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, -1 104 }; 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, -1); 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 calcru(p, &utime, &stime); 674 calccru(p, &cutime, &cstime); 675 PROC_UNLOCK(p); 676 677 tms.tms_utime = CONVTCK(utime); 678 tms.tms_stime = CONVTCK(stime); 679 680 tms.tms_cutime = CONVTCK(cutime); 681 tms.tms_cstime = CONVTCK(cstime); 682 683 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 684 return error; 685 } 686 687 microuptime(&tv); 688 td->td_retval[0] = (int)CONVTCK(tv); 689 return 0; 690 } 691 692 int 693 linux_newuname(struct thread *td, struct linux_newuname_args *args) 694 { 695 struct l_new_utsname utsname; 696 char osname[LINUX_MAX_UTSNAME]; 697 char osrelease[LINUX_MAX_UTSNAME]; 698 char *p; 699 700 #ifdef DEBUG 701 if (ldebug(newuname)) 702 printf(ARGS(newuname, "*")); 703 #endif 704 705 linux_get_osname(td, osname); 706 linux_get_osrelease(td, osrelease); 707 708 bzero(&utsname, sizeof(utsname)); 709 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 710 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 711 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 712 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 713 for (p = utsname.version; *p != '\0'; ++p) 714 if (*p == '\n') { 715 *p = '\0'; 716 break; 717 } 718 #ifdef __i386__ 719 { 720 const char *class; 721 switch (cpu_class) { 722 case CPUCLASS_686: 723 class = "i686"; 724 break; 725 case CPUCLASS_586: 726 class = "i586"; 727 break; 728 case CPUCLASS_486: 729 class = "i486"; 730 break; 731 default: 732 class = "i386"; 733 } 734 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME); 735 } 736 #elif defined(__amd64__) /* XXX: Linux can change 'personality'. */ 737 #ifdef COMPAT_LINUX32 738 strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME); 739 #else 740 strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME); 741 #endif /* COMPAT_LINUX32 */ 742 #else /* something other than i386 or amd64 - assume we and Linux agree */ 743 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 744 #endif /* __i386__ */ 745 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 746 747 return (copyout(&utsname, args->buf, sizeof(utsname))); 748 } 749 750 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 751 struct l_utimbuf { 752 l_time_t l_actime; 753 l_time_t l_modtime; 754 }; 755 756 int 757 linux_utime(struct thread *td, struct linux_utime_args *args) 758 { 759 struct timeval tv[2], *tvp; 760 struct l_utimbuf lut; 761 char *fname; 762 int error; 763 764 LCONVPATHEXIST(td, args->fname, &fname); 765 766 #ifdef DEBUG 767 if (ldebug(utime)) 768 printf(ARGS(utime, "%s, *"), fname); 769 #endif 770 771 if (args->times) { 772 if ((error = copyin(args->times, &lut, sizeof lut))) { 773 LFREEPATH(fname); 774 return error; 775 } 776 tv[0].tv_sec = lut.l_actime; 777 tv[0].tv_usec = 0; 778 tv[1].tv_sec = lut.l_modtime; 779 tv[1].tv_usec = 0; 780 tvp = tv; 781 } else 782 tvp = NULL; 783 784 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 785 LFREEPATH(fname); 786 return (error); 787 } 788 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 789 790 #define __WCLONE 0x80000000 791 792 int 793 