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/smp_lock.h> 19 #include <linux/stddef.h> 20 #include <linux/syscalls.h> 21 #include <linux/unistd.h> 22 #include <linux/ptrace.h> 23 #include <linux/slab.h> 24 #include <linux/user.h> 25 #include <linux/utsname.h> 26 #include <linux/time.h> 27 #include <linux/timex.h> 28 #include <linux/major.h> 29 #include <linux/stat.h> 30 #include <linux/mman.h> 31 #include <linux/shm.h> 32 #include <linux/poll.h> 33 #include <linux/file.h> 34 #include <linux/types.h> 35 #include <linux/ipc.h> 36 #include <linux/namei.h> 37 #include <linux/uio.h> 38 #include <linux/vfs.h> 39 #include <linux/rcupdate.h> 40 41 #include <asm/fpu.h> 42 #include <asm/io.h> 43 #include <asm/uaccess.h> 44 #include <asm/system.h> 45 #include <asm/sysinfo.h> 46 #include <asm/hwrpb.h> 47 #include <asm/processor.h> 48 49 extern int do_pipe(int *); 50 51 /* 52 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 53 * which OSF programs just shouldn't be doing. We're still not quite 54 * identical to OSF as we don't return 0 on success, but doing otherwise 55 * would require changes to libc. Hopefully this is good enough. 56 */ 57 asmlinkage unsigned long 58 osf_brk(unsigned long brk) 59 { 60 unsigned long retval = sys_brk(brk); 61 if (brk && brk != retval) 62 retval = -ENOMEM; 63 return retval; 64 } 65 66 /* 67 * This is pure guess-work.. 68 */ 69 asmlinkage int 70 osf_set_program_attributes(unsigned long text_start, unsigned long text_len, 71 unsigned long bss_start, unsigned long bss_len) 72 { 73 struct mm_struct *mm; 74 75 lock_kernel(); 76 mm = current->mm; 77 mm->end_code = bss_start + bss_len; 78 mm->brk = bss_start + bss_len; 79 #if 0 80 printk("set_program_attributes(%lx %lx %lx %lx)\n", 81 text_start, text_len, bss_start, bss_len); 82 #endif 83 unlock_kernel(); 84 return 0; 85 } 86 87 /* 88 * OSF/1 directory handling functions... 89 * 90 * The "getdents()" interface is much more sane: the "basep" stuff is 91 * braindamage (it can't really handle filesystems where the directory 92 * offset differences aren't the same as "d_reclen"). 93 */ 94 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 95 96 struct osf_dirent { 97 unsigned int d_ino; 98 unsigned short d_reclen; 99 unsigned short d_namlen; 100 char d_name[1]; 101 }; 102 103 struct osf_dirent_callback { 104 struct osf_dirent __user *dirent; 105 long __user *basep; 106 unsigned int count; 107 int error; 108 }; 109 110 static int 111 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 112 u64 ino, unsigned int d_type) 113 { 114 struct osf_dirent __user *dirent; 115 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 116 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 117 unsigned int d_ino; 118 119 buf->error = -EINVAL; /* only used if we fail */ 120 if (reclen > buf->count) 121 return -EINVAL; 122 d_ino = ino; 123 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) 124 return -EOVERFLOW; 125 if (buf->basep) { 126 if (put_user(offset, buf->basep)) 127 return -EFAULT; 128 buf->basep = NULL; 129 } 130 dirent = buf->dirent; 131 put_user(d_ino, &dirent->d_ino); 132 put_user(namlen, &dirent->d_namlen); 133 put_user(reclen, &dirent->d_reclen); 134 if (copy_to_user(dirent->d_name, name, namlen) || 135 put_user(0, dirent->d_name + namlen)) 136 return -EFAULT; 137 dirent = (void __user *)dirent + reclen; 138 buf->dirent = dirent; 139 buf->count -= reclen; 140 return 0; 141 } 142 143 asmlinkage int 144 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, 145 unsigned int count, 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 goto out_putf; 164 165 error = buf.error; 166 if (count != buf.count) 167 error = count - buf.count; 168 169 out_putf: 170 fput(file); 171 out: 172 return error; 173 } 174 175 #undef NAME_OFFSET 176 177 asmlinkage unsigned long 178 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, 179 unsigned long flags, unsigned long fd, unsigned long off) 180 { 181 struct file *file = NULL; 182 unsigned long ret = -EBADF; 183 184 #if 0 185 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 186 printk("%s: unimplemented OSF mmap flags %04lx\n", 187 current->comm, flags); 188 #endif 189 if (!