1 /*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_mac.h" 33 34 #include <sys/param.h> 35 #include <sys/blist.h> 36 #include <sys/fcntl.h> 37 #include <sys/imgact_aout.h> 38 #include <sys/jail.h> 39 #include <sys/kernel.h> 40 #include <sys/limits.h> 41 #include <sys/lock.h> 42 #include <sys/mac.h> 43 #include <sys/malloc.h> 44 #include <sys/mman.h> 45 #include <sys/mount.h> 46 #include <sys/mutex.h> 47 #include <sys/namei.h> 48 #include <sys/proc.h> 49 #include <sys/reboot.h> 50 #include <sys/resourcevar.h> 51 #include <sys/signalvar.h> 52 #include <sys/stat.h> 53 #include <sys/syscallsubr.h> 54 #include <sys/sysctl.h> 55 #include <sys/sysproto.h> 56 #include <sys/systm.h> 57 #include <sys/time.h> 58 #include <sys/vmmeter.h> 59 #include <sys/vnode.h> 60 #include <sys/wait.h> 61 62 #include <vm/vm.h> 63 #include <vm/pmap.h> 64 #include <vm/vm_kern.h> 65 #include <vm/vm_map.h> 66 #include <vm/vm_extern.h> 67 #include <vm/vm_object.h> 68 #include <vm/swap_pager.h> 69 70 #include <posix4/sched.h> 71 72 #include <machine/../linux/linux.h> 73 #include <machine/../linux/linux_proto.h> 74 75 #include <compat/linux/linux_mib.h> 76 #include <compat/linux/linux_util.h> 77 78 #ifdef __alpha__ 79 #define BSD_TO_LINUX_SIGNAL(sig) (sig) 80 #else 81 #define BSD_TO_LINUX_SIGNAL(sig) \ 82 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 83 #endif 84 85 #ifndef __alpha__ 86 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 87 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 88 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 89 RLIMIT_MEMLOCK, -1 90 }; 91 #endif /*!__alpha__*/ 92 93 struct l_sysinfo { 94 l_long uptime; /* Seconds since boot */ 95 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 96 l_ulong totalram; /* Total usable main memory size */ 97 l_ulong freeram; /* Available memory size */ 98 l_ulong sharedram; /* Amount of shared memory */ 99 l_ulong bufferram; /* Memory used by buffers */ 100 l_ulong totalswap; /* Total swap space size */ 101 l_ulong freeswap; /* swap space still available */ 102 l_ushort procs; /* Number of current processes */ 103 char _f[22]; /* Pads structure to 64 bytes */ 104 }; 105 #ifndef __alpha__ 106 int 107 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 108 { 109 struct l_sysinfo sysinfo; 110 vm_object_t object; 111 int i, j; 112 struct timespec ts; 113 114 /* Uptime is copied out of print_uptime() in kern_shutdown.c */ 115 getnanouptime(&ts); 116 i = 0; 117 if (ts.tv_sec >= 86400) { 118 ts.tv_sec %= 86400; 119 i = 1; 120 } 121 if (i || ts.tv_sec >= 3600) { 122 ts.tv_sec %= 3600; 123 i = 1; 124 } 125 if (i || ts.tv_sec >= 60) { 126 ts.tv_sec %= 60; 127 i = 1; 128 } 129 sysinfo.uptime=ts.tv_sec; 130 131 /* Use the information from the mib to get our load averages */ 132 for (i = 0; i < 3; i++) 133 sysinfo.loads[i] = averunnable.ldavg[i]; 134 135 sysinfo.totalram = physmem * PAGE_SIZE; 136 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 137 138 sysinfo.sharedram = 0; 139 for (object = TAILQ_FIRST(&vm_object_list); object != NULL; 140 object = TAILQ_NEXT(object, object_list)) 141 if (object->shadow_count > 1) 142 sysinfo.sharedram += object->resident_page_count; 143 144 sysinfo.sharedram *= PAGE_SIZE; 145 sysinfo.bufferram = 0; 146 147 swap_pager_status(&i, &j); 148 sysinfo.totalswap= i * PAGE_SIZE; 149 sysinfo.freeswap = (i - j) * PAGE_SIZE; 150 151 sysinfo.procs = 20; /* Hack */ 152 153 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 154 } 155 #endif /*!