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 794 { 795 int error, options, tmpstat; 796 797 #ifdef DEBUG 798 if (ldebug(waitpid)) 799 printf(ARGS(waitpid, "%d, %p, %d"), 800 args->pid, (void *)args->status, args->options); 801 #endif 802 /* 803 * this is necessary because the test in kern_wait doesnt 804 * work because we mess with the options here 805 */ 806 if (args->options &~ (WUNTRACED|WNOHANG|WCONTINUED|__WCLONE)) 807 return (EINVAL); 808 809 options = (args->options & (WNOHANG | WUNTRACED)); 810 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 811 if (args->options & __WCLONE) 812 options |= WLINUXCLONE; 813 814 error = kern_wait(td, args->pid, &tmpstat, options, NULL); 815 if (error) 816 return error; 817 818 if (args->status) { 819 tmpstat &= 0xffff; 820 if (WIFSIGNALED(tmpstat)) 821 tmpstat = (tmpstat & 0xffffff80) | 822 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 823 else if (WIFSTOPPED(tmpstat)) 824 tmpstat = (tmpstat & 0xffff00ff) | 825 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 826 return copyout(&tmpstat, args->status, sizeof(int)); 827 } 828 829 return 0; 830 } 831 832 int 833 linux_wait4(struct thread *td, struct linux_wait4_args *args) 834 { 835 int error, options, tmpstat; 836 struct rusage ru, *rup; 837 struct proc *p; 838 839 #ifdef DEBUG 840 if (ldebug(wait4)) 841 printf(ARGS(wait4, "%d, %p, %d, %p"), 842 args->pid, (void *)args->status, args->options, 843 (void *)args->rusage); 844 #endif 845 846 options = (args->options & (WNOHANG | WUNTRACED)); 847 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 848 if (args->options & __WCLONE) 849 options |= WLINUXCLONE; 850 851 if (args->rusage != NULL) 852 rup = &ru; 853 else 854 rup = NULL; 855 error = kern_wait(td, args->pid, &tmpstat, options, rup); 856 if (error) 857 return error; 858 859 p = td->td_proc; 860 PROC_LOCK(p); 861 sigqueue_delete(&p->p_sigqueue, SIGCHLD); 862 PROC_UNLOCK(p); 863 864 if (args->status) { 865 tmpstat &= 0xffff; 866 if (WIFSIGNALED(tmpstat)) 867 tmpstat = (tmpstat & 0xffffff80) | 868 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 869 else if (WIFSTOPPED(tmpstat)) 870 tmpstat = (tmpstat & 0xffff00ff) | 871 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 872 error = copyout(&tmpstat, args->status, sizeof(int)); 873 } 874 if (args->rusage != NULL && error == 0) 875 error = copyout(&ru, args->rusage, sizeof(ru)); 876 877 return (error); 878 } 879 880 int 881 linux_mknod(struct thread *td, struct linux_mknod_args *args) 882 { 883 char *path; 884 int error; 885 886 LCONVPATHCREAT(td, args->path, &path); 887 888 #ifdef DEBUG 889 if (ldebug(mknod)) 890 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 891 #endif 892 893 switch (args->mode & S_IFMT) { 894 case S_IFIFO: 895 case S_IFSOCK: 896 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 897 break; 898 899 case S_IFCHR: 900 case S_IFBLK: 901 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 902 args->dev); 903 break; 904 905 case S_IFDIR: 906 error = EPERM; 907 break; 908 909 case 0: 910 args->mode |= S_IFREG; 911 /* fall through */ 912 case S_IFREG: 913 error = kern_open(td, path, UIO_SYSSPACE, 914 O_WRONLY | O_CREAT | O_TRUNC, args->mode); 915 break; 916 917 default: 918 error = EINVAL; 919 break; 920 } 921 LFREEPATH(path); 922 return (error); 923 } 924 925 /* 926 * UGH! This is just about the dumbest idea I've ever heard!! 