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 * $FreeBSD$ 29 */ 30 31 #include "opt_mac.h" 32 33 #include <sys/param.h> 34 #include <sys/blist.h> 35 #include <sys/fcntl.h> 36 #include <sys/imgact_aout.h> 37 #include <sys/jail.h> 38 #include <sys/kernel.h> 39 #include <sys/limits.h> 40 #include <sys/lock.h> 41 #include <sys/mac.h> 42 #include <sys/malloc.h> 43 #include <sys/mman.h> 44 #include <sys/mount.h> 45 #include <sys/mutex.h> 46 #include <sys/namei.h> 47 #include <sys/proc.h> 48 #include <sys/reboot.h> 49 #include <sys/resourcevar.h> 50 #include <sys/signalvar.h> 51 #include <sys/stat.h> 52 #include <sys/syscallsubr.h> 53 #include <sys/sysctl.h> 54 #include <sys/sysproto.h> 55 #include <sys/systm.h> 56 #include <sys/time.h> 57 #include <sys/vmmeter.h> 58 #include <sys/vnode.h> 59 #include <sys/wait.h> 60 61 #include <vm/vm.h> 62 #include <vm/pmap.h> 63 #include <vm/vm_kern.h> 64 #include <vm/vm_map.h> 65 #include <vm/vm_extern.h> 66 #include <vm/vm_object.h> 67 #include <vm/swap_pager.h> 68 69 #include <posix4/sched.h> 70 71 #include <machine/../linux/linux.h> 72 #include <machine/../linux/linux_proto.h> 73 74 #include <compat/linux/linux_mib.h> 75 #include <compat/linux/linux_util.h> 76 77 #ifdef __alpha__ 78 #define BSD_TO_LINUX_SIGNAL(sig) (sig) 79 #else 80 #define BSD_TO_LINUX_SIGNAL(sig) \ 81 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 82 #endif 83 84 #ifndef __alpha__ 85 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 86 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 87 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 88 RLIMIT_MEMLOCK, -1 89 }; 90 #endif /*!__alpha__*/ 91 92 struct l_sysinfo { 93 l_long uptime; /* Seconds since boot */ 94 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 95 l_ulong totalram; /* Total usable main memory size */ 96 l_ulong freeram; /* Available memory size */ 97 l_ulong sharedram; /* Amount of shared memory */ 98 l_ulong bufferram; /* Memory used by buffers */ 99 l_ulong totalswap; /* Total swap space size */ 100 l_ulong freeswap; /* swap space still available */ 101 l_ushort procs; /* Number of current processes */ 102 char _f[22]; /* Pads structure to 64 bytes */ 103 }; 104 #ifndef __alpha__ 105 int 106 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 107 { 108 struct l_sysinfo sysinfo; 109 vm_object_t object; 110 int i; 111 struct timespec ts; 112 113 /* Uptime is copied out of print_uptime() in kern_shutdown.c */ 114 getnanouptime(&ts); 115 i = 0; 116 if (ts.tv_sec >= 86400) { 117 ts.tv_sec %= 86400; 118 i = 1; 119 } 120 if (i || ts.tv_sec >= 3600) { 121 ts.tv_sec %= 3600; 122 i = 1; 123 } 124 if (i || ts.tv_sec >= 60) { 125 ts.tv_sec %= 60; 126 i = 1; 127 } 128 sysinfo.uptime=ts.tv_sec; 129 130 /* Use the information from the mib to get our load averages */ 131 for (i = 0; i < 3; i++) 132 sysinfo.loads[i] = averunnable.ldavg[i]; 133 134 sysinfo.totalram = physmem * PAGE_SIZE; 135 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 136 137 sysinfo.sharedram = 0; 138 for (object = TAILQ_FIRST(&vm_object_list); object != NULL; 139 object = TAILQ_NEXT(object, object_list)) 140 if (object->shadow_count > 1) 141 sysinfo.sharedram += object->resident_page_count; 142 143 sysinfo.sharedram *= PAGE_SIZE; 144 sysinfo.bufferram = 0; 145 146 if (swapblist == NULL) { 147 sysinfo.totalswap= 0; 148 sysinfo.freeswap = 0; 149 } else { 150 sysinfo.totalswap = swapblist->bl_blocks * 1024; 151 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE; 152 } 153 154 sysinfo.procs = 20; /* Hack */ 155 156 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 157 } 158 #endif /*!