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 withough 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_compat.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.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/mman.h> 41 #include <sys/mount.h> 42 #include <sys/mutex.h> 43 #include <sys/namei.h> 44 #include <sys/poll.h> 45 #include <sys/proc.h> 46 #include <sys/blist.h> 47 #include <sys/reboot.h> 48 #include <sys/resourcevar.h> 49 #include <sys/signalvar.h> 50 #include <sys/stat.h> 51 #include <sys/sysctl.h> 52 #include <sys/sysproto.h> 53 #include <sys/time.h> 54 #include <sys/unistd.h> 55 #include <sys/vmmeter.h> 56 #include <sys/vnode.h> 57 #include <sys/wait.h> 58 59 #include <vm/vm.h> 60 #include <vm/pmap.h> 61 #include <vm/vm_kern.h> 62 #include <vm/vm_map.h> 63 #include <vm/vm_extern.h> 64 #include <vm/vm_object.h> 65 #include <vm/swap_pager.h> 66 67 #include <machine/limits.h> 68 69 #include <posix4/sched.h> 70 71 #include <machine/../linux/linux.h> 72 #include <machine/../linux/linux_proto.h> 73 #include <compat/linux/linux_mib.h> 74 #include <compat/linux/linux_util.h> 75 76 #ifdef __alpha__ 77 #define BSD_TO_LINUX_SIGNAL(sig) (sig) 78 #else 79 #define BSD_TO_LINUX_SIGNAL(sig) \ 80 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 81 #endif 82 83 #ifndef __alpha__ 84 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 85 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 86 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 87 RLIMIT_MEMLOCK, -1 88 }; 89 #endif /*!__alpha__*/ 90 91 struct l_sysinfo { 92 l_long uptime; /* Seconds since boot */ 93 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 94 l_ulong totalram; /* Total usable main memory size */ 95 l_ulong freeram; /* Available memory size */ 96 l_ulong sharedram; /* Amount of shared memory */ 97 l_ulong bufferram; /* Memory used by buffers */ 98 l_ulong totalswap; /* Total swap space size */ 99 l_ulong freeswap; /* swap space still available */ 100 l_ushort procs; /* Number of current processes */ 101 char _f[22]; /* Pads structure to 64 bytes */ 102 }; 103 #ifndef __alpha__ 104 int 105 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 106 { 107 struct l_sysinfo sysinfo; 108 vm_object_t object; 109 int i; 110 struct timespec ts; 111 112 /* Uptime is copied out of print_uptime() in kern_shutdown.c */ 113 getnanouptime(&ts); 114 i = 0; 115 if (ts.tv_sec >= 86400) { 116 ts.tv_sec %= 86400; 117 i = 1; 118 } 119 if (i || ts.tv_sec >= 3600) { 120 ts.tv_sec %= 3600; 121 i = 1; 122 } 123 if (i || ts.tv_sec >= 60) { 124 ts.tv_sec %= 60; 125 i = 1; 126 } 127 sysinfo.uptime=ts.tv_sec; 128 129 /* Use the information from the mib to get our load averages */ 130 for (i = 0; i < 3; i++) 131 sysinfo.loads[i] = averunnable.ldavg[i]; 132 133 sysinfo.totalram = physmem * PAGE_SIZE; 134 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 135 136 sysinfo.sharedram = 0; 137 for (object = TAILQ_FIRST(&vm_object_list); object != NULL; 138 object = TAILQ_NEXT(object, object_list)) 139 if (object->shadow_count > 1) 140 sysinfo.sharedram += object->resident_page_count; 141 142 sysinfo.sharedram *= PAGE_SIZE; 143 sysinfo.bufferram = 0; 144 145 if (swapblist == NULL) { 146 sysinfo.totalswap= 0; 147 sysinfo.freeswap = 0; 148 } else { 149 sysinfo.totalswap = swapblist->bl_blocks * 1024; 150 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE; 151 } 152 153 sysinfo.procs = 20; /* Hack */ 154 155 return copyout(&sysinfo, (caddr_t)args->info, sizeof(sysinfo)); 156 } 157 #endif /*!