927 */ 928 int 929 linux_personality(struct thread *td, struct linux_personality_args *args) 930 { 931 #ifdef DEBUG 932 if (ldebug(personality)) 933 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 934 #endif 935 if (args->per != 0) 936 return EINVAL; 937 938 /* Yes Jim, it's still a Linux... */ 939 td->td_retval[0] = 0; 940 return 0; 941 } 942 943 struct l_itimerval { 944 l_timeval it_interval; 945 l_timeval it_value; 946 }; 947 948 #define B2L_ITIMERVAL(bip, lip) \ 949 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \ 950 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \ 951 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \ 952 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec; 953 954 int 955 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap) 956 { 957 int error; 958 struct l_itimerval ls; 959 struct itimerval aitv, oitv; 960 961 #ifdef DEBUG 962 if (ldebug(setitimer)) 963 printf(ARGS(setitimer, "%p, %p"), 964 (void *)uap->itv, (void *)uap->oitv); 965 #endif 966 967 if (uap->itv == NULL) { 968 uap->itv = uap->oitv; 969 return (linux_getitimer(td, (struct linux_getitimer_args *)uap)); 970 } 971 972 error = copyin(uap->itv, &ls, sizeof(ls)); 973 if (error != 0) 974 return (error); 975 B2L_ITIMERVAL(&aitv, &ls); 976 #ifdef DEBUG 977 if (ldebug(setitimer)) { 978 printf("setitimer: value: sec: %jd, usec: %ld\n", 979 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec); 980 printf("setitimer: interval: sec: %jd, usec: %ld\n", 981 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec); 982 } 983 #endif 984 error = kern_setitimer(td, uap->which, &aitv, &oitv); 985 if (error != 0 || uap->oitv == NULL) 986 return (error); 987 B2L_ITIMERVAL(&ls, &oitv); 988 989 return (copyout(&ls, uap->oitv, sizeof(ls))); 990 } 991 992 int 993 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap) 994 { 995 int error; 996 struct l_itimerval ls; 997 struct itimerval aitv; 998 999 #ifdef DEBUG 1000 if (ldebug(getitimer)) 1001 printf(ARGS(getitimer, "%p"), (void *)uap->itv); 1002 #endif 1003 error = kern_getitimer(td, uap->which, &aitv); 1004 if (error != 0) 1005 return (error); 1006 B2L_ITIMERVAL(&ls, &aitv); 1007 return (copyout(&ls, uap->itv, sizeof(ls))); 1008 } 1009 1010 int 1011 linux_nice(struct thread *td, struct linux_nice_args *args) 1012 { 1013 struct setpriority_args bsd_args; 1014 1015 bsd_args.which = PRIO_PROCESS; 1016 bsd_args.who = 0; /* current process */ 1017 bsd_args.prio = args->inc; 1018 return setpriority(td, &bsd_args); 1019 } 1020 1021 int 1022 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 1023 { 1024 struct ucred *newcred, *oldcred; 1025 l_gid_t linux_gidset[NGROUPS]; 1026 gid_t *bsd_gidset; 1027 int ngrp, error; 1028 struct proc *p; 1029 1030 ngrp = args->gidsetsize; 1031 if (ngrp < 0 || ngrp >= NGROUPS) 1032 return (EINVAL); 1033 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 1034 if (error) 1035 return (error); 1036 newcred = crget(); 1037 p = td->td_proc; 1038 PROC_LOCK(p); 1039 oldcred = p->p_ucred; 1040 1041 /* 1042 * cr_groups[0] holds