1 /*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_mac.h" 33 34 #include <sys/param.h> 35 #include <sys/blist.h> 36 #include <sys/fcntl.h> 37 #include <sys/imgact_aout.h> 38 #include <sys/jail.h> 39 #include <sys/kernel.h> 40 #include <sys/limits.h> 41 #include <sys/lock.h> 42 #include <sys/mac.h> 43 #include <sys/malloc.h> 44 #include <sys/mman.h> 45 #include <sys/mount.h> 46 #include <sys/mutex.h> 47 #include <sys/namei.h> 48 #include <sys/proc.h> 49 #include <sys/reboot.h> 50 #include <sys/resourcevar.h> 51 #include <sys/signalvar.h> 52 #include <sys/stat.h> 53 #include <sys/syscallsubr.h> 54 #include <sys/sysctl.h> 55 #include <sys/sysproto.h> 56 #include <sys/systm.h> 57 #include <sys/time.h> 58 #include <sys/vmmeter.h> 59 #include <sys/vnode.h> 60 #include <sys/wait.h> 61 62 #include <vm/vm.h> 63 #include <vm/pmap.h> 64 #include <vm/vm_kern.h> 65 #include <vm/vm_map.h> 66 #include <vm/vm_extern.h> 67 #include <vm/vm_object.h> 68 #include <vm/swap_pager.h> 69 70 #include <posix4/sched.h> 71 72 #include <machine/../linux/linux.h> 73 #include <machine/../linux/linux_proto.h> 74 75 #include <compat/linux/linux_mib.h> 76 #include <compat/linux/linux_util.h> 77 78 #ifdef __i386__ 79 #include <machine/cputypes.h> 80 #endif 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 #define LINUX_SYSINFO_LOADS_SCALE 65536 101 l_ulong totalram; /* Total usable main memory size */ 102 l_ulong freeram; /* Available memory size */ 103 l_ulong sharedram; /* Amount of shared memory */ 104 l_ulong bufferram; /* Memory used by buffers */ 105 l_ulong totalswap; /* Total swap space size */ 106 l_ulong freeswap; /* swap space still available */ 107 l_ushort procs; /* Number of current processes */ 108 l_ulong totalbig; 109 l_ulong freebig; 110 l_uint mem_unit; 111 char _f[6]; /* Pads structure to 64 bytes */ 112 }; 113 #ifndef __alpha__ 114 int 115 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args) 116 { 117 struct l_sysinfo sysinfo; 118 vm_object_t object; 119 int i, j; 120 struct timespec ts; 121 122 /* Uptime is copied out of print_uptime() in kern_shutdown.c */ 123 getnanouptime(&ts); 124 i = 0; 125 if (ts.tv_sec >= 86400) { 126 ts.tv_sec %= 86400; 127 i = 1; 128 } 129 if (i || ts.tv_sec >= 3600) { 130 ts.tv_sec %= 3600; 131 i = 1; 132 } 133 if (i || ts.tv_sec >= 60) { 134 ts.tv_sec %= 60; 135 i = 1; 136 } 137 sysinfo.uptime=ts.tv_sec; 138 139 /* Use the information from the mib to get our load averages */ 140 for (i = 0; i < 3; i++) 141 sysinfo.loads[i] = averunnable.ldavg[i] * 142 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale; 143 144 sysinfo.totalram = physmem * PAGE_SIZE; 145 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE; 146 147 sysinfo.sharedram = 0; 148 mtx_lock(&vm_object_list_mtx); 149 TAILQ_FOREACH(object, &vm_object_list, object_list) 150 if (object->shadow_count > 1) 151 sysinfo.sharedram += object->resident_page_count; 152 mtx_unlock(&vm_object_list_mtx); 153 154 sysinfo.sharedram *= PAGE_SIZE; 155 sysinfo.bufferram = 0; 156 157 swap_pager_status(&i, &j); 158 sysinfo.totalswap= i * PAGE_SIZE; 159 sysinfo.freeswap = (i - j) * PAGE_SIZE; 160 161 sysinfo.procs = nprocs; 162 163 /* The following are only present in newer Linux kernels. */ 164 sysinfo.totalbig = 0; 165 sysinfo.freebig = 0; 166 sysinfo.mem_unit = 1; 167 168 return copyout(&sysinfo, args->info, sizeof(sysinfo)); 169 } 170 #endif /*!__alpha__*/ 171 172 #ifndef __alpha__ 173 int 174 linux_alarm(struct thread *td, struct linux_alarm_args *args) 175 { 176 struct itimerval it, old_it; 177 struct timeval tv; 178 struct proc *p; 179 180 #ifdef DEBUG 181 if (ldebug(alarm)) 182 printf(ARGS(alarm, "%u"), args->secs); 183 #endif 184 185 if (args->secs > 100000000) 186 return EINVAL; 187 188 it.it_value.tv_sec = (long)args->secs; 189 it.it_value.tv_usec = 0; 190 it.it_interval.tv_sec = 0; 191 it.it_interval.tv_usec = 0; 192 p = td->td_proc; 193 PROC_LOCK(p); 194 old_it = p->p_realtimer; 195 getmicrouptime(&tv); 196 if (timevalisset(&old_it.it_value)) 197 callout_stop(&p->p_itcallout); 198 if (it.it_value.tv_sec != 0) { 199 callout_reset(&p->p_itcallout, tvtohz(&it.it_value), 200 realitexpire, p); 201 timevaladd(&it.it_value, &tv); 202 } 203 p->p_realtimer = it; 204 PROC_UNLOCK(p); 205 if (timevalcmp(&old_it.it_value, &tv, >)) { 206 timevalsub(&old_it.it_value, &tv); 207 if (old_it.it_value.tv_usec != 0) 208 old_it.it_value.tv_sec++; 209 td->td_retval[0] = old_it.it_value.tv_sec; 210 } 211 return 0; 212 } 213 #endif /*!