__alpha__*/ 159 160 #ifndef __alpha__ 161 int 162 linux_alarm(struct thread *td, struct linux_alarm_args *args) 163 { 164 struct itimerval it, old_it; 165 struct timeval tv; 166 struct proc *p; 167 168 #ifdef DEBUG 169 if (ldebug(alarm)) 170 printf(ARGS(alarm, "%u"), args->secs); 171 #endif 172 173 if (args->secs > 100000000) 174 return EINVAL; 175 176 it.it_value.tv_sec = (long)args->secs; 177 it.it_value.tv_usec = 0; 178 it.it_interval.tv_sec = 0; 179 it.it_interval.tv_usec = 0; 180 p = td->td_proc; 181 PROC_LOCK(p); 182 old_it = p->p_realtimer; 183 getmicrouptime(&tv); 184 if (timevalisset(&old_it.it_value)) 185 callout_stop(&p->p_itcallout); 186 if (it.it_value.tv_sec != 0) { 187 callout_reset(&p->p_itcallout, tvtohz(&it.it_value), 188 realitexpire, p); 189 timevaladd(&it.it_value, &tv); 190 } 191 p->p_realtimer = it; 192 PROC_UNLOCK(p); 193 if (timevalcmp(&old_it.it_value, &tv, >)) { 194 timevalsub(&old_it.it_value, &tv); 195 if (old_it.it_value.tv_usec != 0) 196 old_it.it_value.tv_sec++; 197 td->td_retval[0] = old_it.it_value.tv_sec; 198 } 199 return 0; 200 } 201 #endif /*!__alpha__*/ 202 203 int 204 linux_brk(struct thread *td, struct linux_brk_args *args) 205 { 206 struct vmspace *vm = td->td_proc->p_vmspace; 207 vm_offset_t new, old; 208 struct obreak_args /* { 209 char * nsize; 210 } */ tmp; 211 212 #ifdef DEBUG 213 if (ldebug(brk)) 214 printf(ARGS(brk, "%p"), (void *)args->dsend); 215 #endif 216 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 217 new = (vm_offset_t)args->dsend; 218 tmp.nsize = (char *) new; 219 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 220 td->td_retval[0] = (long)new; 221 else 222 td->td_retval[0] = (long)old; 223 224 return 0; 225 } 226 227 int 228 linux_uselib(struct thread *td, struct linux_uselib_args *args) 229 { 230 struct nameidata ni; 231 struct vnode *vp; 232 struct exec *a_out; 233 struct vattr attr; 234 vm_offset_t vmaddr; 235 unsigned long file_offset; 236 vm_offset_t buffer; 237 unsigned long bss_size; 238 char *library; 239 int error; 240 int locked; 241 242 LCONVPATHEXIST(td, args->library, &library); 243 244 #ifdef DEBUG 245 if (ldebug(uselib)) 246 printf(ARGS(uselib, "%s"), library); 247 #endif 248 249 a_out = NULL; 250 locked = 0; 251 vp = NULL; 252 253 /* 254 * XXX: This code should make use of vn_open(), rather than doing 255 * all this stuff itself. 256 */ 257 NDINIT(&ni, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, library, td); 258 error = namei(&ni); 259 LFREEPATH(library); 260 if (error) 261 goto cleanup; 262 263 vp = ni.ni_vp; 264 /* 265 * XXX - This looks like a bogus check. A LOCKLEAF namei should not 266 * succeed without returning a vnode. 267 */ 268 if (vp == NULL) { 269 error = ENOEXEC; /* ?? */ 270 goto cleanup; 271 } 272 NDFREE(&ni, NDF_ONLY_PNBUF); 273 274 /* 275 * From here on down, we have a locked vnode that must be unlocked. 276 */ 277 locked++; 278 279 /* Writable? */ 280 if (vp->v_writecount) { 281 error = ETXTBSY; 282 goto cleanup; 283 } 284 285 /* Executable? */ 286 error = VOP_GETATTR(vp, &attr, td->td_ucred, td); 287 if (error) 288 goto cleanup; 289 290 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 291 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 292 error = ENOEXEC; 293 goto cleanup; 294 } 295 296 /* Sensible size? */ 297 if (attr.va_size == 0) { 298 error = ENOEXEC; 299 goto cleanup; 300 } 301 302 /* Can we access it? */ 303 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 304 if (error) 305 goto cleanup; 306 307 /* 308 * XXX: This should use vn_open() so that it is properly authorized, 309 * and to reduce code redundancy all over the place here. 310 */ 311 #ifdef MAC 312 error = mac_check_vnode_open(td->td_ucred, vp, FREAD); 313 if (error) 314 goto cleanup; 315 #endif 316 error = VOP_OPEN(vp, FREAD, td->td_ucred, td); 317 if (error) 318 goto cleanup; 319 320 /* Pull in executable header into kernel_map */ 321 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 322 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 323 /* 324 * Lock no longer needed 325 */ 326 locked = 0; 327 VOP_UNLOCK(vp, 0, td); 328 329 if (error) 330 goto cleanup; 331 332 /* Is it a Linux binary ? */ 333 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 334 error = ENOEXEC; 335 goto cleanup; 336 } 337 338 /* 339 * While we are here, we should REALLY do some more checks 340 */ 341 342 /* Set file/virtual offset based on a.out variant. */ 343 switch ((int)(a_out->a_magic & 0xffff)) { 344 case 0413: /* ZMAGIC */ 345 file_offset = 1024; 346 break; 347 case 0314: /* QMAGIC */ 348 file_offset = 0; 349 break; 350 default: 351 error = ENOEXEC; 352 goto cleanup; 353 } 354 355 bss_size = round_page(a_out->a_bss); 356 357 /* Check various fields in header for validity/bounds. */ 358 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 359 error = ENOEXEC; 360 goto cleanup; 361 } 362 363 /* text + data can't exceed file size */ 364 if (a_out->a_data + a_out->a_text > attr.va_size) { 365 error = EFAULT; 366 goto cleanup; 367 } 368 369 /* To protect td->td_proc->p_rlimit in the if condition. */ 370 mtx_assert(&Giant, MA_OWNED); 371 372 /* 373 * text/data/bss must not exceed limits 374 * XXX - this is not complete. it should check current usage PLUS 375 * the resources needed by this library. 376 */ 377 if (a_out->a_text > maxtsiz || 378 a_out->a_data + bss_size > 379 td->td_proc->p_rlimit[RLIMIT_DATA].rlim_cur) { 380 error = ENOMEM; 381 goto cleanup; 382 } 383 384 mp_fixme("Unlocked vflags access."); 385 /* prevent more writers */ 386 vp->v_vflag |= VV_TEXT; 387 388 /* 389 * Check if file_offset page aligned. Currently we cannot handle 390 * misalinged file offsets, and so we read in the entire image 391 * (what a waste). 392 */ 393 if (file_offset & PAGE_MASK) { 394 #ifdef DEBUG 395 printf("uselib: Non page aligned binary %lu\n", file_offset); 396 #endif 397 /* Map text+data read/write/execute */ 398 399 /* a_entry is the load address and is page aligned */ 400 vmaddr = trunc_page(a_out->a_entry); 401 402 /* get anon user mapping, read+write+execute */ 403 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 404 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 405 VM_PROT_ALL, 0); 406 if (error) 407 goto cleanup; 408 409 /* map file into kernel_map */ 410 error = vm_mmap(kernel_map, &buffer, 411 round_page(a_out->a_text + a_out->a_data + file_offset), 412 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 413 trunc_page(file_offset)); 414 if (error) 415 goto cleanup; 416 417 /* copy from kernel VM space to user space */ 418 error = copyout((void *)(buffer + file_offset), 419 (void *)vmaddr, a_out->a_text + a_out->a_data); 420 421 /* release temporary kernel space */ 422 vm_map_remove(kernel_map, buffer, buffer + 423 round_page(a_out->a_text + a_out->a_data + file_offset)); 424 425 if (error) 426 goto cleanup; 427 } else { 428 #ifdef DEBUG 429 printf("uselib: Page aligned binary %lu\n", file_offset); 430 #endif 431 /* 432 * for QMAGIC, a_entry is 20 bytes beyond the load address 433 * to skip the executable header 434 */ 435 vmaddr = trunc_page(a_out->a_entry); 436 437 /* 438 * Map it all into the process's space as a single 439 * copy-on-write "data" segment. 440 */ 441 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 442 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 443 MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset); 444 if (error) 445 goto cleanup; 446 } 447 #ifdef DEBUG 448 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0], 449 ((long*)vmaddr)[1]); 450 #endif 451 if (bss_size != 0) { 452 /* Calculate BSS start address */ 453 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 454 a_out->a_data; 455 456 /* allocate some 'anon' space */ 457 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 458 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 459 if (error) 460 goto cleanup; 461 } 462 463 cleanup: 464 /* Unlock vnode if needed */ 465 if (locked) 466 VOP_UNLOCK(vp, 0, td); 467 468 /* Release the kernel mapping. */ 469 if (a_out) 470 vm_map_remove(kernel_map, (vm_offset_t)a_out, 471 (vm_offset_t)a_out + PAGE_SIZE); 472 473 return error; 474 } 475 476 int 477 linux_select(struct thread *td, struct linux_select_args *args) 478 { 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, &utv, sizeof(utv)))) 495 goto select_out; 496 #ifdef DEBUG 497 if (ldebug(select)) 498 printf(LMSG("incoming timeout (%ld/%ld)"), 499 utv.tv_sec, utv.tv_usec); 500 #endif 501 502 if (itimerfix(&utv)) { 503 /* 504 * The timeval was invalid. Convert it to something 505 * valid that will act as it does under Linux. 