egid. Setting the whole set from 1043 * the supplied set will cause egid to be changed too. 1044 * Keep cr_groups[0] unchanged to prevent that. 1045 */ 1046 1047 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 1048 SUSER_ALLOWJAIL)) != 0) { 1049 PROC_UNLOCK(p); 1050 crfree(newcred); 1051 return (error); 1052 } 1053 1054 crcopy(newcred, oldcred); 1055 if (ngrp > 0) { 1056 newcred->cr_ngroups = ngrp + 1; 1057 1058 bsd_gidset = newcred->cr_groups; 1059 ngrp--; 1060 while (ngrp >= 0) { 1061 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1062 ngrp--; 1063 } 1064 } 1065 else 1066 newcred->cr_ngroups = 1; 1067 1068 setsugid(p); 1069 p->p_ucred = newcred; 1070 PROC_UNLOCK(p); 1071 crfree(oldcred); 1072 return (0); 1073 } 1074 1075 int 1076 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1077 { 1078 struct ucred *cred; 1079 l_gid_t linux_gidset[NGROUPS]; 1080 gid_t *bsd_gidset; 1081 int bsd_gidsetsz, ngrp, error; 1082 1083 cred = td->td_ucred; 1084 bsd_gidset = cred->cr_groups; 1085 bsd_gidsetsz = cred->cr_ngroups - 1; 1086 1087 /* 1088 * cr_groups[0] holds egid. Returning the whole set 1089 * here will cause a duplicate. Exclude cr_groups[0] 1090 * to prevent that. 1091 */ 1092 1093 if ((ngrp = args->gidsetsize) == 0) { 1094 td->td_retval[0] = bsd_gidsetsz; 1095 return (0); 1096 } 1097 1098 if (ngrp < bsd_gidsetsz) 1099 return (EINVAL); 1100 1101 ngrp = 0; 1102 while (ngrp < bsd_gidsetsz) { 1103 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1104 ngrp++; 1105 } 1106 1107 if ((error = copyout(linux_gidset, args->grouplist, 1108 ngrp * sizeof(l_gid_t)))) 1109 return (error); 1110 1111 td->td_retval[0] = ngrp; 1112 return (0); 1113 } 1114 1115 int 1116 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1117 { 1118 struct rlimit bsd_rlim; 1119 struct l_rlimit rlim; 1120 u_int which; 1121 int error; 1122 1123 #ifdef DEBUG 1124 if (ldebug(setrlimit)) 1125 printf(ARGS(setrlimit, "%d, %p"), 1126 args->resource, (void *)args->rlim); 1127 #endif 1128 1129 if (args->resource >= LINUX_RLIM_NLIMITS) 1130 return (EINVAL); 1131 1132 which = linux_to_bsd_resource[args->resource]; 1133 if (which == -1) 1134 return (EINVAL); 1135 1136 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1137 if (error) 1138 return (error); 1139 1140 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1141 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1142 return (kern_setrlimit(td, which, &bsd_rlim)); 1143 } 1144 1145 int 1146 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1147 { 1148 struct l_rlimit rlim; 1149 struct proc *p = td->td_proc; 1150 struct rlimit bsd_rlim; 1151 u_int which; 1152 1153 #ifdef DEBUG 1154 if (ldebug(old_getrlimit)) 1155 printf(ARGS(old_getrlimit, "%d, %p"), 1156 args->resource, (void *)args->rlim); 1157 #endif 1158 1159 if (args->resource >= LINUX_RLIM_NLIMITS) 1160 return (EINVAL); 1161 1162 which = linux_to_bsd_resource[args->resource]; 1163 if (which == -1) 1164 return (EINVAL); 1165 1166 PROC_LOCK(p); 1167 lim_rlimit(p, which, &bsd_rlim); 1168 PROC_UNLOCK(p); 1169 1170 #ifdef COMPAT_LINUX32 1171 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur; 1172 if (rlim.rlim_cur == UINT_MAX) 1173 rlim.rlim_cur = INT_MAX; 1174 