1 /*- 2 * Copyright (c) 2002 Doug Rabson 3 * Copyright (c) 1994-1995 S�ren Schmidt 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer 11 * in this position and unchanged. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_compat.h" 34 #include "opt_mac.h" 35 36 #include <sys/param.h> 37 #include <sys/blist.h> 38 #include <sys/fcntl.h> 39 #if defined(__i386__) 40 #include <sys/imgact_aout.h> 41 #endif 42 #include <sys/jail.h> 43 #include <sys/kernel.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mman.h> 48 #include <sys/mount.h> 49 #include <sys/mutex.h> 50 #include <sys/namei.h> 51 #include <sys/priv.h> 52 #include <sys/proc.h> 53 #include <sys/reboot.h> 54 #include <sys/resourcevar.h> 55 #include <sys/sched.h> 56 #include <sys/signalvar.h> 57 #include <sys/stat.h> 58 #include <sys/syscallsubr.h> 59 #include <sys/sysctl.h> 60 #include <sys/sysproto.h> 61 #include <sys/systm.h> 62 #include <sys/time.h> 63 #include <sys/vmmeter.h> 64 #include <sys/vnode.h> 65 #include <sys/wait.h> 66 67 #include <security/mac/mac_framework.h> 68 69 #include <vm/vm.h> 70 #include <vm/pmap.h> 71 #include <vm/vm_kern.h> 72 #include <vm/vm_map.h> 73 #include <vm/vm_extern.h> 74 #include <vm/vm_object.h> 75 #include <vm/swap_pager.h> 76 77 #include <compat/linux/linux_sysproto.h> 78 #include <compat/linux/linux_emul.h> 79 #include <compat/linux/linux_misc.h> 80 81 #ifdef COMPAT_LINUX32 82 #include <machine/../linux32/linux.h> 83 #include <machine/../linux32/linux32_proto.h> 84 #else 85 #include <machine/../linux/linux.h> 86 #include <machine/../linux/linux_proto.h> 87 #endif 88 89 #include <compat/linux/linux_mib.h> 90 #include <compat/linux/linux_signal.h> 91 #include <compat/linux/linux_util.h> 92 93 #ifdef __i386__ 94 #include <machine/cputypes.h> 95 #endif 96 97 #define BSD_TO_LINUX_SIGNAL(sig) \ 98 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 99 100 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 101 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 102 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 103 RLIMIT_MEMLOCK, RLIMIT_AS 104 }; 105 106 struct l_sysinfo { 107 l_long uptime; /* Seconds since boot */ 108 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 109 #define LINUX_SYSINFO_LOADS_SCALE 65536 110 l_ulong totalram; /* Total usable main memory size */ 111 l_ulong freeram; /* Available memory size */ 112 l_ulong sharedram; /* Amount of shared memory */ 113 l_ulong bufferram; /* Memory used by buffers */ 114 l_ulong totalswap; /* Total swap space size */ 115 l_ulong freeswap; /* swap space still available */ 116 l_ushort procs; /* Number of current processes */ 117 l_ushort pads; 118 l_ulong totalbig; 119 l_ulong freebig; 120 l_uint mem_unit; 121 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */ 122 }; 123 int 124 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 125 { 126 struct l_sysinfo sysinfo; 127 vm_object_t object; 128 int i, j; 129 struct timespec ts; 130 131 getnanouptime(&ts); 132 if (ts.tv_nsec != 0) 133 ts.tv_sec++; 134 sysinfo.uptime = ts.tv_sec; 135 136 /* Use the information from the mib to get our load averages */ 137 for (i = 0; i < 3; i++) 138 sysinfo.loads[i] = averunnable.ldavg[i] * 139 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 140 141 sysinfo.totalram = physmem * PAGE_SIZE; 142 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 143 144 sysinfo.sharedram = 0; 145 mtx_lock(&vm_object_list_mtx); 146 TAILQ_FOREACH(object, &vm_object_list, object_list) 147 if (object->shadow_count > 1) 148 sysinfo.sharedram += object->resident_page_count; 149 mtx_unlock(&vm_object_list_mtx); 150 151 sysinfo.sharedram *= PAGE_SIZE; 152 sysinfo.bufferram = 0; 153 154 swap_pager_status(&i, &j); 155 sysinfo.totalswap = i * PAGE_SIZE; 156 sysinfo.freeswap = (i - j) * PAGE_SIZE; 157 158 sysinfo.procs = nprocs; 159 160 /* The following are only present in newer Linux kernels. */ 161 sysinfo.totalbig = 0; 162 sysinfo.freebig = 0; 163 sysinfo.mem_unit = 1; 164 165 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 166 } 167 168 int 169 linux_alarm(struct thread *td, struct linux_alarm_args *args) 170 { 171 struct itimerval it, old_it; 172 int error; 173 174 #ifdef DEBUG 175 if (ldebug(alarm)) 176 printf(ARGS(alarm, "%u"), args->secs); 177 #endif 178 179 if (args->secs > 100000000) 180 return (EINVAL); 181 182 it.it_value.tv_sec = (long)args->secs; 183 it.it_value.tv_usec = 0; 184 it.it_interval.tv_sec = 0; 185 it.it_interval.tv_usec = 0; 186 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it); 187 if (error) 188 return (error); 189 if (timevalisset(&old_it.it_value)) { 190 if (old_it.it_value.tv_usec != 0) 191 old_it.it_value.tv_sec++; 192 td->td_retval[0] = old_it.it_value.tv_sec; 193 } 194 return (0); 195 } 196 197 int 198 linux_brk(struct thread *td, struct linux_brk_args *args) 199 { 200 struct vmspace *vm = td->td_proc->p_vmspace; 201 vm_offset_t new, old; 202 struct obreak_args /* { 203 char * nsize; 204 } */ tmp; 205 206 #ifdef DEBUG 207 if (ldebug(brk)) 208 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend); 209 #endif 210 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 211 new = (vm_offset_t)args->dsend; 212 tmp.nsize = (char *)new; 213 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 214 td->td_retval[0] = (long)new; 215 else 216 td->td_retval[0] = (long)old; 217 218 return 