(flags & MAP_ANONYMOUS)) { 190 file = fget(fd); 191 if (!file) 192 goto out; 193 } 194 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); 195 down_write(¤t->mm->mmap_sem); 196 ret = do_mmap(file, addr, len, prot, flags, off); 197 up_write(¤t->mm->mmap_sem); 198 if (file) 199 fput(file); 200 out: 201 return ret; 202 } 203 204 205 /* 206 * The OSF/1 statfs structure is much larger, but this should 207 * match the beginning, at least. 208 */ 209 struct osf_statfs { 210 short f_type; 211 short f_flags; 212 int f_fsize; 213 int f_bsize; 214 int f_blocks; 215 int f_bfree; 216 int f_bavail; 217 int f_files; 218 int f_ffree; 219 __kernel_fsid_t f_fsid; 220 }; 221 222 static int 223 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 224 unsigned long bufsiz) 225 { 226 struct osf_statfs tmp_stat; 227 228 tmp_stat.f_type = linux_stat->f_type; 229 tmp_stat.f_flags = 0; /* mount flags */ 230 tmp_stat.f_fsize = linux_stat->f_frsize; 231 tmp_stat.f_bsize = linux_stat->f_bsize; 232 tmp_stat.f_blocks = linux_stat->f_blocks; 233 tmp_stat.f_bfree = linux_stat->f_bfree; 234 tmp_stat.f_bavail = linux_stat->f_bavail; 235 tmp_stat.f_files = linux_stat->f_files; 236 tmp_stat.f_ffree = linux_stat->f_ffree; 237 tmp_stat.f_fsid = linux_stat->f_fsid; 238 if (bufsiz > sizeof(tmp_stat)) 239 bufsiz = sizeof(tmp_stat); 240 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 241 } 242 243 static int 244 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, 245 unsigned long bufsiz) 246 { 247 struct kstatfs linux_stat; 248 int error = vfs_statfs(dentry, &linux_stat); 249 if (!error) 250 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 251 return error; 252 } 253 254 asmlinkage int 255 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz) 256 { 257 struct nameidata nd; 258 int retval; 259 260 retval = user_path_walk(path, &nd); 261 if (!retval) { 262 retval = do_osf_statfs(nd.path.dentry, buffer, bufsiz); 263 path_put(&nd.path); 264 } 265 return retval; 266 } 267 268 asmlinkage int 269 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) 270 { 271 struct file *file; 272 int retval; 273 274 retval = -EBADF; 275 file = fget(fd); 276 if (file) { 277 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz); 278 fput(file); 279 } 280 return retval; 281 } 282 283 /* 284 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 285 * 286 * Although to be frank, neither are the native Linux/i386 ones.. 287 */ 288 struct ufs_args { 289 char __user *devname; 290 int flags; 291 uid_t exroot; 292 }; 293 294 struct cdfs_args { 295 char __user *devname; 296 int flags; 297 uid_t exroot; 298 299 /* This has lots more here, which Linux handles with the option block 300 but I'm too lazy to do the translation into ASCII. */ 301 }; 302 303 struct procfs_args { 304 char __user *devname; 305 int flags; 306 uid_t exroot; 307 }; 308 309 /* 310 * We can't actually handle ufs yet, so we translate UFS mounts to 311 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 312 * layout is so braindead it's a major headache doing it. 313 * 314 * Just how long ago was it written? OTOH our UFS driver may be still 315 * unhappy with OSF UFS. [CHECKME] 316 */ 317 static int 318 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 319 { 320 int retval; 321 struct cdfs_args tmp; 322 char *devname; 323 324 retval = -EFAULT; 325 if (copy_from_user(&tmp, args, sizeof(tmp))) 326 goto out; 327 devname = getname(tmp.devname); 328 retval = PTR_ERR(devname); 329 if (IS_ERR(devname)) 330 goto out; 331 retval = do_mount(devname, dirname, "ext2", flags, NULL); 332 putname(devname); 333 out: 334 return retval; 335 } 336 337 static int 338 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 339 { 340 int retval; 341 struct cdfs_args tmp; 342 char *devname; 343 344 retval = -EFAULT; 345 if (copy_from_user(&tmp, args, sizeof(tmp))) 346 goto out; 347 devname = getname(tmp.devname); 348 retval = PTR_ERR(devname); 349 if (IS_ERR(devname)) 350 goto out; 351 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 352 putname(devname); 353 out: 354 return retval; 355 } 356 357 static int 358 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 359 { 360 struct procfs_args tmp; 361 362 if (copy_from_user(&tmp, args, sizeof(tmp))) 363 return -EFAULT; 364 365 return do_mount("", dirname, "proc", flags, NULL); 366 } 367 368 asmlinkage int 369 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) 370 { 371 int retval = -EINVAL; 372 char *name; 373 374 lock_kernel(); 