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->start_brk = bss_start + bss_len; 79 mm->brk = bss_start + bss_len; 80 #if 0 81 printk("set_program_attributes(%lx %lx %lx %lx)\n", 82 text_start, text_len, bss_start, bss_len); 83 #endif 84 unlock_kernel(); 85 return 0; 86 } 87 88 /* 89 * OSF/1 directory handling functions... 90 * 91 * The "getdents()" interface is much more sane: the "basep" stuff is 92 * braindamage (it can't really handle filesystems where the directory 93 * offset differences aren't the same as "d_reclen"). 94 */ 95 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 96 97 struct osf_dirent { 98 unsigned int d_ino; 99 unsigned short d_reclen; 100 unsigned short d_namlen; 101 char d_name[1]; 102 }; 103 104 struct osf_dirent_callback { 105 struct osf_dirent __user *dirent; 106 long __user *basep; 107 unsigned int count; 108 int error; 109 }; 110 111 static int 112 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 113 u64 ino, unsigned int d_type) 114 { 115 struct osf_dirent __user *dirent; 116 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 117 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 118 unsigned int d_ino; 119 120 buf->error = -EINVAL; /* only used if we fail */ 121 if (reclen > buf->count) 122 return -EINVAL; 123 d_ino = ino; 124 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 125 buf->error = -EOVERFLOW; 126 return -EOVERFLOW; 127 } 128 if (buf->basep) { 129 if (put_user(offset, buf->basep)) 130 goto Efault; 131 buf->basep = NULL; 132 } 133 dirent = buf->dirent; 134 if (put_user(d_ino, &dirent->d_ino) || 135 put_user(namlen, &dirent->d_namlen) || 136 put_user(reclen, &dirent->d_reclen) || 137 copy_to_user(dirent->d_name, name, namlen) || 138 put_user(0, dirent->d_name + namlen)) 139 goto Efault; 140 dirent = (void __user *)dirent + reclen; 141 buf->dirent = dirent; 142 buf->count -= reclen; 143 return 0; 144 Efault: 145 buf->error = -EFAULT; 146 return -EFAULT; 147 } 148 149 asmlinkage int 150 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, 151 unsigned int count, long __user *basep) 152 { 153 int error; 154 struct file *file; 155 struct osf_dirent_callback buf; 156 157 error = -EBADF; 158 file = fget(fd); 159 if (!file) 160 goto out; 161 162 buf.dirent = dirent; 163 buf.basep = basep; 164 buf.count = count; 165 buf.error = 0; 166 167 error = vfs_readdir(file, osf_filldir, &buf); 168 if (error >= 0) 169 error = buf.error; 170 if (count != buf.count) 171 error = count - buf.count; 172 173 fput(file); 174 out: 175 return error; 176 } 177 178 #undef NAME_OFFSET 179 180 asmlinkage unsigned long 181 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, 182 unsigned long flags, unsigned long fd, unsigned long off) 183 { 184 struct file *file = NULL; 185 unsigned long ret = -EBADF; 186 187 #if 0 188 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 189 printk("%s: unimplemented OSF mmap flags %04lx\n", 190 current->comm, flags); 191 #endif 192 if (!(flags & MAP_ANONYMOUS)) { 193 file = fget(fd); 194 if (!file) 195 goto out; 196 } 197 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); 198 down_write(¤t->mm->mmap_sem); 199 ret = do_mmap(file, addr, len, prot, flags, off); 200 up_write(¤t->mm->mmap_sem); 201 if (file) 202 fput(file); 203 out: 204 return ret; 205 } 206 207 208 /* 209 * The OSF/1 statfs structure is much larger, but this should 210 * match the beginning, at least. 211 */ 212 struct osf_statfs { 213 short f_type; 214 short f_flags; 215 int f_fsize; 216 int f_bsize; 217 int f_blocks; 218 int f_bfree; 219 int f_bavail; 220 int f_files; 221 int f_ffree; 222 __kernel_fsid_t f_fsid; 223 }; 224 225 static int 226 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 227 unsigned long bufsiz) 228 { 229 struct osf_statfs tmp_stat; 230 231 tmp_stat.f_type = linux_stat->f_type; 232 tmp_stat.f_flags = 0; /* mount flags */ 233 tmp_stat.f_fsize = linux_stat->f_frsize; 234 tmp_stat.f_bsize = linux_stat->f_bsize; 235 tmp_stat.f_blocks = linux_stat->f_blocks; 236 tmp_stat.f_bfree = linux_stat->f_bfree; 237 tmp_stat.f_bavail = linux_stat->f_bavail; 238 tmp_stat.f_files = linux_stat->f_files; 239 tmp_stat.f_ffree = linux_stat->f_ffree; 240 tmp_stat.f_fsid = linux_stat->f_fsid; 