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max; 1175 if (rlim.rlim_max == UINT_MAX) 1176 rlim.rlim_max = INT_MAX; 1177 #else 1178 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1179 if (rlim.rlim_cur == ULONG_MAX) 1180 rlim.rlim_cur = LONG_MAX; 1181 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1182 if (rlim.rlim_max == ULONG_MAX) 1183 rlim.rlim_max = LONG_MAX; 1184 #endif 1185 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1186 } 1187 1188 int 1189 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1190 { 1191 struct l_rlimit rlim; 1192 struct proc *p = td->td_proc; 1193 struct rlimit bsd_rlim; 1194 u_int which; 1195 1196 #ifdef DEBUG 1197 if (ldebug(getrlimit)) 1198 printf(ARGS(getrlimit, "%d, %p"), 1199 args->resource, (void *)args->rlim); 1200 #endif 1201 1202 if (args->resource >= LINUX_RLIM_NLIMITS) 1203 return (EINVAL); 1204 1205 which = linux_to_bsd_resource[args->resource]; 1206 if (which == -1) 1207 return (EINVAL); 1208 1209 PROC_LOCK(p); 1210 lim_rlimit(p, which, &bsd_rlim); 1211 PROC_UNLOCK(p); 1212 1213 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1214 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1215 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1216 } 1217 1218 int 1219 linux_sched_setscheduler(struct thread *td, 1220 struct linux_sched_setscheduler_args *args) 1221 { 1222 struct sched_setscheduler_args bsd; 1223 1224 #ifdef DEBUG 1225 if (ldebug(sched_setscheduler)) 1226 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1227 args->pid, args->policy, (const void *)args->param); 1228 #endif 1229 1230 switch (args->policy) { 1231 case LINUX_SCHED_OTHER: 1232 bsd.policy = SCHED_OTHER; 1233 break; 1234 case LINUX_SCHED_FIFO: 1235 bsd.policy = SCHED_FIFO; 1236 break; 1237 case LINUX_SCHED_RR: 1238 bsd.policy = SCHED_RR; 1239 break; 1240 default: 1241 return EINVAL; 1242 } 1243 1244 bsd.pid = args->pid; 1245 bsd.param = (struct sched_param *)args->param; 1246 return sched_setscheduler(td, &bsd); 1247 } 1248 1249 int 1250 linux_sched_getscheduler(struct thread *td, 1251 struct linux_sched_getscheduler_args *args) 1252 { 1253 struct sched_getscheduler_args bsd; 1254 int error; 1255 1256 #ifdef DEBUG 1257 if (ldebug(sched_getscheduler)) 1258 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1259 #endif 1260 1261 bsd.pid = args->pid; 1262 error = sched_getscheduler(td, &bsd); 1263 1264 switch (td->td_retval[0]) { 1265 case SCHED_OTHER: 1266 td->td_retval[0] = LINUX_SCHED_OTHER; 1267 break; 1268 case SCHED_FIFO: 1269 td->td_retval[0] = LINUX_SCHED_FIFO; 1270 break; 1271 case SCHED_RR: 1272 td->td_retval[0] = LINUX_SCHED_RR; 1273 break; 1274 } 1275 1276 return error; 1277 } 1278 1279 int 1280 linux_sched_get_priority_max(struct thread *td, 1281 struct linux_sched_get_priority_max_args *args) 1282 { 1283 struct sched_get_priority_max_args bsd; 1284 1285 #ifdef DEBUG 1286 if (ldebug(sched_get_priority_max)) 1287 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1288 #endif 1289 1290 switch (args->policy) { 1291 case LINUX_SCHED_OTHER: 1292 bsd.policy = SCHED_OTHER; 1293 break; 1294 case LINUX_SCHED_FIFO: 1295 bsd.policy = SCHED_FIFO; 1296 break; 1297 case LINUX_SCHED_RR: 1298 bsd.policy = SCHED_RR; 1299 break; 1300 