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/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/mman.h> 40 #include <sys/mount.h> 41 #include <sys/mutex.h> 42 #include <sys/namei.h> 43 #include <sys/poll.h> 44 #include <sys/proc.h> 45 #include <sys/blist.h> 46 #include <sys/reboot.h> 47 #include <sys/resourcevar.h> 48 #include <sys/signalvar.h> 49 #include <sys/stat.h> 50 #include <sys/sysctl.h> 51 #include <sys/sysproto.h> 52 #include <sys/time.h> 53 #include <sys/unistd.h> 54 #include <sys/vmmeter.h> 55 #include <sys/vnode.h> 56 #include <sys/wait.h> 57 58 #include <vm/vm.h> 59 #include <vm/pmap.h> 60 #include <vm/vm_kern.h> 61 #include <vm/vm_map.h> 62 #include <vm/vm_extern.h> 63 #include <vm/vm_object.h> 64 #include <vm/vm_zone.h> 65 #include <vm/swap_pager.h> 66 67 #include <machine/frame.h> 68 #include <machine/limits.h> 69 #include <machine/psl.h> 70 #include <machine/sysarch.h> 71 #ifdef __i386__ 72 #include <machine/segments.h> 73 #endif 74 75 #include <posix4/sched.h> 76 77 #include <machine/../linux/linux.h> 78 #include <machine/../linux/linux_proto.h> 79 #include <compat/linux/linux_mib.h> 80 #include <compat/linux/linux_util.h> 81 82 #ifdef __alpha__ 83 #define BSD_TO_LINUX_SIGNAL(sig) (sig) 84 #else 85 #define BSD_TO_LINUX_SIGNAL(sig) \ 86 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig) 87 #endif 88 89 #ifndef __alpha__ 90 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = { 91 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK, 92 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE, 93 RLIMIT_MEMLOCK, -1 94 }; 95 #endif /*!__alpha__*/ 96 97 struct l_sysinfo { 98 l_long uptime; /* Seconds since boot */ 99 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */ 100 l_ulong totalram; /* Total usable main memory size */ 101 l_ulong freeram; /* Available memory size */ 102 l_ulong sharedram; /* Amount of shared memory */ 103 l_ulong bufferram; /* Memory used by buffers */ 104 l_ulong totalswap; /* Total swap space size */ 105 l_ulong freeswap; /* swap space still available */ 106 l_ushort procs; /* Number of current processes */ 107 char _f[22]; /* Pads structure to 64 bytes */ 108 }; 109 #ifndef __alpha__ 110 int 111 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 112 { 113 struct l_sysinfo sysinfo; 114 vm_object_t object; 115 int i; 116 struct timespec ts; 117 118 /* Uptime is copied out of print_uptime() in kern_shutdown.c */ 119 getnanouptime(&ts); 120 i = 0; 121 if (ts.tv_sec >= 86400) { 122 ts.tv_sec %= 86400; 123 i = 1; 124 } 125 if (i || ts.tv_sec >= 3600) { 126 ts.tv_sec %= 3600; 127 i = 1; 128 } 129 if (i || ts.tv_sec >= 60) { 130 ts.tv_sec %= 60; 131 i = 1; 132 } 133 sysinfo.uptime=ts.tv_sec; 134 135 /* Use the information from the mib to get our load averages */ 136 for (i = 0; i < 3; i++) 137 sysinfo.loads[i] = averunnable.ldavg[i]; 138 139 sysinfo.totalram = physmem * PAGE_SIZE; 140 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 141 142 sysinfo.sharedram = 0; 143 for (object = TAILQ_FIRST(&vm_object_list); object != NULL; 144 object = TAILQ_NEXT(object, object_list)) 145 if (object->shadow_count > 1) 146 sysinfo.sharedram += object->resident_page_count; 147 148 sysinfo.sharedram *= PAGE_SIZE; 149 sysinfo.bufferram = 0; 150 151 if (swapblist == NULL) { 152 sysinfo.totalswap= 0; 153 sysinfo.freeswap = 0; 154 } else { 155 sysinfo.totalswap = swapblist->bl_blocks * 1024; 156 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE; 157 } 158 159 sysinfo.procs = 20; /* Hack */ 160 161 return copyout(&sysinfo, (caddr_t)args->info, sizeof(sysinfo)); 162 } 163 #endif /*!