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