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/lock.h> 40 #include <sys/mac.h> 41 #include <sys/malloc.h> 42 #include <sys/mman.h> 43 #include <sys/mount.h> 44 #include <sys/mutex.h> 45 #include <sys/namei.h> 46 #include <sys/proc.h> 47 #include <sys/reboot.h> 48 #include <sys/resourcevar.h> 49 #include <sys/signalvar.h> 50 #include <sys/stat.h> 51 #include <sys/syscallsubr.h> 52 #include <sys/sysctl.h> 53 #include <sys/sysproto.h> 54 #include <sys/systm.h> 55 #include <sys/time.h> 56 #include <sys/vmmeter.h> 57 #include <sys/vnode.h> 58 #include <sys/wait.h> 59 60 #include <vm/vm.h> 61 #include <vm/pmap.h> 62 #include <vm/vm_kern.h> 63 #include <vm/vm_map.h> 64 #include <vm/vm_extern.h> 65 #include <vm/vm_object.h> 66 #include <vm/swap_pager.h> 67 68 #include <machine/limits.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; 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 if (swapblist == NULL) { 148 sysinfo.totalswap= 0; 149 sysinfo.freeswap = 0; 150 } else { 151 sysinfo.totalswap = swapblist->bl_blocks * 1024; 152 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE; 153 } 154 155 sysinfo.procs = 20; /* Hack */ 156 157 return copyout(&sysinfo, (caddr_t)args->info, sizeof(sysinfo)); 158 } 159 #endif /*!__alpha__*/ 160 161 #ifndef __alpha__ 162 int 163 linux_alarm(struct thread *td, struct linux_alarm_args *args) 164 { 165 struct itimerval it, old_it; 166 struct timeval tv; 167 int s; 168 169 #ifdef DEBUG 170 if (ldebug(alarm)) 171 printf(ARGS(alarm, "%u"), args->secs); 172 #endif 173 174 if (args->secs > 100000000) 175 return EINVAL; 176 177 it.it_value.tv_sec = (long)args->secs; 178 it.it_value.tv_usec = 0; 179 it.it_interval.tv_sec = 0; 180 it.it_interval.tv_usec = 0; 181 s = splsoftclock(); 182 old_it = td->td_proc->p_realtimer; 183 getmicrouptime(&tv); 184 if (timevalisset(&old_it.it_value)) 185 callout_stop(&td->td_proc->p_itcallout); 186 if (it.it_value.tv_sec != 0) { 187 callout_reset(&td->td_proc->p_itcallout, tvtohz(&it.it_value), 188 realitexpire, td->td_proc); 189 timevaladd(&it.it_value, &tv); 190 } 191 td->td_proc->p_realtimer = it; 192 splx(s); 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 /* 321 * Lock no longer needed 322 */ 323 VOP_UNLOCK(vp, 0, td); 324 locked = 0; 325 326 /* Pull in executable header into kernel_map */ 327 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 328 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 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((caddr_t)(uintptr_t)(buffer + file_offset), 419 (caddr_t)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((caddr_t)args->timeout, &utv, 495 sizeof(utv)))) 496 goto select_out; 497 #ifdef DEBUG 498 if (ldebug(select)) 499 printf(LMSG("incoming timeout (%ld/%ld)"), 500 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 (%ld/%ld)"), 557 utv.tv_sec, utv.tv_usec); 558 #endif 559 if ((error = copyout(&utv, (caddr_t)args->timeout, 560 sizeof(utv)))) 561 goto select_out; 562 } 563 564 select_out: 565 #ifdef DEBUG 566 if (ldebug(select)) 567 printf(LMSG("select_out -> %d"), error); 568 #endif 569 return error; 570 } 571 572 int 573 linux_mremap(struct thread *td, struct linux_mremap_args *args) 574 { 575 struct munmap_args /* { 576 void *addr; 577 size_t len; 578 } */ bsd_args; 579 int error = 0; 580 581 #ifdef DEBUG 582 if (ldebug(mremap)) 583 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 584 (void *)args->addr, 585 (unsigned long)args->old_len, 586 (unsigned long)args->new_len, 587 (unsigned long)args->flags); 588 #endif 589 args->new_len = round_page(args->new_len); 590 args->old_len = round_page(args->old_len); 591 592 if (args->new_len > args->old_len) { 593 td->td_retval[0] = 0; 594 return ENOMEM; 595 } 596 597 if (args->new_len < args->old_len) { 598 bsd_args.addr = (caddr_t)(args->addr + args->new_len); 599 bsd_args.len = args->old_len - args->new_len; 600 error = munmap(td, &bsd_args); 601 } 602 603 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 604 return error; 605 } 606 607 int 608 linux_msync(struct thread *td, struct linux_msync_args *args) 609 { 610 struct msync_args bsd_args; 611 612 bsd_args.addr = (caddr_t)args->addr; 613 bsd_args.len = args->len; 614 bsd_args.flags = 0; /* XXX ignore */ 615 616 return msync(td, &bsd_args); 617 } 618 619 #ifndef __alpha__ 620 int 621 linux_time(struct thread *td, struct linux_time_args *args) 622 { 623 struct timeval tv; 624 l_time_t tm; 625 int error; 626 627 #ifdef DEBUG 628 if (ldebug(time)) 629 printf(ARGS(time, "*")); 630 #endif 631 632 microtime(&tv); 633 tm = tv.tv_sec; 634 if (args->tm && (error = copyout(&tm, (caddr_t)args->tm, sizeof(tm)))) 635 return error; 636 td->td_retval[0] = tm; 637 return 0; 638 } 639 #endif /*!