__alpha__*/ 164 165 #ifndef __alpha__ 166 int 167 linux_alarm(struct thread *td, struct linux_alarm_args *args) 168 { 169 struct itimerval it, old_it; 170 struct timeval tv; 171 int s; 172 173 #ifdef DEBUG 174 if (ldebug(alarm)) 175 printf(ARGS(alarm, "%u"), args->secs); 176 #endif 177 178 if (args->secs > 100000000) 179 return EINVAL; 180 181 it.it_value.tv_sec = (long)args->secs; 182 it.it_value.tv_usec = 0; 183 it.it_interval.tv_sec = 0; 184 it.it_interval.tv_usec = 0; 185 s = splsoftclock(); 186 old_it = td->td_proc->p_realtimer; 187 getmicrouptime(&tv); 188 if (timevalisset(&old_it.it_value)) 189 callout_stop(&td->td_proc->p_itcallout); 190 if (it.it_value.tv_sec != 0) { 191 callout_reset(&td->td_proc->p_itcallout, tvtohz(&it.it_value), 192 realitexpire, td->td_proc); 193 timevaladd(&it.it_value, &tv); 194 } 195 td->td_proc->p_realtimer = it; 196 splx(s); 197 if (timevalcmp(&old_it.it_value, &tv, >)) { 198 timevalsub(&old_it.it_value, &tv); 199 if (old_it.it_value.tv_usec != 0) 200 old_it.it_value.tv_sec++; 201 td->td_retval[0] = old_it.it_value.tv_sec; 202 } 203 return 0; 204 } 205 #endif /*!__alpha__*/ 206 207 int 208 linux_brk(struct thread *td, struct linux_brk_args *args) 209 { 210 struct vmspace *vm = td->td_proc->p_vmspace; 211 vm_offset_t new, old; 212 struct obreak_args /* { 213 char * nsize; 214 } */ tmp; 215 216 #ifdef DEBUG 217 if (ldebug(brk)) 218 printf(ARGS(brk, "%p"), (void *)args->dsend); 219 #endif 220 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 221 new = (vm_offset_t)args->dsend; 222 tmp.nsize = (char *) new; 223 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 224 td->td_retval[0] = (long)new; 225 else 226 td->td_retval[0] = (long)old; 227 228 return 0; 229 } 230 231 int 232 linux_uselib(struct thread *td, struct linux_uselib_args *args) 233 { 234 struct nameidata ni; 235 struct vnode *vp; 236 struct exec *a_out; 237 struct vattr attr; 238 vm_offset_t vmaddr; 239 unsigned long file_offset; 240 vm_offset_t buffer; 241 unsigned long bss_size; 242 int error; 243 caddr_t sg; 244 int locked; 245 246 sg = stackgap_init(); 247 CHECKALTEXIST(td, &sg, args->library); 248 249 #ifdef DEBUG 250 if (ldebug(uselib)) 251 printf(ARGS(uselib, "%s"), args->library); 252 #endif 253 254 a_out = NULL; 255 locked = 0; 256 vp = NULL; 257 258 NDINIT(&ni, LOOKUP, FOLLOW|LOCKLEAF, UIO_USERSPACE, args->library, td); 259 error = namei(&ni); 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_proc->p_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_proc->p_ucred, td); 304 if (error) 305 goto cleanup; 306 307 error = VOP_OPEN(vp, FREAD, td->td_proc->p_ucred, td); 308 if (error) 309 goto cleanup; 310 311 /* 312 * Lock no longer needed 313 */ 314 VOP_UNLOCK(vp, 0, td); 315 locked = 0; 316 317 /* Pull in executable header into kernel_map */ 318 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 319 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 320 if (error) 321 goto cleanup; 322 323 /* Is it a Linux binary ? */ 324 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 325 error = ENOEXEC; 326 goto cleanup; 327 } 328 329 /* 330 * While we are here, we should REALLY do some more checks 331 */ 332 333 /* Set file/virtual offset based on a.out variant. */ 334 switch ((int)(a_out->a_magic & 0xffff)) { 335 case 0413: /* ZMAGIC */ 336 file_offset = 1024; 337 break; 338 case 0314: /* QMAGIC */ 339 file_offset = 0; 340 break; 341 