1 /* 2 * linux/arch/alpha/kernel/osf_sys.c 3 * 4 * Copyright (C) 1995 Linus Torvalds 5 */ 6 7 /* 8 * This file handles some of the stranger OSF/1 system call interfaces. 9 * Some of the system calls expect a non-C calling standard, others have 10 * special parameter blocks.. 11 */ 12 13 #include <linux/errno.h> 14 #include <linux/sched.h> 15 #include <linux/kernel.h> 16 #include <linux/mm.h> 17 #include <linux/smp.h> 18 #include <linux/stddef.h> 19 #include <linux/syscalls.h> 20 #include <linux/unistd.h> 21 #include <linux/ptrace.h> 22 #include <linux/user.h> 23 #include <linux/utsname.h> 24 #include <linux/time.h> 25 #include <linux/timex.h> 26 #include <linux/major.h> 27 #include <linux/stat.h> 28 #include <linux/mman.h> 29 #include <linux/shm.h> 30 #include <linux/poll.h> 31 #include <linux/file.h> 32 #include <linux/types.h> 33 #include <linux/ipc.h> 34 #include <linux/namei.h> 35 #include <linux/uio.h> 36 #include <linux/vfs.h> 37 #include <linux/rcupdate.h> 38 #include <linux/slab.h> 39 40 #include <asm/fpu.h> 41 #include <asm/io.h> 42 #include <asm/uaccess.h> 43 #include <asm/system.h> 44 #include <asm/sysinfo.h> 45 #include <asm/thread_info.h> 46 #include <asm/hwrpb.h> 47 #include <asm/processor.h> 48 49 /* 50 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 51 * which OSF programs just shouldn't be doing. We're still not quite 52 * identical to OSF as we don't return 0 on success, but doing otherwise 53 * would require changes to libc. Hopefully this is good enough. 54 */ 55 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 56 { 57 unsigned long retval = sys_brk(brk); 58 if (brk && brk != retval) 59 retval = -ENOMEM; 60 return retval; 61 } 62 63 /* 64 * This is pure guess-work.. 65 */ 66 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 67 unsigned long, text_len, unsigned long, bss_start, 68 unsigned long, bss_len) 69 { 70 struct mm_struct *mm; 71 72 mm = current->mm; 73 mm->end_code = bss_start + bss_len; 74 mm->start_brk = bss_start + bss_len; 75 mm->brk = bss_start + bss_len; 76 #if 0 77 printk("set_program_attributes(%lx %lx %lx %lx)\n", 78 text_start, text_len, bss_start, bss_len); 79 #endif 80 return 0; 81 } 82 83 /* 84 * OSF/1 directory handling functions... 85 * 86 * The "getdents()" interface is much more sane: the "basep" stuff is 87 * braindamage (it can't really handle filesystems where the directory 88 * offset differences aren't the same as "d_reclen"). 89 */ 90 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 91 92 struct osf_dirent { 93 unsigned int d_ino; 94 unsigned short d_reclen; 95 unsigned short d_namlen; 96 char d_name[1]; 97 }; 98 99 struct osf_dirent_callback { 100 struct osf_dirent __user *dirent; 101 long __user *basep; 102 unsigned int count; 103 int error; 104 }; 105 106 static int 107 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 108 u64 ino, unsigned int d_type) 109 { 110 struct osf_dirent __user *dirent; 111 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 112 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 113 unsigned int d_ino; 114 115 buf->error = -EINVAL; /* only used if we fail */ 116 if (reclen > buf->count) 117 return -EINVAL; 118 d_ino = ino; 119 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 120 buf->error = -EOVERFLOW; 121 return -EOVERFLOW; 122 } 123 if (buf->basep) { 124 if (put_user(offset, buf->basep)) 125 goto Efault; 126 buf->basep = NULL; 127 } 128 dirent = buf->dirent; 129 if (put_user(d_ino, &dirent->d_ino) || 130 put_user(namlen, &dirent->d_namlen) || 131 put_user(reclen, &dirent->d_reclen) || 132 copy_to_user(dirent->d_name, name, namlen) || 133 put_user(0, dirent->d_name + namlen)) 134 goto Efault; 135 dirent = (void __user *)dirent + reclen; 136 buf->dirent = dirent; 137 buf->count -= reclen; 138 return 0; 139 Efault: 140 buf->error = -EFAULT; 141 return -EFAULT; 142 } 143 144 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 145 struct osf_dirent __user *, dirent, unsigned int, count, 146 long __user *, basep) 147 { 148 int error; 149 struct file *file; 150 struct osf_dirent_callback buf; 151 152 error = -EBADF; 153 file = fget(fd); 154 if (!file) 155 