__alpha__*/ 156 157 #ifndef __alpha__ 158 int 159 linux_alarm(struct thread *td, struct linux_alarm_args *args) 160 { 161 struct itimerval it, old_it; 162 struct timeval tv; 163 struct proc *p; 164 165 #ifdef DEBUG 166 if (ldebug(alarm)) 167 printf(ARGS(alarm, "%u"), args->secs); 168 #endif 169 170 if (args->secs > 100000000) 171 return EINVAL; 172 173 it.it_value.tv_sec = (long)args->secs; 174 it.it_value.tv_usec = 0; 175 it.it_interval.tv_sec = 0; 176 it.it_interval.tv_usec = 0; 177 p = td->td_proc; 178 PROC_LOCK(p); 179 old_it = p->p_realtimer; 180 getmicrouptime(&tv); 181 if (timevalisset(&old_it.it_value)) 182 callout_stop(&p->p_itcallout); 183 if (it.it_value.tv_sec != 0) { 184 callout_reset(&p->p_itcallout, tvtohz(&it.it_value), 185 realitexpire, p); 186 timevaladd(&it.it_value, &tv); 187 } 188 p->p_realtimer = it; 189 PROC_UNLOCK(p); 190 if (timevalcmp(&old_it.it_value, &tv, >)) { 191 timevalsub(&old_it.it_value, &tv); 192 if (old_it.it_value.tv_usec != 0) 193 old_it.it_value.tv_sec++; 194 td->td_retval[0] = old_it.it_value.tv_sec; 195 } 196 return 0; 197 } 198 #endif /*!__alpha__*/ 199 200 int 201 linux_brk(struct thread *td, struct linux_brk_args *args) 202 { 203 struct vmspace *vm = td->td_proc->p_vmspace; 204 vm_offset_t new, old; 205 struct obreak_args /* { 206 char * nsize; 207 } */ tmp; 208 209 #ifdef DEBUG 210 if (ldebug(brk)) 211 printf(ARGS(brk, "%p"), (void *)args->dsend); 212 #endif 213 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 214 new = (vm_offset_t)args->dsend; 215 tmp.nsize = (char *) new; 216 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 217 td->td_retval[0] = (long)new; 218 else 219 td->td_retval[0] = (long)old; 220 221 return 0; 222 } 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; 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 locked = 0; 248 vp = NULL; 249 250 /* 251 * XXX: This code should make use of vn_open(), rather than doing 252 * all this stuff itself. 253 */ 254 NDINIT(&ni, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, library, td); 255 error = namei(&ni); 256 LFREEPATH(library); 257 if (error) 258 goto cleanup; 259 260 vp = ni.ni_vp; 261 /* 262 * XXX - This looks like a bogus check. A LOCKLEAF namei should not 263 * succeed without returning a vnode. 264 */ 265 if (vp == NULL) { 266 error = ENOEXEC; /* ?? */ 267 goto cleanup; 268 } 269 NDFREE(&ni, NDF_ONLY_PNBUF); 270 271 /* 272 * From here on down, we have a locked vnode that must be unlocked. 273 */ 274 locked++; 275 276 /* Writable? */ 277 if (vp->v_writecount) { 278 error = ETXTBSY; 279 goto cleanup; 280 } 281 282 /* Executable? */ 283 error = VOP_GETATTR(vp, &attr, td->td_ucred, td); 284 if (error) 285 goto cleanup; 286 287 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 288 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 289 error = ENOEXEC; 290 goto cleanup; 291 } 292 293 /* Sensible size? */ 294 if (attr.va_size == 0) { 295 error = ENOEXEC; 296 goto cleanup; 297 } 298 299 /* Can we access it? */ 300 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 301 if (error) 302 goto cleanup; 303 304 /* 305 * XXX: This should use vn_open() so that it is properly authorized, 306 * and to reduce code redundancy all over the place here. 307 */ 308 #ifdef MAC 309 error = mac_check_vnode_open(td->td_ucred, vp, FREAD); 310 if (error) 311 goto cleanup; 312 #endif 313 error = VOP_OPEN(vp, FREAD, td->td_ucred, td); 314 if (error) 315 goto cleanup; 316 317 /* Pull in executable header into kernel_map */ 318 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 319 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 320 /* 321 * Lock no longer needed 322 */ 323 locked = 0; 324 VOP_UNLOCK(vp, 0, td); 325 326 if (error) 327 goto cleanup; 328 329 /* Is it a Linux binary ? */ 330 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 331 error = ENOEXEC; 332 goto cleanup; 333 } 334 335 /* 336 * While we are here, we should REALLY do some more checks 337 */ 338 339 /* Set file/virtual offset based on a.out variant. */ 340 switch ((int)(a_out->a_magic & 0xffff)) { 341 case 0413: /* ZMAGIC */ 342 file_offset = 1024; 343 break; 344 case 0314: /* QMAGIC */ 345 file_offset = 0; 346 break; 347 default: 348 error = ENOEXEC; 349 goto cleanup; 350 } 351 352 bss_size = round_page(a_out->a_bss); 353 354 /* Check various fields in header for validity/bounds. */ 355 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 356 error = ENOEXEC; 357 goto cleanup; 358 } 359 360 /* text + data can't exceed file size */ 361 if (a_out->a_data + a_out->a_text > attr.va_size) { 362 error = EFAULT; 363 goto cleanup; 364 } 365 366 /* To protect td->td_proc->p_rlimit in the if condition. */ 367 mtx_assert(&Giant, MA_OWNED); 368 369 /* 370 * text/data/bss must not exceed limits 371 * XXX - this is not complete. it should check current usage PLUS 372 * the resources needed by this library. 