506 */ 507 utv.tv_sec += utv.tv_usec / 1000000; 508 utv.tv_usec %= 1000000; 509 if (utv.tv_usec < 0) { 510 utv.tv_sec -= 1; 511 utv.tv_usec += 1000000; 512 } 513 if (utv.tv_sec < 0) 514 timevalclear(&utv); 515 } 516 microtime(&tv0); 517 tvp = &utv; 518 } else 519 tvp = NULL; 520 521 error = kern_select(td, args->nfds, args->readfds, args->writefds, 522 args->exceptfds, tvp); 523 524 #ifdef DEBUG 525 if (ldebug(select)) 526 printf(LMSG("real select returns %d"), error); 527 #endif 528 if (error) { 529 /* 530 * See fs/select.c in the Linux kernel. Without this, 531 * Maelstrom doesn't work. 532 */ 533 if (error == ERESTART) 534 error = EINTR; 535 goto select_out; 536 } 537 538 if (args->timeout) { 539 if (td->td_retval[0]) { 540 /* 541 * Compute how much time was left of the timeout, 542 * by subtracting the current time and the time 543 * before we started the call, and subtracting 544 * that result from the user-supplied value. 545 */ 546 microtime(&tv1); 547 timevalsub(&tv1, &tv0); 548 timevalsub(&utv, &tv1); 549 if (utv.tv_sec < 0) 550 timevalclear(&utv); 551 } else 552 timevalclear(&utv); 553 #ifdef DEBUG 554 if (ldebug(select)) 555 printf(LMSG("outgoing timeout (%ld/%ld)"), 556 utv.tv_sec, utv.tv_usec); 557 #endif 558 if ((error = copyout(&utv, args->timeout, sizeof(utv)))) 559 goto select_out; 560 } 561 562 select_out: 563 #ifdef DEBUG 564 if (ldebug(select)) 565 printf(LMSG("select_out -> %d"), error); 566 #endif 567 return error; 568 } 569 570 int 571 linux_mremap(struct thread *td, struct linux_mremap_args *args) 572 { 573 struct munmap_args /* { 574 void *addr; 575 size_t len; 576 } */ bsd_args; 577 int error = 0; 578 579 #ifdef DEBUG 580 if (ldebug(mremap)) 581 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 582 (void *)args->addr, 583 (unsigned long)args->old_len, 584 (unsigned long)args->new_len, 585 (unsigned long)args->flags); 586 #endif 587 args->new_len = round_page(args->new_len); 588 args->old_len = round_page(args->old_len); 589 590 if (args->new_len > args->old_len) { 591 td->td_retval[0] = 0; 592 return ENOMEM; 593 } 594 595 if (args->new_len < args->old_len) { 596 bsd_args.addr = (caddr_t)(args->addr + args->new_len); 597 bsd_args.len = args->old_len - args->new_len; 598 error = munmap(td, &bsd_args); 599 } 600 601 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 602 return error; 603 } 604 605 #define LINUX_MS_ASYNC 0x0001 606 #define LINUX_MS_INVALIDATE 0x0002 607 #define LINUX_MS_SYNC 0x0004 608 609 int 610 linux_msync(struct thread *td, struct linux_msync_args *args) 611 { 612 struct msync_args bsd_args; 613 614 bsd_args.addr = (caddr_t)args->addr; 615 bsd_args.len = args->len; 616 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 617 618 return msync(td, &bsd_args); 619 } 620 621 #ifndef __alpha__ 622 int 623 linux_time(struct thread *td, struct linux_time_args *args) 624 { 625 struct timeval tv; 626 l_time_t tm; 627 int error; 628 629 #ifdef DEBUG 630 if (ldebug(time)) 631 printf(ARGS(time, "*")); 632 #endif 633 634 microtime(&tv); 635 tm = tv.tv_sec; 636 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 637 return error; 638 td->td_retval[0] = tm; 639 return 0; 640 } 641 #endif /*!__alpha__*/ 642 643 struct l_times_argv { 644 l_long tms_utime; 645 l_long tms_stime; 646 l_long tms_cutime; 647 l_long tms_cstime; 648 }; 649 650 #ifdef __alpha__ 651 #define CLK_TCK 1024 /* Linux uses 1024 on alpha */ 652 #else 653 #define CLK_TCK 100 /* Linux uses 100 */ 654 #endif 655 656 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 657 658 int 659 linux_times(struct thread *td, struct linux_times_args *args) 660 { 661 struct timeval tv; 662 struct l_times_argv tms; 663 struct rusage ru; 664 int error; 665 666 #ifdef DEBUG 667 if (ldebug(times)) 668 printf(ARGS(times, "*")); 669 #endif 670 671 mtx_lock_spin(&sched_lock); 672 calcru(td->td_proc, &ru.ru_utime, &ru.ru_stime, NULL); 673 