0; 219 } 220 221 #if defined(__i386__) 222 /* XXX: what about amd64/linux32? */ 223 224 int 225 linux_uselib(struct thread *td, struct linux_uselib_args *args) 226 { 227 struct nameidata ni; 228 struct vnode *vp; 229 struct exec *a_out; 230 struct vattr attr; 231 vm_offset_t vmaddr; 232 unsigned long file_offset; 233 vm_offset_t buffer; 234 unsigned long bss_size; 235 char *library; 236 int error; 237 int locked, vfslocked; 238 239 LCONVPATHEXIST(td, args->library, &library); 240 241 #ifdef DEBUG 242 if (ldebug(uselib)) 243 printf(ARGS(uselib, "%s"), library); 244 #endif 245 246 a_out = NULL; 247 vfslocked = 0; 248 locked = 0; 249 vp = NULL; 250 251 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1, 252 UIO_SYSSPACE, library, td); 253 error = namei(&ni); 254 LFREEPATH(library); 255 if (error) 256 goto cleanup; 257 258 vp = ni.ni_vp; 259 vfslocked = NDHASGIANT(&ni); 260 NDFREE(&ni, NDF_ONLY_PNBUF); 261 262 /* 263 * From here on down, we have a locked vnode that must be unlocked. 264 * XXX: The code below largely duplicates exec_check_permissions(). 265 */ 266 locked = 1; 267 268 /* Writable? */ 269 if (vp->v_writecount) { 270 error = ETXTBSY; 271 goto cleanup; 272 } 273 274 /* Executable? */ 275 error = VOP_GETATTR(vp, &attr, td->td_ucred, td); 276 if (error) 277 goto cleanup; 278 279 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 280 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 281 /* EACCESS is what exec(2) returns. */ 282 error = ENOEXEC; 283 goto cleanup; 284 } 285 286 /* Sensible size? */ 287 if (attr.va_size == 0) { 288 error = ENOEXEC; 289 goto cleanup; 290 } 291 292 /* Can we access it? */ 293 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 294 if (error) 295 goto cleanup; 296 297 /* 298 * XXX: This should use vn_open() so that it is properly authorized, 299 * and to reduce code redundancy all over the place here. 300 * XXX: Not really, it duplicates far more of exec_check_permissions() 301 * than vn_open(). 302 */ 303 #ifdef MAC 304 error = mac_check_vnode_open(td->td_ucred, vp, FREAD); 305 if (error) 306 goto cleanup; 307 #endif 308 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL); 309 if (error) 310 goto cleanup; 311 312 /* Pull in executable header into kernel_map */ 313 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 314 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0); 315 if (error) 316 goto cleanup; 317 318 /* Is it a Linux binary ? */ 319 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 320 error = ENOEXEC; 321 goto cleanup; 322 } 323 324 /* 325 * While we are here, we should REALLY do some more checks 326 */ 327 328 /* Set file/virtual offset based on a.out variant. */ 329 switch ((int)(a_out->a_magic & 0xffff)) { 330 case 0413: /* ZMAGIC */ 331 file_offset = 1024; 332 break; 333 case 0314: /* QMAGIC */ 334 file_offset = 0; 335 break; 336 default: 337 error = ENOEXEC; 338 goto cleanup; 339 } 340 341 bss_size = round_page(a_out->a_bss); 342 343 /* Check various fields in header for validity/bounds. */ 344 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 345 error = ENOEXEC; 346 goto cleanup; 347 } 348 349 /* text + data can't exceed file size */ 350 if (a_out->a_data + a_out->a_text > attr.va_size) { 351 error = EFAULT; 352 goto cleanup; 353 } 354 355 /* 356 * text/data/bss must not exceed limits 357 * XXX - this is not complete. it should check current usage PLUS 358 * the resources needed by this library. 359 */ 360 PROC_LOCK(td->td_proc); 361 if (a_out->a_text > maxtsiz || 362 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) { 363 PROC_UNLOCK(td->td_proc); 364 error = ENOMEM; 365 goto cleanup; 366 } 367 PROC_UNLOCK(td->td_proc); 368 369 /* 370 * Prevent more writers. 371 * XXX: Note that if any of the VM operations fail below we don't 372 * clear this flag. 373 */ 374 vp->v_vflag |= VV_TEXT; 375 376 /* 377 * Lock no longer needed 378 */ 379 locked = 0; 380 VOP_UNLOCK(vp, 0, td); 381 VFS_UNLOCK_GIANT(vfslocked); 382 383 /* 384 * Check if file_offset page aligned. Currently we cannot handle 385 * misalinged file offsets, and so we read in the entire image 386 * (what a waste). 387 */ 388 if (file_offset & PAGE_MASK) { 389 #ifdef DEBUG 390 printf("uselib: Non page aligned binary %lu\n", file_offset); 391 #endif 392 /* Map text+data read/write/execute */ 393 394 /* a_entry is the load address and is page aligned */ 395 vmaddr = trunc_page(a_out->a_entry); 396 397 /* get anon user mapping, read+write+execute */ 398 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 399 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 400 VM_PROT_ALL, 0); 401 if (error) 402 goto cleanup; 403 404 /* map file into kernel_map */ 405 error = vm_mmap(kernel_map, &buffer, 406 round_page(a_out->a_text + a_out->a_data + file_offset), 407 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 408 trunc_page(file_offset)); 409 if (error) 410 goto cleanup; 411 412 /* copy from kernel VM space to user space */ 413 error = copyout(PTRIN(buffer + file_offset), 414 (void *)vmaddr, a_out->a_text + a_out->a_data); 415 416 /* release temporary kernel space */ 417 vm_map_remove(kernel_map, buffer, buffer + 418 round_page(a_out->a_text + a_out->a_data + file_offset)); 419 420 if (error) 421 goto cleanup; 422 } else { 423 #ifdef DEBUG 424 printf("uselib: Page aligned binary %lu\n", file_offset); 425 #endif 426 /* 427 * for QMAGIC, a_entry is 20 bytes beyond the load address 428 * to skip the executable header 429 */ 430 vmaddr = trunc_page(a_out->a_entry); 431 432 /* 433 * Map it all into the process's space as a single 434 * copy-on-write "data" segment. 