goto out; 156 157 buf.dirent = dirent; 158 buf.basep = basep; 159 buf.count = count; 160 buf.error = 0; 161 162 error = vfs_readdir(file, osf_filldir, &buf); 163 if (error >= 0) 164 error = buf.error; 165 if (count != buf.count) 166 error = count - buf.count; 167 168 fput(file); 169 out: 170 return error; 171 } 172 173 #undef NAME_OFFSET 174 175 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 176 unsigned long, prot, unsigned long, flags, unsigned long, fd, 177 unsigned long, off) 178 { 179 unsigned long ret = -EINVAL; 180 181 #if 0 182 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 183 printk("%s: unimplemented OSF mmap flags %04lx\n", 184 current->comm, flags); 185 #endif 186 if ((off + PAGE_ALIGN(len)) < off) 187 goto out; 188 if (off & ~PAGE_MASK) 189 goto out; 190 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 191 out: 192 return ret; 193 } 194 195 196 /* 197 * The OSF/1 statfs structure is much larger, but this should 198 * match the beginning, at least. 199 */ 200 struct osf_statfs { 201 short f_type; 202 short f_flags; 203 int f_fsize; 204 int f_bsize; 205 int f_blocks; 206 int f_bfree; 207 int f_bavail; 208 int f_files; 209 int f_ffree; 210 __kernel_fsid_t f_fsid; 211 }; 212 213 static int 214 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 215 unsigned long bufsiz) 216 { 217 struct osf_statfs tmp_stat; 218 219 tmp_stat.f_type = linux_stat->f_type; 220 tmp_stat.f_flags = 0; /* mount flags */ 221 tmp_stat.f_fsize = linux_stat->f_frsize; 222 tmp_stat.f_bsize = linux_stat->f_bsize; 223 tmp_stat.f_blocks = linux_stat->f_blocks; 224 tmp_stat.f_bfree = linux_stat->f_bfree; 225 tmp_stat.f_bavail = linux_stat->f_bavail; 226 tmp_stat.f_files = linux_stat->f_files; 227 tmp_stat.f_ffree = linux_stat->f_ffree; 228 tmp_stat.f_fsid = linux_stat->f_fsid; 229 if (bufsiz > sizeof(tmp_stat)) 230 bufsiz = sizeof(tmp_stat); 231 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 232 } 233 234 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 235 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 236 { 237 struct kstatfs linux_stat; 238 int error = user_statfs(pathname, &linux_stat); 239 if (!error) 240 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 241 return error; 242 } 243 244 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 245 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 246 { 247 struct kstatfs linux_stat; 248 int error = fd_statfs(fd, &linux_stat); 249 if (!error) 250 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 251 return error; 252 } 253 254 /* 255 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 256 * 257 * Although to be frank, neither are the native Linux/i386 ones.. 258 */ 259 struct ufs_args { 260 char __user *devname; 261 int flags; 262 uid_t exroot; 263 }; 264 265 struct cdfs_args { 266 char __user *devname; 267 int flags; 268 uid_t exroot; 269 270 /* This has lots more here, which Linux handles with the option block 271 but I'm too lazy to do the translation into ASCII. */ 272 }; 273 274 struct procfs_args { 275 char __user *devname; 276 int flags; 277 uid_t exroot; 278 }; 279 280 /* 281 * We can't actually handle ufs yet, so we translate UFS mounts to 282 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 283 * layout is so braindead it's a major headache doing it. 284 * 285 * Just how long ago was it written? OTOH our UFS driver may be still 286 * unhappy with OSF UFS. [CHECKME] 287 */ 288 static int 289 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 290 { 291 int retval; 292 struct cdfs_args tmp; 293 char *devname; 294 295 retval = -EFAULT; 296 if (copy_from_user(&tmp, args, sizeof(tmp))) 297 goto out; 298 devname = getname(tmp.devname); 299 retval = PTR_ERR(devname); 300 if (IS_ERR(devname)) 301 goto out; 302 retval = do_mount(devname, dirname, "ext2", flags, NULL); 303 putname(devname); 304 out: 305 return retval; 306 } 307 308 static int 309 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 310 { 311 int retval; 312 struct cdfs_args tmp; 313 char *devname; 314 315 retval = -EFAULT; 316 if (copy_from_user(&tmp, args, sizeof(tmp))) 317 goto out; 318 devname = getname(tmp.devname); 