373 */ 374 if (a_out->a_text > maxtsiz || 375 a_out->a_data + bss_size > 376 td->td_proc->p_rlimit[RLIMIT_DATA].rlim_cur) { 377 error = ENOMEM; 378 goto cleanup; 379 } 380 381 mp_fixme("Unlocked vflags access."); 382 /* prevent more writers */ 383 vp->v_vflag |= VV_TEXT; 384 385 /* 386 * Check if file_offset page aligned. Currently we cannot handle 387 * misalinged file offsets, and so we read in the entire image 388 * (what a waste). 389 */ 390 if (file_offset & PAGE_MASK) { 391 #ifdef DEBUG 392 printf("uselib: Non page aligned binary %lu\n", file_offset); 393 #endif 394 /* Map text+data read/write/execute */ 395 396 /* a_entry is the load address and is page aligned */ 397 vmaddr = trunc_page(a_out->a_entry); 398 399 /* get anon user mapping, read+write+execute */ 400 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 401 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 402 VM_PROT_ALL, 0); 403 if (error) 404 goto cleanup; 405 406 /* map file into kernel_map */ 407 error = vm_mmap(kernel_map, &buffer, 408 round_page(a_out->a_text + a_out->a_data + file_offset), 409 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 410 trunc_page(file_offset)); 411 if (error) 412 goto cleanup; 413 414 /* copy from kernel VM space to user space */ 415 error = copyout((void *)(buffer + file_offset), 416 (void *)vmaddr, a_out->a_text + a_out->a_data); 417 418 /* release temporary kernel space */ 419 vm_map_remove(kernel_map, buffer, buffer + 420 round_page(a_out->a_text + a_out->a_data + file_offset)); 421 422 if (error) 423 goto cleanup; 424 } else { 425 #ifdef DEBUG 426 printf("uselib: Page aligned binary %lu\n", file_offset); 427 #endif 428 /* 429 * for QMAGIC, a_entry is 20 bytes beyond the load address 430 * to skip the executable header 431 */ 432 vmaddr = trunc_page(a_out->a_entry); 433 434 /* 435 * Map it all into the process's space as a single 436 * copy-on-write "data" segment. 437 */ 438 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 439 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 440 MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset); 441 if (error) 442 goto cleanup; 443 } 444 #ifdef DEBUG 445 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0], 446 ((long*)vmaddr)[1]); 447 #endif 448 if (bss_size != 0) { 449 /* Calculate BSS start address */ 450 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 451 a_out->a_data; 452 453 /* allocate some 'anon' space */ 454 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 455 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 456 if (error) 457 goto cleanup; 458 } 459 460 cleanup: 461 /* Unlock vnode if needed */ 462 if (locked) 463 VOP_UNLOCK(vp, 0, td); 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 int 474 linux_select(struct thread *td, struct linux_select_args *args) 475 { 476 struct timeval tv0, tv1, utv, *tvp; 477 int error; 478 479 #ifdef DEBUG 480 if (ldebug(select)) 481 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 482 (void *)args->readfds, (void *)args->writefds, 483 (void *)args->exceptfds, (void *)args->timeout); 484 #endif 485 486 /* 487 * Store current time for computation of the amount of 488 * time left. 489 */ 490 if (args->timeout) { 491 if ((error = copyin(args->timeout, &utv, sizeof(utv)))) 492 goto select_out; 493 #ifdef DEBUG 494 if (ldebug(select)) 495 printf(LMSG("incoming timeout (%ld/%ld)"), 496 utv.tv_sec, utv.tv_usec); 497 #endif 498 499 if (itimerfix(&utv)) { 500 /* 501 * The timeval was invalid. Convert it to something 502 * valid that will act as it does under Linux. 