default: 342 error = ENOEXEC; 343 goto cleanup; 344 } 345 346 bss_size = round_page(a_out->a_bss); 347 348 /* Check various fields in header for validity/bounds. */ 349 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 350 error = ENOEXEC; 351 goto cleanup; 352 } 353 354 /* text + data can't exceed file size */ 355 if (a_out->a_data + a_out->a_text > attr.va_size) { 356 error = EFAULT; 357 goto cleanup; 358 } 359 360 /* To protect td->td_proc->p_rlimit in the if condition. */ 361 mtx_assert(&Giant, MA_OWNED); 362 363 /* 364 * text/data/bss must not exceed limits 365 * XXX - this is not complete. it should check current usage PLUS 366 * the resources needed by this library. 367 */ 368 if (a_out->a_text > maxtsiz || 369 a_out->a_data + bss_size > 370 td->td_proc->p_rlimit[RLIMIT_DATA].rlim_cur) { 371 error = ENOMEM; 372 goto cleanup; 373 } 374 375 /* prevent more writers */ 376 vp->v_flag |= VTEXT; 377 378 /* 379 * Check if file_offset page aligned. Currently we cannot handle 380 * misalinged file offsets, and so we read in the entire image 381 * (what a waste). 382 */ 383 if (file_offset & PAGE_MASK) { 384 #ifdef DEBUG 385 printf("uselib: Non page aligned binary %lu\n", file_offset); 386 #endif 387 /* Map text+data read/write/execute */ 388 389 /* a_entry is the load address and is page aligned */ 390 vmaddr = trunc_page(a_out->a_entry); 391 392 /* get anon user mapping, read+write+execute */ 393 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 394 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 395 VM_PROT_ALL, 0); 396 if (error) 397 goto cleanup; 398 399 /* map file into kernel_map */ 400 error = vm_mmap(kernel_map, &buffer, 401 round_page(a_out->a_text + a_out->a_data + file_offset), 402 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 403 trunc_page(file_offset)); 404 if (error) 405 goto cleanup; 406 407 /* copy from kernel VM space to user space */ 408 error = copyout((caddr_t)(uintptr_t)(buffer + file_offset), 409 (caddr_t)vmaddr, a_out->a_text + a_out->a_data); 410 411 /* release temporary kernel space */ 412 vm_map_remove(kernel_map, buffer, buffer + 413 round_page(a_out->a_text + a_out->a_data + file_offset)); 414 415 if (error) 416 goto cleanup; 417 } else { 418 #ifdef DEBUG 419 printf("uselib: Page aligned binary %lu\n", file_offset); 420 #endif 421 /* 422 * for QMAGIC, a_entry is 20 bytes beyond the load address 423 * to skip the executable header 424 */ 425 vmaddr = trunc_page(a_out->a_entry); 426 427 /* 428 * Map it all into the process's space as a single 429 * copy-on-write "data" segment. 430 */ 431 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 432 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 433 MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset); 434 if (error) 435 goto cleanup; 436 } 437 #ifdef DEBUG 438 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0], 439 ((long*)vmaddr)[1]); 440 #endif 441 if (bss_size != 0) { 442 /* Calculate BSS start address */ 443 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 444 a_out->a_data; 445 446 /* allocate some 'anon' space */ 447 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 448 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 449 if (error) 450 goto cleanup; 451 } 452 453 cleanup: 454 /* Unlock vnode if needed */ 455 if (locked) 456 VOP_UNLOCK(vp, 0, td); 457 458 /* Release the kernel mapping. */ 459 if (a_out) 460 vm_map_remove(kernel_map, (vm_offset_t)a_out, 461 (vm_offset_t)a_out + PAGE_SIZE); 462 463 return error; 