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