__alpha__*/ 214 215 int 216 linux_brk(struct thread *td, struct linux_brk_args *args) 217 { 218 struct vmspace *vm = td->td_proc->p_vmspace; 219 vm_offset_t new, old; 220 struct obreak_args /* { 221 char * nsize; 222 } */ tmp; 223 224 #ifdef DEBUG 225 if (ldebug(brk)) 226 printf(ARGS(brk, "%p"), (void *)args->dsend); 227 #endif 228 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize); 229 new = (vm_offset_t)args->dsend; 230 tmp.nsize = (char *) new; 231 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp)) 232 td->td_retval[0] = (long)new; 233 else 234 td->td_retval[0] = (long)old; 235 236 return 0; 237 } 238 239 int 240 linux_uselib(struct thread *td, struct linux_uselib_args *args) 241 { 242 struct nameidata ni; 243 struct vnode *vp; 244 struct exec *a_out; 245 struct vattr attr; 246 vm_offset_t vmaddr; 247 unsigned long file_offset; 248 vm_offset_t buffer; 249 unsigned long bss_size; 250 char *library; 251 int error; 252 int locked; 253 254 LCONVPATHEXIST(td, args->library, &library); 255 256 #ifdef DEBUG 257 if (ldebug(uselib)) 258 printf(ARGS(uselib, "%s"), library); 259 #endif 260 261 a_out = NULL; 262 locked = 0; 263 vp = NULL; 264 265 /* 266 * XXX: This code should make use of vn_open(), rather than doing 267 * all this stuff itself. 268 */ 269 NDINIT(&ni, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, library, td); 270 error = namei(&ni); 271 LFREEPATH(library); 272 if (error) 273 goto cleanup; 274 275 vp = ni.ni_vp; 276 /* 277 * XXX - This looks like a bogus check. A LOCKLEAF namei should not 278 * succeed without returning a vnode. 279 */ 280 if (vp == NULL) { 281 error = ENOEXEC; /* ?? */ 282 goto cleanup; 283 } 284 NDFREE(&ni, NDF_ONLY_PNBUF); 285 286 /* 287 * From here on down, we have a locked vnode that must be unlocked. 288 */ 289 locked++; 290 291 /* Writable? */ 292 if (vp->v_writecount) { 293 error = ETXTBSY; 294 goto cleanup; 295 } 296 297 /* Executable? */ 298 error = VOP_GETATTR(vp, &attr, td->td_ucred, td); 299 if (error) 300 goto cleanup; 301 302 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) || 303 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) { 304 error = ENOEXEC; 305 goto cleanup; 306 } 307 308 /* Sensible size? */ 309 if (attr.va_size == 0) { 310 error = ENOEXEC; 311 goto cleanup; 312 } 313 314 /* Can we access it? */ 315 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td); 316 if (error) 317 goto cleanup; 318 319 /* 320 * XXX: This should use vn_open() so that it is properly authorized, 321 * and to reduce code redundancy all over the place here. 322 */ 323 #ifdef MAC 324 error = mac_check_vnode_open(td->td_ucred, vp, FREAD); 325 if (error) 326 goto cleanup; 327 #endif 328 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, -1); 329 if (error) 330 goto cleanup; 331 332 /* Pull in executable header into kernel_map */ 333 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE, 334 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0); 335 /* 336 * Lock no longer needed 337 */ 338 locked = 0; 339 VOP_UNLOCK(vp, 0, td); 340 341 if (error) 342 goto cleanup; 343 344 /* Is it a Linux binary ? */ 345 if (((a_out->a_magic >> 16) & 0xff) != 0x64) { 346 error = ENOEXEC; 347 goto cleanup; 348 } 349 350 /* 351 * While we are here, we should REALLY do some more checks 352 */ 353 354 /* Set file/virtual offset based on a.out variant. */ 355 switch ((int)(a_out->a_magic & 0xffff)) { 356 case 0413: /* ZMAGIC */ 357 file_offset = 1024; 358 break; 359 case 0314: /* QMAGIC */ 360 file_offset = 0; 361 break; 362 default: 363 error = ENOEXEC; 364 goto cleanup; 365 } 366 367 bss_size = round_page(a_out->a_bss); 368 369 /* Check various fields in header for validity/bounds. */ 370 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) { 371 error = ENOEXEC; 372 goto cleanup; 373 } 374 375 /* text + data can't exceed file size */ 376 if (a_out->a_data + a_out->a_text > attr.va_size) { 377 error = EFAULT; 378 goto cleanup; 379 } 380 381 /* 382 * text/data/bss must not exceed limits 383 * XXX - this is not complete. it should check current usage PLUS 384 * the resources needed by this library. 