241 if (bufsiz > sizeof(tmp_stat)) 242 bufsiz = sizeof(tmp_stat); 243 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 244 } 245 246 static int 247 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, 248 unsigned long bufsiz) 249 { 250 struct kstatfs linux_stat; 251 int error = vfs_statfs(dentry, &linux_stat); 252 if (!error) 253 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 254 return error; 255 } 256 257 asmlinkage int 258 osf_statfs(char __user *pathname, struct osf_statfs __user *buffer, unsigned long bufsiz) 259 { 260 struct path path; 261 int retval; 262 263 retval = user_path(pathname, &path); 264 if (!retval) { 265 retval = do_osf_statfs(path.dentry, buffer, bufsiz); 266 path_put(&path); 267 } 268 return retval; 269 } 270 271 asmlinkage int 272 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) 273 { 274 struct file *file; 275 int retval; 276 277 retval = -EBADF; 278 file = fget(fd); 279 if (file) { 280 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz); 281 fput(file); 282 } 283 return retval; 284 } 285 286 /* 287 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 288 * 289 * Although to be frank, neither are the native Linux/i386 ones.. 290 */ 291 struct ufs_args { 292 char __user *devname; 293 int flags; 294 uid_t exroot; 295 }; 296 297 struct cdfs_args { 298 char __user *devname; 299 int flags; 300 uid_t exroot; 301 302 /* This has lots more here, which Linux handles with the option block 303 but I'm too lazy to do the translation into ASCII. */ 304 }; 305 306 struct procfs_args { 307 char __user *devname; 308 int flags; 309 uid_t exroot; 310 }; 311 312 /* 313 * We can't actually handle ufs yet, so we translate UFS mounts to 314 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 315 * layout is so braindead it's a major headache doing it. 316 * 317 * Just how long ago was it written? OTOH our UFS driver may be still 318 * unhappy with OSF UFS. [CHECKME] 319 */ 320 static int 321 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 322 { 323 int retval; 324 struct cdfs_args tmp; 325 char *devname; 326 327 retval = -EFAULT; 328 if (copy_from_user(&tmp, args, sizeof(tmp))) 329 goto out; 330 devname = getname(tmp.devname); 331 retval = PTR_ERR(devname); 332 if (IS_ERR(devname)) 333 goto out; 334 retval = do_mount(devname, dirname, "ext2", flags, NULL); 335 putname(devname); 336 out: 337 return retval; 338 } 339 340 static int 341 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 342 { 343 int retval; 344 struct cdfs_args tmp; 345 char *devname; 346 347 retval = -EFAULT; 348 if (copy_from_user(&tmp, args, sizeof(tmp))) 349 goto out; 350 devname = getname(tmp.devname); 351 retval = PTR_ERR(devname); 352 if (IS_ERR(devname)) 353 goto out; 354 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 355 putname(devname); 356 out: 357 return retval; 358 } 359 360 static int 361 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 362 { 363 struct procfs_args tmp; 364 365 if (copy_from_user(&tmp, args, sizeof(tmp))) 366 return -EFAULT; 367 368 return do_mount("", dirname, "proc", flags, NULL); 369 } 370 371 asmlinkage int 372 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) 373 { 374 int retval = -EINVAL; 375 char *name; 376 377 lock_kernel(); 378 379 name = getname(path); 380 retval = PTR_ERR(name); 381 if (IS_ERR(name)) 382 goto out; 383 switch (typenr) { 384 case 1: 385 retval = osf_ufs_mount(name, data, flag); 386 break; 387 case 6: 388 retval = osf_cdfs_mount(name, data, flag); 389 break; 390 case 9: 391 retval = osf_procfs_mount(name, data, flag); 392 break; 393 default: 394 printk("osf_mount(%ld, %x)\n", typenr, flag); 395 } 396 putname(name); 397 out: 398 unlock_kernel(); 399 return retval; 400 } 401 402 asmlinkage int 403 osf_utsname(char __user *name) 404 { 405 int error; 406 407 down_read(&uts_sem); 408 error = -EFAULT; 409 if (copy_to_user(name + 0, utsname()->sysname, 32)) 410 goto out; 411 if (copy_to_user(name + 32, utsname()->nodename, 32)) 412 goto out; 413 if (copy_to_user(name + 64, utsname()->release, 32)) 414 goto out; 415 if (copy_to_user(name + 96, utsname()->version, 32)) 416 goto out; 417 if (copy_to_user(name + 128, utsname()->machine, 32)) 418 goto out; 419 420 error = 0; 421 out: 422 up_read(&uts_sem); 423 return error; 424 } 425 426 asmlinkage unsigned long 427 sys_getpagesize(void) 428 { 429 return PAGE_SIZE; 430 } 431 432 asmlinkage unsigned long 433 sys_getdtablesize(void) 434 { 435 return sysctl_nr_open; 436 } 437 438 /* 439 * For compatibility with OSF/1 only. Use utsname(2) instead. 