375 376 name = getname(path); 377 retval = PTR_ERR(name); 378 if (IS_ERR(name)) 379 goto out; 380 switch (typenr) { 381 case 1: 382 retval = osf_ufs_mount(name, data, flag); 383 break; 384 case 6: 385 retval = osf_cdfs_mount(name, data, flag); 386 break; 387 case 9: 388 retval = osf_procfs_mount(name, data, flag); 389 break; 390 default: 391 printk("osf_mount(%ld, %x)\n", typenr, flag); 392 } 393 putname(name); 394 out: 395 unlock_kernel(); 396 return retval; 397 } 398 399 asmlinkage int 400 osf_utsname(char __user *name) 401 { 402 int error; 403 404 down_read(&uts_sem); 405 error = -EFAULT; 406 if (copy_to_user(name + 0, utsname()->sysname, 32)) 407 goto out; 408 if (copy_to_user(name + 32, utsname()->nodename, 32)) 409 goto out; 410 if (copy_to_user(name + 64, utsname()->release, 32)) 411 goto out; 412 if (copy_to_user(name + 96, utsname()->version, 32)) 413 goto out; 414 if (copy_to_user(name + 128, utsname()->machine, 32)) 415 goto out; 416 417 error = 0; 418 out: 419 up_read(&uts_sem); 420 return error; 421 } 422 423 asmlinkage unsigned long 424 sys_getpagesize(void) 425 { 426 return PAGE_SIZE; 427 } 428 429 asmlinkage unsigned long 430 sys_getdtablesize(void) 431 { 432 return sysctl_nr_open; 433 } 434 435 /* 436 * For compatibility with OSF/1 only. Use utsname(2) instead. 437 */ 438 asmlinkage int 439 osf_getdomainname(char __user *name, int namelen) 440 { 441 unsigned len; 442 int i; 443 444 if (!access_ok(VERIFY_WRITE, name, namelen)) 445 return -EFAULT; 446 447 len = namelen; 448 if (namelen > 32) 449 len = 32; 450 451 down_read(&uts_sem); 452 for (i = 0; i < len; ++i) { 453 __put_user(utsname()->domainname[i], name + i); 454 if (utsname()->domainname[i] == '\0') 455 break; 456 } 457 up_read(&uts_sem); 458 459 return 0; 460 } 461 462 /* 463 * The following stuff should move into a header file should it ever 464 * be labeled "officially supported." Right now, there is just enough 465 * support to avoid applications (such as tar) printing error 466 * messages. The attributes are not really implemented. 467 */ 468 469 /* 470 * Values for Property list entry flag 471 */ 472 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 473 by default */ 474 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 475 #define PLE_FLAG_ALL -1 /* All flag value */ 476 477 struct proplistname_args { 478 unsigned int pl_mask; 479 unsigned int pl_numnames; 480 char **pl_names; 481 }; 482 483 union pl_args { 484 struct setargs { 485 char __user *path; 486 long follow; 487 long nbytes; 488 char __user *buf; 489 } set; 490 struct fsetargs { 491 long fd; 492 long nbytes; 493 char __user *buf; 494 } fset; 495 struct getargs { 496 char __user *path; 497 long follow; 498 struct proplistname_args __user *name_args; 499 long nbytes; 500 char __user *buf; 501 int __user *min_buf_size; 502 } get; 503 struct fgetargs { 504 long fd; 505 struct proplistname_args __user *name_args; 506 long nbytes; 507 char __user *buf; 508 int __user *min_buf_size; 509 } fget; 510 struct delargs { 511 char __user *path; 512 long follow; 513 struct proplistname_args __user *name_args; 514 } del; 515 struct fdelargs { 516 long fd; 517 struct proplistname_args __user *name_args; 518 } fdel; 519 }; 520 521 enum pl_code { 522 PL_SET = 1, PL_FSET = 2, 523 PL_GET = 3, PL_FGET = 4, 524 PL_DEL = 5, PL_FDEL = 6 525 }; 526 527 asmlinkage long 528 osf_proplist_syscall(enum pl_code code, union pl_args __user *args) 529 { 530 long error; 531 int __user *min_buf_size_ptr; 532 533 lock_kernel(); 534 switch (code) { 535 case PL_SET: 536 if (get_user(error, &args->set.nbytes)) 537 error = -EFAULT; 538 break; 539 case PL_FSET: 540 if (get_user(error, &args->fset.nbytes)) 541 error = -EFAULT; 542 break; 543 case PL_GET: 544 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 545 if (error) 546 break; 547 error = put_user(0, min_buf_size_ptr); 548 break; 549 case PL_FGET: 550 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 551 if (error) 552 break; 553 error = put_user(0, min_buf_size_ptr); 554 break; 555 case PL_DEL: 556 case PL_FDEL: 557 error = 0; 558 break; 559 default: 560 error = -EOPNOTSUPP; 561 break; 562 }; 563 unlock_kernel(); 564 return error; 565 } 566 567 asmlinkage int 568 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) 569 { 570 unsigned long usp = rdusp(); 571 