mtx_unlock_spin(&sched_lock); 674 675 tms.tms_utime = CONVTCK(ru.ru_utime); 676 tms.tms_stime = CONVTCK(ru.ru_stime); 677 678 tms.tms_cutime = CONVTCK(td->td_proc->p_stats->p_cru.ru_utime); 679 tms.tms_cstime = CONVTCK(td->td_proc->p_stats->p_cru.ru_stime); 680 681 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 682 return error; 683 684 microuptime(&tv); 685 td->td_retval[0] = (int)CONVTCK(tv); 686 return 0; 687 } 688 689 int 690 linux_newuname(struct thread *td, struct linux_newuname_args *args) 691 { 692 struct l_new_utsname utsname; 693 char osname[LINUX_MAX_UTSNAME]; 694 char osrelease[LINUX_MAX_UTSNAME]; 695 696 #ifdef DEBUG 697 if (ldebug(newuname)) 698 printf(ARGS(newuname, "*")); 699 #endif 700 701 linux_get_osname(td, osname); 702 linux_get_osrelease(td, osrelease); 703 704 bzero(&utsname, sizeof(utsname)); 705 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 706 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 707 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 708 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 709 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 710 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 711 712 return (copyout(&utsname, args->buf, sizeof(utsname))); 713 } 714 715 #if defined(__i386__) 716 struct l_utimbuf { 717 l_time_t l_actime; 718 l_time_t l_modtime; 719 }; 720 721 int 722 linux_utime(struct thread *td, struct linux_utime_args *args) 723 { 724 struct timeval tv[2], *tvp; 725 struct l_utimbuf lut; 726 char *fname; 727 int error; 728 729 LCONVPATHEXIST(td, args->fname, &fname); 730 731 #ifdef DEBUG 732 if (ldebug(utime)) 733 printf(ARGS(utime, "%s, *"), fname); 734 #endif 735 736 if (args->times) { 737 if ((error = copyin(args->times, &lut, sizeof lut))) { 738 LFREEPATH(fname); 739 return error; 740 } 741 tv[0].tv_sec = lut.l_actime; 742 tv[0].tv_usec = 0; 743 tv[1].tv_sec = lut.l_modtime; 744 tv[1].tv_usec = 0; 745 tvp = tv; 746 } else 747 tvp = NULL; 748 749 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 750 LFREEPATH(fname); 751 return (error); 752 } 753 #endif /* __i386__ */ 754 755 #define __WCLONE 0x80000000 756 757 #ifndef __alpha__ 758 int 759 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 760 { 761 struct wait_args /* { 762 int pid; 763 int *status; 764 int options; 765 struct rusage *rusage; 766 } */ tmp; 767 int error, tmpstat; 768 769 #ifdef DEBUG 770 if (ldebug(waitpid)) 771 printf(ARGS(waitpid, "%d, %p, %d"), 772 args->pid, (void *)args->status, args->options); 773 #endif 774 775 tmp.pid = args->pid; 776 tmp.status = args->status; 777 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 778 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 779 if (args->options & __WCLONE) 780 tmp.options |= WLINUXCLONE; 781 tmp.rusage = NULL; 782 783 if ((error = wait4(td, &tmp)) != 0) 784 return error; 785 786 if (args->status) { 787 if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0) 788 return error; 789 tmpstat &= 0xffff; 790 if (WIFSIGNALED(tmpstat)) 791 tmpstat = (tmpstat & 0xffffff80) | 792 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 793 else if (WIFSTOPPED(tmpstat)) 794 tmpstat = (tmpstat & 0xffff00ff) | 795 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 796 return copyout(&tmpstat, args->status, sizeof(int)); 797 } 798 799 return 0; 800 } 801 #endif /*!__alpha__*/ 802 803 int 804 linux_wait4(struct thread *td, struct linux_wait4_args *args) 805 { 806 struct wait_args /* { 807 int pid; 808 int *status; 809 int options; 810 struct rusage *rusage; 811 } */ tmp; 812 int error, tmpstat; 813 struct proc *p; 814 815 #ifdef DEBUG 816 if (ldebug(wait4)) 817 printf(ARGS(wait4, "%d, %p, %d, %p"), 818 args->pid, (void *)args->status, args->options, 819 (void *)args->rusage); 820 #endif 821 822 tmp.pid = args->pid; 823 tmp.status = args->status; 824 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 825 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 826 if (args->options & __WCLONE) 827 tmp.options |= WLINUXCLONE; 828 tmp.rusage = (struct