__alpha__*/ 158 159 #ifndef __alpha__ 160 int 161 linux_alarm(struct thread *td, struct linux_alarm_args *args) 162 { 163 struct itimerval it, old_it; 164 struct timeval tv; 165 int s; 166 167 #ifdef DEBUG 168 if (ldebug(alarm)) 169 printf(ARGS(alarm, "%u"), args->secs); 170 #endif 171 172 if (args->secs > 100000000) 173 return EINVAL; 174 175 it.it_value.tv_sec = (long)args->secs; 176 it.it_value.tv_usec = 0; 177 it.it_interval.tv_sec = 0; 178 it.it_interval.tv_usec = 0; 179 s = splsoftclock(); 180 old_it = td->td_proc->p_realtimer; 181 getmicrouptime(&tv); 182 if (timevalisset(&old_it.it_value)) 183 callout_stop(&td->td_proc->p_itcallout); 184 if (it.it_value.tv_sec != 0) { 185 callout_reset(&td->td_proc->p_itcallout, tvtohz(&it.it_value), 186 realitexpire, td->td_proc); 187 timevaladd(&it.it_value, &tv); 188 } 189 td->td_proc->p_realtimer = it; 190 splx(s); 191 if (timevalcmp(&old_it.it_value, &tv, >)) { 192 timevalsub(&old_it.it_value, &tv); 193 if (old_it.it_value.tv_usec != 0) 194 old_it.it_value.tv_sec++; 195 td->td_retval[0] = old_it.it_value.tv_sec; 196 } 197 return 0; 198 } 199 #endif /*!__alpha__*/ 200 201 int 202 linux_brk(struct thread *td, struct linux_brk_args *args) 203 { 204 struct vmspace *vm = td->td_proc->p_vmspace; 205 vm_offset_t new, old; 206 struct obreak_args /* { 207 char * nsize; 208 } */ tmp; 209 210 #ifdef DEBUG 211 if (ldebug(brk)) 212 printf(ARGS(brk, "%p"), (void *)args->dsend); 213 #endif 214 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 215 new = (vm_offset_t)args->dsend; 216 tmp.nsize = (char *) new; 217 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 218 td->td_retval[0] = (long)new; 219 else 220 td->td_retval[0] = (long)old; 221 222 return 0; 223 } 224 225 int 226 linux_uselib(struct thread *td, struct linux_uselib_args *args) 227 { 228 struct nameidata ni; 229 struct vnode *vp; 230 struct exec *a_out; 231 struct vattr attr; 232 vm_offset_t vmaddr; 233 unsigned long file_offset; 234 vm_offset_t buffer; 235 unsigned long bss_size; 236 int error; 237 caddr_t sg; 238 int locked; 239 240 sg = stackgap_init(); 241 CHECKALTEXIST(td, &sg, args->library); 242 243 #ifdef DEBUG 244 if (ldebug(uselib)) 245 printf(ARGS(uselib, "%s"), args->library); 246 #endif 247 248 a_out = NULL; 249 locked = 0; 250 vp = NULL; 251 252 /* 253 * XXX This code should make use of vn_open(), rather than doing 254 * all this stuff itself. 255 */ 256 NDINIT(&ni, LOOKUP, FOLLOW|LOCKLEAF, UIO_USERSPACE, args->library, td); 257 error = namei(&ni); 258 if (error) 259 goto cleanup; 260 261 vp = ni.ni_vp; 262 /* 263 * XXX - This looks like a bogus check. A LOCKLEAF namei should not 264 * succeed without returning a vnode. 265 */ 266 if (vp == NULL) { 267 error = ENOEXEC; /* ?? */ 268 goto cleanup; 269 } 270 NDFREE(&ni, NDF_ONLY_PNBUF); 271 272 /* 273 * From here on down, we have a locked vnode that must be unlocked. 274 */ 275 locked++; 276 277 /* Writable? */ 278 if (vp->v_writecount) { 279 error = ETXTBSY; 280 goto cleanup; 281 } 282 283 /* Executable? */ 284 error = VOP_GETATTR(vp, &attr, td->td_ucred, td); 285 if (error) 286 goto cleanup; 287 288 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 289 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 290 error = ENOEXEC; 291 goto cleanup; 292 } 293 294 /* Sensible size? */ 295 if (attr.va_size == 0) { 296 error = ENOEXEC; 297 goto cleanup; 298 } 299 300 /* Can we access it? */ 301 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 302 if (error) 303 goto cleanup; 304 305 error = VOP_OPEN(vp, FREAD, td->td_ucred, td); 306 if (error) 307 goto cleanup; 308 309 /* 310 * Lock no longer needed 311 */ 312 VOP_UNLOCK(vp, 0, td); 313 locked = 0; 314 315 /* Pull in executable header into kernel_map */ 316 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 317 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 318 if (error) 319 goto cleanup; 320 321 /* Is it a Linux binary ? */ 322 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 323 error = ENOEXEC; 324 goto cleanup; 325 } 326 327 /* 328 * While we are here, we should REALLY do some more checks 329 */ 330 331 /* Set file/virtual offset based on a.out variant. */ 332 switch ((int)(a_out->a_magic & 0xffff)) { 333 case 0413: /* ZMAGIC */ 334 file_offset = 1024; 335 break; 336 case 0314: /* QMAGIC */ 337 file_offset = 0; 338 break; 339 default: 340 error = ENOEXEC; 341 goto cleanup; 342 } 343 344 bss_size = round_page(a_out->a_bss); 345 346 /* Check various fields in header for validity/bounds. */ 347 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 348 error = ENOEXEC; 349 goto cleanup; 350 } 351 352 /* text + data can't exceed file size */ 353 if (a_out->a_data + a_out->a_text > attr.va_size) { 354 error = EFAULT; 355 goto cleanup; 356 } 357 358 /* To protect td->td_proc->p_rlimit in the if condition. */ 359 mtx_assert(&Giant, MA_OWNED); 360 361 /* 362 * text/data/bss must not exceed limits 363 * XXX - this is not complete. it should check current usage PLUS 364 * the resources needed by this library. 