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 572 unsigned long oss_os = on_sig_stack(usp); 573 int error; 574 575 if (uss) { 576 void __user *ss_sp; 577 578 error = -EFAULT; 579 if (get_user(ss_sp, &uss->ss_sp)) 580 goto out; 581 582 /* If the current stack was set with sigaltstack, don't 583 swap stacks while we are on it. */ 584 error = -EPERM; 585 if (current->sas_ss_sp && on_sig_stack(usp)) 586 goto out; 587 588 /* Since we don't know the extent of the stack, and we don't 589 track onstack-ness, but rather calculate it, we must 590 presume a size. Ho hum this interface is lossy. */ 591 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 592 current->sas_ss_size = SIGSTKSZ; 593 } 594 595 if (uoss) { 596 error = -EFAULT; 597 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 598 || __put_user(oss_sp, &uoss->ss_sp) 599 || __put_user(oss_os, &uoss->ss_onstack)) 600 goto out; 601 } 602 603 error = 0; 604 out: 605 return error; 606 } 607 608 asmlinkage long 609 osf_sysinfo(int command, char __user *buf, long count) 610 { 611 char *sysinfo_table[] = { 612 utsname()->sysname, 613 utsname()->nodename, 614 utsname()->release, 615 utsname()->version, 616 utsname()->machine, 617 "alpha", /* instruction set architecture */ 618 "dummy", /* hardware serial number */ 619 "dummy", /* hardware manufacturer */ 620 "dummy", /* secure RPC domain */ 621 }; 622 unsigned long offset; 623 char *res; 624 long len, err = -EINVAL; 625 626 offset = command-1; 627 if (offset >= ARRAY_SIZE(sysinfo_table)) { 628 /* Digital UNIX has a few unpublished interfaces here */ 629 printk("sysinfo(%d)", command); 630 goto out; 631 } 632 633 down_read(&uts_sem); 634 res = sysinfo_table[offset]; 635 len = strlen(res)+1; 636 if (len > count) 637 len = count; 638 if (copy_to_user(buf, res, len)) 639 err = -EFAULT; 640 else 641 err = 0; 642 up_read(&uts_sem); 643 out: 644 return err; 645 } 646 647 asmlinkage unsigned long 648 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 649 int __user *start, void __user *arg) 650 { 651 unsigned long w; 652 struct percpu_struct *cpu; 653 654 switch (op) { 655 case GSI_IEEE_FP_CONTROL: 656 /* Return current software fp control & status bits. */ 657 /* Note that DU doesn't verify available space here. */ 658 659 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 660 w = swcr_update_status(w, rdfpcr()); 661 if (put_user(w, (unsigned long __user *) buffer)) 662 return -EFAULT; 663 return 0; 664 665 case GSI_IEEE_STATE_AT_SIGNAL: 666 /* 667 * Not sure anybody will ever use this weird stuff. These 668 * ops can be used (under OSF/1) to set the fpcr that should 669 * be used when a signal handler starts executing. 670 */ 671 break; 672 673 case GSI_UACPROC: 674 if (nbytes < sizeof(unsigned int)) 675 return -EINVAL; 676 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 677 if (put_user(w, (unsigned int __user *)buffer)) 678 return -EFAULT; 679 return 1; 680 681 case GSI_PROC_TYPE: 682 if (nbytes < sizeof(unsigned long)) 683 return -EINVAL; 684 cpu = (struct percpu_struct*) 685 ((char*)hwrpb + hwrpb->processor_offset); 686 w = cpu->type; 687 if (put_user(w, (unsigned long __user*)buffer)) 688 return -EFAULT; 689 return 1; 690 691 case GSI_GET_HWRPB: 692 if (nbytes < sizeof(*hwrpb)) 693 return -EINVAL; 694 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 695 return -EFAULT; 696 return 1; 697 698 default: 699 break; 700 } 701 702 return -EOPNOTSUPP; 703 } 704 705 asmlinkage unsigned long 706 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 707 int __user *start, void __user *arg) 708 { 709 switch (op) { 710 case SSI_IEEE_FP_CONTROL: { 711 unsigned long swcr, fpcr; 712 unsigned int *state; 713 714 /* 715 * Alpha Architecture Handbook 4.7.7.3: 716 * To be fully IEEE compiant, we must track the current IEEE 717 * exception state in software, because spurious bits can be 718 * set in the trap shadow of a software-complete insn. 719 */ 720 721 if (get_user(swcr, (unsigned long __user *)buffer)) 722 return -EFAULT; 723 state = ¤t_thread_info()->ieee_state; 724 725 /* Update softare trap enable bits. */ 726 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 727 728 /* Update the real fpcr. */ 729 fpcr = rdfpcr() & FPCR_DYN_MASK; 730 fpcr |= ieee_swcr_to_fpcr(swcr); 731 wrfpcr(fpcr); 732 733 return 0; 734 } 735 736 case