319 retval = PTR_ERR(devname); 320 if (IS_ERR(devname)) 321 goto out; 322 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 323 putname(devname); 324 out: 325 return retval; 326 } 327 328 static int 329 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 330 { 331 struct procfs_args tmp; 332 333 if (copy_from_user(&tmp, args, sizeof(tmp))) 334 return -EFAULT; 335 336 return do_mount("", dirname, "proc", flags, NULL); 337 } 338 339 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 340 int, flag, void __user *, data) 341 { 342 int retval; 343 char *name; 344 345 name = getname(path); 346 retval = PTR_ERR(name); 347 if (IS_ERR(name)) 348 goto out; 349 switch (typenr) { 350 case 1: 351 retval = osf_ufs_mount(name, data, flag); 352 break; 353 case 6: 354 retval = osf_cdfs_mount(name, data, flag); 355 break; 356 case 9: 357 retval = osf_procfs_mount(name, data, flag); 358 break; 359 default: 360 retval = -EINVAL; 361 printk("osf_mount(%ld, %x)\n", typenr, flag); 362 } 363 putname(name); 364 out: 365 return retval; 366 } 367 368 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 369 { 370 int error; 371 372 down_read(&uts_sem); 373 error = -EFAULT; 374 if (copy_to_user(name + 0, utsname()->sysname, 32)) 375 goto out; 376 if (copy_to_user(name + 32, utsname()->nodename, 32)) 377 goto out; 378 if (copy_to_user(name + 64, utsname()->release, 32)) 379 goto out; 380 if (copy_to_user(name + 96, utsname()->version, 32)) 381 goto out; 382 if (copy_to_user(name + 128, utsname()->machine, 32)) 383 goto out; 384 385 error = 0; 386 out: 387 up_read(&uts_sem); 388 return error; 389 } 390 391 SYSCALL_DEFINE0(getpagesize) 392 { 393 return PAGE_SIZE; 394 } 395 396 SYSCALL_DEFINE0(getdtablesize) 397 { 398 return sysctl_nr_open; 399 } 400 401 /* 402 * For compatibility with OSF/1 only. Use utsname(2) instead. 403 */ 404 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 405 { 406 unsigned len; 407 int i; 408 409 if (!access_ok(VERIFY_WRITE, name, namelen)) 410 return -EFAULT; 411 412 len = namelen; 413 if (len > 32) 414 len = 32; 415 416 down_read(&uts_sem); 417 for (i = 0; i < len; ++i) { 418 __put_user(utsname()->domainname[i], name + i); 419 if (utsname()->domainname[i] == '\0') 420 break; 421 } 422 up_read(&uts_sem); 423 424 return 0; 425 } 426 427 /* 428 * The following stuff should move into a header file should it ever 429 * be labeled "officially supported." Right now, there is just enough 430 * support to avoid applications (such as tar) printing error 431 * messages. The attributes are not really implemented. 432 */ 433 434 /* 435 * Values for Property list entry flag 436 */ 437 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 438 by default */ 439 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 440 #define PLE_FLAG_ALL -1 /* All flag value */ 441 442 struct proplistname_args { 443 unsigned int pl_mask; 444 unsigned int pl_numnames; 445 char **pl_names; 446 }; 447 448 union pl_args { 449 struct setargs { 450 char __user *path; 451 long follow; 452 long nbytes; 453 char __user *buf; 454 } set; 455 struct fsetargs { 456 long fd; 457 long nbytes; 458 char __user *buf; 459 } fset; 460 struct getargs { 461 char __user *path; 462 long follow; 463 struct proplistname_args __user *name_args; 464 long nbytes; 465 char __user *buf; 466 int __user *min_buf_size; 467 } get; 468 struct fgetargs { 469 long fd; 470 struct proplistname_args __user *name_args; 471 long nbytes; 472 char __user *buf; 473 int __user *min_buf_size; 474 } fget; 475 struct delargs { 476 char __user *path; 477 long follow; 478 struct proplistname_args __user *name_args; 479 } del; 480 struct fdelargs { 481 long fd; 482 struct proplistname_args __user *name_args; 483 } fdel; 484 }; 485 486 enum pl_code { 487 PL_SET = 1, PL_FSET = 2, 488 PL_GET = 3, PL_FGET = 4, 489 PL_DEL = 5, PL_FDEL = 6 490 }; 491 492 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 493 union pl_args __user *, args) 494 { 495 long error; 496 int __user *min_buf_size_ptr; 497 498 switch (code) { 499 case PL_SET: 500 if (get_user(error, &args->set.nbytes)) 501 error = -EFAULT; 502 break; 503 case PL_FSET: 504 