365 */ 366 if (a_out->a_text > maxtsiz || 367 a_out->a_data + bss_size > 368 td->td_proc->p_rlimit[RLIMIT_DATA].rlim_cur) { 369 error = ENOMEM; 370 goto cleanup; 371 } 372 373 /* prevent more writers */ 374 vp->v_flag |= VTEXT; 375 376 /* 377 * Check if file_offset page aligned. Currently we cannot handle 378 * misalinged file offsets, and so we read in the entire image 379 * (what a waste). 380 */ 381 if (file_offset & PAGE_MASK) { 382 #ifdef DEBUG 383 printf("uselib: Non page aligned binary %lu\n", file_offset); 384 #endif 385 /* Map text+data read/write/execute */ 386 387 /* a_entry is the load address and is page aligned */ 388 vmaddr = trunc_page(a_out->a_entry); 389 390 /* get anon user mapping, read+write+execute */ 391 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 392 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 393 VM_PROT_ALL, 0); 394 if (error) 395 goto cleanup; 396 397 /* map file into kernel_map */ 398 error = vm_mmap(kernel_map, &buffer, 399 round_page(a_out->a_text + a_out->a_data + file_offset), 400 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 401 trunc_page(file_offset)); 402 if (error) 403 goto cleanup; 404 405 /* copy from kernel VM space to user space */ 406 error = copyout((caddr_t)(uintptr_t)(buffer + file_offset), 407 (caddr_t)vmaddr, a_out->a_text + a_out->a_data); 408 409 /* release temporary kernel space */ 410 vm_map_remove(kernel_map, buffer, buffer + 411 round_page(a_out->a_text + a_out->a_data + file_offset)); 412 413 if (error) 414 goto cleanup; 415 } else { 416 #ifdef DEBUG 417 printf("uselib: Page aligned binary %lu\n", file_offset); 418 #endif 419 /* 420 * for QMAGIC, a_entry is 20 bytes beyond the load address 421 * to skip the executable header 422 */ 423 vmaddr = trunc_page(a_out->a_entry); 424 425 /* 426 * Map it all into the process's space as a single 427 * copy-on-write "data" segment. 428 */ 429 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 430 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 431 MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset); 432 if (error) 433 goto cleanup; 434 } 435 #ifdef DEBUG 436 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0], 437 ((long*)vmaddr)[1]); 438 #endif 439 if (bss_size != 0) { 440 /* Calculate BSS start address */ 441 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 442 a_out->a_data; 443 444 /* allocate some 'anon' space */ 445 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 446 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 447 if (error) 448 goto cleanup; 449 } 450 451 cleanup: 452 /* Unlock vnode if needed */ 453 if (locked) 454 VOP_UNLOCK(vp, 0, td); 455 456 /* Release the kernel mapping. */ 457 if (a_out) 458 vm_map_remove(kernel_map, (vm_offset_t)a_out, 459 (vm_offset_t)a_out + PAGE_SIZE); 460 461 return error; 462 } 463 464 int 465 linux_select(struct thread *td, struct linux_select_args *args) 466 { 467 struct select_args bsa; 468 struct timeval tv0, tv1, utv, *tvp; 469 caddr_t sg; 470 int error; 471 472 #ifdef DEBUG 473 if (ldebug(select)) 474 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 475 (void *)args->readfds, (void *)args->writefds, 476 (void *)args->exceptfds, (void *)args->timeout); 477 #endif 478 479 error = 0; 480 bsa.nd = args->nfds; 481 bsa.in = args->readfds; 482 bsa.ou = args->writefds; 483 bsa.ex = args->exceptfds; 484 bsa.tv = (struct timeval *)args->timeout; 485 486 /* 487 * Store current time for computation of the amount of 488 * time left. 489 */ 490 if (args->timeout) { 491 if ((error = copyin((caddr_t)args->timeout, &utv, 492 sizeof(utv)))) 493 goto select_out; 494 #ifdef DEBUG 495 if (ldebug(select)) 496 printf(LMSG("incoming timeout (%ld/%ld)"), 497 utv.tv_sec, utv.tv_usec); 498 #endif 499 500 if (itimerfix(&utv)) { 501 /* 502 * The timeval was invalid. Convert it to something 503 * valid that will act as it does under Linux. 