rusage *)args->rusage; 829 830 if ((error = wait4(td, &tmp)) != 0) 831 return error; 832 833 p = td->td_proc; 834 PROC_LOCK(p); 835 SIGDELSET(p->p_siglist, SIGCHLD); 836 PROC_UNLOCK(p); 837 838 if (args->status) { 839 if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0) 840 return error; 841 tmpstat &= 0xffff; 842 if (WIFSIGNALED(tmpstat)) 843 tmpstat = (tmpstat & 0xffffff80) | 844 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 845 else if (WIFSTOPPED(tmpstat)) 846 tmpstat = (tmpstat & 0xffff00ff) | 847 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 848 return copyout(&tmpstat, args->status, sizeof(int)); 849 } 850 851 return 0; 852 } 853 854 int 855 linux_mknod(struct thread *td, struct linux_mknod_args *args) 856 { 857 char *path; 858 int error; 859 860 LCONVPATHCREAT(td, args->path, &path); 861 862 #ifdef DEBUG 863 if (ldebug(mknod)) 864 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 865 #endif 866 867 if (args->mode & S_IFIFO) 868 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 869 else 870 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 871 args->dev); 872 LFREEPATH(path); 873 return (error); 874 } 875 876 /* 877 * UGH! This is just about the dumbest idea I've ever heard!! 878 */ 879 int 880 linux_personality(struct thread *td, struct linux_personality_args *args) 881 { 882 #ifdef DEBUG 883 if (ldebug(personality)) 884 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 885 #endif 886 #ifndef __alpha__ 887 if (args->per != 0) 888 return EINVAL; 889 #endif 890 891 /* Yes Jim, it's still a Linux... */ 892 td->td_retval[0] = 0; 893 return 0; 894 } 895 896 /* 897 * Wrappers for get/setitimer for debugging.. 898 */ 899 int 900 linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 901 { 902 struct setitimer_args bsa; 903 struct itimerval foo; 904 int error; 905 906 #ifdef DEBUG 907 if (ldebug(setitimer)) 908 printf(ARGS(setitimer, "%p, %p"), 909 (void *)args->itv, (void *)args->oitv); 910 #endif 911 bsa.which = args->which; 912 bsa.itv = (struct itimerval *)args->itv; 913 bsa.oitv = (struct itimerval *)args->oitv; 914 if (args->itv) { 915 if ((error = copyin(args->itv, &foo, sizeof(foo)))) 916 return error; 917 #ifdef DEBUG 918 if (ldebug(setitimer)) { 919 printf("setitimer: value: sec: %ld, usec: %ld\n", 920 foo.it_value.tv_sec, foo.it_value.tv_usec); 921 printf("setitimer: interval: sec: %ld, usec: %ld\n", 922 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 923 } 924 #endif 925 } 926 return setitimer(td, &bsa); 927 } 928 929 int 930 linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 931 { 932 struct getitimer_args bsa; 933 #ifdef DEBUG 934 if (ldebug(getitimer)) 935 printf(ARGS(getitimer, "%p"), (void *)args->itv); 936 #endif 937 bsa.which = args->which; 938 bsa.itv = (struct itimerval *)args->itv; 939 return getitimer(td, &bsa); 940 } 941 942 #ifndef __alpha__ 943 int 944 linux_nice(struct thread *td, struct linux_nice_args *args) 945 { 946 struct setpriority_args bsd_args; 947 948 bsd_args.which = PRIO_PROCESS; 949 bsd_args.who = 0; /* current process */ 950 bsd_args.prio = args->inc; 951 return setpriority(td, &bsd_args); 952 } 953 #endif /*!__alpha__*/ 954 955 int 956 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 957 { 958 struct ucred *newcred, *oldcred; 959 l_gid_t linux_gidset[NGROUPS]; 960 gid_t *bsd_gidset; 961 int ngrp, error; 962 struct proc *p; 963 964 ngrp = args->gidsetsize; 965 if (ngrp >= NGROUPS) 966 return (EINVAL); 967 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 968 if (error) 969 return (error); 970 newcred = crget(); 971 p = td->td_proc; 972 PROC_LOCK(p); 973 oldcred = p->p_ucred; 974 975 /* 976 * cr_groups[0] holds egid. Setting the whole set from 977 * the supplied set will cause egid to be changed too. 978 * Keep cr_groups[0] unchanged to prevent that. 979 */ 980 981 if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0) { 982 PROC_UNLOCK(p); 983 crfree(newcred); 984 return (error); 985 } 986 987 crcopy(newcred, oldcred); 988 if (ngrp > 0) { 989 