if (get_user(error, &args->fset.nbytes)) 505 error = -EFAULT; 506 break; 507 case PL_GET: 508 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 509 if (error) 510 break; 511 error = put_user(0, min_buf_size_ptr); 512 break; 513 case PL_FGET: 514 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 515 if (error) 516 break; 517 error = put_user(0, min_buf_size_ptr); 518 break; 519 case PL_DEL: 520 case PL_FDEL: 521 error = 0; 522 break; 523 default: 524 error = -EOPNOTSUPP; 525 break; 526 }; 527 return error; 528 } 529 530 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 531 struct sigstack __user *, uoss) 532 { 533 unsigned long usp = rdusp(); 534 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 535 unsigned long oss_os = on_sig_stack(usp); 536 int error; 537 538 if (uss) { 539 void __user *ss_sp; 540 541 error = -EFAULT; 542 if (get_user(ss_sp, &uss->ss_sp)) 543 goto out; 544 545 /* If the current stack was set with sigaltstack, don't 546 swap stacks while we are on it. */ 547 error = -EPERM; 548 if (current->sas_ss_sp && on_sig_stack(usp)) 549 goto out; 550 551 /* Since we don't know the extent of the stack, and we don't 552 track onstack-ness, but rather calculate it, we must 553 presume a size. Ho hum this interface is lossy. */ 554 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 555 current->sas_ss_size = SIGSTKSZ; 556 } 557 558 if (uoss) { 559 error = -EFAULT; 560 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 561 || __put_user(oss_sp, &uoss->ss_sp) 562 || __put_user(oss_os, &uoss->ss_onstack)) 563 goto out; 564 } 565 566 error = 0; 567 out: 568 return error; 569 } 570 571 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 572 { 573 const char *sysinfo_table[] = { 574 utsname()->sysname, 575 utsname()->nodename, 576 utsname()->release, 577 utsname()->version, 578 utsname()->machine, 579 "alpha", /* instruction set architecture */ 580 "dummy", /* hardware serial number */ 581 "dummy", /* hardware manufacturer */ 582 "dummy", /* secure RPC domain */ 583 }; 584 unsigned long offset; 585 const char *res; 586 long len, err = -EINVAL; 587 588 offset = command-1; 589 if (offset >= ARRAY_SIZE(sysinfo_table)) { 590 /* Digital UNIX has a few unpublished interfaces here */ 591 printk("sysinfo(%d)", command); 592 goto out; 593 } 594 595 down_read(&uts_sem); 596 res = sysinfo_table[offset]; 597 len = strlen(res)+1; 598 if ((unsigned long)len > (unsigned long)count) 599 len = count; 600 if (copy_to_user(buf, res, len)) 601 err = -EFAULT; 602 else 603 err = 0; 604 up_read(&uts_sem); 605 out: 606 return err; 607 } 608 609 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 610 unsigned long, nbytes, int __user *, start, void __user *, arg) 611 { 612 unsigned long w; 613 struct percpu_struct *cpu; 614 615 switch (op) { 616 case GSI_IEEE_FP_CONTROL: 617 /* Return current software fp control & status bits. */ 618 /* Note that DU doesn't verify available space here. */ 619 620 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 621 w = swcr_update_status(w, rdfpcr()); 622 if (put_user(w, (unsigned long __user *) buffer)) 623 return -EFAULT; 624 return 0; 625 626 case GSI_IEEE_STATE_AT_SIGNAL: 627 /* 628 * Not sure anybody will ever use this weird stuff. These 629 * ops can be used (under OSF/1) to set the fpcr that should 630 * be used when a signal handler starts executing. 631 */ 632 break; 633 634 case GSI_UACPROC: 635 if (nbytes < sizeof(unsigned int)) 636 return -EINVAL; 637 w = (current_thread_info()->flags >> ALPHA_UAC_SHIFT) & 638 UAC_BITMASK; 639 if (put_user(w, (unsigned int __user *)buffer)) 640 return -EFAULT; 641 return 1; 642 643 case GSI_PROC_TYPE: 644 if (nbytes < sizeof(unsigned long)) 645 return -EINVAL; 646 cpu = (struct percpu_struct*) 647 ((char*)hwrpb + hwrpb->processor_offset); 648 w = cpu->type; 649 if (put_user(w, (unsigned long __user*)buffer)) 650 return -EFAULT; 651 return 1; 652 653 case GSI_GET_HWRPB: 654 if (nbytes > sizeof(*hwrpb)) 655 return -EINVAL; 656 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 657 return -EFAULT; 658 return 1; 659 660 default: 661 break; 662 } 663 664 return -EOPNOTSUPP; 665 } 666 