = (char*)ldt; 595 error = sysarch(td, &args); 596 td->td_retval[0] *= sizeof(union descriptor); 597 break; 598 case 0x01: /* write_ldt */ 599 case 0x11: /* write_ldt */ 600 if (uap->bytecount != sizeof(ld)) 601 return (EINVAL); 602 603 error = copyin(uap->ptr, &ld, sizeof(ld)); 604 if (error) 605 return (error); 606 607 ldt = stackgap_alloc(&sg, sizeof(*ldt)); 608 desc = stackgap_alloc(&sg, sizeof(*desc)); 609 ldt->start = ld.entry_number; 610 ldt->descs = desc; 611 ldt->num = 1; 612 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); 613 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; 614 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); 615 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; 616 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | 617 (ld.contents << 2); 618 desc->sd.sd_dpl = 3; 619 desc->sd.sd_p = (ld.seg_not_present ^ 1); 620 desc->sd.sd_xx = 0; 621 desc->sd.sd_def32 = ld.seg_32bit; 622 desc->sd.sd_gran = ld.limit_in_pages; 623 args.op = I386_SET_LDT; 624 args.parms = (char*)ldt; 625 error = sysarch(td, &args); 626 break; 627 default: 628 error = EINVAL; 629 break; 630 } 631 632 if (error == EOPNOTSUPP) { 633 printf("linux: modify_ldt needs kernel option USER_LDT\n"); 634 error = ENOSYS; 635 } 636 637 return (error); 638 } 639 640 int 641 linux_sigaction(struct thread *td, struct linux_sigaction_args *args) 642 { 643 l_osigaction_t osa; 644 l_sigaction_t act, oact; 645 int error; 646 647 #ifdef DEBUG 648 if (ldebug(sigaction)) 649 printf(ARGS(sigaction, "%d, %p, %p"), 650 args->sig, (void *)args->nsa, (void *)args->osa); 651 #endif 652 653 if (args->nsa != NULL) { 654 error = copyin((caddr_t)args->nsa, &osa, 655 sizeof(l_osigaction_t)); 656 if (error) 657 return (error); 658 act.lsa_handler = osa.lsa_handler; 659 act.lsa_flags = osa.lsa_flags; 660 act.lsa_restorer = osa.lsa_restorer; 661 LINUX_SIGEMPTYSET(act.lsa_mask); 662 act.lsa_mask.__bits[0] = osa.lsa_mask; 663 } 664 665 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL, 666 args->osa ? &oact : NULL); 667 668 if (args->osa != NULL && !error) { 669 osa.lsa_handler = oact.lsa_handler; 670 osa.lsa_flags = oact.lsa_flags; 671 osa.lsa_restorer = oact.lsa_restorer; 672 osa.lsa_mask = oact.lsa_mask.__bits[0]; 673 error = copyout(&osa, (caddr_t)args->osa, 674 sizeof(l_osigaction_t)); 675 } 676 677 return (error); 678 } 679 680 /* 681 * Linux has two extra args, restart and oldmask. We dont use these, 682 * but it seems that "restart" is actually a context pointer that 683 * enables the signal to happen with a different register set. 684 */ 685 int 686 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args) 687 { 688 struct sigsuspend_args bsd; 689 sigset_t *sigmask; 690 l_sigset_t mask; 691 caddr_t sg = stackgap_init(); 692 693 #ifdef DEBUG 694 if (ldebug(sigsuspend)) 695 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask); 696 #endif 697 698 sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); 699 LINUX_SIGEMPTYSET(mask); 700 mask.__bits[0] = args->mask; 701 linux_to_bsd_sigset(&mask, sigmask); 702 bsd.sigmask = sigmask; 703 return (sigsuspend(td, &bsd)); 704 } 705 706 int 707 linux_rt_sigsuspend(td, uap) 708 struct thread *td; 709 struct linux_rt_sigsuspend_args *uap; 710 { 711 l_sigset_t lmask; 712 sigset_t *bmask; 713 struct sigsuspend_args bsd; 714 caddr_t sg = stackgap_init(); 715 int error; 716 717 #ifdef DEBUG 718 if (ldebug(rt_sigsuspend)) 719 printf(ARGS(rt_sigsuspend, "%p, %d"), 720 (void *)uap->newset, uap->sigsetsize); 721 #endif 722 723 if (uap->sigsetsize != sizeof(l_sigset_t)) 724 return (EINVAL); 725 726 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t)); 727 if (error) 728 return (error); 729 730 bmask = stackgap_alloc(&sg, sizeof(sigset_t)); 731 linux_to_bsd_sigset(&lmask, bmask); 732 bsd.sigmask = bmask; 733 return (sigsuspend(td, &bsd)); 734 } 735 736 int 737 linux_pause(struct thread *td, struct linux_pause_args *args) 738 { 739 struct proc *p = td->td_proc; 740 struct sigsuspend_args bsd; 741 sigset_t *sigmask; 742 caddr_t sg = stackgap_init(); 743 744 #ifdef DEBUG 745 if (ldebug(pause)) 746 printf(ARGS(pause, "")); 747 #endif 748 749 sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); 750 PROC_LOCK(p); 751 *sigmask = p->p_sigmask; 752 PROC_UNLOCK(p); 753 bsd.sigmask = sigmask; 754 return (sigsuspend(td, &bsd)); 755 } 756 757 int 758 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) 759 { 760 struct sigaltstack_args bsd; 761 stack_t *ss, *oss; 762 l_stack_t lss; 763 int error; 764 caddr_t sg = stackgap_init(); 765 766 #ifdef DEBUG 767 if (ldebug(sigaltstack)) 768 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss); 769 #endif 770 771 if (uap->uss == NULL) { 772 ss = NULL; 773 } else { 774 error = copyin(uap->uss, &lss, sizeof(l_stack_t)); 775 if (error) 776 return (error); 777 778 ss = stackgap_alloc(&sg, sizeof(stack_t)); 779 ss->ss_sp = lss.ss_sp; 780 ss->ss_size = lss.ss_size; 781 ss->ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags); 782 } 783 oss = (uap->uoss != NULL) 784 ? stackgap_alloc(&sg, sizeof(stack_t)) 785 : NULL; 786 787 bsd.ss = ss; 788 bsd.oss = oss; 789 error = sigaltstack(td, &bsd); 790 791 if (!error && oss != NULL) { 792 lss.ss_sp = oss->ss_sp; 793 lss.ss_size = oss->ss_size; 794 lss.ss_flags = bsd_to_linux_sigaltstack(oss->ss_flags); 795 error = copyout(&lss, uap->uoss, sizeof(l_stack_t)); 796 } 797 798 return (error); 799 } 800