SSI_IEEE_RAISE_EXCEPTION: { 737 unsigned long exc, swcr, fpcr, fex; 738 unsigned int *state; 739 740 if (get_user(exc, (unsigned long __user *)buffer)) 741 return -EFAULT; 742 state = ¤t_thread_info()->ieee_state; 743 exc &= IEEE_STATUS_MASK; 744 745 /* Update softare trap enable bits. */ 746 swcr = (*state & IEEE_SW_MASK) | exc; 747 *state |= exc; 748 749 /* Update the real fpcr. */ 750 fpcr = rdfpcr(); 751 fpcr |= ieee_swcr_to_fpcr(swcr); 752 wrfpcr(fpcr); 753 754 /* If any exceptions set by this call, and are unmasked, 755 send a signal. Old exceptions are not signaled. */ 756 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 757 if (fex) { 758 siginfo_t info; 759 int si_code = 0; 760 761 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 762 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 763 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 764 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 765 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 766 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 767 768 info.si_signo = SIGFPE; 769 info.si_errno = 0; 770 info.si_code = si_code; 771 info.si_addr = NULL; /* FIXME */ 772 send_sig_info(SIGFPE, &info, current); 773 } 774 return 0; 775 } 776 777 case SSI_IEEE_STATE_AT_SIGNAL: 778 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 779 /* 780 * Not sure anybody will ever use this weird stuff. These 781 * ops can be used (under OSF/1) to set the fpcr that should 782 * be used when a signal handler starts executing. 783 */ 784 break; 785 786 case SSI_NVPAIRS: { 787 unsigned long v, w, i; 788 unsigned int old, new; 789 790 for (i = 0; i < nbytes; ++i) { 791 792 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 793 return -EFAULT; 794 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 795 return -EFAULT; 796 switch (v) { 797 case SSIN_UACPROC: 798 again: 799 old = current_thread_info()->flags; 800 new = old & ~(UAC_BITMASK << UAC_SHIFT); 801 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 802 if (cmpxchg(¤t_thread_info()->flags, 803 old, new) != old) 804 goto again; 805 break; 806 807 default: 808 return -EOPNOTSUPP; 809 } 810 } 811 return 0; 812 } 813 814 default: 815 break; 816 } 817 818 return -EOPNOTSUPP; 819 } 820 821 /* Translations due to the fact that OSF's time_t is an int. Which 822 affects all sorts of things, like timeval and itimerval. */ 823 824 extern struct timezone sys_tz; 825 826 struct timeval32 827 { 828 int tv_sec, tv_usec; 829 }; 830 831 struct itimerval32 832 { 833 struct timeval32 it_interval; 834 struct timeval32 it_value; 835 }; 836 837 static inline long 838 get_tv32(struct timeval *o, struct timeval32 __user *i) 839 { 840 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 841 (__get_user(o->tv_sec, &i->tv_sec) | 842 __get_user(o->tv_usec, &i->tv_usec))); 843 } 844 845 static inline long 846 put_tv32(struct timeval32 __user *o, struct timeval *i) 847 { 848 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 849 (__put_user(i->tv_sec, &o->tv_sec) | 850 __put_user(i->tv_usec, &o->tv_usec))); 851 } 852 853 static inline long 854 get_it32(struct itimerval *o, struct itimerval32 __user *i) 855 { 856 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 857 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 858 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 859 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 860 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 861 } 862 863 static inline long 864 put_it32(struct itimerval32 __user *o, struct itimerval *i) 865 { 866 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 867 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 868 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 869 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 870 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 871 } 872 873 static inline void 874 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 875 { 876 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 877 value->tv_sec = jiffies / HZ; 878 } 879 880 asmlinkage int 881 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 882 { 883 if (tv) { 884 struct timeval ktv; 885 do_gettimeofday(&ktv); 886 if (put_tv32(tv, &ktv)) 887 return -EFAULT; 888 } 889 if (tz) { 890 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 891 