667 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 668 unsigned long, nbytes, int __user *, start, void __user *, arg) 669 { 670 switch (op) { 671 case SSI_IEEE_FP_CONTROL: { 672 unsigned long swcr, fpcr; 673 unsigned int *state; 674 675 /* 676 * Alpha Architecture Handbook 4.7.7.3: 677 * To be fully IEEE compiant, we must track the current IEEE 678 * exception state in software, because spurious bits can be 679 * set in the trap shadow of a software-complete insn. 680 */ 681 682 if (get_user(swcr, (unsigned long __user *)buffer)) 683 return -EFAULT; 684 state = ¤t_thread_info()->ieee_state; 685 686 /* Update softare trap enable bits. */ 687 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 688 689 /* Update the real fpcr. */ 690 fpcr = rdfpcr() & FPCR_DYN_MASK; 691 fpcr |= ieee_swcr_to_fpcr(swcr); 692 wrfpcr(fpcr); 693 694 return 0; 695 } 696 697 case SSI_IEEE_RAISE_EXCEPTION: { 698 unsigned long exc, swcr, fpcr, fex; 699 unsigned int *state; 700 701 if (get_user(exc, (unsigned long __user *)buffer)) 702 return -EFAULT; 703 state = ¤t_thread_info()->ieee_state; 704 exc &= IEEE_STATUS_MASK; 705 706 /* Update softare trap enable bits. */ 707 swcr = (*state & IEEE_SW_MASK) | exc; 708 *state |= exc; 709 710 /* Update the real fpcr. */ 711 fpcr = rdfpcr(); 712 fpcr |= ieee_swcr_to_fpcr(swcr); 713 wrfpcr(fpcr); 714 715 /* If any exceptions set by this call, and are unmasked, 716 send a signal. Old exceptions are not signaled. */ 717 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 718 if (fex) { 719 siginfo_t info; 720 int si_code = 0; 721 722 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 723 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 724 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 725 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 726 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 727 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 728 729 info.si_signo = SIGFPE; 730 info.si_errno = 0; 731 info.si_code = si_code; 732 info.si_addr = NULL; /* FIXME */ 733 send_sig_info(SIGFPE, &info, current); 734 } 735 return 0; 736 } 737 738 case SSI_IEEE_STATE_AT_SIGNAL: 739 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 740 /* 741 * Not sure anybody will ever use this weird stuff. These 742 * ops can be used (under OSF/1) to set the fpcr that should 743 * be used when a signal handler starts executing. 744 */ 745 break; 746 747 case SSI_NVPAIRS: { 748 unsigned long v, w, i; 749 unsigned int old, new; 750 751 for (i = 0; i < nbytes; ++i) { 752 753 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 754 return -EFAULT; 755 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 756 return -EFAULT; 757 switch (v) { 758 case SSIN_UACPROC: 759 again: 760 old = current_thread_info()->flags; 761 new = old & ~(UAC_BITMASK << ALPHA_UAC_SHIFT); 762 new = new | (w & UAC_BITMASK) << ALPHA_UAC_SHIFT; 763 if (cmpxchg(¤t_thread_info()->flags, 764 old, new) != old) 765 goto again; 766 break; 767 768 default: 769 return -EOPNOTSUPP; 770 } 771 } 772 return 0; 773 } 774 775 default: 776 break; 777 } 778 779 return -EOPNOTSUPP; 780 } 781 782 /* Translations due to the fact that OSF's time_t is an int. Which 783 affects all sorts of things, like timeval and itimerval. */ 784 785 extern struct timezone sys_tz; 786 787 struct timeval32 788 { 789 int tv_sec, tv_usec; 790 }; 791 792 struct itimerval32 793 { 794 struct timeval32 it_interval; 795 struct timeval32 it_value; 796 }; 797 798 static inline long 799 get_tv32(struct timeval *o, struct timeval32 __user *i) 800 { 801 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 802 (__get_user(o->tv_sec, &i->tv_sec) | 803 __get_user(o->tv_usec, &i->tv_usec))); 804 } 805 806 static inline long 807 put_tv32(struct timeval32 __user *o, struct timeval *i) 808 { 809 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 810 (__put_user(i->tv_sec, &o->tv_sec) | 811 __put_user(i->tv_usec, &o->tv_usec))); 812 } 813 814 static inline long 815 get_it32(struct itimerval *o, struct itimerval32 __user *i) 816 { 817 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 818 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 