503 */ 504 utv.tv_sec += utv.tv_usec / 1000000; 505 utv.tv_usec %= 1000000; 506 if (utv.tv_usec < 0) { 507 utv.tv_sec -= 1; 508 utv.tv_usec += 1000000; 509 } 510 if (utv.tv_sec < 0) 511 timevalclear(&utv); 512 } 513 microtime(&tv0); 514 tvp = &utv; 515 } else 516 tvp = NULL; 517 518 error = kern_select(td, args->nfds, args->readfds, args->writefds, 519 args->exceptfds, tvp); 520 521 #ifdef DEBUG 522 if (ldebug(select)) 523 printf(LMSG("real select returns %d"), error); 524 #endif 525 if (error) { 526 /* 527 * See fs/select.c in the Linux kernel. Without this, 528 * Maelstrom doesn't work. 529 */ 530 if (error == ERESTART) 531 error = EINTR; 532 goto select_out; 533 } 534 535 if (args->timeout) { 536 if (td->td_retval[0]) { 537 /* 538 * Compute how much time was left of the timeout, 539 * by subtracting the current time and the time 540 * before we started the call, and subtracting 541 * that result from the user-supplied value. 542 */ 543 microtime(&tv1); 544 timevalsub(&tv1, &tv0); 545 timevalsub(&utv, &tv1); 546 if (utv.tv_sec < 0) 547 timevalclear(&utv); 548 } else 549 timevalclear(&utv); 550 #ifdef DEBUG 551 if (ldebug(select)) 552 printf(LMSG("outgoing timeout (%ld/%ld)"), 553 utv.tv_sec, utv.tv_usec); 554 #endif 555 if ((error = copyout(&utv, args->timeout, sizeof(utv)))) 556 goto select_out; 557 } 558 559 select_out: 560 #ifdef DEBUG 561 if (ldebug(select)) 562 printf(LMSG("select_out -> %d"), error); 563 #endif 564 return error; 565 } 566 567 int 568 linux_mremap(struct thread *td, struct linux_mremap_args *args) 569 { 570 struct munmap_args /* { 571 void *addr; 572 size_t len; 573 } */ bsd_args; 574 int error = 0; 575 576 #ifdef DEBUG 577 if (ldebug(mremap)) 578 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 579 (void *)args->addr, 580 (unsigned long)args->old_len, 581 (unsigned long)args->new_len, 582 (unsigned long)args->flags); 583 #endif 584 args->new_len = round_page(args->new_len); 585 args->old_len = round_page(args->old_len); 586 587 if (args->new_len > args->old_len) { 588 td->td_retval[0] = 0; 589 return ENOMEM; 590 } 591 592 if (args->new_len < args->old_len) { 593 bsd_args.addr = (caddr_t)(args->addr + args->new_len); 594 bsd_args.len = args->old_len - args->new_len; 595 error = munmap(td, &bsd_args); 596 } 597 598 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 599 return error; 600 } 601 602 #define LINUX_MS_ASYNC 0x0001 603 #define LINUX_MS_INVALIDATE 0x0002 604 #define LINUX_MS_SYNC 0x0004 605 606 int 607 linux_msync(struct thread *td, struct linux_msync_args *args) 608 { 609 struct msync_args bsd_args; 610 611 bsd_args.addr = (caddr_t)args->addr; 612 bsd_args.len = args->len; 613 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 614 615 return msync(td, &bsd_args); 616 } 617 618 #ifndef __alpha__ 619 int 620 linux_time(struct thread *td, struct linux_time_args *args) 621 { 622 struct timeval tv; 623 l_time_t tm; 624 int error; 625 626 #ifdef DEBUG 627 if (ldebug(time)) 628 printf(ARGS(time, "*")); 629 #endif 630 631 microtime(&tv); 632 tm = tv.tv_sec; 633 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 634 return error; 635 td->td_retval[0] = tm; 636 return 0; 637 } 638 #endif /*!__alpha__*/ 639 640 struct l_times_argv { 641 l_long tms_utime; 642 l_long tms_stime; 643 l_long tms_cutime; 644 l_long tms_cstime; 645 }; 646 647 #ifdef __alpha__ 648 #define CLK_TCK 1024 /* Linux uses 1024 on alpha */ 649 #else 650 #define CLK_TCK 100 /* Linux uses 100 */ 651 #endif 652 653 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 654 655 int 656 linux_times(struct thread *td, struct linux_times_args *args) 657 { 658 struct timeval tv; 659 struct l_times_argv tms; 660 struct rusage ru; 661 int error; 662 663 #ifdef DEBUG 664 if (ldebug(times)) 665 printf(ARGS(times, "*")); 666 #endif 667 668 mtx_lock_spin(&sched_lock); 669 calcru(td->td_proc, &ru.ru_utime, &ru.ru_stime, NULL); 670 mtx_unlock_spin(&sched_lock); 671 672 tms.tms_utime = CONVTCK(ru.ru_utime); 673 tms.tms_stime = CONVTCK(ru.ru_stime); 674 675 tms.tms_cutime = CONVTCK(td->td_proc->p_stats->p_cru.ru_utime); 676 tms.tms_cstime = CONVTCK(td->td_proc->p_stats->p_cru.ru_stime); 677 678 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 679 return error; 680 681 microuptime(&tv); 682 td->td_retval[0] = (int)CONVTCK(tv); 683 return 0; 684 } 685 686 int 687 linux_newuname(struct thread *td, struct linux_newuname_args *args) 688 { 689 struct l_new_utsname utsname; 690 char osname[LINUX_MAX_UTSNAME]; 691 char osrelease[LINUX_MAX_UTSNAME]; 692 693 #ifdef DEBUG 694 if (ldebug(newuname)) 695 printf(ARGS(newuname, "*")); 696 #endif 697 698 linux_get_osname(td, osname); 699 linux_get_osrelease(td, osrelease); 700 701 bzero(&utsname, sizeof(utsname)); 702 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 703 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 704 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 705 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 706 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 707 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 708 709 return (copyout(&utsname, args->buf, sizeof(utsname))); 710 } 711 712 #if defined(__i386__) 713 struct l_utimbuf { 714 l_time_t l_actime; 715 l_time_t l_modtime; 716 }; 717 718 int 719 linux_utime(struct thread *td, struct linux_utime_args *args) 720 { 721 struct timeval tv[2], *tvp; 722 struct l_utimbuf lut; 723 char *fname; 724 int error; 725 726 LCONVPATHEXIST(td, args->fname, &fname); 727 728 #ifdef DEBUG 729 if (ldebug(utime)) 730 printf(ARGS(utime, "%s, *"), fname); 731 #endif 732 733 if (args->times) { 734 if ((error = copyin(args->times, &lut, sizeof lut))) { 735 LFREEPATH(fname); 736 return error; 737 } 738 tv[0].tv_sec = lut.l_actime; 739 tv[0].tv_usec = 0; 740 tv[1].tv_sec = lut.l_modtime; 741 tv[1].tv_usec = 0; 742 tvp = tv; 743 } else 744 tvp = NULL; 745 746 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 747 LFREEPATH(fname); 748 return (error); 749 } 750 #endif /* __i386__ */ 751 752 #define __WCLONE 0x80000000 753 754 #ifndef __alpha__ 755 int 756 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 757 { 758 struct wait_args /* { 759 int pid; 760 int *status; 761 int options; 762 struct rusage *rusage; 763 } */ tmp; 764 int error, tmpstat; 765 766 #ifdef DEBUG 767 if (ldebug(waitpid)) 768 printf(ARGS(waitpid, "%d, %p, %d"), 769 args->pid, (void *)args->status, args->options); 770 #endif 771 772 tmp.pid = args->pid; 773 tmp.status = args->status; 774 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 775 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 776 if (args->options & __WCLONE) 777 tmp.options |= WLINUXCLONE; 778 tmp.rusage = NULL; 779 780 if ((error = wait4(td, &tmp)) != 0) 781 return error; 782 783 if (args->status) { 784 if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0) 785 return error; 786 tmpstat &= 0xffff; 787 if (WIFSIGNALED(tmpstat)) 788 tmpstat = (tmpstat & 0xffffff80) | 789 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 790 else if (WIFSTOPPED(tmpstat)) 791 tmpstat = (tmpstat & 0xffff00ff) | 792 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 793 return copyout(&tmpstat, args->status, sizeof(int)); 794 } 795 796 return 0; 797 } 798 #endif /*!__alpha__*/ 799 800 int 801 linux_wait4(struct thread *td, struct linux_wait4_args *args) 802 { 803 struct wait_args /* { 804 int pid; 805 int *status; 806 int options; 807 struct rusage *rusage; 808 } */ tmp; 809 int error, tmpstat; 810 struct proc *p; 811 812 #ifdef DEBUG 813 if (ldebug(wait4)) 814 printf(ARGS(wait4, "%d, %p, %d, %p"), 815 args->pid, (void *)args->status, args->options, 816 (void *)args->rusage); 817 #endif 818 819 tmp.pid = args->pid; 820 tmp.status = args->status; 821 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 822 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 823 if (args->options & __WCLONE) 824 tmp.options |= WLINUXCLONE; 825 tmp.rusage = (struct rusage *)args->rusage; 826 827 if ((error = wait4(td, &tmp)) != 0) 828 return error; 829 830 p = td->td_proc; 