464 } 465 466 int 467 linux_select(struct thread *td, struct linux_select_args *args) 468 { 469 struct select_args bsa; 470 struct timeval tv0, tv1, utv, *tvp; 471 caddr_t sg; 472 int error; 473 474 #ifdef DEBUG 475 if (ldebug(select)) 476 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 477 (void *)args->readfds, (void *)args->writefds, 478 (void *)args->exceptfds, (void *)args->timeout); 479 #endif 480 481 error = 0; 482 bsa.nd = args->nfds; 483 bsa.in = args->readfds; 484 bsa.ou = args->writefds; 485 bsa.ex = args->exceptfds; 486 bsa.tv = (struct timeval *)args->timeout; 487 488 /* 489 * Store current time for computation of the amount of 490 * time left. 491 */ 492 if (args->timeout) { 493 if ((error = copyin((caddr_t)args->timeout, &utv, 494 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 sg = stackgap_init(); 508 tvp = stackgap_alloc(&sg, sizeof(utv)); 509 utv.tv_sec += utv.tv_usec / 1000000; 510 utv.tv_usec %= 1000000; 511 if (utv.tv_usec < 0) { 512 utv.tv_sec -= 1; 513 utv.tv_usec += 1000000; 514 } 515 if (utv.tv_sec < 0) 516 timevalclear(&utv); 517 if ((error = copyout(&utv, tvp, sizeof(utv)))) 518 goto select_out; 519 bsa.tv = tvp; 520 } 521 microtime(&tv0); 522 } 523 524 error = select(td, &bsa); 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 : (u_long)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 *osrelease, *osname; 692 693 #ifdef DEBUG 694 if (ldebug(newuname)) 695 printf(ARGS(newuname, "*")); 696 #endif 697 698 osname = linux_get_osname(td->td_proc); 699 osrelease = linux_get_osrelease(td->td_proc); 700 701 bzero(&utsname, sizeof(utsname)); 702 strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1); 703 strncpy(utsname.nodename, hostname, LINUX_MAX_UTSNAME-1); 704 strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1); 705 strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1); 706 strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1); 707 strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1); 708 709 return (copyout(&utsname, (caddr_t)args->buf, sizeof(utsname))); 710 } 711 712 #if defined(__i386__) 713 struct l_utimbuf { 714 l_time_t l_actime; 715 l_time_t l_modtime; 716 }; 717 718 int 719 linux_utime(struct thread *td, struct linux_utime_args *args) 720 { 721 struct utimes_args /* { 722 char *path; 723 struct timeval *tptr; 724 } */ bsdutimes; 725 struct timeval tv[2], *tvp; 726 struct l_utimbuf lut; 727 int error; 728 caddr_t sg; 729 730 sg = stackgap_init(); 731 CHECKALTEXIST(td, &sg, args->fname); 732 733 #ifdef DEBUG 734 if (ldebug(utime)) 735 printf(ARGS(utime, "%s, *"), args->fname); 736 #endif 737 738 if (args->times) { 739 if ((error = copyin((caddr_t)args->times, &lut, sizeof lut))) 740 return error; 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 /* so that utimes can copyin */ 746 tvp = (struct timeval *)stackgap_alloc(&sg, sizeof(tv)); 747 if (tvp == NULL) 748 return (ENAMETOOLONG); 749 if ((error = copyout(tv, tvp, sizeof(tv)))) 750 return error; 751 bsdutimes.tptr = tvp; 752 } else 753 bsdutimes.tptr = NULL; 754 755 bsdutimes.path = args->fname; 756 return utimes(td, &bsdutimes); 757 } 758 #endif /* __i386__ */ 759 760 #define __WCLONE 0x80000000 761 762 #ifndef __alpha__ 763 int 764 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 765 { 766 struct wait_args /* { 767 int pid; 768 int *status; 769 int options; 770 struct rusage *rusage; 771 } */ tmp; 772 int error, tmpstat; 773 774 #ifdef DEBUG 775 if (ldebug(waitpid)) 776 printf(ARGS(waitpid, "%d, %p, %d"), 