newcred->cr_ngroups = ngrp + 1; 990 991 bsd_gidset = newcred->cr_groups; 992 ngrp--; 993 while (ngrp >= 0) { 994 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 995 ngrp--; 996 } 997 } 998 else 999 newcred->cr_ngroups = 1; 1000 1001 setsugid(p); 1002 p->p_ucred = newcred; 1003 PROC_UNLOCK(p); 1004 crfree(oldcred); 1005 return (0); 1006 } 1007 1008 int 1009 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1010 { 1011 struct ucred *cred; 1012 l_gid_t linux_gidset[NGROUPS]; 1013 gid_t *bsd_gidset; 1014 int bsd_gidsetsz, ngrp, error; 1015 1016 cred = td->td_ucred; 1017 bsd_gidset = cred->cr_groups; 1018 bsd_gidsetsz = cred->cr_ngroups - 1; 1019 1020 /* 1021 * cr_groups[0] holds egid. Returning the whole set 1022 * here will cause a duplicate. Exclude cr_groups[0] 1023 * to prevent that. 1024 */ 1025 1026 if ((ngrp = args->gidsetsize) == 0) { 1027 td->td_retval[0] = bsd_gidsetsz; 1028 return (0); 1029 } 1030 1031 if (ngrp < bsd_gidsetsz) 1032 return (EINVAL); 1033 1034 ngrp = 0; 1035 while (ngrp < bsd_gidsetsz) { 1036 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1037 ngrp++; 1038 } 1039 1040 if ((error = copyout(linux_gidset, args->grouplist, 1041 ngrp * sizeof(l_gid_t)))) 1042 return (error); 1043 1044 td->td_retval[0] = ngrp; 1045 return (0); 1046 } 1047 1048 #ifndef __alpha__ 1049 int 1050 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1051 { 1052 struct rlimit bsd_rlim; 1053 struct l_rlimit rlim; 1054 u_int which; 1055 int error; 1056 1057 #ifdef DEBUG 1058 if (ldebug(setrlimit)) 1059 printf(ARGS(setrlimit, "%d, %p"), 1060 args->resource, (void *)args->rlim); 1061 #endif 1062 1063 if (args->resource >= LINUX_RLIM_NLIMITS) 1064 return (EINVAL); 1065 1066 which = linux_to_bsd_resource[args->resource]; 1067 if (which == -1) 1068 return (EINVAL); 1069 1070 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1071 if (error) 1072 return (error); 1073 1074 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1075 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1076 return (dosetrlimit(td, which, &bsd_rlim)); 1077 } 1078 1079 int 1080 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1081 { 1082 struct l_rlimit rlim; 1083 struct proc *p = td->td_proc; 1084 struct rlimit *bsd_rlp; 1085 u_int which; 1086 1087 #ifdef DEBUG 1088 if (ldebug(old_getrlimit)) 1089 printf(ARGS(old_getrlimit, "%d, %p"), 1090 args->resource, (void *)args->rlim); 1091 #endif 1092 1093 if (args->resource >= LINUX_RLIM_NLIMITS) 1094 return (EINVAL); 1095 1096 which = linux_to_bsd_resource[args->resource]; 1097 if (which == -1) 1098 return (EINVAL); 1099 bsd_rlp = &p->p_rlimit[which]; 1100 1101 rlim.rlim_cur = (unsigned long)bsd_rlp->rlim_cur; 1102 if (rlim.rlim_cur == ULONG_MAX) 1103 rlim.rlim_cur = LONG_MAX; 1104 rlim.rlim_max = (unsigned long)bsd_rlp->rlim_max; 1105 if (rlim.rlim_max == ULONG_MAX) 1106 rlim.rlim_max = LONG_MAX; 1107 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1108 } 1109 1110 int 1111 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1112 { 1113 struct l_rlimit rlim; 1114 struct proc *p = td->td_proc; 1115 struct rlimit *bsd_rlp; 1116 u_int which; 1117 1118 #ifdef DEBUG 1119 if (ldebug(getrlimit)) 1120 printf(ARGS(getrlimit, "%d, %p"), 1121 args->resource, (void *)args->rlim); 1122 #endif 1123 1124 if (args->resource >= LINUX_RLIM_NLIMITS) 1125 return (EINVAL); 1126 1127 which = linux_to_bsd_resource[args->resource]; 1128 if (which == -1) 1129 return (EINVAL); 1130 bsd_rlp = &p->p_rlimit[which]; 1131 1132 rlim.rlim_cur = (l_ulong)bsd_rlp->rlim_cur; 1133 rlim.rlim_max = (l_ulong)bsd_rlp->rlim_max; 1134 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1135 } 1136 #endif /*!