504 */ 505 sg = stackgap_init(); 506 tvp = stackgap_alloc(&sg, sizeof(utv)); 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 if ((error = copyout(&utv, tvp, sizeof(utv)))) 516 goto select_out; 517 bsa.tv = tvp; 518 } 519 microtime(&tv0); 520 } 521 522 error = select(td, &bsa); 523 #ifdef DEBUG 524 if (ldebug(select)) 525 printf(LMSG("real select returns %d"), error); 526 #endif 527 if (error) { 528 /* 529 * See fs/select.c in the Linux kernel. Without this, 530 * Maelstrom doesn't work. 531 */ 532 if (error == ERESTART) 533 error = EINTR; 534 goto select_out; 535 } 536 537 if (args->timeout) { 538 if (td->td_retval[0]) { 539 /* 540 * Compute how much time was left of the timeout, 541 * by subtracting the current time and the time 542 * before we started the call, and subtracting 543 * that result from the user-supplied value. 544 */ 545 microtime(&tv1); 546 timevalsub(&tv1, &tv0); 547 timevalsub(&utv, &tv1); 548 if (utv.tv_sec < 0) 549 timevalclear(&utv); 550 } else 551 timevalclear(&utv); 552 #ifdef DEBUG 553 if (ldebug(select)) 554 printf(LMSG("outgoing timeout (%ld/%ld)"), 555 utv.tv_sec, utv.tv_usec); 556 #endif 557 if ((error = copyout(&utv, (caddr_t)args->timeout, 558 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 : (u_long)args->addr; 602 return error; 603 } 604 605 int 606 linux_msync(struct thread *td, struct linux_msync_args *args) 607 { 608 struct msync_args bsd_args; 609 610 bsd_args.addr = (caddr_t)args->addr; 611 bsd_args.len = args->len; 612 bsd_args.flags = 0; /* XXX ignore */ 613 614 return msync(td, &bsd_args); 615 } 616 617 #ifndef __alpha__ 618 int 619 linux_time(struct thread *td, struct linux_time_args *args) 620 { 621 struct timeval tv; 622 l_time_t tm; 623 int error; 624 625 #ifdef DEBUG 626 if (ldebug(time)) 627 printf(ARGS(time, "*")); 628 #endif 629 630 microtime(&tv); 631 tm = tv.tv_sec; 632 if (args->tm && (error = copyout(&tm, (caddr_t)args->tm, sizeof(tm)))) 633 return error; 634 td->td_retval[0] = tm; 635 return 0; 636 } 637 #endif /*!__alpha__*/ 638 639 struct l_times_argv { 640 l_long tms_utime; 641 l_long tms_stime; 642 l_long tms_cutime; 643 l_long tms_cstime; 644 }; 645 646 #ifdef __alpha__ 647 #define CLK_TCK 1024 /* Linux uses 1024 on alpha */ 648 #else 649 #define CLK_TCK 100 /* Linux uses 100 */ 650 #endif 651 652 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 653 654 int 655 linux_times(struct thread *td, struct linux_times_args *args) 656 { 657 struct timeval tv; 658 struct l_times_argv tms; 659 struct rusage ru; 660 int error; 661 662 #ifdef DEBUG 663 if (ldebug(times)) 664 printf(ARGS(times, "*")); 665 #endif 666 667 mtx_lock_spin(&sched_lock); 668 calcru(td->td_proc, &ru.ru_utime, &ru.ru_stime, NULL); 669 mtx_unlock_spin(&sched_lock); 670 671 tms.tms_utime = CONVTCK(ru.ru_utime); 672 tms.tms_stime = CONVTCK(ru.ru_stime); 673 674 tms.tms_cutime = CONVTCK(td->td_proc->p_stats->p_cru.ru_utime); 675 tms.tms_cstime = CONVTCK(td->td_proc->p_stats->p_cru.ru_stime); 676 677 if ((error = copyout(&tms, (caddr_t)args->buf, sizeof(tms)))) 678 return error; 679 680 microuptime(&tv); 681 td->td_retval[0] = (int)CONVTCK(tv); 682 return 0; 683 } 684 685 int 686 linux_newuname(struct thread *td, struct linux_newuname_args *args) 687 { 688 struct l_new_utsname utsname; 689 char osname[LINUX_MAX_UTSNAME]; 690 char osrelease[LINUX_MAX_UTSNAME]; 691 692 #ifdef DEBUG 693 if (ldebug(newuname)) 694 printf(ARGS(newuname, "*")); 695 #endif 696 697 linux_get_osname(td->td_proc, osname); 698 linux_get_osrelease(td->td_proc, osrelease); 699 700 bzero(&utsname, sizeof(utsname)); 701 strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1); 