777 args->pid, (void *)args->status, args->options); 778 #endif 779 780 tmp.pid = args->pid; 781 tmp.status = args->status; 782 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 783 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 784 if (args->options & __WCLONE) 785 tmp.options |= WLINUXCLONE; 786 tmp.rusage = NULL; 787 788 if ((error = wait4(td, &tmp)) != 0) 789 return error; 790 791 if (args->status) { 792 if ((error = copyin((caddr_t)args->status, &tmpstat, 793 sizeof(int))) != 0) 794 return error; 795 tmpstat &= 0xffff; 796 if (WIFSIGNALED(tmpstat)) 797 tmpstat = (tmpstat & 0xffffff80) | 798 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 799 else if (WIFSTOPPED(tmpstat)) 800 tmpstat = (tmpstat & 0xffff00ff) | 801 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 802 return copyout(&tmpstat, (caddr_t)args->status, sizeof(int)); 803 } 804 805 return 0; 806 } 807 #endif /*!__alpha__*/ 808 809 int 810 linux_wait4(struct thread *td, struct linux_wait4_args *args) 811 { 812 struct wait_args /* { 813 int pid; 814 int *status; 815 int options; 816 struct rusage *rusage; 817 } */ tmp; 818 int error, tmpstat; 819 820 #ifdef DEBUG 821 if (ldebug(wait4)) 822 printf(ARGS(wait4, "%d, %p, %d, %p"), 823 args->pid, (void *)args->status, args->options, 824 (void *)args->rusage); 825 #endif 826 827 tmp.pid = args->pid; 828 tmp.status = args->status; 829 tmp.options = (args->options & (WNOHANG | WUNTRACED)); 830 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 831 if (args->options & __WCLONE) 832 tmp.options |= WLINUXCLONE; 833 tmp.rusage = (struct rusage *)args->rusage; 834 835 if ((error = wait4(td, &tmp)) != 0) 836 return error; 837 838 SIGDELSET(td->td_proc->p_siglist, SIGCHLD); 839 840 if (args->status) { 841 if ((error = copyin((caddr_t)args->status, &tmpstat, 842 sizeof(int))) != 0) 843 return error; 844 tmpstat &= 0xffff; 845 if (WIFSIGNALED(tmpstat)) 846 tmpstat = (tmpstat & 0xffffff80) | 847 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 848 else if (WIFSTOPPED(tmpstat)) 849 tmpstat = (tmpstat & 0xffff00ff) | 850 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 851 return copyout(&tmpstat, (caddr_t)args->status, sizeof(int)); 852 } 853 854 return 0; 855 } 856 857 int 858 linux_mknod(struct thread *td, struct linux_mknod_args *args) 859 { 860 caddr_t sg; 861 struct mknod_args bsd_mknod; 862 struct mkfifo_args bsd_mkfifo; 863 864 sg = stackgap_init(); 865 866 CHECKALTCREAT(td, &sg, args->path); 867 868 #ifdef DEBUG 869 if (ldebug(mknod)) 870 printf(ARGS(mknod, "%s, %d, %d"), 871 args->path, args->mode, args->dev); 872 #endif 873 874 if (args->mode & S_IFIFO) { 875 bsd_mkfifo.path = args->path; 876 bsd_mkfifo.mode = args->mode; 877 return mkfifo(td, &bsd_mkfifo); 878 } else { 879 bsd_mknod.path = args->path; 880 bsd_mknod.mode = args->mode; 881 bsd_mknod.dev = args->dev; 882 return mknod(td, &bsd_mknod); 883 } 884 } 885 886 /* 887 * UGH! This is just about the dumbest idea I've ever heard!! 888 */ 889 int 890 linux_personality(struct thread *td, struct linux_personality_args *args) 891 { 892 #ifdef DEBUG 893 if (ldebug(personality)) 894 printf(ARGS(personality, "%d"), args->per); 895 #endif 896 #ifndef __alpha__ 897 if (args->per != 0) 898 return EINVAL; 899 #endif 900 901 /* Yes Jim, it's still a Linux... */ 902 td->td_retval[0] = 0; 903 return 0; 904 } 905 906 /* 907 * Wrappers for get/setitimer for debugging.. 