435 */ 436 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 437 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 438 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset); 439 if (error) 440 goto cleanup; 441 } 442 #ifdef DEBUG 443 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0], 444 ((long *)vmaddr)[1]); 445 #endif 446 if (bss_size != 0) { 447 /* Calculate BSS start address */ 448 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 449 a_out->a_data; 450 451 /* allocate some 'anon' space */ 452 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 453 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 454 if (error) 455 goto cleanup; 456 } 457 458 cleanup: 459 /* Unlock vnode if needed */ 460 if (locked) { 461 VOP_UNLOCK(vp, 0, td); 462 VFS_UNLOCK_GIANT(vfslocked); 463 } 464 465 /* Release the kernel mapping. */ 466 if (a_out) 467 vm_map_remove(kernel_map, (vm_offset_t)a_out, 468 (vm_offset_t)a_out + PAGE_SIZE); 469 470 return error; 471 } 472 473 #endif /* __i386__ */ 474 475 int 476 linux_select(struct thread *td, struct linux_select_args *args) 477 { 478 l_timeval ltv; 479 struct timeval tv0, tv1, utv, *tvp; 480 int error; 481 482 #ifdef DEBUG 483 if (ldebug(select)) 484 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 485 (void *)args->readfds, (void *)args->writefds, 486 (void *)args->exceptfds, (void *)args->timeout); 487 #endif 488 489 /* 490 * Store current time for computation of the amount of 491 * time left. 492 */ 493 if (args->timeout) { 494 if ((error = copyin(args->timeout, <v, sizeof(ltv)))) 495 goto select_out; 496 utv.tv_sec = ltv.tv_sec; 497 utv.tv_usec = ltv.tv_usec; 498 #ifdef DEBUG 499 if (ldebug(select)) 500 printf(LMSG("incoming timeout (%jd/%ld)"), 501 (intmax_t)utv.tv_sec, utv.tv_usec); 502 #endif 503 504 if (itimerfix(&utv)) { 505 /* 506 * The timeval was invalid. Convert it to something 507 * valid that will act as it does under Linux. 508 */ 509 utv.tv_sec += utv.tv_usec / 1000000; 510 utv.tv_usec %= 1000000; 511 if (utv.tv_usec < 0) { 512 utv.tv_sec -= 1; 513 utv.tv_usec += 1000000; 514 } 515 if (utv.tv_sec < 0) 516 timevalclear(&utv); 517 } 518 microtime(&tv0); 519 tvp = &utv; 520 } else 521 tvp = NULL; 522 523 error = kern_select(td, args->nfds, args->readfds, args->writefds, 524 args->exceptfds, tvp); 525 526 #ifdef DEBUG 527 if (ldebug(select)) 528 printf(LMSG("real select returns %d"), error); 529 #endif 530 if (error) { 531 /* 532 * See fs/select.c in the Linux kernel. Without this, 533 * Maelstrom doesn't work. 534 */ 535 if (error == ERESTART) 536 error = EINTR; 537 goto select_out; 538 } 539 540 if (args->timeout) { 541 if (td->td_retval[0]) { 542 /* 543 * Compute how much time was left of the timeout, 544 * by subtracting the current time and the time 545 * before we started the call, and subtracting 546 * that result from the user-supplied value. 547 */ 548 microtime(&tv1); 549 timevalsub(&tv1, &tv0); 550 timevalsub(&utv, &tv1); 551 if (utv.tv_sec < 0) 552 timevalclear(&utv); 553 } else 554 timevalclear(&utv); 555 #ifdef DEBUG 556 if (ldebug(select)) 557 printf(LMSG("outgoing timeout (%jd/%ld)"), 558 (intmax_t)utv.tv_sec, utv.tv_usec); 559 #endif 560 ltv.tv_sec = utv.tv_sec; 561 ltv.tv_usec = utv.tv_usec; 562 if ((error = copyout(<v, args->timeout, sizeof(ltv)))) 563 goto select_out; 564 } 565 566 select_out: 567 #ifdef DEBUG 568 if (ldebug(select)) 569 printf(LMSG("select_out -> %d"), error); 570 #endif 571 return error; 572 } 573 574 int 575 linux_mremap(struct thread *td, struct linux_mremap_args *args) 576 { 577 struct munmap_args /* { 578 void *addr; 579 size_t len; 580 } */ bsd_args; 581 int error = 0; 582 583 #ifdef DEBUG 584 if (ldebug(mremap)) 585 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 586 (void *)(uintptr_t)args->addr, 587 (unsigned long)args->old_len, 588 (unsigned long)args->new_len, 589 (unsigned long)args->flags); 590 #endif 591 args->new_len = round_page(args->new_len); 592 args->old_len = round_page(args->old_len); 593 594 if (args->new_len > args->old_len) { 595 td->td_retval[0] = 0; 596 return ENOMEM; 597 } 598 599 if (args->new_len < args->old_len) { 600 bsd_args.addr = 601 (caddr_t)((uintptr_t)args->addr + args->new_len); 602 bsd_args.len = args->old_len - args->new_len; 603 error = munmap(td, &bsd_args); 604 } 605 606 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 607 return error; 608 } 609 610 #define LINUX_MS_ASYNC 0x0001 611 #define LINUX_MS_INVALIDATE 0x0002 612 #define LINUX_MS_SYNC 0x0004 613 614 int 615 linux_msync(struct thread *td, struct linux_msync_args *args) 616 { 617 struct msync_args bsd_args; 618 619 bsd_args.addr = (caddr_t)(uintptr_t)args->addr; 620 bsd_args.len = (uintptr_t)args->len; 621 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 622 623 return msync(td, &bsd_args); 624 } 625 626 int 627 linux_time(struct thread *td, struct linux_time_args *args) 628 { 629 struct timeval tv; 630 l_time_t tm; 631 int error; 632 633 #ifdef DEBUG 634 if (ldebug(time)) 635 printf(ARGS(time, "*")); 636 #endif 637 638 microtime(&tv); 639 tm = tv.tv_sec; 640 