702 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME-1); 703 strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1); 704 strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1); 705 strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1); 706 strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1); 707 708 return (copyout(&utsname, (caddr_t)args->buf, sizeof(utsname))); 709 } 710 711 #if defined(__i386__) 712 struct l_utimbuf { 713 l_time_t l_actime; 714 l_time_t l_modtime; 715 }; 716 717 int 718 linux_utime(struct thread *td, struct linux_utime_args *args) 719 { 720 struct utimes_args /* { 721 char *path; 722 struct timeval *tptr; 723 } */ bsdutimes; 724 struct timeval tv[2], *tvp; 725 struct l_utimbuf lut; 726 int error; 727 caddr_t sg; 728 729 sg = stackgap_init(); 730 CHECKALTEXIST(td, &sg, args->fname); 731 732 #ifdef DEBUG 733 if (ldebug(utime)) 734 printf(ARGS(utime, "%s, *"), args->fname); 735 #endif 736 737 if (args->times) { 738 if ((error = copyin((caddr_t)args->times, &lut, sizeof lut))) 739 return error; 740 tv[0].tv_sec = lut.l_actime; 741 tv[0].tv_usec = 0; 742 tv[1].tv_sec = lut.l_modtime; 743 tv[1].tv_usec = 0; 744 /* so that utimes can copyin */ 745 tvp = (struct timeval *)stackgap_alloc(&sg, sizeof(tv)); 746 if (tvp == NULL) 747 return (ENAMETOOLONG); 748 if ((error = copyout(tv, tvp, sizeof(tv)))) 749 return error; 750 bsdutimes.tptr = tvp; 751 } else 752 bsdutimes.tptr = NULL; 753 754 bsdutimes.path = args->fname; 755 return utimes(td, &bsdutimes); 756 } 757 #endif /* __i386__ */ 758 759 #define __WCLONE 0x80000000 760 761 #ifndef __alpha__ 762 int 763 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 764 { 765 struct wait_args /* { 766 int pid; 767 int *status; 768 int options; 769 struct rusage *rusage; 770 } */ tmp; 771 int error, tmpstat; 772 773 #ifdef DEBUG 774 if (ldebug(waitpid)) 775 printf(ARGS(waitpid, "%d, %p, %d"), 776 args->pid, (void *)args->status, args->options); 777 #endif 778 779 tmp.pid = args->pid; 780 tmp.status = args->status; 781 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 782 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 783 if (args->options & __WCLONE) 784 tmp.options |= WLINUXCLONE; 785 tmp.rusage = NULL; 786 787 if ((error = wait4(td, &tmp)) != 0) 788 return error; 789 790 if (args->status) { 791 if ((error = copyin((caddr_t)args->status, &tmpstat, 792 sizeof(int))) != 0) 793 return error; 794 tmpstat &= 0xffff; 795 if (WIFSIGNALED(tmpstat)) 796 tmpstat = (tmpstat & 0xffffff80) | 797 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 798 else if (WIFSTOPPED(tmpstat)) 799 tmpstat = (tmpstat & 0xffff00ff) | 800 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 801 return copyout(&tmpstat, (caddr_t)args->status, sizeof(int)); 802 } 803 804 return 0; 805 } 806 #endif /*!__alpha__*/ 807 808 int 809 linux_wait4(struct thread *td, struct linux_wait4_args *args) 810 { 811 struct wait_args /* { 812 int pid; 813 int *status; 814 int options; 815 struct rusage *rusage; 816 } */ tmp; 817 int error, tmpstat; 818 819 #ifdef DEBUG 820 if (ldebug(wait4)) 821 printf(ARGS(wait4, "%d, %p, %d, %p"), 822 args->pid, (void *)args->status, args->options, 823 (void *)args->rusage); 824 #endif 825 826 tmp.pid = args->pid; 827 tmp.status = args->status; 828 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 829 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 830 if (args->options & __WCLONE) 831 tmp.options |= WLINUXCLONE; 832 tmp.rusage = (struct rusage *)args->rusage; 833 834 if ((error = wait4(td, &tmp)) != 0) 835 return error; 836 837 SIGDELSET(td->td_proc->p_siglist, SIGCHLD); 838 839 if (args->status) { 840 if ((error = copyin((caddr_t)args->status, &tmpstat, 841 sizeof(int))) != 0) 842 return error; 843 tmpstat &= 0xffff; 844 if (WIFSIGNALED(tmpstat)) 845 tmpstat = (tmpstat & 0xffffff80) | 846 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 847 else if (WIFSTOPPED(tmpstat)) 848 tmpstat = (tmpstat & 0xffff00ff) | 849 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 