831 PROC_LOCK(p); 832 SIGDELSET(p->p_siglist, SIGCHLD); 833 PROC_UNLOCK(p); 834 835 if (args->status) { 836 if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0) 837 return error; 838 tmpstat &= 0xffff; 839 if (WIFSIGNALED(tmpstat)) 840 tmpstat = (tmpstat & 0xffffff80) | 841 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 842 else if (WIFSTOPPED(tmpstat)) 843 tmpstat = (tmpstat & 0xffff00ff) | 844 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 845 return copyout(&tmpstat, args->status, sizeof(int)); 846 } 847 848 return 0; 849 } 850 851 int 852 linux_mknod(struct thread *td, struct linux_mknod_args *args) 853 { 854 char *path; 855 int error; 856 857 LCONVPATHCREAT(td, args->path, &path); 858 859 #ifdef DEBUG 860 if (ldebug(mknod)) 861 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 862 #endif 863 864 if (args->mode & S_IFIFO) 865 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 866 else 867 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 868 args->dev); 869 LFREEPATH(path); 870 return (error); 871 } 872 873 /* 874 * UGH! This is just about the dumbest idea I've ever heard!! 875 */ 876 int 877 linux_personality(struct thread *td, struct linux_personality_args *args) 878 { 879 #ifdef DEBUG 880 if (ldebug(personality)) 881 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 882 #endif 883 #ifndef __alpha__ 884 if (args->per != 0) 885 return EINVAL; 886 #endif 887 888 /* Yes Jim, it's still a Linux... */ 889 td->td_retval[0] = 0; 890 return 0; 891 } 892 893 /* 894 * Wrappers for get/setitimer for debugging.. 895 */ 896 int 897 linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 898 { 899 struct setitimer_args bsa; 900 struct itimerval foo; 901 int error; 902 903 #ifdef DEBUG 904 if (ldebug(setitimer)) 905 printf(ARGS(setitimer, "%p, %p"), 906 (void *)args->itv, (void *)args->oitv); 907 #endif 908 bsa.which = args->which; 909 bsa.itv = (struct itimerval *)args->itv; 910 bsa.oitv = (struct itimerval *)args->oitv; 911 if (args->itv) { 912 if ((error = copyin(args->itv, &foo, sizeof(foo)))) 913 return error; 914 #ifdef DEBUG 915 if (ldebug(setitimer)) { 916 printf("setitimer: value: sec: %ld, usec: %ld\n", 917 foo.it_value.tv_sec, foo.it_value.tv_usec); 918 printf("setitimer: interval: sec: %ld, usec: %ld\n", 919 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 920 } 921 #endif 922 } 923 return setitimer(td, &bsa); 924 } 925 926 int 927 linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 928 { 929 struct getitimer_args bsa; 930 #ifdef DEBUG 931 if (ldebug(getitimer)) 932 printf(ARGS(getitimer, "%p"), (void *)args->itv); 933 #endif 934 bsa.which = args->which; 935 bsa.itv = (struct itimerval *)args->itv; 936 return getitimer(td, &bsa); 937 } 938 939 #ifndef __alpha__ 940 int 941 linux_nice(struct thread *td, struct linux_nice_args *args) 942 { 943 struct setpriority_args bsd_args; 944 945 bsd_args.which = PRIO_PROCESS; 946 bsd_args.who = 0; /* current process */ 947 bsd_args.prio = args->inc; 948 return setpriority(td, &bsd_args); 949 } 950 #endif /*!__alpha__*/ 951 952 int 953 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 954 { 955 struct ucred *newcred, *oldcred; 956 l_gid_t linux_gidset[NGROUPS]; 957 gid_t *bsd_gidset; 958 int ngrp, error; 959 struct proc *p; 960 961 ngrp = args->gidsetsize; 962 if (ngrp >= NGROUPS) 963 return (EINVAL); 964 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 965 if (error) 966 return (error); 967 newcred = crget(); 968 p = td->td_proc; 969 PROC_LOCK(p); 970 oldcred = p->p_ucred; 971 972 /* 973 * cr_groups[0] holds egid. Setting the whole set from 974 * the supplied set will cause egid to be changed too. 975 * Keep cr_groups[0] unchanged to prevent that. 976 */ 977 978 if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0) { 979 PROC_UNLOCK(p); 980 crfree(newcred); 981 return (error); 982 } 983 984 crcopy(newcred, oldcred); 985 if (ngrp > 0) { 986 newcred->cr_ngroups = ngrp + 1; 987 988 bsd_gidset = newcred->cr_groups; 