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 641 return error; 642 td->td_retval[0] = tm; 643 return 0; 644 } 645 646 struct l_times_argv { 647 l_long tms_utime; 648 l_long tms_stime; 649 l_long tms_cutime; 650 l_long tms_cstime; 651 }; 652 653 #define CLK_TCK 100 /* Linux uses 100 */ 654 655 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 656 657 int 658 linux_times(struct thread *td, struct linux_times_args *args) 659 { 660 struct timeval tv, utime, stime, cutime, cstime; 661 struct l_times_argv tms; 662 struct proc *p; 663 int error; 664 665 #ifdef DEBUG 666 if (ldebug(times)) 667 printf(ARGS(times, "*")); 668 #endif 669 670 if (args->buf != NULL) { 671 p = td->td_proc; 672 PROC_LOCK(p); 673 PROC_SLOCK(p); 674 calcru(p, &utime, &stime); 675 PROC_SUNLOCK(p); 676 calccru(p, &cutime, &cstime); 677 PROC_UNLOCK(p); 678 679 tms.tms_utime = CONVTCK(utime); 680 tms.tms_stime = CONVTCK(stime); 681 682 tms.tms_cutime = CONVTCK(cutime); 683 tms.tms_cstime = CONVTCK(cstime); 684 685 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 686 return error; 687 } 688 689 microuptime(&tv); 690 td->td_retval[0] = (int)CONVTCK(tv); 691 return 0; 692 } 693 694 int 695 linux_newuname(struct thread *td, struct linux_newuname_args *args) 696 { 697 struct l_new_utsname utsname; 698 char osname[LINUX_MAX_UTSNAME]; 699 char osrelease[LINUX_MAX_UTSNAME]; 700 char *p; 701 702 #ifdef DEBUG 703 if (ldebug(newuname)) 704 printf(ARGS(newuname, "*")); 705 #endif 706 707 linux_get_osname(td, osname); 708 linux_get_osrelease(td, osrelease); 709 710 bzero(&utsname, sizeof(utsname)); 711 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 712 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 713 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 714 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 715 for (p = utsname.version; *p != '\0'; ++p) 716 if (*p == '\n') { 717 *p = '\0'; 718 break; 719 } 720 #ifdef __i386__ 721 { 722 const char *class; 723 724 switch (cpu_class) { 725 case CPUCLASS_686: 726 class = "i686"; 727 break; 728 case CPUCLASS_586: 729 class = "i586"; 730 break; 731 case CPUCLASS_486: 732 class = "i486"; 733 break; 734 default: 735 class = "i386"; 736 } 737 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME); 738 } 739 #elif defined(__amd64__) /* XXX: Linux can change 'personality'. */ 740 #ifdef COMPAT_LINUX32 741 strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME); 742 #else 743 strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME); 744 #endif /* COMPAT_LINUX32 */ 745 #else /* something other than i386 or amd64 - assume we and Linux agree */ 746 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 747 #endif /* __i386__ */ 748 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 749 750 return (copyout(&utsname, args->buf, sizeof(utsname))); 751 } 752 753 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 754 struct l_utimbuf { 755 l_time_t l_actime; 756 l_time_t l_modtime; 757 }; 758 759 int 760 linux_utime(struct thread *td, struct linux_utime_args *args) 761 { 762 struct timeval tv[2], *tvp; 763 struct l_utimbuf lut; 764 char *fname; 765 int error; 766 767 LCONVPATHEXIST(td, args->fname, &fname); 768 769 #ifdef DEBUG 770 if (ldebug(utime)) 771 printf(ARGS(utime, "%s, *"), fname); 772 #endif 773 774 if (args->times) { 775 if ((error = copyin(args->times, &lut, sizeof lut))) { 776 LFREEPATH(fname); 777 return error; 778 } 779 tv[0].tv_sec = lut.l_actime; 780 tv[0].tv_usec = 0; 781 tv[1].tv_sec = lut.l_modtime; 782 tv[1].tv_usec = 0; 783 tvp = tv; 784 } else 785 tvp = NULL; 786 787 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 788 LFREEPATH(fname); 789 return (error); 790 } 791 792 int 793 linux_utimes(struct thread *td, struct linux_utimes_args *args) 794 { 795 l_timeval ltv[2]; 796 struct timeval tv[2], *tvp = NULL; 797 char *fname; 798 int error; 799 800 LCONVPATHEXIST(td, args->fname, &fname); 801 802 #ifdef DEBUG 803 if (ldebug(utimes)) 804 printf(ARGS(utimes, "%s, *"), fname); 805 #endif 806 807 if (args->tptr != NULL) { 808 if ((error = copyin(args->tptr, ltv, sizeof ltv))) { 809 LFREEPATH(fname); 810 return (error); 811 } 812 tv[0].tv_sec = ltv[0].tv_sec; 813 tv[0].tv_usec = ltv[0].tv_usec; 814 tv[1].tv_sec = ltv[1].tv_sec; 815 tv[1].tv_usec = ltv[1].tv_usec; 816 tvp = tv; 817 } 818 819 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 820 LFREEPATH(fname); 821 return (error); 822 } 823 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 824 825 #define __WCLONE 0x80000000 826 827 int 828 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 829 { 830 int error, options, tmpstat; 831 832 #ifdef DEBUG 833 if (ldebug(waitpid)) 834 printf(ARGS(waitpid, "%d, %p, %d"), 835 args->pid, (void *)args->status, args->options); 836 #endif 837 /* 838 * this is necessary because the test in kern_wait doesn't work 839 * because we mess with the options here 840 */ 841 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE)) 842 return (EINVAL); 843 844 options = (args->options & (WNOHANG | WUNTRACED)); 845 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 846 if (args->options & __WCLONE) 847 options |= WLINUXCLONE; 848 849 error = kern_wait(td, args->pid, &tmpstat, options, NULL); 850 if (error) 851 return error; 852 853 if (args->status) { 854 tmpstat &= 0xffff; 855 if (WIFSIGNALED(tmpstat)) 856 tmpstat = (tmpstat & 0xffffff80) | 