default: 1301 return EINVAL; 1302 } 1303 return sched_get_priority_max(td, &bsd); 1304 } 1305 1306 int 1307 linux_sched_get_priority_min(struct thread *td, 1308 struct linux_sched_get_priority_min_args *args) 1309 { 1310 struct sched_get_priority_min_args bsd; 1311 1312 #ifdef DEBUG 1313 if (ldebug(sched_get_priority_min)) 1314 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1315 #endif 1316 1317 switch (args->policy) { 1318 case LINUX_SCHED_OTHER: 1319 bsd.policy = SCHED_OTHER; 1320 break; 1321 case LINUX_SCHED_FIFO: 1322 bsd.policy = SCHED_FIFO; 1323 break; 1324 case LINUX_SCHED_RR: 1325 bsd.policy = SCHED_RR; 1326 break; 1327 default: 1328 return EINVAL; 1329 } 1330 return sched_get_priority_min(td, &bsd); 1331 } 1332 1333 #define REBOOT_CAD_ON 0x89abcdef 1334 #define REBOOT_CAD_OFF 0 1335 #define REBOOT_HALT 0xcdef0123 1336 #define REBOOT_RESTART 0x01234567 1337 #define REBOOT_RESTART2 0xA1B2C3D4 1338 #define REBOOT_POWEROFF 0x4321FEDC 1339 #define REBOOT_MAGIC1 0xfee1dead 1340 #define REBOOT_MAGIC2 0x28121969 1341 #define REBOOT_MAGIC2A 0x05121996 1342 #define REBOOT_MAGIC2B 0x16041998 1343 1344 int 1345 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1346 { 1347 struct reboot_args bsd_args; 1348 1349 #ifdef DEBUG 1350 if (ldebug(reboot)) 1351 printf(ARGS(reboot, "0x%x"), args->cmd); 1352 #endif 1353 1354 if (args->magic1 != REBOOT_MAGIC1) 1355 return EINVAL; 1356 1357 switch (args->magic2) { 1358 case REBOOT_MAGIC2: 1359 case REBOOT_MAGIC2A: 1360 case REBOOT_MAGIC2B: 1361 break; 1362 default: 1363 return EINVAL; 1364 } 1365 1366 switch (args->cmd) { 1367 case REBOOT_CAD_ON: 1368 case REBOOT_CAD_OFF: 1369 return (priv_check(td, PRIV_REBOOT)); 1370 case REBOOT_HALT: 1371 bsd_args.opt = RB_HALT; 1372 break; 1373 case REBOOT_RESTART: 1374 case REBOOT_RESTART2: 1375 bsd_args.opt = 0; 1376 break; 1377 case REBOOT_POWEROFF: 1378 bsd_args.opt = RB_POWEROFF; 1379 break; 1380 default: 1381 return EINVAL; 1382 } 1383 return reboot(td, &bsd_args); 1384 } 1385 1386 1387 /* 1388 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1389 * td->td_retval[1] when COMPAT_43 is defined. This 1390 * globbers registers that are assumed to be preserved. The following 1391 * lightweight syscalls fixes this. See also linux_getgid16() and 1392 * linux_getuid16() in linux_uid16.c. 1393 * 1394 * linux_getpid() - MP SAFE 1395 * linux_getgid() - MP SAFE 1396 * linux_getuid() - MP SAFE 1397 */ 1398 1399 int 1400 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1401 { 1402 struct linux_emuldata *em; 1403 char osrel[LINUX_MAX_UTSNAME]; 1404 1405 #ifdef DEBUG 1406 if (ldebug(getpid)) 1407 printf(ARGS(getpid, "")); 1408 #endif 1409 1410 linux_get_osrelease(td, osrel); 1411 if (strlen(osrel) >= 3 && osrel[2] == '6') { 1412 em = em_find(td->td_proc, EMUL_UNLOCKED); 1413 KASSERT(em != NULL, ("getpid: emuldata not found.