__alpha__*/ 640 641 struct l_times_argv { 642 l_long tms_utime; 643 l_long tms_stime; 644 l_long tms_cutime; 645 l_long tms_cstime; 646 }; 647 648 #ifdef __alpha__ 649 #define CLK_TCK 1024 /* Linux uses 1024 on alpha */ 650 #else 651 #define CLK_TCK 100 /* Linux uses 100 */ 652 #endif 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; 660 struct l_times_argv tms; 661 struct rusage ru; 662 int error; 663 664 #ifdef DEBUG 665 if (ldebug(times)) 666 printf(ARGS(times, "*")); 667 #endif 668 669 mtx_lock_spin(&sched_lock); 670 calcru(td->td_proc, &ru.ru_utime, &ru.ru_stime, NULL); 671 mtx_unlock_spin(&sched_lock); 672 673 tms.tms_utime = CONVTCK(ru.ru_utime); 674 tms.tms_stime = CONVTCK(ru.ru_stime); 675 676 tms.tms_cutime = CONVTCK(td->td_proc->p_stats->p_cru.ru_utime); 677 tms.tms_cstime = CONVTCK(td->td_proc->p_stats->p_cru.ru_stime); 678 679 if ((error = copyout(&tms, (caddr_t)args->buf, sizeof(tms)))) 680 return error; 681 682 microuptime(&tv); 683 td->td_retval[0] = (int)CONVTCK(tv); 684 return 0; 685 } 686 687 int 688 linux_newuname(struct thread *td, struct linux_newuname_args *args) 689 { 690 struct l_new_utsname utsname; 691 char osname[LINUX_MAX_UTSNAME]; 692 char osrelease[LINUX_MAX_UTSNAME]; 693 694 #ifdef DEBUG 695 if (ldebug(newuname)) 696 printf(ARGS(newuname, "*")); 697 #endif 698 699 linux_get_osname(td->td_proc, osname); 700 linux_get_osrelease(td->td_proc, osrelease); 701 702 bzero(&utsname, sizeof(utsname)); 703 strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1); 704 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME-1); 705 strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1); 706 strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1); 707 strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1); 708 strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1); 709 710 return (copyout(&utsname, (caddr_t)args->buf, sizeof(utsname))); 711 } 712 713 #if defined(__i386__) 714 struct l_utimbuf { 715 l_time_t l_actime; 716 l_time_t l_modtime; 717 }; 718 719 int 720 linux_utime(struct thread *td, struct linux_utime_args *args) 721 { 722 struct timeval tv[2], *tvp; 723 struct l_utimbuf lut; 724 char *fname; 725 int error; 726 727 LCONVPATHEXIST(td, args->fname, &fname); 728 729 #ifdef DEBUG 730 if (ldebug(utime)) 731 printf(ARGS(utime, "%s, *"), fname); 732 #endif 733 734 if (args->times) { 735 if ((error = copyin((caddr_t)args->times, &lut, sizeof lut))) { 736 LFREEPATH(fname); 737 return error; 738 } 739 tv[0].tv_sec = lut.l_actime; 740 tv[0].tv_usec = 0; 741 tv[1].tv_sec = lut.l_modtime; 742 tv[1].tv_usec = 0; 743 tvp = tv; 744 } else 745 tvp = NULL; 746 747 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 748 LFREEPATH(fname); 749 return (error); 750 } 751 #endif /* __i386__ */ 752 753 #define __WCLONE 0x80000000 754 755 #ifndef __alpha__ 756 int 757 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 758 { 759 struct wait_args /* { 760 int pid; 761 int *status; 762 int options; 763 struct rusage *rusage; 764 } */ tmp; 765 int error, tmpstat; 766 767 #ifdef DEBUG 768 if (ldebug(waitpid)) 769 printf(ARGS(waitpid, "%d, %p, %d"), 770 args->pid, (void *)args->status, args->options); 771 #endif 772 773 tmp.pid = args->pid; 774 tmp.status = args->status; 775 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 776 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 777 if (args->options & __WCLONE) 778 tmp.options |= WLINUXCLONE; 779 tmp.rusage = NULL; 780 781 if ((error = wait4(td, &tmp)) != 0) 782 return error; 783 784 if (args->status) { 785 if ((error = copyin((caddr_t)args->status, &tmpstat, 786 sizeof(int))) != 0) 787 return error; 788 tmpstat &= 0xffff; 789 if (WIFSIGNALED(tmpstat)) 790 tmpstat = (tmpstat & 0xffffff80) | 791 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 792 else if (WIFSTOPPED(tmpstat)) 793 tmpstat = (tmpstat & 0xffff00ff) | 794 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 795 return copyout(&tmpstat, (caddr_t)args->status, sizeof(int)); 796 } 797 798 return 0; 799 } 800 #endif /*!