385 */ 386 PROC_LOCK(td->td_proc); 387 if (a_out->a_text > maxtsiz || 388 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) { 389 PROC_UNLOCK(td->td_proc); 390 error = ENOMEM; 391 goto cleanup; 392 } 393 PROC_UNLOCK(td->td_proc); 394 395 mp_fixme("Unlocked vflags access."); 396 /* prevent more writers */ 397 vp->v_vflag |= VV_TEXT; 398 399 /* 400 * Check if file_offset page aligned. Currently we cannot handle 401 * misalinged file offsets, and so we read in the entire image 402 * (what a waste). 403 */ 404 if (file_offset & PAGE_MASK) { 405 #ifdef DEBUG 406 printf("uselib: Non page aligned binary %lu\n", file_offset); 407 #endif 408 /* Map text+data read/write/execute */ 409 410 /* a_entry is the load address and is page aligned */ 411 vmaddr = trunc_page(a_out->a_entry); 412 413 /* get anon user mapping, read+write+execute */ 414 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 415 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL, 416 VM_PROT_ALL, 0); 417 if (error) 418 goto cleanup; 419 420 /* map file into kernel_map */ 421 error = vm_mmap(kernel_map, &buffer, 422 round_page(a_out->a_text + a_out->a_data + file_offset), 423 VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 424 trunc_page(file_offset)); 425 if (error) 426 goto cleanup; 427 428 /* copy from kernel VM space to user space */ 429 error = copyout((void *)(uintptr_t)(buffer + file_offset), 430 (void *)vmaddr, a_out->a_text + a_out->a_data); 431 432 /* release temporary kernel space */ 433 vm_map_remove(kernel_map, buffer, buffer + 434 round_page(a_out->a_text + a_out->a_data + file_offset)); 435 436 if (error) 437 goto cleanup; 438 } else { 439 #ifdef DEBUG 440 printf("uselib: Page aligned binary %lu\n", file_offset); 441 #endif 442 /* 443 * for QMAGIC, a_entry is 20 bytes beyond the load address 444 * to skip the executable header 445 */ 446 vmaddr = trunc_page(a_out->a_entry); 447 448 /* 449 * Map it all into the process's space as a single 450 * copy-on-write "data" segment. 451 */ 452 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr, 453 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL, 454 MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset); 455 if (error) 456 goto cleanup; 457 } 458 #ifdef DEBUG 459 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0], 460 ((long*)vmaddr)[1]); 461 #endif 462 if (bss_size != 0) { 463 /* Calculate BSS start address */ 464 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + 465 a_out->a_data; 466 467 /* allocate some 'anon' space */ 468 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0, 469 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 470 if (error) 471 goto cleanup; 472 } 473 474 cleanup: 475 /* Unlock vnode if needed */ 476 if (locked) 477 VOP_UNLOCK(vp, 0, td); 478 479 /* Release the kernel mapping. */ 480 if (a_out) 481 vm_map_remove(kernel_map, (vm_offset_t)a_out, 482 (vm_offset_t)a_out + PAGE_SIZE); 483 484 return error; 485 } 486 487 int 488 linux_select(struct thread *td, struct linux_select_args *args) 489 { 490 struct timeval tv0, tv1, utv, *tvp; 491 int error; 492 493 #ifdef DEBUG 494 if (ldebug(select)) 495 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds, 496 (void *)args->readfds, (void *)args->writefds, 497 (void *)args->exceptfds, (void *)args->timeout); 498 #endif 499 500 /* 501 * Store current time for computation of the amount of 502 * time left. 503 */ 504 if (args->timeout) { 505 if ((error = copyin(args->timeout, &utv, sizeof(utv)))) 506 goto select_out; 507 #ifdef DEBUG 508 if (ldebug(select)) 509 printf(LMSG("incoming timeout (%ld/%ld)"), 510 utv.tv_sec, utv.tv_usec); 511 #endif 512 513 if (itimerfix(&utv)) { 514 /* 515 * The timeval was invalid. Convert it to something 516 * valid that will act as it does under Linux. 