819 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 820 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 821 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 822 } 823 824 static inline long 825 put_it32(struct itimerval32 __user *o, struct itimerval *i) 826 { 827 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 828 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 829 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 830 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 831 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 832 } 833 834 static inline void 835 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 836 { 837 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 838 value->tv_sec = jiffies / HZ; 839 } 840 841 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 842 struct timezone __user *, tz) 843 { 844 if (tv) { 845 struct timeval ktv; 846 do_gettimeofday(&ktv); 847 if (put_tv32(tv, &ktv)) 848 return -EFAULT; 849 } 850 if (tz) { 851 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 852 return -EFAULT; 853 } 854 return 0; 855 } 856 857 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 858 struct timezone __user *, tz) 859 { 860 struct timespec kts; 861 struct timezone ktz; 862 863 if (tv) { 864 if (get_tv32((struct timeval *)&kts, tv)) 865 return -EFAULT; 866 } 867 if (tz) { 868 if (copy_from_user(&ktz, tz, sizeof(*tz))) 869 return -EFAULT; 870 } 871 872 kts.tv_nsec *= 1000; 873 874 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 875 } 876 877 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 878 { 879 struct itimerval kit; 880 int error; 881 882 error = do_getitimer(which, &kit); 883 if (!error && put_it32(it, &kit)) 884 error = -EFAULT; 885 886 return error; 887 } 888 889 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 890 struct itimerval32 __user *, out) 891 { 892 struct itimerval kin, kout; 893 int error; 894 895 if (in) { 896 if (get_it32(&kin, in)) 897 return -EFAULT; 898 } else 899 memset(&kin, 0, sizeof(kin)); 900 901 error = do_setitimer(which, &kin, out ? &kout : NULL); 902 if (error || !out) 903 return error; 904 905 if (put_it32(out, &kout)) 906 return -EFAULT; 907 908 return 0; 909 910 } 911 912 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 913 struct timeval32 __user *, tvs) 914 { 915 struct timespec tv[2]; 916 917 if (tvs) { 918 struct timeval ktvs[2]; 919 if (get_tv32(&ktvs[0], &tvs[0]) || 920 get_tv32(&ktvs[1], &tvs[1])) 921 return -EFAULT; 922 923 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 924 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 925 return -EINVAL; 926 927 tv[0].tv_sec = ktvs[0].tv_sec; 928 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 929 tv[1].tv_sec = ktvs[1].tv_sec; 930 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 931 } 932 933 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 934 } 935 936 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 937 fd_set __user *, exp, struct timeval32 __user *, tvp) 938 { 939 struct timespec end_time, *to = NULL; 940 if (tvp) { 941 time_t sec, usec; 942 943 to = &end_time; 944 945 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 946 || __get_user(sec, &tvp->tv_sec) 947 || __get_user(usec, &tvp->tv_usec)) { 948 return -EFAULT; 949 } 950 951 if (sec < 0 || usec < 0) 952 return -EINVAL; 953 954 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 955 return -EINVAL; 956 957 } 958 959 /* OSF does not copy back the remaining time. */ 960 return core_sys_select(n, inp, outp, exp, to); 961 } 962 963 struct rusage32 { 964 struct timeval32 ru_utime; /* user time used */ 965 struct timeval32 ru_stime; /* system time used */ 966 long ru_maxrss; /* maximum resident set size */ 967 long ru_ixrss; /* integral shared memory size */ 968 long ru_idrss; /* integral unshared data size */ 969 long ru_isrss; /* integral unshared stack size */ 970 long ru_minflt; /* page reclaims */ 971 long ru_majflt; /* page faults */ 972 long ru_nswap; /* swaps */ 973 long ru_inblock; /* block input operations */ 974 long ru_oublock; /* block output operations */ 975 long