\n")); 1414 td->td_retval[0] = em->shared->group_pid; 1415 EMUL_UNLOCK(&emul_lock); 1416 } else { 1417 td->td_retval[0] = td->td_proc->p_pid; 1418 } 1419 1420 return (0); 1421 } 1422 1423 int 1424 linux_gettid(struct thread *td, struct linux_gettid_args *args) 1425 { 1426 #ifdef DEBUG 1427 if (ldebug(gettid)) 1428 printf(ARGS(gettid, "")); 1429 #endif 1430 1431 td->td_retval[0] = td->td_proc->p_pid; 1432 return (0); 1433 } 1434 1435 1436 int 1437 linux_getppid(struct thread *td, struct linux_getppid_args *args) 1438 { 1439 struct linux_emuldata *em; 1440 struct proc *p, *pp; 1441 char osrel[LINUX_MAX_UTSNAME]; 1442 1443 #ifdef DEBUG 1444 if (ldebug(getppid)) 1445 printf(ARGS(getppid, "")); 1446 #endif 1447 1448 linux_get_osrelease(td, osrel); 1449 if (strlen(osrel) >= 3 && osrel[2] != '6') { 1450 PROC_LOCK(td->td_proc); 1451 td->td_retval[0] = td->td_proc->p_pptr->p_pid; 1452 PROC_UNLOCK(td->td_proc); 1453 return (0); 1454 } 1455 1456 em = em_find(td->td_proc, EMUL_UNLOCKED); 1457 1458 KASSERT(em != NULL, ("getppid: process emuldata not found.\n")); 1459 1460 /* find the group leader */ 1461 p = pfind(em->shared->group_pid); 1462 1463 if (p == NULL) { 1464 #ifdef DEBUG 1465 printf(LMSG("parent process not found.\n")); 1466 #endif 1467 return (0); 1468 } 1469 1470 pp = p->p_pptr; /* switch to parent */ 1471 PROC_LOCK(pp); 1472 PROC_UNLOCK(p); 1473 1474 /* if its also linux process */ 1475 if (pp->p_sysent == &elf_linux_sysvec) { 1476 em = em_find(pp, EMUL_LOCKED); 1477 KASSERT(em != NULL, ("getppid: parent emuldata not found.\n")); 1478 1479 td->td_retval[0] = em->shared->group_pid; 1480 } else 1481 td->td_retval[0] = pp->p_pid; 1482 1483 EMUL_UNLOCK(&emul_lock); 1484 PROC_UNLOCK(pp); 1485 1486 return (0); 1487 } 1488 1489 int 1490 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1491 { 1492 1493 #ifdef DEBUG 1494 if (ldebug(getgid)) 1495 printf(ARGS(getgid, "")); 1496 #endif 1497 1498 td->td_retval[0] = td->td_ucred->cr_rgid; 1499 return (0); 1500 } 1501 1502 int 1503 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1504 { 1505 1506 #ifdef DEBUG 1507 if (ldebug(getuid)) 1508 printf(ARGS(getuid, "")); 1509 #endif 1510 1511 td->td_retval[0] = td->td_ucred->cr_ruid; 1512 return (0); 1513 } 1514 1515 1516 int 1517 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1518 { 1519 struct getsid_args bsd; 1520 1521 #ifdef DEBUG 1522 if (ldebug(getsid)) 1523 printf(ARGS(getsid, "%i"), args->pid); 1524 #endif 1525 1526 bsd.pid = args->pid; 1527 return getsid(td, &bsd); 1528 } 1529 1530 int 1531 linux_nosys(struct thread *td, struct nosys_args *ignore) 1532 { 1533 1534 return (ENOSYS); 1535 } 1536 1537 int 1538 linux_getpriority(struct thread *td, struct linux_getpriority_args *args) 1539 { 1540 struct getpriority_args bsd_args; 1541 int error; 1542 1543 #ifdef DEBUG 1544 if (ldebug(getpriority)) 1545 printf(ARGS(getpriority, "%i, %i"), args->which, args->who); 1546 #endif 1547 1548 bsd_args.which = args->which; 1549 bsd_args.who = args->who; 1550 error = getpriority(td, &bsd_args); 1551 td->td_retval[0] = 20 - td->td_retval[0]; 1552 return error; 1553 } 1554 1555 int 1556 linux_sethostname(struct thread *td, struct linux_sethostname_args *args) 1557 { 1558 int name[2]; 1559 1560 #ifdef DEBUG 1561 if (ldebug(sethostname)) 1562 printf(ARGS(sethostname, "*, %i"), args->len); 1563 #endif 1564 1565 name[0] = CTL_KERN; 1566 name[1] = KERN_HOSTNAME; 1567 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname, 1568 args->len, 0, 0)); 1569 } 1570 1571 int 1572 linux_exit_group(struct thread *td, struct linux_exit_group_args *args) 1573 { 1574 struct linux_emuldata *em, *td_em, *tmp_em; 1575 struct proc *sp; 1576 char osrel[LINUX_MAX_UTSNAME]; 1577 1578 #ifdef DEBUG 1579 if (ldebug(exit_group)) 1580 printf(ARGS(exit_group, "%i"), args->error_code); 1581 #endif 1582 1583 linux_get_osrelease(td, osrel); 1584 if (strlen(osrel) >= 3 && osrel[2] == '6') { 1585 td_em = em_find(td->td_proc, EMUL_UNLOCKED); 1586 1587 KASSERT(td_em != NULL, ("exit_group: emuldata not found.