850 return copyout(&tmpstat, (caddr_t)args->status, sizeof(int)); 851 } 852 853 return 0; 854 } 855 856 int 857 linux_mknod(struct thread *td, struct linux_mknod_args *args) 858 { 859 caddr_t sg; 860 struct mknod_args bsd_mknod; 861 struct mkfifo_args bsd_mkfifo; 862 863 sg = stackgap_init(); 864 865 CHECKALTCREAT(td, &sg, args->path); 866 867 #ifdef DEBUG 868 if (ldebug(mknod)) 869 printf(ARGS(mknod, "%s, %d, %d"), 870 args->path, args->mode, args->dev); 871 #endif 872 873 if (args->mode & S_IFIFO) { 874 bsd_mkfifo.path = args->path; 875 bsd_mkfifo.mode = args->mode; 876 return mkfifo(td, &bsd_mkfifo); 877 } else { 878 bsd_mknod.path = args->path; 879 bsd_mknod.mode = args->mode; 880 bsd_mknod.dev = args->dev; 881 return mknod(td, &bsd_mknod); 882 } 883 } 884 885 /* 886 * UGH! This is just about the dumbest idea I've ever heard!! 887 */ 888 int 889 linux_personality(struct thread *td, struct linux_personality_args *args) 890 { 891 #ifdef DEBUG 892 if (ldebug(personality)) 893 printf(ARGS(personality, "%d"), args->per); 894 #endif 895 #ifndef __alpha__ 896 if (args->per != 0) 897 return EINVAL; 898 #endif 899 900 /* Yes Jim, it's still a Linux... */ 901 td->td_retval[0] = 0; 902 return 0; 903 } 904 905 /* 906 * Wrappers for get/setitimer for debugging.. 907 */ 908 int 909 linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 910 { 911 struct setitimer_args bsa; 912 struct itimerval foo; 913 int error; 914 915 #ifdef DEBUG 916 if (ldebug(setitimer)) 917 printf(ARGS(setitimer, "%p, %p"), 918 (void *)args->itv, (void *)args->oitv); 919 #endif 920 bsa.which = args->which; 921 bsa.itv = (struct itimerval *)args->itv; 922 bsa.oitv = (struct itimerval *)args->oitv; 923 if (args->itv) { 924 if ((error = copyin((caddr_t)args->itv, &foo, sizeof(foo)))) 925 return error; 926 #ifdef DEBUG 927 if (ldebug(setitimer)) { 928 printf("setitimer: value: sec: %ld, usec: %ld\n", 929 foo.it_value.tv_sec, foo.it_value.tv_usec); 930 printf("setitimer: interval: sec: %ld, usec: %ld\n", 931 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 932 } 933 #endif 934 } 935 return setitimer(td, &bsa); 936 } 937 938 int 939 linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 940 { 941 struct getitimer_args bsa; 942 #ifdef DEBUG 943 if (ldebug(getitimer)) 944 printf(ARGS(getitimer, "%p"), (void *)args->itv); 945 #endif 946 bsa.which = args->which; 947 bsa.itv = (struct itimerval *)args->itv; 948 return getitimer(td, &bsa); 949 } 950 951 #ifndef __alpha__ 952 int 953 linux_nice(struct thread *td, struct linux_nice_args *args) 954 { 955 struct setpriority_args bsd_args; 956 957 bsd_args.which = PRIO_PROCESS; 958 bsd_args.who = 0; /* current process */ 959 bsd_args.prio = args->inc; 960 return setpriority(td, &bsd_args); 961 } 962 #endif /*!__alpha__*/ 963 964 int 965 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 966 { 967 struct ucred *newcred, *oldcred; 968 l_gid_t linux_gidset[NGROUPS]; 969 gid_t *bsd_gidset; 970 int ngrp, error; 971 struct proc *p; 972 973 ngrp = args->gidsetsize; 974 if (ngrp >= NGROUPS) 975 return (EINVAL); 976 error = copyin((caddr_t)args->grouplist, linux_gidset, 977 ngrp * sizeof(l_gid_t)); 978 if (error) 979 return (error); 980 newcred = crget(); 981 p = td->td_proc; 982 PROC_LOCK(p); 983 oldcred = p->p_ucred; 984 985 /* 986 * cr_groups[0] holds egid. Setting the whole set from 987 * the supplied set will cause egid to be changed too. 988 * Keep cr_groups[0] unchanged to prevent that. 989 */ 990 991 if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0) { 992 PROC_UNLOCK(p); 993 crfree(newcred); 994 return (error); 995 } 996 997 crcopy(newcred, oldcred); 998 if (ngrp > 0) { 999 newcred->cr_ngroups = ngrp + 1; 1000 1001 bsd_gidset = newcred->cr_groups; 1002 ngrp--; 1003 while (ngrp >= 0) { 1004 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1005 ngrp--; 1006 } 1007 } 1008 else 1009 newcred->cr_ngroups = 1; 1010 1011 setsugid(p); 1012 p->p_ucred = newcred; 1013 PROC_UNLOCK(p); 1014 crfree(oldcred); 1015 