ru_msgsnd; /* messages sent */ 976 long ru_msgrcv; /* messages received */ 977 long ru_nsignals; /* signals received */ 978 long ru_nvcsw; /* voluntary context switches */ 979 long ru_nivcsw; /* involuntary " */ 980 }; 981 982 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 983 { 984 struct rusage32 r; 985 986 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 987 return -EINVAL; 988 989 memset(&r, 0, sizeof(r)); 990 switch (who) { 991 case RUSAGE_SELF: 992 jiffies_to_timeval32(current->utime, &r.ru_utime); 993 jiffies_to_timeval32(current->stime, &r.ru_stime); 994 r.ru_minflt = current->min_flt; 995 r.ru_majflt = current->maj_flt; 996 break; 997 case RUSAGE_CHILDREN: 998 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 999 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1000 r.ru_minflt = current->signal->cmin_flt; 1001 r.ru_majflt = current->signal->cmaj_flt; 1002 break; 1003 } 1004 1005 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1006 } 1007 1008 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1009 struct rusage32 __user *, ur) 1010 { 1011 struct rusage r; 1012 long ret, err; 1013 unsigned int status = 0; 1014 mm_segment_t old_fs; 1015 1016 if (!ur) 1017 return sys_wait4(pid, ustatus, options, NULL); 1018 1019 old_fs = get_fs(); 1020 1021 set_fs (KERNEL_DS); 1022 ret = sys_wait4(pid, (unsigned int __user *) &status, options, 1023 (struct rusage __user *) &r); 1024 set_fs (old_fs); 1025 1026 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1027 return -EFAULT; 1028 1029 err = 0; 1030 err |= put_user(status, ustatus); 1031 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1032 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1033 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1034 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1035 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1036 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1037 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1038 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1039 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1040 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1041 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1042 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1043 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1044 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1045 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1046 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1047 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1048 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1049 1050 return err ? err : ret; 1051 } 1052 1053 /* 1054 * I don't know what the parameters are: the first one 1055 * seems to be a timeval pointer, and I suspect the second 1056 * one is the time remaining.. Ho humm.. No documentation. 1057 */ 1058 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1059 struct timeval32 __user *, remain) 1060 { 1061 struct timeval tmp; 1062 unsigned long ticks; 1063 1064 if (get_tv32(&tmp, sleep)) 1065 goto fault; 1066 1067 ticks = timeval_to_jiffies(&tmp); 1068 1069 ticks = schedule_timeout_interruptible(ticks); 1070 1071 if (remain) { 1072 jiffies_to_timeval(ticks, &tmp); 1073 if (put_tv32(remain, &tmp)) 1074 goto fault; 1075 } 1076 1077 return 0; 1078 fault: 1079 return -EFAULT; 1080 } 1081 1082 1083 struct timex32 { 1084 unsigned int modes; /* mode selector */ 1085 long offset; /* time offset (usec) */ 1086 long freq; /* frequency offset (scaled ppm) */ 1087 long maxerror; /* maximum error (usec) */ 1088 long esterror; /* estimated error (usec) */ 1089 int status; /* clock command/status */ 1090 long constant; /* pll time constant */ 1091 long precision; /* clock precision (usec) (read only) */ 1092 long tolerance; /* clock frequency tolerance (ppm) 1093 * (read only) 1094 */ 1095 struct timeval32 time; /* (read only) */ 1096 long tick; /* (modified) usecs between clock ticks */ 1097 1098 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1099 long jitter; /* pps jitter (us) (ro) */ 1100 int shift; /* interval duration (s) (shift) (ro) */ 1101 long