__alpha__*/ 801 802 int 803 linux_wait4(struct thread *td, struct linux_wait4_args *args) 804 { 805 struct wait_args /* { 806 int pid; 807 int *status; 808 int options; 809 struct rusage *rusage; 810 } */ tmp; 811 int error, tmpstat; 812 813 #ifdef DEBUG 814 if (ldebug(wait4)) 815 printf(ARGS(wait4, "%d, %p, %d, %p"), 816 args->pid, (void *)args->status, args->options, 817 (void *)args->rusage); 818 #endif 819 820 tmp.pid = args->pid; 821 tmp.status = args->status; 822 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 823 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 824 if (args->options & __WCLONE) 825 tmp.options |= WLINUXCLONE; 826 tmp.rusage = (struct rusage *)args->rusage; 827 828 if ((error = wait4(td, &tmp)) != 0) 829 return error; 830 831 SIGDELSET(td->td_proc->p_siglist, SIGCHLD); 832 833 if (args->status) { 834 if ((error = copyin((caddr_t)args->status, &tmpstat, 835 sizeof(int))) != 0) 836 return error; 837 tmpstat &= 0xffff; 838 if (WIFSIGNALED(tmpstat)) 839 tmpstat = (tmpstat & 0xffffff80) | 840 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 841 else if (WIFSTOPPED(tmpstat)) 842 tmpstat = (tmpstat & 0xffff00ff) | 843 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 844 return copyout(&tmpstat, (caddr_t)args->status, sizeof(int)); 845 } 846 847 return 0; 848 } 849 850 int 851 linux_mknod(struct thread *td, struct linux_mknod_args *args) 852 { 853 char *path; 854 int error; 855 856 LCONVPATHCREAT(td, args->path, &path); 857 858 #ifdef DEBUG 859 if (ldebug(mknod)) 860 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 861 #endif 862 863 if (args->mode & S_IFIFO) 864 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 865 else 866 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 867 args->dev); 868 LFREEPATH(path); 869 return (error); 870 } 871 872 /* 873 * UGH! This is just about the dumbest idea I've ever heard!! 874 */ 875 int 876 linux_personality(struct thread *td, struct linux_personality_args *args) 877 { 878 #ifdef DEBUG 879 if (ldebug(personality)) 880 printf(ARGS(personality, "%d"), args->per); 881 #endif 882 #ifndef __alpha__ 883 if (args->per != 0) 884 return EINVAL; 885 #endif 886 887 /* Yes Jim, it's still a Linux... */ 888 td->td_retval[0] = 0; 889 return 0; 890 } 891 892 /* 893 * Wrappers for get/setitimer for debugging.. 894 */ 895 int 896 linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 897 { 898 struct setitimer_args bsa; 899 struct itimerval foo; 900 int error; 901 902 #ifdef DEBUG 903 if (ldebug(setitimer)) 904 printf(ARGS(setitimer, "%p, %p"), 905 (void *)args->itv, (void *)args->oitv); 906 #endif 907 bsa.which = args->which; 908 bsa.itv = (struct itimerval *)args->itv; 909 bsa.oitv = (struct itimerval *)args->oitv; 910 if (args->itv) { 911 if ((error = copyin((caddr_t)args->itv, &foo, sizeof(foo)))) 912 return error; 913 #ifdef DEBUG 914 if (ldebug(setitimer)) { 915 printf("setitimer: value: sec: %ld, usec: %ld\n", 916 foo.it_value.tv_sec, foo.it_value.tv_usec); 917 printf("setitimer: interval: sec: %ld, usec: %ld\n", 918 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 919 } 920 #endif 921 } 922 return setitimer(td, &bsa); 923 } 924 925 int 926 linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 927 { 928 struct getitimer_args bsa; 929 #ifdef DEBUG 930 if (ldebug(getitimer)) 931 printf(ARGS(getitimer, "%p"), (void *)args->itv); 932 #endif 933 bsa.which = args->which; 934 bsa.itv = (struct itimerval *)args->itv; 935 return getitimer(td, &bsa); 936 } 937 938 #ifndef __alpha__ 939 int 940 linux_nice(struct thread *td, struct linux_nice_args *args) 941 { 942 struct setpriority_args bsd_args; 943 944 bsd_args.which = PRIO_PROCESS; 945 bsd_args.who = 0; /* current process */ 946 bsd_args.prio = args->inc; 947 return setpriority(td, &bsd_args); 948 } 949 #endif /*!__alpha__*/ 950 951 int 952 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 953 { 954 struct ucred *newcred, *oldcred; 955 l_gid_t linux_gidset[NGROUPS]; 956 gid_t *bsd_gidset; 957 int ngrp, error; 958 struct proc *p; 959 960 ngrp = args->gidsetsize; 961 if (ngrp >= NGROUPS) 962 return (EINVAL); 963 error = copyin((caddr_t)args->grouplist, linux_gidset, 964 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, (caddr_t)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((caddr_t)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, (caddr_t)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, (caddr_t)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