857 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 858 else if (WIFSTOPPED(tmpstat)) 859 tmpstat = (tmpstat & 0xffff00ff) | 860 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 861 return copyout(&tmpstat, args->status, sizeof(int)); 862 } 863 864 return 0; 865 } 866 867 int 868 linux_wait4(struct thread *td, struct linux_wait4_args *args) 869 { 870 int error, options, tmpstat; 871 struct rusage ru, *rup; 872 struct proc *p; 873 874 #ifdef DEBUG 875 if (ldebug(wait4)) 876 printf(ARGS(wait4, "%d, %p, %d, %p"), 877 args->pid, (void *)args->status, args->options, 878 (void *)args->rusage); 879 #endif 880 881 options = (args->options & (WNOHANG | WUNTRACED)); 882 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 883 if (args->options & __WCLONE) 884 options |= WLINUXCLONE; 885 886 if (args->rusage != NULL) 887 rup = &ru; 888 else 889 rup = NULL; 890 error = kern_wait(td, args->pid, &tmpstat, options, rup); 891 if (error) 892 return error; 893 894 p = td->td_proc; 895 PROC_LOCK(p); 896 sigqueue_delete(&p->p_sigqueue, SIGCHLD); 897 PROC_UNLOCK(p); 898 899 if (args->status) { 900 tmpstat &= 0xffff; 901 if (WIFSIGNALED(tmpstat)) 902 tmpstat = (tmpstat & 0xffffff80) | 903 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 904 else if (WIFSTOPPED(tmpstat)) 905 tmpstat = (tmpstat & 0xffff00ff) | 906 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 907 error = copyout(&tmpstat, args->status, sizeof(int)); 908 } 909 if (args->rusage != NULL && error == 0) 910 error = copyout(&ru, args->rusage, sizeof(ru)); 911 912 return (error); 913 } 914 915 int 916 linux_mknod(struct thread *td, struct linux_mknod_args *args) 917 { 918 char *path; 919 int error; 920 921 LCONVPATHCREAT(td, args->path, &path); 922 923 #ifdef DEBUG 924 if (ldebug(mknod)) 925 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 926 #endif 927 928 switch (args->mode & S_IFMT) { 929 case S_IFIFO: 930 case S_IFSOCK: 931 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 932 break; 933 934 case S_IFCHR: 935 case S_IFBLK: 936 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 937 args->dev); 938 break; 939 940 case S_IFDIR: 941 error = EPERM; 942 break; 943 944 case 0: 945 args->mode |= S_IFREG; 946 /* FALLTHROUGH */ 947 case S_IFREG: 948 error = kern_open(td, path, UIO_SYSSPACE, 949 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 950 break; 951 952 default: 953 error = EINVAL; 954 break; 955 } 956 LFREEPATH(path); 957 return (error); 958 } 959 960 /* 961 * UGH! This is just about the dumbest idea I've ever heard!! 962 */ 963 int 964 linux_personality(struct thread *td, struct linux_personality_args *args) 965 { 966 #ifdef DEBUG 967 if (ldebug(personality)) 968 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 969 #endif 970 if (args->per != 0) 971 return EINVAL; 972 973 /* Yes Jim, it's still a Linux... */ 974 td->td_retval[0] = 0; 975 return 0; 976 } 977 978 struct l_itimerval { 979 l_timeval it_interval; 980 l_timeval it_value; 981 }; 982 983 #define B2L_ITIMERVAL(bip, lip) \ 984 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 985 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 986 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 987 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 988 989 int 990 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 991 { 992 int error; 993 struct l_itimerval ls; 994 struct itimerval aitv, oitv; 995 996 #ifdef DEBUG 997 if (ldebug(setitimer)) 998 printf(ARGS(setitimer, "%p, %p"), 999 (void *)uap->itv, (void *)uap->oitv); 1000 #endif 1001 1002 if (uap->itv == NULL) { 1003 uap->itv = uap->oitv; 1004 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 1005 } 1006 1007 error = copyin(uap->itv, &ls, sizeof(ls)); 1008 if (error != 0) 1009 return (error); 1010 B2L_ITIMERVAL(&aitv, &ls); 1011 #ifdef DEBUG 1012 if (ldebug(setitimer)) { 1013 printf("setitimer: value: sec: %jd, usec: %ld\n", 1014 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 1015 printf("setitimer: interval: sec: %jd, usec: %ld\n", 1016 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 1017 } 1018 #endif 1019 error = kern_setitimer(td, uap->which, &aitv, &oitv); 1020 if (error != 0 || uap->oitv == NULL) 1021 return (error); 1022 B2L_ITIMERVAL(&ls, &oitv); 1023 1024 return (copyout(&ls, uap->oitv, sizeof(ls))); 1025 } 1026 1027 int 1028 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 1029 { 1030 int error; 1031 struct l_itimerval ls; 1032 struct itimerval aitv; 1033 1034 #ifdef DEBUG 1035 if (ldebug(getitimer)) 1036 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1037 #endif 1038 error = kern_getitimer(td, uap->which, &aitv); 1039 if (error != 0) 1040 return (error); 1041 B2L_ITIMERVAL(&ls, &aitv); 1042 return (copyout(&ls, uap->itv, sizeof(ls))); 1043 } 1044 1045 int 1046 linux_nice(struct thread *td, struct linux_nice_args *args) 1047 { 1048 struct setpriority_args bsd_args; 1049 1050 bsd_args.which = PRIO_PROCESS; 1051 bsd_args.who = 0; /* current process */ 1052 bsd_args.prio = args->inc; 1053 return setpriority(td, &bsd_args); 1054 } 1055 1056 int 1057 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1058 { 1059 struct ucred *newcred, *oldcred; 1060 l_gid_t linux_gidset[NGROUPS]; 1061 gid_t *bsd_gidset; 1062 int ngrp, error; 1063 struct proc *p; 1064 1065 ngrp = args->gidsetsize; 1066 if (ngrp < 0 || ngrp >= NGROUPS) 1067 return (EINVAL); 1068 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1069 if (error) 1070 return (error); 1071 newcred = crget(); 1072 p = td->td_proc; 1073 PROC_LOCK(p); 1074 oldcred = p->p_ucred; 1075 1076 /* 1077 * cr_groups[0] holds egid. Setting the whole set from 1078 * the supplied set will cause egid to be changed too. 1079 * Keep cr_groups[0] unchanged to prevent that. 1080 */ 1081 1082 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 1083 SUSER_ALLOWJAIL)) != 0) { 1084 PROC_UNLOCK(p); 1085 crfree(newcred); 1086 return (error); 1087 } 1088 1089 crcopy(newcred, oldcred); 1090 if (ngrp > 0) { 1091 newcred->cr_ngroups = ngrp + 1; 1092 1093 bsd_gidset = newcred->cr_groups; 1094 ngrp--; 1095 while (ngrp >= 0) { 1096 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1097 ngrp--; 1098 } 1099 } else 1100 newcred->cr_ngroups = 1; 1101 1102 setsugid(p); 1103 p->p_ucred = newcred; 1104 PROC_UNLOCK(p); 1105 crfree(oldcred); 1106 return (0); 1107 } 1108 1109 int 1110 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1111 { 1112 struct ucred *cred; 1113 l_gid_t linux_gidset[NGROUPS]; 1114 gid_t *bsd_gidset; 1115 int bsd_gidsetsz, ngrp, error; 1116 1117 cred = td->td_ucred; 1118 bsd_gidset = cred->cr_groups; 1119 bsd_gidsetsz = cred->cr_ngroups - 1; 1120 1121 /* 1122 * cr_groups[0] holds egid. Returning the whole set 1123 * here will cause a duplicate. Exclude cr_groups[0] 1124 * to prevent that. 1125 */ 1126 1127 if ((ngrp = args->gidsetsize) == 0) { 1128 td->td_retval[0] = bsd_gidsetsz; 1129 return (0); 1130 } 1131 1132 if (ngrp < bsd_gidsetsz) 1133 return (EINVAL); 1134 1135 ngrp = 0; 1136 while (ngrp < bsd_gidsetsz) { 1137 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1138 ngrp++; 1139 } 1140 1141 if ((error = copyout(linux_gidset, args->grouplist, 1142 ngrp * sizeof(l_gid_t)))) 1143 return (error); 1144 1145 td->td_retval[0] = ngrp; 1146 return (0); 1147 } 1148 1149 int 1150 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1151 { 1152 struct rlimit bsd_rlim; 1153 struct l_rlimit rlim; 1154 u_int which; 1155 int error; 1156 1157 #ifdef DEBUG 1158 if (ldebug(setrlimit)) 1159 printf(ARGS(setrlimit, "%d, %p"), 1160 args->resource, (void *)args->rlim); 1161 #endif 1162 1163 if (args->resource >= LINUX_RLIM_NLIMITS) 1164 return (EINVAL); 1165 1166 which = linux_to_bsd_resource[args->resource]; 1167 if (which == -1) 1168 return (EINVAL); 1169 1170 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1171 if (error) 1172 return (error); 1173 1174 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1175 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1176 return (kern_setrlimit(td, which, &bsd_rlim)); 1177 } 1178 1179 int 1180 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1181 { 1182 struct l_rlimit rlim; 1183 struct proc *p = td->td_proc; 1184 struct rlimit bsd_rlim; 1185 u_int which; 1186 1187 #ifdef DEBUG 1188 if (ldebug(old_getrlimit)) 1189 printf(ARGS(old_getrlimit, "%d, %p"), 1190 args->resource, (void *)args->rlim); 1191 #endif 1192 1193 if (args->resource >= LINUX_RLIM_NLIMITS) 1194 return (EINVAL); 1195 1196 which = linux_to_bsd_resource[args->resource]; 1197 if (which == -1) 1198 return (EINVAL); 1199 1200 PROC_LOCK(p); 1201 lim_rlimit(p, which, &bsd_rlim); 1202 PROC_UNLOCK(p); 1203 1204 #ifdef COMPAT_LINUX32 1205 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1206 if (rlim.rlim_cur == UINT_MAX) 1207 rlim.rlim_cur = INT_MAX; 1208 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1209 if (rlim.rlim_max == UINT_MAX) 1210 rlim.rlim_max = INT_MAX; 1211 #else 1212 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1213 if (rlim.rlim_cur == ULONG_MAX) 1214 rlim.rlim_cur = LONG_MAX; 1215 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1216 if (rlim.rlim_max == ULONG_MAX) 1217 rlim.rlim_max = LONG_MAX; 1218 #endif 1219 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1220 } 1221 1222 int 1223 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1224 { 1225 struct l_rlimit rlim; 1226 struct proc *p = td->td_proc; 1227 struct rlimit bsd_rlim; 1228 u_int which; 1229 1230 #ifdef DEBUG 1231 if (ldebug(getrlimit)) 1232 printf(ARGS(getrlimit, "%d, %p"), 1233 args->resource, (void *)args->rlim); 1234 #endif 1235 1236 if (args->resource >= LINUX_RLIM_NLIMITS) 1237 return (EINVAL); 1238 1239 which = linux_to_bsd_resource[args->resource]; 1240 if (which == -1) 1241 return (EINVAL); 1242 1243 PROC_LOCK(p); 1244 lim_rlimit(p, which, &bsd_rlim); 1245 PROC_UNLOCK(p); 1246 1247 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1248 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1249 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1250 } 1251 1252 int 1253 linux_sched_setscheduler(struct thread *td, 1254 struct linux_sched_setscheduler_args *args) 1255 { 1256 struct sched_setscheduler_args bsd; 1257 1258 #ifdef DEBUG 1259 if (ldebug(sched_setscheduler)) 1260 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1261 args->pid, args->policy, (const void *)args->param); 1262 #endif 1263 1264 switch (args->policy) { 1265 case LINUX_SCHED_OTHER: 1266 bsd.policy = SCHED_OTHER; 1267 break; 1268 case LINUX_SCHED_FIFO: 1269 bsd.policy = SCHED_FIFO; 1270 break; 1271 case LINUX_SCHED_RR: 1272 bsd.policy = SCHED_RR; 1273 break; 1274 default: 1275 return EINVAL; 1276 } 1277 1278 bsd.pid = args->pid; 1279 