return -EFAULT; 892 } 893 return 0; 894 } 895 896 asmlinkage int 897 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 898 { 899 struct timespec kts; 900 struct timezone ktz; 901 902 if (tv) { 903 if (get_tv32((struct timeval *)&kts, tv)) 904 return -EFAULT; 905 } 906 if (tz) { 907 if (copy_from_user(&ktz, tz, sizeof(*tz))) 908 return -EFAULT; 909 } 910 911 kts.tv_nsec *= 1000; 912 913 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 914 } 915 916 asmlinkage int 917 osf_getitimer(int which, struct itimerval32 __user *it) 918 { 919 struct itimerval kit; 920 int error; 921 922 error = do_getitimer(which, &kit); 923 if (!error && put_it32(it, &kit)) 924 error = -EFAULT; 925 926 return error; 927 } 928 929 asmlinkage int 930 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) 931 { 932 struct itimerval kin, kout; 933 int error; 934 935 if (in) { 936 if (get_it32(&kin, in)) 937 return -EFAULT; 938 } else 939 memset(&kin, 0, sizeof(kin)); 940 941 error = do_setitimer(which, &kin, out ? &kout : NULL); 942 if (error || !out) 943 return error; 944 945 if (put_it32(out, &kout)) 946 return -EFAULT; 947 948 return 0; 949 950 } 951 952 asmlinkage int 953 osf_utimes(char __user *filename, struct timeval32 __user *tvs) 954 { 955 struct timespec tv[2]; 956 957 if (tvs) { 958 struct timeval ktvs[2]; 959 if (get_tv32(&ktvs[0], &tvs[0]) || 960 get_tv32(&ktvs[1], &tvs[1])) 961 return -EFAULT; 962 963 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 964 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 965 return -EINVAL; 966 967 tv[0].tv_sec = ktvs[0].tv_sec; 968 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 969 tv[1].tv_sec = ktvs[1].tv_sec; 970 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 971 } 972 973 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 974 } 975 976 #define MAX_SELECT_SECONDS \ 977 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) 978 979 asmlinkage int 980 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, 981 struct timeval32 __user *tvp) 982 { 983 fd_set_bits fds; 984 char *bits; 985 size_t size; 986 long timeout; 987 int ret = -EINVAL; 988 struct fdtable *fdt; 989 int max_fds; 990 991 timeout = MAX_SCHEDULE_TIMEOUT; 992 if (tvp) { 993 time_t sec, usec; 994 995 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 996 || __get_user(sec, &tvp->tv_sec) 997 || __get_user(usec, &tvp->tv_usec)) { 998 ret = -EFAULT; 999 goto out_nofds; 1000 } 1001 1002 if (sec < 0 || usec < 0) 1003 goto out_nofds; 1004 1005 if ((unsigned long) sec < MAX_SELECT_SECONDS) { 1006 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); 1007 timeout += sec * (unsigned long) HZ; 1008 } 1009 } 1010 1011 rcu_read_lock(); 1012 fdt = files_fdtable(current->files); 1013 max_fds = fdt->max_fds; 1014 rcu_read_unlock(); 1015 if (n < 0 || n > max_fds) 1016 goto out_nofds; 1017 1018 /* 1019 * We need 6 bitmaps (in/out/ex for both incoming and outgoing), 1020 * since we used fdset we need to allocate memory in units of 1021 * long-words. 1022 */ 1023 ret = -ENOMEM; 1024 size = FDS_BYTES(n); 1025 bits = kmalloc(6 * size, GFP_KERNEL); 1026 if (!bits) 1027 goto out_nofds; 1028 fds.in = (unsigned long *) bits; 1029 fds.out = (unsigned long *) (bits + size); 1030 fds.ex = (unsigned long *) (bits + 2*size); 1031 fds.res_in = (unsigned long *) (bits + 3*size); 1032 fds.res_out = (unsigned long *) (bits + 4*size); 1033 fds.res_ex = (unsigned long *) (bits + 5*size); 1034 1035 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || 1036 (ret = get_fd_set(n, outp->fds_bits, fds.out)) || 1037 (ret = get_fd_set(n, exp->fds_bits, fds.ex))) 1038 goto out; 1039 zero_fd_set(n, fds.res_in); 1040 zero_fd_set(n, fds.res_out); 1041 zero_fd_set(n, fds.res_ex); 1042 1043 ret = do_select(n, &fds, &timeout); 1044 1045 /* OSF does not copy back the remaining time. */ 1046 1047 if (ret < 0) 1048 goto out; 1049 if (!ret) { 1050 ret = -ERESTARTNOHAND; 1051 if (signal_pending(current)) 1052 goto out; 1053 ret = 0; 1054 } 1055 1056 if (set_fd_set(n, inp->fds_bits, fds.res_in) || 1057 set_fd_set(n, outp->fds_bits, fds.res_out) || 1058 set_fd_set(n, exp->fds_bits, fds.res_ex)) 1059 ret = -EFAULT; 1060 1061 out: 1062 kfree(bits); 1063 out_nofds: 1064 return ret; 1065 } 1066 1067 struct rusage32 { 1068 struct timeval32 ru_utime; /* user time used */ 1069 struct