517 */ 518 utv.tv_sec += utv.tv_usec / 1000000; 519 utv.tv_usec %= 1000000; 520 if (utv.tv_usec < 0) { 521 utv.tv_sec -= 1; 522 utv.tv_usec += 1000000; 523 } 524 if (utv.tv_sec < 0) 525 timevalclear(&utv); 526 } 527 microtime(&tv0); 528 tvp = &utv; 529 } else 530 tvp = NULL; 531 532 error = kern_select(td, args->nfds, args->readfds, args->writefds, 533 args->exceptfds, tvp); 534 535 #ifdef DEBUG 536 if (ldebug(select)) 537 printf(LMSG("real select returns %d"), error); 538 #endif 539 if (error) { 540 /* 541 * See fs/select.c in the Linux kernel. Without this, 542 * Maelstrom doesn't work. 543 */ 544 if (error == ERESTART) 545 error = EINTR; 546 goto select_out; 547 } 548 549 if (args->timeout) { 550 if (td->td_retval[0]) { 551 /* 552 * Compute how much time was left of the timeout, 553 * by subtracting the current time and the time 554 * before we started the call, and subtracting 555 * that result from the user-supplied value. 556 */ 557 microtime(&tv1); 558 timevalsub(&tv1, &tv0); 559 timevalsub(&utv, &tv1); 560 if (utv.tv_sec < 0) 561 timevalclear(&utv); 562 } else 563 timevalclear(&utv); 564 #ifdef DEBUG 565 if (ldebug(select)) 566 printf(LMSG("outgoing timeout (%ld/%ld)"), 567 utv.tv_sec, utv.tv_usec); 568 #endif 569 if ((error = copyout(&utv, args->timeout, sizeof(utv)))) 570 goto select_out; 571 } 572 573 select_out: 574 #ifdef DEBUG 575 if (ldebug(select)) 576 printf(LMSG("select_out -> %d"), error); 577 #endif 578 return error; 579 } 580 581 int 582 linux_mremap(struct thread *td, struct linux_mremap_args *args) 583 { 584 struct munmap_args /* { 585 void *addr; 586 size_t len; 587 } */ bsd_args; 588 int error = 0; 589 590 #ifdef DEBUG 591 if (ldebug(mremap)) 592 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"), 593 (void *)args->addr, 594 (unsigned long)args->old_len, 595 (unsigned long)args->new_len, 596 (unsigned long)args->flags); 597 #endif 598 args->new_len = round_page(args->new_len); 599 args->old_len = round_page(args->old_len); 600 601 if (args->new_len > args->old_len) { 602 td->td_retval[0] = 0; 603 return ENOMEM; 604 } 605 606 if (args->new_len < args->old_len) { 607 bsd_args.addr = (caddr_t)(args->addr + args->new_len); 608 bsd_args.len = args->old_len - args->new_len; 609 error = munmap(td, &bsd_args); 610 } 611 612 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr; 613 return error; 614 } 615 616 #define LINUX_MS_ASYNC 0x0001 617 #define LINUX_MS_INVALIDATE 0x0002 618 #define LINUX_MS_SYNC 0x0004 619 620 int 621 linux_msync(struct thread *td, struct linux_msync_args *args) 622 { 623 struct msync_args bsd_args; 624 625 bsd_args.addr = (caddr_t)args->addr; 626 bsd_args.len = args->len; 627 bsd_args.flags = args->fl & ~LINUX_MS_SYNC; 628 629 return msync(td, &bsd_args); 630 } 631 632 #ifndef __alpha__ 633 int 634 linux_time(struct thread *td, struct linux_time_args *args) 635 { 636 struct timeval tv; 637 l_time_t tm; 638 int error; 639 640 #ifdef DEBUG 641 if (ldebug(time)) 642 printf(ARGS(time, "*")); 643 #endif 644 645 microtime(&tv); 646 tm = tv.tv_sec; 647 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm)))) 648 return error; 649 td->td_retval[0] = tm; 650 return 0; 651 } 652 #endif /*!__alpha__*/ 653 654 struct l_times_argv { 655 l_long tms_utime; 656 l_long tms_stime; 657 l_long tms_cutime; 658 l_long tms_cstime; 659 }; 660 661 #ifdef __alpha__ 662 #define CLK_TCK 1024 /* Linux uses 1024 on alpha */ 663 #else 664 #define CLK_TCK 100 /* Linux uses 100 */ 665 #endif 666 667 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 668 669 int 670 linux_times(struct thread *td, struct linux_times_args *args) 671 { 672 struct timeval tv; 673 struct l_times_argv tms; 674 struct rusage ru; 675 int error; 676 677 #ifdef DEBUG 678 if (ldebug(times)) 679 printf(ARGS(times, "*")); 680 #endif 681 682 mtx_lock_spin(&sched_lock); 683 calcru(td->td_proc, &ru.ru_utime, &ru.ru_stime, NULL); 684 mtx_unlock_spin(&sched_lock); 685 686 tms.tms_utime = CONVTCK(ru.ru_utime); 687 tms.tms_stime = CONVTCK(ru.ru_stime); 688 689 tms.tms_cutime = CONVTCK(td->td_proc->p_stats->p_cru.ru_utime); 690 tms.tms_cstime = CONVTCK(td->td_proc->p_stats->p_cru.ru_stime); 691 692 if ((error = copyout(&tms, args->buf, sizeof(tms)))) 693 return error; 694 695 microuptime(&tv); 696 td->td_retval[0] = (int)CONVTCK(tv); 697 return 0; 698 } 699 700 int 701 linux_newuname(struct thread *td, struct linux_newuname_args *args) 702 { 703 struct l_new_utsname utsname; 704 char osname[LINUX_MAX_UTSNAME]; 705 char osrelease[LINUX_MAX_UTSNAME]; 706 char *p; 707 708 #ifdef DEBUG 709 if (ldebug(newuname)) 710 printf(ARGS(newuname, "*")); 711 #endif 712 713 linux_get_osname(td, osname); 714 linux_get_osrelease(td, osrelease); 715 716 bzero(&utsname, sizeof(utsname)); 717 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME); 718 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME); 719 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME); 720 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME); 721 for (p = utsname.version; *p != '\0'; ++p) 722 if (*p == '\n') { 723 *p = '\0'; 724 break; 725 } 726 #ifdef __i386__ 727 { 728 const char *class; 729 switch (cpu_class) { 730 case CPUCLASS_686: 731 class = "i686"; 732 break; 733 case CPUCLASS_586: 734 class = "i586"; 735 break; 736 case CPUCLASS_486: 737 class = "i486"; 738 break; 739 default: 740 class = "i386"; 741 } 742 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME); 743 } 744 #else 745 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME); 746 #endif 747 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME); 748 749 return (copyout(&utsname, args->buf, sizeof(utsname))); 750 } 751 752 #if defined(__i386__) 753 struct l_utimbuf { 754 l_time_t l_actime; 755 l_time_t l_modtime; 756 }; 757 758 int 759 linux_utime(struct thread *td, struct linux_utime_args *args) 760 { 761 struct timeval tv[2], *tvp; 762 struct l_utimbuf lut; 763 char *fname; 764 int error; 765 766 LCONVPATHEXIST(td, args->fname, &fname); 767 768 #ifdef DEBUG 769 if (ldebug(utime)) 770 printf(ARGS(utime, "%s, *"), fname); 771 #endif 772 773 if (args->times) { 774 if ((error = copyin(args->times, &lut, sizeof lut))) { 775 LFREEPATH(fname); 776 return error; 777 } 778 tv[0].tv_sec = lut.l_actime; 779 tv[0].tv_usec = 0; 780 tv[1].tv_sec = lut.l_modtime; 781 tv[1].tv_usec = 0; 782 tvp = tv; 783 } else 784 tvp = NULL; 785 786 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE); 787 LFREEPATH(fname); 788 return (error); 789 } 790 #endif /* __i386__ */ 791 792 #define __WCLONE 0x80000000 793 794 #ifndef __alpha__ 795 int 796 linux_waitpid(struct thread *td, struct linux_waitpid_args *args) 797 { 798 int error, options, tmpstat; 799 800 #ifdef DEBUG 801 if (ldebug(waitpid)) 802 printf(ARGS(waitpid, "%d, %p, %d"), 803 args->pid, (void *)args->status, args->options); 804 #endif 805 806 options = (args->options & (WNOHANG | WUNTRACED)); 807 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 808 if (args->options & __WCLONE) 809 options |= WLINUXCLONE; 810 811 error = kern_wait(td, args->pid, &tmpstat, options, NULL); 812 if (error) 813 return error; 814 815 if (args->status) { 816 tmpstat &= 0xffff; 817 if (WIFSIGNALED(tmpstat)) 818 tmpstat = (tmpstat & 0xffffff80) | 819 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 820 else if (WIFSTOPPED(tmpstat)) 821 tmpstat = (tmpstat & 0xffff00ff) | 822 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 823 return copyout(&tmpstat, args->status, sizeof(int)); 824 } 825 826 return 0; 827 } 828 #endif /*!__alpha__*/ 829 830 int 831 linux_wait4(struct thread *td, struct linux_wait4_args *args) 832 { 833 int error, options, tmpstat; 834 struct rusage ru; 835 struct proc *p; 836 837 #ifdef DEBUG 838 if (ldebug(wait4)) 839 printf(ARGS(wait4, "%d, %p, %d, %p"), 840 args->pid, (void *)args->status, args->options, 841 (void *)args->rusage); 842 #endif 843 844 options = (args->options & (WNOHANG | WUNTRACED)); 845 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */ 846 if (args->options & __WCLONE) 847 options |= WLINUXCLONE; 848 849 error = kern_wait(td, args->pid, &tmpstat, options, &ru); 850 if (error) 851 return error; 852 853 p = td->td_proc; 