bsd.param = (struct sched_param *)args->param; 1280 return sched_setscheduler(td, &bsd); 1281 } 1282 1283 int 1284 linux_sched_getscheduler(struct thread *td, 1285 struct linux_sched_getscheduler_args *args) 1286 { 1287 struct sched_getscheduler_args bsd; 1288 int error; 1289 1290 #ifdef DEBUG 1291 if (ldebug(sched_getscheduler)) 1292 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1293 #endif 1294 1295 bsd.pid = args->pid; 1296 error = sched_getscheduler(td, &bsd); 1297 1298 switch (td->td_retval[0]) { 1299 case SCHED_OTHER: 1300 td->td_retval[0] = LINUX_SCHED_OTHER; 1301 break; 1302 case SCHED_FIFO: 1303 td->td_retval[0] = LINUX_SCHED_FIFO; 1304 break; 1305 case SCHED_RR: 1306 td->td_retval[0] = LINUX_SCHED_RR; 1307 break; 1308 } 1309 1310 return error; 1311 } 1312 1313 int 1314 linux_sched_get_priority_max(struct thread *td, 1315 struct linux_sched_get_priority_max_args *args) 1316 { 1317 struct sched_get_priority_max_args bsd; 1318 1319 #ifdef DEBUG 1320 if (ldebug(sched_get_priority_max)) 1321 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1322 #endif 1323 1324 switch (args->policy) { 1325 case LINUX_SCHED_OTHER: 1326 bsd.policy = SCHED_OTHER; 1327 break; 1328 case LINUX_SCHED_FIFO: 1329 bsd.policy = SCHED_FIFO; 1330 break; 1331 case LINUX_SCHED_RR: 1332 bsd.policy = SCHED_RR; 1333 break; 1334 default: 1335 return EINVAL; 1336 } 1337 return sched_get_priority_max(td, &bsd); 1338 } 1339 1340 int 1341 linux_sched_get_priority_min(struct thread *td, 1342 struct linux_sched_get_priority_min_args *args) 1343 { 1344 struct sched_get_priority_min_args bsd; 1345 1346 #ifdef DEBUG 1347 if (ldebug(sched_get_priority_min)) 1348 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1349 #endif 1350 1351 switch (args->policy) { 1352 case LINUX_SCHED_OTHER: 1353 bsd.policy = SCHED_OTHER; 1354 break; 1355 case LINUX_SCHED_FIFO: 1356 bsd.policy = SCHED_FIFO; 1357 break; 1358 case LINUX_SCHED_RR: 1359 bsd.policy = SCHED_RR; 1360 break; 1361 default: 1362 return EINVAL; 1363 } 1364 return sched_get_priority_min(td, &bsd); 1365 } 1366 1367 #define REBOOT_CAD_ON 0x89abcdef 1368 #define REBOOT_CAD_OFF 0 1369 #define REBOOT_HALT 0xcdef0123 1370 #define REBOOT_RESTART 0x01234567 1371 #define REBOOT_RESTART2 0xA1B2C3D4 1372 #define REBOOT_POWEROFF 0x4321FEDC 1373 #define REBOOT_MAGIC1 0xfee1dead 1374 #define REBOOT_MAGIC2 0x28121969 1375 #define REBOOT_MAGIC2A 0x05121996 1376 #define REBOOT_MAGIC2B 0x16041998 1377 1378 int 1379 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1380 { 1381 struct reboot_args bsd_args; 1382 1383 #ifdef DEBUG 1384 if (ldebug(reboot)) 1385 printf(ARGS(reboot, "0x%x"), args->cmd); 1386 #endif 1387 1388 if (args->magic1 != REBOOT_MAGIC1) 1389 return EINVAL; 1390 1391 switch (args->magic2) { 1392 case REBOOT_MAGIC2: 1393 case REBOOT_MAGIC2A: 1394 case REBOOT_MAGIC2B: 1395 break; 1396 default: 1397 return EINVAL; 1398 } 1399 1400 switch (args->cmd) { 1401 case REBOOT_CAD_ON: 1402 case REBOOT_CAD_OFF: 1403 return (priv_check(td, PRIV_REBOOT)); 1404 case REBOOT_HALT: 1405 bsd_args.opt = RB_HALT; 1406 break; 1407 case REBOOT_RESTART: 1408 case REBOOT_RESTART2: 1409 bsd_args.opt = 0; 1410 break; 1411 case REBOOT_POWEROFF: 1412 bsd_args.opt = RB_POWEROFF; 1413 break; 1414 default: 1415 return EINVAL; 1416 } 1417 return reboot(td, &bsd_args); 1418 } 1419 1420 1421 /* 1422 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1423 * td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that 1424 * are assumed to be preserved. The following lightweight syscalls fixes 1425 * this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c 1426 * 1427 * linux_getpid() - MP SAFE 1428 * linux_getgid() - MP SAFE 1429 * linux_getuid() - MP SAFE 1430 */ 1431 1432 int 1433 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1434 { 1435 struct linux_emuldata *em; 1436 1437 #ifdef DEBUG 1438 if (ldebug(getpid)) 1439 printf(ARGS(getpid, "")); 1440 #endif 1441 1442 if (linux_use26(td)) { 1443 em = em_find(td->td_proc, EMUL_DONTLOCK); 1444 KASSERT(em != NULL, ("getpid: emuldata not found.\n")); 1445 td->td_retval[0] = em->shared->group_pid; 1446 } else { 1447 td->td_retval[0] = td->td_proc->p_pid; 1448 } 1449 1450 return (0); 1451 } 1452 1453 int 1454 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1455 { 1456 1457 #ifdef DEBUG 1458 if (ldebug(gettid)) 1459 printf(ARGS(gettid, "")); 1460 #endif 1461 1462 td->td_retval[0] = td->td_proc->p_pid; 1463 return (0); 1464 } 1465 1466 1467 int 1468 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1469 { 1470 struct linux_emuldata *em; 1471 struct proc *p, *pp; 1472 1473 #ifdef DEBUG 1474 if (ldebug(getppid)) 1475 printf(ARGS(getppid, "")); 1476 #endif 1477 1478 if (!linux_use26(td)) { 1479 PROC_LOCK(td->td_proc); 1480 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1481 PROC_UNLOCK(td->td_proc); 1482 return (0); 1483 } 1484 1485 em = em_find(td->td_proc, EMUL_DONTLOCK); 1486 1487 KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); 1488 1489 /* find the group leader */ 1490 p = pfind(em->shared->group_pid); 1491 1492 if (p == NULL) { 1493 #ifdef DEBUG 1494 printf(LMSG("parent process not found.