return (0); 1016 } 1017 1018 int 1019 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1020 { 1021 struct ucred *cred; 1022 l_gid_t linux_gidset[NGROUPS]; 1023 gid_t *bsd_gidset; 1024 int bsd_gidsetsz, ngrp, error; 1025 1026 cred = td->td_ucred; 1027 bsd_gidset = cred->cr_groups; 1028 bsd_gidsetsz = cred->cr_ngroups - 1; 1029 1030 /* 1031 * cr_groups[0] holds egid. Returning the whole set 1032 * here will cause a duplicate. Exclude cr_groups[0] 1033 * to prevent that. 1034 */ 1035 1036 if ((ngrp = args->gidsetsize) == 0) { 1037 td->td_retval[0] = bsd_gidsetsz; 1038 return (0); 1039 } 1040 1041 if (ngrp < bsd_gidsetsz) 1042 return (EINVAL); 1043 1044 ngrp = 0; 1045 while (ngrp < bsd_gidsetsz) { 1046 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1047 ngrp++; 1048 } 1049 1050 if ((error = copyout(linux_gidset, (caddr_t)args->grouplist, 1051 ngrp * sizeof(l_gid_t)))) 1052 return (error); 1053 1054 td->td_retval[0] = ngrp; 1055 return (0); 1056 } 1057 1058 #ifndef __alpha__ 1059 int 1060 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1061 { 1062 struct __setrlimit_args bsd; 1063 struct l_rlimit rlim; 1064 int error; 1065 caddr_t sg = stackgap_init(); 1066 1067 #ifdef DEBUG 1068 if (ldebug(setrlimit)) 1069 printf(ARGS(setrlimit, "%d, %p"), 1070 args->resource, (void *)args->rlim); 1071 #endif 1072 1073 if (args->resource >= LINUX_RLIM_NLIMITS) 1074 return (EINVAL); 1075 1076 bsd.which = linux_to_bsd_resource[args->resource]; 1077 if (bsd.which == -1) 1078 return (EINVAL); 1079 1080 error = copyin((caddr_t)args->rlim, &rlim, sizeof(rlim)); 1081 if (error) 1082 return (error); 1083 1084 bsd.rlp = stackgap_alloc(&sg, sizeof(struct rlimit)); 1085 bsd.rlp->rlim_cur = (rlim_t)rlim.rlim_cur; 1086 bsd.rlp->rlim_max = (rlim_t)rlim.rlim_max; 1087 return (setrlimit(td, &bsd)); 1088 } 1089 1090 int 1091 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1092 { 1093 struct __getrlimit_args bsd; 1094 struct l_rlimit rlim; 1095 int error; 1096 caddr_t sg = stackgap_init(); 1097 1098 #ifdef DEBUG 1099 if (ldebug(old_getrlimit)) 1100 printf(ARGS(old_getrlimit, "%d, %p"), 1101 args->resource, (void *)args->rlim); 1102 #endif 1103 1104 if (args->resource >= LINUX_RLIM_NLIMITS) 1105 return (EINVAL); 1106 1107 bsd.which = linux_to_bsd_resource[args->resource]; 1108 if (bsd.which == -1) 1109 return (EINVAL); 1110 1111 bsd.rlp = stackgap_alloc(&sg, sizeof(struct rlimit)); 1112 error = getrlimit(td, &bsd); 1113 if (error) 1114 return (error); 1115 1116 rlim.rlim_cur = (unsigned long)bsd.rlp->rlim_cur; 1117 if (rlim.rlim_cur == ULONG_MAX) 1118 rlim.rlim_cur = LONG_MAX; 1119 rlim.rlim_max = (unsigned long)bsd.rlp->rlim_max; 1120 if (rlim.rlim_max == ULONG_MAX) 1121 rlim.rlim_max = LONG_MAX; 1122 return (copyout(&rlim, (caddr_t)args->rlim, sizeof(rlim))); 1123 } 1124 1125 int 1126 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1127 { 1128 struct __getrlimit_args bsd; 1129 struct l_rlimit rlim; 1130 int error; 1131 caddr_t sg = stackgap_init(); 1132 1133 #ifdef DEBUG 1134 if (ldebug(getrlimit)) 1135 printf(ARGS(getrlimit, "%d, %p"), 1136 args->resource, (void *)args->rlim); 1137 #endif 1138 1139 if (args->resource >= LINUX_RLIM_NLIMITS) 1140 return (EINVAL); 1141 1142 bsd.which = linux_to_bsd_resource[args->resource]; 1143 if (bsd.which == -1) 1144 return (EINVAL); 1145 1146 bsd.rlp = stackgap_alloc(&sg, sizeof(struct rlimit)); 1147 error = getrlimit(td, &bsd); 1148 if (error) 1149 return (error); 1150 1151 rlim.rlim_cur = (l_ulong)bsd.rlp->rlim_cur; 1152 rlim.rlim_max = (l_ulong)bsd.rlp->rlim_max; 1153 return (copyout(&rlim, (caddr_t)args->rlim, sizeof(rlim))); 1154 } 1155 #endif /*!