\n")); 1588 1589 EMUL_SHARED_RLOCK(&emul_shared_lock); 1590 LIST_FOREACH_SAFE(em, &td_em->shared->threads, threads, tmp_em) { 1591 if (em->pid == td_em->pid) 1592 continue; 1593 1594 sp = pfind(em->pid); 1595 psignal(sp, SIGKILL); 1596 PROC_UNLOCK(sp); 1597 #ifdef DEBUG 1598 printf(LMSG("linux_sys_exit_group: kill PID %d\n"), em->pid); 1599 #endif 1600 } 1601 1602 EMUL_SHARED_RUNLOCK(&emul_shared_lock); 1603 EMUL_UNLOCK(&emul_lock); 1604 } 1605 1606 exit1(td, W_EXITCODE(args->error_code,0)); 1607 1608 return (0); 1609 } 1610 1611 int 1612 linux_prctl(struct thread *td, struct linux_prctl_args *args) 1613 { 1614 int error = 0, max_size; 1615 struct proc *p = td->td_proc; 1616 char comm[LINUX_MAX_COMM_LEN]; 1617 struct linux_emuldata *em; 1618 1619 #ifdef DEBUG 1620 if (ldebug(prctl)) 1621 printf(ARGS(prctl, "%d, %d, %d, %d, %d"), args->option, args->arg2, 1622 args->arg3, args->arg4, args->arg5); 1623 #endif 1624 1625 switch (args->option) { 1626 case LINUX_PR_SET_PDEATHSIG: 1627 if (!LINUX_SIG_VALID(args->arg2)) 1628 return (EINVAL); 1629 em = em_find(p, EMUL_UNLOCKED); 1630 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1631 em->pdeath_signal = args->arg2; 1632 EMUL_UNLOCK(&emul_lock); 1633 break; 1634 case LINUX_PR_GET_PDEATHSIG: 1635 em = em_find(p, EMUL_UNLOCKED); 1636 KASSERT(em != NULL, ("prctl: emuldata not found.\n")); 1637 error = copyout(&em->pdeath_signal, (void *)(register_t) args->arg2, sizeof(em->pdeath_signal)); 1638 EMUL_UNLOCK(&emul_lock); 1639 break; 1640 case LINUX_PR_SET_NAME: 1641 /* 1642 * To be on the safe side we need to make sure to not 1643 * overflow the size a linux program expects. We already 1644 * do this here in the copyin, so that we don't need to 1645 * check on copyout. 1646 */ 1647 max_size = MIN(sizeof(comm), sizeof(p->p_comm)); 1648 error = copyinstr((void *)(register_t) args->arg2, comm, 1649 max_size, NULL); 1650 1651 /* Linux silently truncates the name if it is too long. */ 1652 if (error == ENAMETOOLONG) { 1653 /* 1654 * XXX: copyinstr() isn't documented to populate the 1655 * array completely, so do a copyin() to be on the 1656 * safe side. This should be changed in case 1657 * copyinstr() is changed to guarantee this. 1658 */ 1659 error = copyin((void *)(register_t)args->arg2, comm, 1660 max_size - 1); 1661 comm[max_size - 1] = '\0'; 1662 } 1663 if (error) 1664 return (error); 1665 1666 PROC_LOCK(p); 1667 strlcpy(p->p_comm, comm, sizeof(p->p_comm)); 1668 PROC_UNLOCK(p); 1669 break; 1670 case LINUX_PR_GET_NAME: 1671 PROC_LOCK(p); 1672 strlcpy(comm, p->p_comm, sizeof(comm)); 1673 PROC_UNLOCK(p); 1674 error = copyout(comm, (void *)(register_t) args->arg2, 1675 strlen(comm)+1); 1676 break; 1677 default: 1678 error = EINVAL; 1679 break; 1680 } 1681 1682 return (error); 1683 } 1684