\n")); 1495 #endif 1496 return (0); 1497 } 1498 1499 pp = p->p_pptr; /* switch to parent */ 1500 PROC_LOCK(pp); 1501 PROC_UNLOCK(p); 1502 1503 /* if its also linux process */ 1504 if (pp->p_sysent == &elf_linux_sysvec) { 1505 em = em_find(pp, EMUL_DONTLOCK); 1506 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); 1507 1508 td->td_retval[0] = em->shared->group_pid; 1509 } else 1510 td->td_retval[0] = pp->p_pid; 1511 1512 PROC_UNLOCK(pp); 1513 1514 return (0); 1515 } 1516 1517 int 1518 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1519 { 1520 1521 #ifdef DEBUG 1522 if (ldebug(getgid)) 1523 printf(ARGS(getgid, "")); 1524 #endif 1525 1526 td->td_retval[0] = td->td_ucred->cr_rgid; 1527 return (0); 1528 } 1529 1530 int 1531 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1532 { 1533 1534 #ifdef DEBUG 1535 if (ldebug(getuid)) 1536 printf(ARGS(getuid, "")); 1537 #endif 1538 1539 td->td_retval[0] = td->td_ucred->cr_ruid; 1540 return (0); 1541 } 1542 1543 1544 int 1545 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1546 { 1547 struct getsid_args bsd; 1548 1549 #ifdef DEBUG 1550 if (ldebug(getsid)) 1551 printf(ARGS(getsid, "%i"), args->pid); 1552 #endif 1553 1554 bsd.pid = args->pid; 1555 return getsid(td, &bsd); 1556 } 1557 1558 int 1559 linux_nosys(struct thread *td, struct nosys_args *ignore) 1560 { 1561 1562 return (ENOSYS); 1563 } 1564 1565 int 1566 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1567 { 1568 struct getpriority_args bsd_args; 1569 int error; 1570 1571 #ifdef DEBUG 1572 if (ldebug(getpriority)) 1573 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1574 #endif 1575 1576 bsd_args.which = args->which; 1577 bsd_args.who = args->who; 1578 error = getpriority(td, &bsd_args); 1579 td->td_retval[0] = 20 - td->td_retval[0]; 1580 return error; 1581 } 1582 1583 int 1584 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1585 { 1586 int name[2]; 1587 1588 #ifdef DEBUG 1589 if (ldebug(sethostname)) 1590 printf(ARGS(sethostname, "*, %i"), args->len); 1591 #endif 1592 1593 name[0] = CTL_KERN; 1594 name[1] = KERN_HOSTNAME; 1595 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1596 args->len, 0, 0)); 1597 } 1598 1599 int 1600 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1601 { 1602 struct linux_emuldata *em, *td_em, *tmp_em; 1603 struct proc *sp; 1604 1605 #ifdef DEBUG 1606 if (ldebug(exit_group)) 1607 printf(ARGS(exit_group, "%i"), args->error_code); 1608 #endif 1609 1610 if (linux_use26(td)) { 1611 td_em = em_find(td->td_proc, EMUL_DONTLOCK); 1612 1613 KASSERT(td_em != NULL, ("exit_group: emuldata not found.\n")); 1614 1615 EMUL_SHARED_RLOCK(&emul_shared_lock); 1616 LIST_FOREACH_SAFE(em, &td_em->shared->threads, threads, tmp_em) { 1617 if (em->pid == td_em->pid) 1618 continue; 1619 1620 sp = pfind(em->pid); 1621 psignal(sp, SIGKILL); 1622 PROC_UNLOCK(sp); 1623 #ifdef DEBUG 1624 printf(LMSG("linux_sys_exit_group: kill PID %d\n"), em->pid); 1625 #endif 1626 } 1627 1628 EMUL_SHARED_RUNLOCK(&emul_shared_lock); 1629 } 1630 /* 1631 * XXX: we should send a signal to the parent if 1632 * SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?) 1633 * as it doesnt occur often. 1634 */ 1635 exit1(td, W_EXITCODE(args->error_code, 0)); 1636 1637 return (0); 1638 } 1639 1640 int 1641 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1642 { 1643 int error = 0, max_size; 1644 struct proc *p = td->td_proc; 1645 char comm[LINUX_MAX_COMM_LEN]; 1646 struct linux_emuldata *em; 1647 int pdeath_signal; 1648 1649 #ifdef DEBUG 1650 if (ldebug(prctl)) 1651 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, 1652 args->arg2, args->arg3, args->arg4, args->arg5); 1653 #endif 1654 1655 switch (args->option) { 1656 case LINUX_PR_SET_PDEATHSIG: 1657 if (!LINUX_SIG_VALID(args->arg2)) 1658 return (EINVAL); 1659 em = em_find(p, EMUL_DOLOCK); 1660 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1661 em->pdeath_signal = args->arg2; 1662 EMUL_UNLOCK(&emul_lock); 1663 break; 1664 case LINUX_PR_GET_PDEATHSIG: 1665 em = em_find(p, EMUL_DOLOCK); 1666 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1667 pdeath_signal = em->pdeath_signal; 1668 EMUL_UNLOCK(&emul_lock); 1669 error = copyout(&pdeath_signal, 1670 (void *)(register_t)args->arg2, 1671 sizeof(pdeath_signal)); 1672 break; 1673 case LINUX_PR_SET_NAME: 1674 /* 1675 * To be on the safe side we need to make sure to not 1676 * overflow the size a linux program expects. We already 1677 * do this here in the copyin, so that we don't need to 1678 * check on copyout. 1679 */ 1680 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1681 error = copyinstr((void *)(register_t)args->arg2, comm, 1682 max_size, NULL); 1683 1684 /* Linux silently truncates the name if it is too long. */ 1685 if (error == ENAMETOOLONG) { 1686 /* 1687 * XXX: copyinstr() isn't documented to populate the 1688 * array completely, so do a copyin() to be on the 1689 * safe side. This should be changed in case 1690 * copyinstr() is changed to guarantee this. 1691 */ 1692 error = copyin((void *)(register_t)args->arg2, comm, 1693 max_size - 1); 1694 comm[max_size - 1] = '\0'; 1695 } 1696 if (error) 1697 return (error); 1698 1699 PROC_LOCK(p); 1700 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1701 PROC_UNLOCK(p); 1702 break; 1703 case LINUX_PR_GET_NAME: 1704 PROC_LOCK(p); 1705 strlcpy(comm, p->p_comm, sizeof(comm)); 1706 PROC_UNLOCK(p); 1707 error = copyout(comm, (void *)(register_t)args->arg2, 1708 strlen(comm) + 1); 1709 break; 1710 default: 1711 error = EINVAL; 1712 break; 1713 } 1714 1715 return (error); 1716 } 1717