854 PROC_LOCK(p); 855 SIGDELSET(p->p_siglist, SIGCHLD); 856 PROC_UNLOCK(p); 857 858 if (args->status) { 859 tmpstat &= 0xffff; 860 if (WIFSIGNALED(tmpstat)) 861 tmpstat = (tmpstat & 0xffffff80) | 862 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat)); 863 else if (WIFSTOPPED(tmpstat)) 864 tmpstat = (tmpstat & 0xffff00ff) | 865 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8); 866 error = copyout(&tmpstat, args->status, sizeof(int)); 867 } 868 if (args->rusage != NULL && error == 0) 869 error = copyout(&ru, args->rusage, sizeof(ru)); 870 871 return (error); 872 } 873 874 int 875 linux_mknod(struct thread *td, struct linux_mknod_args *args) 876 { 877 char *path; 878 int error; 879 880 LCONVPATHCREAT(td, args->path, &path); 881 882 #ifdef DEBUG 883 if (ldebug(mknod)) 884 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev); 885 #endif 886 887 if (args->mode & S_IFIFO) 888 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode); 889 else 890 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode, 891 args->dev); 892 LFREEPATH(path); 893 return (error); 894 } 895 896 /* 897 * UGH! This is just about the dumbest idea I've ever heard!! 898 */ 899 int 900 linux_personality(struct thread *td, struct linux_personality_args *args) 901 { 902 #ifdef DEBUG 903 if (ldebug(personality)) 904 printf(ARGS(personality, "%lu"), (unsigned long)args->per); 905 #endif 906 #ifndef __alpha__ 907 if (args->per != 0) 908 return EINVAL; 909 #endif 910 911 /* Yes Jim, it's still a Linux... */ 912 td->td_retval[0] = 0; 913 return 0; 914 } 915 916 /* 917 * Wrappers for get/setitimer for debugging.. 918 */ 919 int 920 linux_setitimer(struct thread *td, struct linux_setitimer_args *args) 921 { 922 struct setitimer_args bsa; 923 struct itimerval foo; 924 int error; 925 926 #ifdef DEBUG 927 if (ldebug(setitimer)) 928 printf(ARGS(setitimer, "%p, %p"), 929 (void *)args->itv, (void *)args->oitv); 930 #endif 931 bsa.which = args->which; 932 bsa.itv = (struct itimerval *)args->itv; 933 bsa.oitv = (struct itimerval *)args->oitv; 934 if (args->itv) { 935 if ((error = copyin(args->itv, &foo, sizeof(foo)))) 936 return error; 937 #ifdef DEBUG 938 if (ldebug(setitimer)) { 939 printf("setitimer: value: sec: %ld, usec: %ld\n", 940 foo.it_value.tv_sec, foo.it_value.tv_usec); 941 printf("setitimer: interval: sec: %ld, usec: %ld\n", 942 foo.it_interval.tv_sec, foo.it_interval.tv_usec); 943 } 944 #endif 945 } 946 return setitimer(td, &bsa); 947 } 948 949 int 950 linux_getitimer(struct thread *td, struct linux_getitimer_args *args) 951 { 952 struct getitimer_args bsa; 953 #ifdef DEBUG 954 if (ldebug(getitimer)) 955 printf(ARGS(getitimer, "%p"), (void *)args->itv); 956 #endif 957 bsa.which = args->which; 958 bsa.itv = (struct itimerval *)args->itv; 959 return getitimer(td, &bsa); 960 } 961 962 #ifndef __alpha__ 963 int 964 linux_nice(struct thread *td, struct linux_nice_args *args) 965 { 966 struct setpriority_args bsd_args; 967 968 bsd_args.which = PRIO_PROCESS; 969 bsd_args.who = 0; /* current process */ 970 bsd_args.prio = args->inc; 971 return setpriority(td, &bsd_args); 972 } 973 #endif /*!__alpha__*/ 974 975 int 976 linux_setgroups(struct thread *td, struct linux_setgroups_args *args) 977 { 978 struct ucred *newcred, *oldcred; 979 l_gid_t linux_gidset[NGROUPS]; 980 gid_t *bsd_gidset; 981 int ngrp, error; 982 struct proc *p; 983 984 ngrp = args->gidsetsize; 985 if (ngrp < 0 || ngrp >= NGROUPS) 986 return (EINVAL); 987 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t)); 988 if (error) 989 return (error); 990 newcred = crget(); 991 p = td->td_proc; 992 PROC_LOCK(p); 993 oldcred = p->p_ucred; 994 995 /* 996 * cr_groups[0] holds egid. Setting the whole set from 997 * the supplied set will cause egid to be changed too. 998 * Keep cr_groups[0] unchanged to prevent that. 999 */ 1000 1001 if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0) { 1002 PROC_UNLOCK(p); 1003 crfree(newcred); 1004 return (error); 1005 } 1006 1007 crcopy(newcred, oldcred); 1008 if (ngrp > 0) { 1009 newcred->cr_ngroups = ngrp + 1; 1010 1011 bsd_gidset = newcred->cr_groups; 