__alpha__*/ 1137 1138 int 1139 linux_sched_setscheduler(struct thread *td, 1140 struct linux_sched_setscheduler_args *args) 1141 { 1142 struct sched_setscheduler_args bsd; 1143 1144 #ifdef DEBUG 1145 if (ldebug(sched_setscheduler)) 1146 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1147 args->pid, args->policy, (const void *)args->param); 1148 #endif 1149 1150 switch (args->policy) { 1151 case LINUX_SCHED_OTHER: 1152 bsd.policy = SCHED_OTHER; 1153 break; 1154 case LINUX_SCHED_FIFO: 1155 bsd.policy = SCHED_FIFO; 1156 break; 1157 case LINUX_SCHED_RR: 1158 bsd.policy = SCHED_RR; 1159 break; 1160 default: 1161 return EINVAL; 1162 } 1163 1164 bsd.pid = args->pid; 1165 bsd.param = (struct sched_param *)args->param; 1166 return sched_setscheduler(td, &bsd); 1167 } 1168 1169 int 1170 linux_sched_getscheduler(struct thread *td, 1171 struct linux_sched_getscheduler_args *args) 1172 { 1173 struct sched_getscheduler_args bsd; 1174 int error; 1175 1176 #ifdef DEBUG 1177 if (ldebug(sched_getscheduler)) 1178 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1179 #endif 1180 1181 bsd.pid = args->pid; 1182 error = sched_getscheduler(td, &bsd); 1183 1184 switch (td->td_retval[0]) { 1185 case SCHED_OTHER: 1186 td->td_retval[0] = LINUX_SCHED_OTHER; 1187 break; 1188 case SCHED_FIFO: 1189 td->td_retval[0] = LINUX_SCHED_FIFO; 1190 break; 1191 case SCHED_RR: 1192 td->td_retval[0] = LINUX_SCHED_RR; 1193 break; 1194 } 1195 1196 return error; 1197 } 1198 1199 int 1200 linux_sched_get_priority_max(struct thread *td, 1201 struct linux_sched_get_priority_max_args *args) 1202 { 1203 struct sched_get_priority_max_args bsd; 1204 1205 #ifdef DEBUG 1206 if (ldebug(sched_get_priority_max)) 1207 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1208 #endif 1209 1210 switch (args->policy) { 1211 case LINUX_SCHED_OTHER: 1212 bsd.policy = SCHED_OTHER; 1213 break; 1214 case LINUX_SCHED_FIFO: 1215 bsd.policy = SCHED_FIFO; 1216 break; 1217 case LINUX_SCHED_RR: 1218 bsd.policy = SCHED_RR; 1219 break; 1220 default: 1221 return EINVAL; 1222 } 1223 return sched_get_priority_max(td, &bsd); 1224 } 1225 1226 int 1227 linux_sched_get_priority_min(struct thread *td, 1228 struct linux_sched_get_priority_min_args *args) 1229 { 1230 struct sched_get_priority_min_args bsd; 1231 1232 #ifdef DEBUG 1233 if (ldebug(sched_get_priority_min)) 1234 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1235 #endif 1236 1237 switch (args->policy) { 1238 case LINUX_SCHED_OTHER: 1239 bsd.policy = SCHED_OTHER; 1240 break; 1241 case LINUX_SCHED_FIFO: 1242 bsd.policy = SCHED_FIFO; 1243 break; 1244 case LINUX_SCHED_RR: 1245 bsd.policy = SCHED_RR; 1246 break; 1247 default: 1248 return EINVAL; 1249 } 1250 return sched_get_priority_min(td, &bsd); 1251 } 1252 1253 #define REBOOT_CAD_ON 0x89abcdef 1254 #define REBOOT_CAD_OFF 0 1255 #define REBOOT_HALT 0xcdef0123 1256 1257 int 1258 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1259 { 1260 struct reboot_args bsd_args; 1261 1262 #ifdef DEBUG 1263 if (ldebug(reboot)) 1264 printf(ARGS(reboot, "0x%x"), args->cmd); 1265 #endif 1266 if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF) 1267 return (0); 1268 bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0; 1269 return (reboot(td, &bsd_args)); 1270 } 1271 1272 #ifndef __alpha__ 1273 1274 /* 1275 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1276 * td->td_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This 1277 * globbers registers that are assumed to be preserved. The following 1278 * lightweight syscalls fixes this. See also linux_getgid16() and 1279 * linux_getuid16() in linux_uid16.c. 1280 * 1281 * linux_getpid() - MP SAFE 1282 * linux_getgid() - MP SAFE 1283 * linux_getuid() - MP SAFE 1284 */ 1285 1286 int 1287 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1288 { 1289 1290 td->td_retval[0] = td->td_proc->p_pid; 1291 return (0); 1292 } 1293 1294 int 1295 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1296 { 1297 1298 td->td_retval[0] = td->td_ucred->cr_rgid; 1299 return (0); 1300 } 1301 1302 int 1303 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1304 { 1305 1306 td->td_retval[0] = td->td_ucred->cr_ruid; 1307 return (0); 1308 } 1309 1310 #endif /*!__alpha__*/ 1311 1312 int 1313 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1314 { 1315 struct getsid_args bsd; 1316 bsd.pid = args->pid; 1317 return getsid(td, &bsd); 1318 } 1319