__alpha__*/ 1156 1157 int 1158 linux_sched_setscheduler(struct thread *td, 1159 struct linux_sched_setscheduler_args *args) 1160 { 1161 struct sched_setscheduler_args bsd; 1162 1163 #ifdef DEBUG 1164 if (ldebug(sched_setscheduler)) 1165 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1166 args->pid, args->policy, (const void *)args->param); 1167 #endif 1168 1169 switch (args->policy) { 1170 case LINUX_SCHED_OTHER: 1171 bsd.policy = SCHED_OTHER; 1172 break; 1173 case LINUX_SCHED_FIFO: 1174 bsd.policy = SCHED_FIFO; 1175 break; 1176 case LINUX_SCHED_RR: 1177 bsd.policy = SCHED_RR; 1178 break; 1179 default: 1180 return EINVAL; 1181 } 1182 1183 bsd.pid = args->pid; 1184 bsd.param = (struct sched_param *)args->param; 1185 return sched_setscheduler(td, &bsd); 1186 } 1187 1188 int 1189 linux_sched_getscheduler(struct thread *td, 1190 struct linux_sched_getscheduler_args *args) 1191 { 1192 struct sched_getscheduler_args bsd; 1193 int error; 1194 1195 #ifdef DEBUG 1196 if (ldebug(sched_getscheduler)) 1197 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1198 #endif 1199 1200 bsd.pid = args->pid; 1201 error = sched_getscheduler(td, &bsd); 1202 1203 switch (td->td_retval[0]) { 1204 case SCHED_OTHER: 1205 td->td_retval[0] = LINUX_SCHED_OTHER; 1206 break; 1207 case SCHED_FIFO: 1208 td->td_retval[0] = LINUX_SCHED_FIFO; 1209 break; 1210 case SCHED_RR: 1211 td->td_retval[0] = LINUX_SCHED_RR; 1212 break; 1213 } 1214 1215 return error; 1216 } 1217 1218 int 1219 linux_sched_get_priority_max(struct thread *td, 1220 struct linux_sched_get_priority_max_args *args) 1221 { 1222 struct sched_get_priority_max_args bsd; 1223 1224 #ifdef DEBUG 1225 if (ldebug(sched_get_priority_max)) 1226 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1227 #endif 1228 1229 switch (args->policy) { 1230 case LINUX_SCHED_OTHER: 1231 bsd.policy = SCHED_OTHER; 1232 break; 1233 case LINUX_SCHED_FIFO: 1234 bsd.policy = SCHED_FIFO; 1235 break; 1236 case LINUX_SCHED_RR: 1237 bsd.policy = SCHED_RR; 1238 break; 1239 default: 1240 return EINVAL; 1241 } 1242 return sched_get_priority_max(td, &bsd); 1243 } 1244 1245 int 1246 linux_sched_get_priority_min(struct thread *td, 1247 struct linux_sched_get_priority_min_args *args) 1248 { 1249 struct sched_get_priority_min_args bsd; 1250 1251 #ifdef DEBUG 1252 if (ldebug(sched_get_priority_min)) 1253 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1254 #endif 1255 1256 switch (args->policy) { 1257 case LINUX_SCHED_OTHER: 1258 bsd.policy = SCHED_OTHER; 1259 break; 1260 case LINUX_SCHED_FIFO: 1261 bsd.policy = SCHED_FIFO; 1262 break; 1263 case LINUX_SCHED_RR: 1264 bsd.policy = SCHED_RR; 1265 break; 1266 default: 1267 return EINVAL; 1268 } 1269 return sched_get_priority_min(td, &bsd); 1270 } 1271 1272 #define REBOOT_CAD_ON 0x89abcdef 1273 #define REBOOT_CAD_OFF 0 1274 #define REBOOT_HALT 0xcdef0123 1275 1276 int 1277 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1278 { 1279 struct reboot_args bsd_args; 1280 1281 #ifdef DEBUG 1282 if (ldebug(reboot)) 1283 printf(ARGS(reboot, "0x%x"), args->cmd); 1284 #endif 1285 if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF) 1286 return (0); 1287 bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0; 1288 return (reboot(td, &bsd_args)); 1289 } 1290 1291 #ifndef __alpha__ 1292 1293 /* 1294 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1295 * td->td_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This 1296 * globbers registers that are assumed to be preserved. The following 1297 * lightweight syscalls fixes this. See also linux_getgid16() and 1298 * linux_getuid16() in linux_uid16.c. 1299 * 1300 * linux_getpid() - MP SAFE 1301 * linux_getgid() - MP SAFE 1302 * linux_getuid() - MP SAFE 1303 */ 1304 1305 int 1306 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1307 { 1308 1309 td->td_retval[0] = td->td_proc->p_pid; 1310 return (0); 1311 } 1312 1313 int 1314 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1315 { 1316 1317 td->td_retval[0] = td->td_ucred->cr_rgid; 1318 return (0); 1319 } 1320 1321 int 1322 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1323 { 1324 1325 td->td_retval[0] = td->td_ucred->cr_ruid; 1326 return (0); 1327 } 1328 1329 #endif /*!__alpha__*/ 1330 1331 int 1332 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1333 { 1334 struct getsid_args bsd; 1335 bsd.pid = args->pid; 1336 return getsid(td, &bsd); 1337 } 1338