1012 ngrp--; 1013 while (ngrp >= 0) { 1014 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 1015 ngrp--; 1016 } 1017 } 1018 else 1019 newcred->cr_ngroups = 1; 1020 1021 setsugid(p); 1022 p->p_ucred = newcred; 1023 PROC_UNLOCK(p); 1024 crfree(oldcred); 1025 return (0); 1026 } 1027 1028 int 1029 linux_getgroups(struct thread *td, struct linux_getgroups_args *args) 1030 { 1031 struct ucred *cred; 1032 l_gid_t linux_gidset[NGROUPS]; 1033 gid_t *bsd_gidset; 1034 int bsd_gidsetsz, ngrp, error; 1035 1036 cred = td->td_ucred; 1037 bsd_gidset = cred->cr_groups; 1038 bsd_gidsetsz = cred->cr_ngroups - 1; 1039 1040 /* 1041 * cr_groups[0] holds egid. Returning the whole set 1042 * here will cause a duplicate. Exclude cr_groups[0] 1043 * to prevent that. 1044 */ 1045 1046 if ((ngrp = args->gidsetsize) == 0) { 1047 td->td_retval[0] = bsd_gidsetsz; 1048 return (0); 1049 } 1050 1051 if (ngrp < bsd_gidsetsz) 1052 return (EINVAL); 1053 1054 ngrp = 0; 1055 while (ngrp < bsd_gidsetsz) { 1056 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 1057 ngrp++; 1058 } 1059 1060 if ((error = copyout(linux_gidset, args->grouplist, 1061 ngrp * sizeof(l_gid_t)))) 1062 return (error); 1063 1064 td->td_retval[0] = ngrp; 1065 return (0); 1066 } 1067 1068 #ifndef __alpha__ 1069 int 1070 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args) 1071 { 1072 struct rlimit bsd_rlim; 1073 struct l_rlimit rlim; 1074 u_int which; 1075 int error; 1076 1077 #ifdef DEBUG 1078 if (ldebug(setrlimit)) 1079 printf(ARGS(setrlimit, "%d, %p"), 1080 args->resource, (void *)args->rlim); 1081 #endif 1082 1083 if (args->resource >= LINUX_RLIM_NLIMITS) 1084 return (EINVAL); 1085 1086 which = linux_to_bsd_resource[args->resource]; 1087 if (which == -1) 1088 return (EINVAL); 1089 1090 error = copyin(args->rlim, &rlim, sizeof(rlim)); 1091 if (error) 1092 return (error); 1093 1094 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur; 1095 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max; 1096 return (kern_setrlimit(td, which, &bsd_rlim)); 1097 } 1098 1099 int 1100 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args) 1101 { 1102 struct l_rlimit rlim; 1103 struct proc *p = td->td_proc; 1104 struct rlimit bsd_rlim; 1105 u_int which; 1106 1107 #ifdef DEBUG 1108 if (ldebug(old_getrlimit)) 1109 printf(ARGS(old_getrlimit, "%d, %p"), 1110 args->resource, (void *)args->rlim); 1111 #endif 1112 1113 if (args->resource >= LINUX_RLIM_NLIMITS) 1114 return (EINVAL); 1115 1116 which = linux_to_bsd_resource[args->resource]; 1117 if (which == -1) 1118 return (EINVAL); 1119 1120 PROC_LOCK(p); 1121 lim_rlimit(p, which, &bsd_rlim); 1122 PROC_UNLOCK(p); 1123 1124 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur; 1125 if (rlim.rlim_cur == ULONG_MAX) 1126 rlim.rlim_cur = LONG_MAX; 1127 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max; 1128 if (rlim.rlim_max == ULONG_MAX) 1129 rlim.rlim_max = LONG_MAX; 1130 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1131 } 1132 1133 int 1134 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args) 1135 { 1136 struct l_rlimit rlim; 1137 struct proc *p = td->td_proc; 1138 struct rlimit bsd_rlim; 1139 u_int which; 1140 1141 #ifdef DEBUG 1142 if (ldebug(getrlimit)) 1143 printf(ARGS(getrlimit, "%d, %p"), 1144 args->resource, (void *)args->rlim); 1145 #endif 1146 1147 if (args->resource >= LINUX_RLIM_NLIMITS) 1148 return (EINVAL); 1149 1150 which = linux_to_bsd_resource[args->resource]; 1151 if (which == -1) 1152 return (EINVAL); 1153 1154 PROC_LOCK(p); 1155 lim_rlimit(p, which, &bsd_rlim); 1156 PROC_UNLOCK(p); 1157 1158 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur; 1159 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max; 1160 return (copyout(&rlim, args->rlim, sizeof(rlim))); 1161 } 1162 #endif /*!