989 ngrp--; 990 while (ngrp >= 0) { 991 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 992 ngrp--; 993 } 994 } 995 else 996 newcred->cr_ngroups = 1; 997 998 setsugid(p); 999 p->p_ucred = newcred; 1000 PROC_UNLOCK(p); 1001 crfree(oldcred); 1002 return (0); 1003 } 1004 1005 int 1006 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1007 { 1008 struct ucred *cred; 1009 l_gid_t linux_gidset[NGROUPS]; 1010 gid_t *bsd_gidset; 1011 int bsd_gidsetsz, ngrp, error; 1012 1013 cred = td->td_ucred; 1014 bsd_gidset = cred->cr_groups; 1015 bsd_gidsetsz = cred->cr_ngroups - 1; 1016 1017 /* 1018 * cr_groups[0] holds egid. Returning the whole set 1019 * here will cause a duplicate. Exclude cr_groups[0] 1020 * to prevent that. 1021 */ 1022 1023 if ((ngrp = args->gidsetsize) == 0) { 1024 td->td_retval[0] = bsd_gidsetsz; 1025 return (0); 1026 } 1027 1028 if (ngrp < bsd_gidsetsz) 1029 return (EINVAL); 1030 1031 ngrp = 0; 1032 while (ngrp < bsd_gidsetsz) { 1033 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1034 ngrp++; 1035 } 1036 1037 if ((error = copyout(linux_gidset, args->grouplist, 1038 ngrp * sizeof(l_gid_t)))) 1039 return (error); 1040 1041 td->td_retval[0] = ngrp; 1042 return (0); 1043 } 1044 1045 #ifndef __alpha__ 1046 int 1047 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1048 { 1049 struct rlimit bsd_rlim; 1050 struct l_rlimit rlim; 1051 u_int which; 1052 int error; 1053 1054 #ifdef DEBUG 1055 if (ldebug(setrlimit)) 1056 printf(ARGS(setrlimit, "%d, %p"), 1057 args->resource, (void *)args->rlim); 1058 #endif 1059 1060 if (args->resource >= LINUX_RLIM_NLIMITS) 1061 return (EINVAL); 1062 1063 which = linux_to_bsd_resource[args->resource]; 1064 if (which == -1) 1065 return (EINVAL); 1066 1067 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1068 if (error) 1069 return (error); 1070 1071 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1072 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1073 return (dosetrlimit(td, which, &bsd_rlim)); 1074 } 1075 1076 int 1077 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1078 { 1079 struct l_rlimit rlim; 1080 struct proc *p = td->td_proc; 1081 struct rlimit *bsd_rlp; 1082 u_int which; 1083 1084 #ifdef DEBUG 1085 if (ldebug(old_getrlimit)) 1086 printf(ARGS(old_getrlimit, "%d, %p"), 1087 args->resource, (void *)args->rlim); 1088 #endif 1089 1090 if (args->resource >= LINUX_RLIM_NLIMITS) 1091 return (EINVAL); 1092 1093 which = linux_to_bsd_resource[args->resource]; 1094 if (which == -1) 1095 return (EINVAL); 1096 bsd_rlp = &p->p_rlimit[which]; 1097 1098 rlim.rlim_cur = (unsigned long)bsd_rlp->rlim_cur; 1099 if (rlim.rlim_cur == ULONG_MAX) 1100 rlim.rlim_cur = LONG_MAX; 1101 rlim.rlim_max = (unsigned long)bsd_rlp->rlim_max; 1102 if (rlim.rlim_max == ULONG_MAX) 1103 rlim.rlim_max = LONG_MAX; 1104 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1105 } 1106 1107 int 1108 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1109 { 1110 struct l_rlimit rlim; 1111 struct proc *p = td->td_proc; 1112 struct rlimit *bsd_rlp; 1113 u_int which; 1114 1115 #ifdef DEBUG 1116 if (ldebug(getrlimit)) 1117 printf(ARGS(getrlimit, "%d, %p"), 1118 args->resource, (void *)args->rlim); 1119 #endif 1120 1121 if (args->resource >= LINUX_RLIM_NLIMITS) 1122 return (EINVAL); 1123 1124 which = linux_to_bsd_resource[args->resource]; 1125 if (which == -1) 1126 return (EINVAL); 1127 bsd_rlp = &p->p_rlimit[which]; 1128 1129 rlim.rlim_cur = (l_ulong)bsd_rlp->rlim_cur; 1130 rlim.rlim_max = (l_ulong)bsd_rlp->rlim_max; 1131 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1132 } 1133 #endif /*!