timeval32 ru_stime; /* system time used */ 1070 long ru_maxrss; /* maximum resident set size */ 1071 long ru_ixrss; /* integral shared memory size */ 1072 long ru_idrss; /* integral unshared data size */ 1073 long ru_isrss; /* integral unshared stack size */ 1074 long ru_minflt; /* page reclaims */ 1075 long ru_majflt; /* page faults */ 1076 long ru_nswap; /* swaps */ 1077 long ru_inblock; /* block input operations */ 1078 long ru_oublock; /* block output operations */ 1079 long ru_msgsnd; /* messages sent */ 1080 long ru_msgrcv; /* messages received */ 1081 long ru_nsignals; /* signals received */ 1082 long ru_nvcsw; /* voluntary context switches */ 1083 long ru_nivcsw; /* involuntary " */ 1084 }; 1085 1086 asmlinkage int 1087 osf_getrusage(int who, struct rusage32 __user *ru) 1088 { 1089 struct rusage32 r; 1090 1091 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1092 return -EINVAL; 1093 1094 memset(&r, 0, sizeof(r)); 1095 switch (who) { 1096 case RUSAGE_SELF: 1097 jiffies_to_timeval32(current->utime, &r.ru_utime); 1098 jiffies_to_timeval32(current->stime, &r.ru_stime); 1099 r.ru_minflt = current->min_flt; 1100 r.ru_majflt = current->maj_flt; 1101 break; 1102 case RUSAGE_CHILDREN: 1103 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1104 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1105 r.ru_minflt = current->signal->cmin_flt; 1106 r.ru_majflt = current->signal->cmaj_flt; 1107 break; 1108 } 1109 1110 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1111 } 1112 1113 asmlinkage long 1114 osf_wait4(pid_t pid, int __user *ustatus, int options, 1115 struct rusage32 __user *ur) 1116 { 1117 struct rusage r; 1118 long ret, err; 1119 mm_segment_t old_fs; 1120 1121 if (!ur) 1122 return sys_wait4(pid, ustatus, options, NULL); 1123 1124 old_fs = get_fs(); 1125 1126 set_fs (KERNEL_DS); 1127 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1128 set_fs (old_fs); 1129 1130 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1131 return -EFAULT; 1132 1133 err = 0; 1134 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1135 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1136 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1137 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1138 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1139 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1140 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1141 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1142 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1143 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1144 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1145 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1146 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1147 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1148 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1149 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1150 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1151 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1152 1153 return err ? err : ret; 1154 } 1155 1156 /* 1157 * I don't know what the parameters are: the first one 1158 * seems to be a timeval pointer, and I suspect the second 1159 * one is the time remaining.. Ho humm.. No documentation. 1160 */ 1161 asmlinkage int 1162 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) 1163 { 1164 struct timeval tmp; 1165 unsigned long ticks; 1166 1167 if (get_tv32(&tmp, sleep)) 1168 goto fault; 1169 1170 ticks = timeval_to_jiffies(&tmp); 1171 1172 ticks = schedule_timeout_interruptible(ticks); 1173 1174 if (remain) { 1175 jiffies_to_timeval(ticks, &tmp); 1176 if (put_tv32(remain, &tmp)) 1177 goto fault; 1178 } 1179 1180 return 0; 1181 fault: 1182 return -EFAULT; 1183 } 1184 1185 1186 struct timex32 { 1187 unsigned int modes; /* mode selector */ 1188 long offset; /* time offset (usec) */ 1189 long freq; /* frequency offset (scaled ppm) */ 1190 long maxerror; /* maximum error (usec) */ 1191 long esterror; /* estimated error (usec) */ 1192 int status; /* clock command/status */ 1193 long constant; /* pll time constant */ 1194 long precision; /* clock precision (usec) (read only) */ 1195 long tolerance; /* clock frequency tolerance (ppm) 1196 * (read only) 1197 */ 1198 struct timeval32 time; /* (read