__alpha__*/ 1163 1164 int 1165 linux_sched_setscheduler(struct thread *td, 1166 struct linux_sched_setscheduler_args *args) 1167 { 1168 struct sched_setscheduler_args bsd; 1169 1170 #ifdef DEBUG 1171 if (ldebug(sched_setscheduler)) 1172 printf(ARGS(sched_setscheduler, "%d, %d, %p"), 1173 args->pid, args->policy, (const void *)args->param); 1174 #endif 1175 1176 switch (args->policy) { 1177 case LINUX_SCHED_OTHER: 1178 bsd.policy = SCHED_OTHER; 1179 break; 1180 case LINUX_SCHED_FIFO: 1181 bsd.policy = SCHED_FIFO; 1182 break; 1183 case LINUX_SCHED_RR: 1184 bsd.policy = SCHED_RR; 1185 break; 1186 default: 1187 return EINVAL; 1188 } 1189 1190 bsd.pid = args->pid; 1191 bsd.param = (struct sched_param *)args->param; 1192 return sched_setscheduler(td, &bsd); 1193 } 1194 1195 int 1196 linux_sched_getscheduler(struct thread *td, 1197 struct linux_sched_getscheduler_args *args) 1198 { 1199 struct sched_getscheduler_args bsd; 1200 int error; 1201 1202 #ifdef DEBUG 1203 if (ldebug(sched_getscheduler)) 1204 printf(ARGS(sched_getscheduler, "%d"), args->pid); 1205 #endif 1206 1207 bsd.pid = args->pid; 1208 error = sched_getscheduler(td, &bsd); 1209 1210 switch (td->td_retval[0]) { 1211 case SCHED_OTHER: 1212 td->td_retval[0] = LINUX_SCHED_OTHER; 1213 break; 1214 case SCHED_FIFO: 1215 td->td_retval[0] = LINUX_SCHED_FIFO; 1216 break; 1217 case SCHED_RR: 1218 td->td_retval[0] = LINUX_SCHED_RR; 1219 break; 1220 } 1221 1222 return error; 1223 } 1224 1225 int 1226 linux_sched_get_priority_max(struct thread *td, 1227 struct linux_sched_get_priority_max_args *args) 1228 { 1229 struct sched_get_priority_max_args bsd; 1230 1231 #ifdef DEBUG 1232 if (ldebug(sched_get_priority_max)) 1233 printf(ARGS(sched_get_priority_max, "%d"), args->policy); 1234 #endif 1235 1236 switch (args->policy) { 1237 case LINUX_SCHED_OTHER: 1238 bsd.policy = SCHED_OTHER; 1239 break; 1240 case LINUX_SCHED_FIFO: 1241 bsd.policy = SCHED_FIFO; 1242 break; 1243 case LINUX_SCHED_RR: 1244 bsd.policy = SCHED_RR; 1245 break; 1246 default: 1247 return EINVAL; 1248 } 1249 return sched_get_priority_max(td, &bsd); 1250 } 1251 1252 int 1253 linux_sched_get_priority_min(struct thread *td, 1254 struct linux_sched_get_priority_min_args *args) 1255 { 1256 struct sched_get_priority_min_args bsd; 1257 1258 #ifdef DEBUG 1259 if (ldebug(sched_get_priority_min)) 1260 printf(ARGS(sched_get_priority_min, "%d"), args->policy); 1261 #endif 1262 1263 switch (args->policy) { 1264 case LINUX_SCHED_OTHER: 1265 bsd.policy = SCHED_OTHER; 1266 break; 1267 case LINUX_SCHED_FIFO: 1268 bsd.policy = SCHED_FIFO; 1269 break; 1270 case LINUX_SCHED_RR: 1271 bsd.policy = SCHED_RR; 1272 break; 1273 default: 1274 return EINVAL; 1275 } 1276 return sched_get_priority_min(td, &bsd); 1277 } 1278 1279 #define REBOOT_CAD_ON 0x89abcdef 1280 #define REBOOT_CAD_OFF 0 1281 #define REBOOT_HALT 0xcdef0123 1282 1283 int 1284 linux_reboot(struct thread *td, struct linux_reboot_args *args) 1285 { 1286 struct reboot_args bsd_args; 1287 1288 #ifdef DEBUG 1289 if (ldebug(reboot)) 1290 printf(ARGS(reboot, "0x%x"), args->cmd); 1291 #endif 1292 if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF) 1293 return (0); 1294 bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0; 1295 return (reboot(td, &bsd_args)); 1296 } 1297 1298 #ifndef __alpha__ 1299 1300 /* 1301 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify 1302 * td->td_retval[1] when COMPAT_43 is defined. This 1303 * globbers registers that are assumed to be preserved. The following 1304 * lightweight syscalls fixes this. See also linux_getgid16() and 1305 * linux_getuid16() in linux_uid16.c. 1306 * 1307 * linux_getpid() - MP SAFE 1308 * linux_getgid() - MP SAFE 1309 * linux_getuid() - MP SAFE 1310 */ 1311 1312 int 1313 linux_getpid(struct thread *td, struct linux_getpid_args *args) 1314 { 1315 1316 td->td_retval[0] = td->td_proc->p_pid; 1317 return (0); 1318 } 1319 1320 int 1321 linux_getgid(struct thread *td, struct linux_getgid_args *args) 1322 { 1323 1324 td->td_retval[0] = td->td_ucred->cr_rgid; 1325 return (0); 1326 } 1327 1328 int 1329 linux_getuid(struct thread *td, struct linux_getuid_args *args) 1330 { 1331 1332 td->td_retval[0] = td->td_ucred->cr_ruid; 1333 return (0); 1334 } 1335 1336 #endif /*!__alpha__*/ 1337 1338 int 1339 linux_getsid(struct thread *td, struct linux_getsid_args *args) 1340 { 1341 struct getsid_args bsd; 1342 bsd.pid = args->pid; 1343 return getsid(td, &bsd); 1344 } 1345