908 */ 909 int 910 linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 911 { 912 struct setitimer_args bsa; 913 struct itimerval foo; 914 int error; 915 916 #ifdef DEBUG 917 if (ldebug(setitimer)) 918 printf(ARGS(setitimer, "%p, %p"), 919 (void *)args->itv, (void *)args->oitv); 920 #endif 921 bsa.which = args->which; 922 bsa.itv = (struct itimerval *)args->itv; 923 bsa.oitv = (struct itimerval *)args->oitv; 924 if (args->itv) { 925 if ((error = copyin((caddr_t)args->itv, &foo, sizeof(foo)))) 926 return error; 927 #ifdef DEBUG 928 if (ldebug(setitimer)) { 929 printf("setitimer: value: sec: %ld, usec: %ld\n", 930 foo.it_value.tv_sec, foo.it_value.tv_usec); 931 printf("setitimer: interval: sec: %ld, usec: %ld\n", 932 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 933 } 934 #endif 935 } 936 return setitimer(td, &bsa); 937 } 938 939 int 940 linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 941 { 942 struct getitimer_args bsa; 943 #ifdef DEBUG 944 if (ldebug(getitimer)) 945 printf(ARGS(getitimer, "%p"), (void *)args->itv); 946 #endif 947 bsa.which = args->which; 948 bsa.itv = (struct itimerval *)args->itv; 949 return getitimer(td, &bsa); 950 } 951 952 #ifndef __alpha__ 953 int 954 linux_nice(struct thread *td, struct linux_nice_args *args) 955 { 956 struct setpriority_args bsd_args; 957 958 bsd_args.which = PRIO_PROCESS; 959 bsd_args.who = 0; /* current process */ 960 bsd_args.prio = args->inc; 961 return setpriority(td, &bsd_args); 962 } 963 #endif /*!__alpha__*/ 964 965 int 966 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 967 { 968 struct ucred *newcred, *oldcred; 969 l_gid_t linux_gidset[NGROUPS]; 970 gid_t *bsd_gidset; 971 int ngrp, error; 972 973 ngrp = args->gidsetsize; 974 oldcred = td->td_proc->p_ucred; 975 976 /* 977 * cr_groups[0] holds egid. Setting the whole set from 978 * the supplied set will cause egid to be changed too. 979 * Keep cr_groups[0] unchanged to prevent that. 980 */ 981 982 if ((error = suser_xxx(oldcred, NULL, PRISON_ROOT)) != 0) 983 return (error); 984 985 if (ngrp >= NGROUPS) 986 return (EINVAL); 987 988 newcred = crdup(oldcred); 989 if (ngrp > 0) { 990 error = copyin((caddr_t)args->grouplist, linux_gidset, 991 ngrp * sizeof(l_gid_t)); 992 if (error) 993 return (error); 994 995 newcred->cr_ngroups = ngrp + 1; 996 997 bsd_gidset = newcred->cr_groups; 998 ngrp--; 999 while (ngrp >= 0) { 1000 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1001 ngrp--; 1002 } 1003 } 1004 else 1005 newcred->cr_ngroups = 1; 1006 1007 setsugid(td->td_proc); 1008 td->td_proc->p_ucred = newcred; 1009 crfree(oldcred); 1010 return (0); 1011 } 1012 1013 int 1014 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1015 { 1016 struct ucred *cred; 1017 l_gid_t linux_gidset[NGROUPS]; 1018 gid_t *bsd_gidset; 1019 int bsd_gidsetsz, ngrp, error; 1020 1021 cred = td->td_proc->p_ucred; 1022 bsd_gidset = cred->cr_groups; 1023 bsd_gidsetsz = cred->cr_ngroups - 1; 1024 1025 /* 1026 * cr_groups[0] holds egid. Returning the whole set 1027 * here will cause a duplicate. Exclude cr_groups[0] 1028 * to prevent that. 1029 */ 1030 1031 if ((ngrp = args->gidsetsize) == 0) { 1032 td->td_retval[0] = bsd_gidsetsz; 1033 return (0); 1034 } 1035 1036 if (ngrp < bsd_gidsetsz) 1037 return (EINVAL); 1038 1039 ngrp = 0; 1040 while (ngrp < bsd_gidsetsz) { 1041 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1042 ngrp++; 1043 } 1044 1045 if ((error = copyout(linux_gidset, (caddr_t)args->grouplist, 1046 ngrp * sizeof(l_gid_t)))) 1047 return (error); 1048 1049 td->td_retval[0] = ngrp; 1050 return (0); 1051 } 1052 1053 #ifndef __alpha__ 1054 int 1055 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1056 { 1057 struct __setrlimit_args bsd; 1058 struct l_rlimit rlim; 1059 int error; 1060 caddr_t sg = stackgap_init(); 1061 1062 #ifdef DEBUG 1063 if (ldebug(setrlimit)) 1064 printf(ARGS(setrlimit, "%d, %p"), 1065 args->resource, (void *)args->rlim); 1066 #endif 1067 1068 if (args->resource >= LINUX_RLIM_NLIMITS) 1069 return (EINVAL); 1070 1071 bsd.which = linux_to_bsd_resource[args->resource]; 1072 if (bsd.which == -1) 1073 return (EINVAL); 1074 1075 error = copyin((caddr_t)args->rlim, &rlim, sizeof(rlim)); 1076 if (error) 1077 return (error); 1078 1079 bsd.rlp = stackgap_alloc(&sg, sizeof(struct rlimit)); 1080 bsd.rlp->rlim_cur = (rlim_t)rlim.rlim_cur; 1081 bsd.rlp->rlim_max = (rlim_t)rlim.rlim_max; 1082 return (setrlimit(td, &bsd)); 1083 } 1084 1085 int 1086 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1087 { 1088 struct __getrlimit_args bsd; 1089 struct l_rlimit rlim; 1090 int error; 1091 caddr_t sg = stackgap_init(); 1092 1093 #ifdef DEBUG 1094 if (ldebug(old_getrlimit)) 1095 printf(ARGS(old_getrlimit, "%d, %p"), 1096 args->resource, (void *)args->rlim); 1097 #endif 1098 1099 if (args->resource >= LINUX_RLIM_NLIMITS) 1100 return (EINVAL); 1101 1102 bsd.which = linux_to_bsd_resource[args->resource]; 1103 if (bsd.which == -1) 1104 return (EINVAL); 1105 1106 bsd.rlp = stackgap_alloc(&sg, sizeof(struct rlimit)); 1107 error = getrlimit(td, &bsd); 1108 if (error) 1109 return (error); 1110 1111 rlim.rlim_cur = (unsigned long)bsd.rlp->rlim_cur; 1112 if (rlim.rlim_cur == ULONG_MAX) 1113 rlim.rlim_cur = LONG_MAX; 1114 rlim.rlim_max = (unsigned long)bsd.rlp->rlim_max; 1115 if (rlim.rlim_max == ULONG_MAX) 1116 rlim.rlim_max = LONG_MAX; 1117 return (copyout(&rlim, (caddr_t)args->rlim, sizeof(rlim))); 1118 } 1119 1120 int 1121 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1122 { 1123 struct __getrlimit_args bsd; 1124 struct l_rlimit rlim; 1125 int error; 1126 caddr_t sg = stackgap_init(); 1127 1128 #ifdef DEBUG 1129 if (ldebug(getrlimit)) 1130 printf(ARGS(getrlimit, "%d, %p"), 1131 args->resource, (void *)args->rlim); 1132 #endif 1133 1134 if (args->resource >= LINUX_RLIM_NLIMITS) 1135 return (EINVAL); 1136 1137 bsd.which = linux_to_bsd_resource[args->resource]; 1138 if (bsd.which == -1) 1139 return (EINVAL); 1140 1141 bsd.rlp = stackgap_alloc(&sg, sizeof(struct rlimit)); 1142 error = getrlimit(td, &bsd); 1143 if (error) 1144 return (error); 1145 1146 rlim.rlim_cur = (l_ulong)bsd.rlp->rlim_cur; 1147 rlim.rlim_max = (l_ulong)bsd.rlp->rlim_max; 1148 return (copyout(&rlim, (caddr_t)args->rlim, sizeof(rlim))); 1149 } 1150 #endif /*!__alpha__*/ 1151 1152 int 1153 linux_sched_setscheduler(struct thread *td, 1154 struct linux_sched_setscheduler_args *args) 1155 { 1156 struct sched_setscheduler_args bsd; 1157 1158 #ifdef DEBUG 1159 if (ldebug(sched_setscheduler)) 1160 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1161 args->pid, args->policy, (const void *)args->param); 1162 #endif 1163 1164 switch (args->policy) { 1165 case LINUX_SCHED_OTHER: 1166 bsd.policy = SCHED_OTHER; 1167 break; 1168 case LINUX_SCHED_FIFO: 1169 bsd.policy = SCHED_FIFO; 1170 break; 1171 case LINUX_SCHED_RR: 1172 bsd.policy = SCHED_RR; 1173 break; 1174 default: 1175 return EINVAL; 1176 } 1177 1178 bsd.pid = args->pid; 1179 bsd.param = (struct sched_param *)args->param; 1180 return sched_setscheduler(td, &bsd); 1181 } 1182 1183 int 1184 linux_sched_getscheduler(struct thread *td, 1185 