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, "%p"), 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 FIRST_THREAD_IN_PROC(p2)->td_frame->tf_esp = 352 (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(FIRST_THREAD_IN_PROC(p2)); 366 mtx_unlock_spin(&sched_lock); 367 PROC_UNLOCK(p2); 368 } 369 mtx_unlock(&Giant); 370 371 return (error); 372 } 373 374 /* XXX move */ 375 struct 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) 386 387 int 388 linux_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 } 508 509 int 510 linux_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 } 537 538 int 539 linux_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 } 554 555 int 556 linux_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)) != 0) 563 return (error); 564 if ((error = securelevel_gt(td->td_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 } 570 571 int 572 linux_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 } 640 641 int 642 linux_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 */ 686 int 687 linux_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 } 706 707 int 708 linux_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 } 736 737 int 738 linux_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 } 757 758 int 759 linux_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