__alpha__*/ 1134 1135 int 1136 linux_sched_setscheduler(struct thread *td, 1137 struct linux_sched_setscheduler_args *args) 1138 { 1139 struct sched_setscheduler_args bsd; 1140 1141 #ifdef DEBUG 1142 if (ldebug(sched_setscheduler)) 1143 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1144 args->pid, args->policy, (const void *)args->param); 1145 #endif 1146 1147 switch (args->policy) { 1148 case LINUX_SCHED_OTHER: 1149 bsd.policy = SCHED_OTHER; 1150 break; 1151 case LINUX_SCHED_FIFO: 1152 bsd.policy = SCHED_FIFO; 1153 break; 1154 case LINUX_SCHED_RR: 1155 bsd.policy = SCHED_RR; 1156 break; 1157 default: 1158 return EINVAL; 1159 } 1160 1161 bsd.pid = args->pid; 1162 bsd.param = (struct sched_param *)args->param; 1163 return sched_setscheduler(td, &bsd); 1164 } 1165 1166 int 1167 linux_sched_getscheduler(struct thread *td, 1168 struct linux_sched_getscheduler_args *args) 1169 { 1170 struct sched_getscheduler_args bsd; 1171 int error; 1172 1173 #ifdef DEBUG 1174 if (ldebug(sched_getscheduler)) 1175 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1176 #endif 1177 1178 bsd.pid = args->pid; 1179 error = sched_getscheduler(td, &bsd); 1180 1181 switch (td->td_retval[0]) { 1182 case SCHED_OTHER: 1183 td->td_retval[0] = LINUX_SCHED_OTHER; 1184 break; 1185 case SCHED_FIFO: 1186 td->td_retval[0] = LINUX_SCHED_FIFO; 1187 break; 1188 case SCHED_RR: 1189 td->td_retval[0] = LINUX_SCHED_RR; 1190 break; 1191 } 1192 1193 return error; 1194 } 1195 1196 int 1197 linux_sched_get_priority_max(struct thread *td, 1198 struct linux_sched_get_priority_max_args *args) 1199 { 1200 struct sched_get_priority_max_args bsd; 1201 1202 #ifdef DEBUG 1203 if (ldebug(sched_get_priority_max)) 1204 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1205 #endif 1206 1207 switch (args->policy) { 1208 case LINUX_SCHED_OTHER: 1209 bsd.policy = SCHED_OTHER; 1210 break; 1211 case LINUX_SCHED_FIFO: 1212 bsd.policy = SCHED_FIFO; 1213 break; 1214 case LINUX_SCHED_RR: 1215 bsd.policy = SCHED_RR; 1216 break; 1217 default: 1218 return EINVAL; 1219 } 1220 return sched_get_priority_max(td, &bsd); 1221 } 1222 1223 int 1224 linux_sched_get_priority_min(struct thread *td, 1225 struct linux_sched_get_priority_min_args *args) 1226 { 1227 struct sched_get_priority_min_args bsd; 1228 1229 #ifdef DEBUG 1230 if (ldebug(sched_get_priority_min)) 1231 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1232 #endif 1233 1234 switch (args->policy) { 1235 case LINUX_SCHED_OTHER: 1236 bsd.policy = SCHED_OTHER; 1237 break; 1238 case LINUX_SCHED_FIFO: 1239 bsd.policy = SCHED_FIFO; 1240 break; 1241 case LINUX_SCHED_RR: 1242 bsd.policy = SCHED_RR; 1243 break; 1244 default: 1245 return EINVAL; 1246 } 1247 return sched_get_priority_min(td, &bsd); 1248 } 1249 1250 #define REBOOT_CAD_ON 0x89abcdef 1251 #define REBOOT_CAD_OFF 0 1252 #define REBOOT_HALT 0xcdef0123 1253 1254 int 1255 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1256 { 1257 struct reboot_args bsd_args; 1258 1259 #ifdef DEBUG 1260 if (ldebug(reboot)) 1261 printf(ARGS(reboot, "0x%x"), args->cmd); 1262 #endif 1263 if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF) 1264 return (0); 1265 bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0; 1266 return (reboot(td, &bsd_args)); 1267 } 1268 1269 #ifndef __alpha__ 1270 1271 /* 1272 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1273 * td->td_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This 1274 * globbers registers that are assumed to be preserved. The following 1275 * lightweight syscalls fixes this. See also linux_getgid16() and 1276 * linux_getuid16() in linux_uid16.c. 1277 * 1278 * linux_getpid() - MP SAFE 1279 * linux_getgid() - MP SAFE 1280 * linux_getuid() - MP SAFE 1281 */ 1282 1283 int 1284 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1285 { 1286 1287 td->td_retval[0] = td->td_proc->p_pid; 1288 return (0); 1289 } 1290 1291 int 1292 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1293 { 1294 1295 td->td_retval[0] = td->td_ucred->cr_rgid; 1296 return (0); 1297 } 1298 1299 int 1300 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1301 { 1302 1303 td->td_retval[0] = td->td_ucred->cr_ruid; 1304 return (0); 1305 } 1306 1307 #endif /*!__alpha__*/ 1308 1309 int 1310 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1311 { 1312 struct getsid_args bsd; 1313 bsd.pid = args->pid; 1314 return getsid(td, &bsd); 1315 } 1316