struct linux_sched_getscheduler_args *args) 1186 { 1187 struct sched_getscheduler_args bsd; 1188 int error; 1189 1190 #ifdef DEBUG 1191 if (ldebug(sched_getscheduler)) 1192 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1193 #endif 1194 1195 bsd.pid = args->pid; 1196 error = sched_getscheduler(td, &bsd); 1197 1198 switch (td->td_retval[0]) { 1199 case SCHED_OTHER: 1200 td->td_retval[0] = LINUX_SCHED_OTHER; 1201 break; 1202 case SCHED_FIFO: 1203 td->td_retval[0] = LINUX_SCHED_FIFO; 1204 break; 1205 case SCHED_RR: 1206 td->td_retval[0] = LINUX_SCHED_RR; 1207 break; 1208 } 1209 1210 return error; 1211 } 1212 1213 int 1214 linux_sched_get_priority_max(struct thread *td, 1215 struct linux_sched_get_priority_max_args *args) 1216 { 1217 struct sched_get_priority_max_args bsd; 1218 1219 #ifdef DEBUG 1220 if (ldebug(sched_get_priority_max)) 1221 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1222 #endif 1223 1224 switch (args->policy) { 1225 case LINUX_SCHED_OTHER: 1226 bsd.policy = SCHED_OTHER; 1227 break; 1228 case LINUX_SCHED_FIFO: 1229 bsd.policy = SCHED_FIFO; 1230 break; 1231 case LINUX_SCHED_RR: 1232 bsd.policy = SCHED_RR; 1233 break; 1234 default: 1235 return EINVAL; 1236 } 1237 return sched_get_priority_max(td, &bsd); 1238 } 1239 1240 int 1241 linux_sched_get_priority_min(struct thread *td, 1242 struct linux_sched_get_priority_min_args *args) 1243 { 1244 struct sched_get_priority_min_args bsd; 1245 1246 #ifdef DEBUG 1247 if (ldebug(sched_get_priority_min)) 1248 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1249 #endif 1250 1251 switch (args->policy) { 1252 case LINUX_SCHED_OTHER: 1253 bsd.policy = SCHED_OTHER; 1254 break; 1255 case LINUX_SCHED_FIFO: 1256 bsd.policy = SCHED_FIFO; 1257 break; 1258 case LINUX_SCHED_RR: 1259 bsd.policy = SCHED_RR; 1260 break; 1261 default: 1262 return EINVAL; 1263 } 1264 return sched_get_priority_min(td, &bsd); 1265 } 1266 1267 #define REBOOT_CAD_ON 0x89abcdef 1268 #define REBOOT_CAD_OFF 0 1269 #define REBOOT_HALT 0xcdef0123 1270 1271 int 1272 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1273 { 1274 struct reboot_args bsd_args; 1275 1276 #ifdef DEBUG 1277 if (ldebug(reboot)) 1278 printf(ARGS(reboot, "0x%x"), args->cmd); 1279 #endif 1280 if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF) 1281 return (0); 1282 bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0; 1283 return (reboot(td, &bsd_args)); 1284 } 1285 1286 /* 1287 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1288 * td->td_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This 1289 * globbers registers that are assumed to be preserved. The following 1290 * lightweight syscalls fixes this. See also linux_getgid16() and 1291 * linux_getuid16() in linux_uid16.c. 1292 * 1293 * linux_getpid() - MP SAFE 1294 * linux_getgid() - MP SAFE 1295 * linux_getuid() - MP SAFE 1296 */ 1297 1298 int 1299 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1300 { 1301 1302 td->td_retval[0] = td->td_proc->p_pid; 1303 return (0); 1304 } 1305 1306 int 1307 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1308 { 1309 1310 td->td_retval[0] = td->td_proc->p_ucred->cr_rgid; 1311 return (0); 1312 } 1313 1314 int 1315 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1316 { 1317 1318 td->td_retval[0] = td->td_proc->p_ucred->cr_ruid; 1319 return (0); 1320 } 1321 1322 int 1323 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1324 { 1325 struct getsid_args bsd; 1326 bsd.pid = args->pid; 1327 return getsid(td, &bsd); 1328 } 1329