only) */ 1199 long tick; /* (modified) usecs between clock ticks */ 1200 1201 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1202 long jitter; /* pps jitter (us) (ro) */ 1203 int shift; /* interval duration (s) (shift) (ro) */ 1204 long stabil; /* pps stability (scaled ppm) (ro) */ 1205 long jitcnt; /* jitter limit exceeded (ro) */ 1206 long calcnt; /* calibration intervals (ro) */ 1207 long errcnt; /* calibration errors (ro) */ 1208 long stbcnt; /* stability limit exceeded (ro) */ 1209 1210 int :32; int :32; int :32; int :32; 1211 int :32; int :32; int :32; int :32; 1212 int :32; int :32; int :32; int :32; 1213 }; 1214 1215 asmlinkage int 1216 sys_old_adjtimex(struct timex32 __user *txc_p) 1217 { 1218 struct timex txc; 1219 int ret; 1220 1221 /* copy relevant bits of struct timex. */ 1222 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1223 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1224 offsetof(struct timex32, time))) 1225 return -EFAULT; 1226 1227 ret = do_adjtimex(&txc); 1228 if (ret < 0) 1229 return ret; 1230 1231 /* copy back to timex32 */ 1232 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1233 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1234 offsetof(struct timex32, tick))) || 1235 (put_tv32(&txc_p->time, &txc.time))) 1236 return -EFAULT; 1237 1238 return ret; 1239 } 1240 1241 /* Get an address range which is currently unmapped. Similar to the 1242 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1243 1244 static unsigned long 1245 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1246 unsigned long limit) 1247 { 1248 struct vm_area_struct *vma = find_vma(current->mm, addr); 1249 1250 while (1) { 1251 /* At this point: (!vma || addr < vma->vm_end). */ 1252 if (limit - len < addr) 1253 return -ENOMEM; 1254 if (!vma || addr + len <= vma->vm_start) 1255 return addr; 1256 addr = vma->vm_end; 1257 vma = vma->vm_next; 1258 } 1259 } 1260 1261 unsigned long 1262 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1263 unsigned long len, unsigned long pgoff, 1264 unsigned long flags) 1265 { 1266 unsigned long limit; 1267 1268 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1269 if (current->personality & ADDR_LIMIT_32BIT) 1270 limit = 0x80000000; 1271 else 1272 limit = TASK_SIZE; 1273 1274 if (len > limit) 1275 return -ENOMEM; 1276 1277 if (flags & MAP_FIXED) 1278 return addr; 1279 1280 /* First, see if the given suggestion fits. 1281 1282 The OSF/1 loader (/sbin/loader) relies on us returning an 1283 address larger than the requested if one exists, which is 1284 a terribly broken way to program. 1285 1286 That said, I can see the use in being able to suggest not 1287 merely specific addresses, but regions of memory -- perhaps 1288 this feature should be incorporated into all ports? */ 1289 1290 if (addr) { 1291 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1292 if (addr != (unsigned long) -ENOMEM) 1293 return addr; 1294 } 1295 1296 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1297 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1298 len, limit); 1299 if (addr != (unsigned long) -ENOMEM) 1300 return addr; 1301 1302 /* Finally, try allocating in low memory. */ 1303 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1304 1305 return addr; 1306 } 1307 1308 #ifdef CONFIG_OSF4_COMPAT 1309 1310 /* Clear top 32 bits of iov_len in the user's buffer for 1311 compatibility with old versions of OSF/1 where iov_len 1312 was defined as int. */ 1313 static int 1314 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1315 { 1316 unsigned long i; 1317 1318 for (i = 0 ; i < count ; i++) { 1319 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1320 1321 if (put_user(0, iov_len_high)) 1322 return -EFAULT; 1323 } 1324 return 0; 1325 } 1326 1327 asmlinkage ssize_t 1328 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1329 { 1330 if (unlikely(personality(current->personality) == PER_OSF4)) 1331 if (osf_fix_iov_len(vector, count)) 1332 return -EFAULT; 1333 return sys_readv(fd, vector, count); 1334 } 1335 1336 asmlinkage ssize_t 1337 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1338 { 1339 if (unlikely(personality(current->personality) == PER_OSF4)) 1340 if (osf_fix_iov_len(vector, count)) 1341 return -EFAULT; 1342 return sys_writev(fd, vector, count); 1343 } 1344 1345 #endif 1346