stabil; /* pps stability (scaled ppm) (ro) */ 1102 long jitcnt; /* jitter limit exceeded (ro) */ 1103 long calcnt; /* calibration intervals (ro) */ 1104 long errcnt; /* calibration errors (ro) */ 1105 long stbcnt; /* stability limit exceeded (ro) */ 1106 1107 int :32; int :32; int :32; int :32; 1108 int :32; int :32; int :32; int :32; 1109 int :32; int :32; int :32; int :32; 1110 }; 1111 1112 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1113 { 1114 struct timex txc; 1115 int ret; 1116 1117 /* copy relevant bits of struct timex. */ 1118 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1119 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1120 offsetof(struct timex32, time))) 1121 return -EFAULT; 1122 1123 ret = do_adjtimex(&txc); 1124 if (ret < 0) 1125 return ret; 1126 1127 /* copy back to timex32 */ 1128 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1129 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1130 offsetof(struct timex32, tick))) || 1131 (put_tv32(&txc_p->time, &txc.time))) 1132 return -EFAULT; 1133 1134 return ret; 1135 } 1136 1137 /* Get an address range which is currently unmapped. Similar to the 1138 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1139 1140 static unsigned long 1141 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1142 unsigned long limit) 1143 { 1144 struct vm_area_struct *vma = find_vma(current->mm, addr); 1145 1146 while (1) { 1147 /* At this point: (!vma || addr < vma->vm_end). */ 1148 if (limit - len < addr) 1149 return -ENOMEM; 1150 if (!vma || addr + len <= vma->vm_start) 1151 return addr; 1152 addr = vma->vm_end; 1153 vma = vma->vm_next; 1154 } 1155 } 1156 1157 unsigned long 1158 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1159 unsigned long len, unsigned long pgoff, 1160 unsigned long flags) 1161 { 1162 unsigned long limit; 1163 1164 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1165 if (current->personality & ADDR_LIMIT_32BIT) 1166 limit = 0x80000000; 1167 else 1168 limit = TASK_SIZE; 1169 1170 if (len > limit) 1171 return -ENOMEM; 1172 1173 if (flags & MAP_FIXED) 1174 return addr; 1175 1176 /* First, see if the given suggestion fits. 1177 1178 The OSF/1 loader (/sbin/loader) relies on us returning an 1179 address larger than the requested if one exists, which is 1180 a terribly broken way to program. 1181 1182 That said, I can see the use in being able to suggest not 1183 merely specific addresses, but regions of memory -- perhaps 1184 this feature should be incorporated into all ports? */ 1185 1186 if (addr) { 1187 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1188 if (addr != (unsigned long) -ENOMEM) 1189 return addr; 1190 } 1191 1192 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1193 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1194 len, limit); 1195 if (addr != (unsigned long) -ENOMEM) 1196 return addr; 1197 1198 /* Finally, try allocating in low memory. */ 1199 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1200 1201 return addr; 1202 } 1203 1204 #ifdef CONFIG_OSF4_COMPAT 1205 1206 /* Clear top 32 bits of iov_len in the user's buffer for 1207 compatibility with old versions of OSF/1 where iov_len 1208 was defined as int. */ 1209 static int 1210 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1211 { 1212 unsigned long i; 1213 1214 for (i = 0 ; i < count ; i++) { 1215 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1216 1217 if (put_user(0, iov_len_high)) 1218 return -EFAULT; 1219 } 1220 return 0; 1221 } 1222 1223 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1224 const struct iovec __user *, vector, unsigned long, count) 1225 { 1226 if (unlikely(personality(current->personality) == PER_OSF4)) 1227 if (osf_fix_iov_len(vector, count)) 1228 return -EFAULT; 1229 return sys_readv(fd, vector, count); 1230 } 1231 1232 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1233 const struct iovec __user *, vector, unsigned long, count) 1234 { 1235 if (unlikely(personality(current->personality) == PER_OSF4)) 1236 if (osf_fix_iov_len(vector, count)) 1237 return -EFAULT; 1238 return sys_writev(fd, vector, count); 1239 } 1240 1241 #endif 1242