440 */ 441 asmlinkage int 442 osf_getdomainname(char __user *name, int namelen) 443 { 444 unsigned len; 445 int i; 446 447 if (!access_ok(VERIFY_WRITE, name, namelen)) 448 return -EFAULT; 449 450 len = namelen; 451 if (namelen > 32) 452 len = 32; 453 454 down_read(&uts_sem); 455 for (i = 0; i < len; ++i) { 456 __put_user(utsname()->domainname[i], name + i); 457 if (utsname()->domainname[i] == '\0') 458 break; 459 } 460 up_read(&uts_sem); 461 462 return 0; 463 } 464 465 /* 466 * The following stuff should move into a header file should it ever 467 * be labeled "officially supported." Right now, there is just enough 468 * support to avoid applications (such as tar) printing error 469 * messages. The attributes are not really implemented. 470 */ 471 472 /* 473 * Values for Property list entry flag 474 */ 475 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 476 by default */ 477 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 478 #define PLE_FLAG_ALL -1 /* All flag value */ 479 480 struct proplistname_args { 481 unsigned int pl_mask; 482 unsigned int pl_numnames; 483 char **pl_names; 484 }; 485 486 union pl_args { 487 struct setargs { 488 char __user *path; 489 long follow; 490 long nbytes; 491 char __user *buf; 492 } set; 493 struct fsetargs { 494 long fd; 495 long nbytes; 496 char __user *buf; 497 } fset; 498 struct getargs { 499 char __user *path; 500 long follow; 501 struct proplistname_args __user *name_args; 502 long nbytes; 503 char __user *buf; 504 int __user *min_buf_size; 505 } get; 506 struct fgetargs { 507 long fd; 508 struct proplistname_args __user *name_args; 509 long nbytes; 510 char __user *buf; 511 int __user *min_buf_size; 512 } fget; 513 struct delargs { 514 char __user *path; 515 long follow; 516 struct proplistname_args __user *name_args; 517 } del; 518 struct fdelargs { 519 long fd; 520 struct proplistname_args __user *name_args; 521 } fdel; 522 }; 523 524 enum pl_code { 525 PL_SET = 1, PL_FSET = 2, 526 PL_GET = 3, PL_FGET = 4, 527 PL_DEL = 5, PL_FDEL = 6 528 }; 529 530 asmlinkage long 531 osf_proplist_syscall(enum pl_code code, union pl_args __user *args) 532 { 533 long error; 534 int __user *min_buf_size_ptr; 535 536 lock_kernel(); 537 switch (code) { 538 case PL_SET: 539 if (get_user(error, &args->set.nbytes)) 540 error = -EFAULT; 541 break; 542 case PL_FSET: 543 if (get_user(error, &args->fset.nbytes)) 544 error = -EFAULT; 545 break; 546 case PL_GET: 547 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 548 if (error) 549 break; 550 error = put_user(0, min_buf_size_ptr); 551 break; 552 case PL_FGET: 553 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 554 if (error) 555 break; 556 error = put_user(0, min_buf_size_ptr); 557 break; 558 case PL_DEL: 559 case PL_FDEL: 560 error = 0; 561 break; 562 default: 563 error = -EOPNOTSUPP; 564 break; 565 }; 566 unlock_kernel(); 567 return error; 568 } 569 570 asmlinkage int 571 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) 572 { 573 unsigned long usp = rdusp(); 574 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 575 unsigned long oss_os = on_sig_stack(usp); 576 int error; 577 578 if (uss) { 579 void __user *ss_sp; 580 581 error = -EFAULT; 582 if (get_user(ss_sp, &uss->ss_sp)) 583 goto out; 584 585 /* If the current stack was set with sigaltstack, don't 586 swap stacks while we are on it. */ 587 error = -EPERM; 588 if (current->sas_ss_sp && on_sig_stack(usp)) 589 goto out; 590 591 /* Since we don't know the extent of the stack, and we don't 592 track onstack-ness, but rather calculate it, we must 593 presume a size. Ho hum this interface is lossy. */ 594 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 595 current->sas_ss_size = SIGSTKSZ; 596 } 597 598 if (uoss) { 599 error = -EFAULT; 600 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 601 || __put_user(oss_sp, &uoss->ss_sp) 602 || __put_user(oss_os, &uoss->ss_onstack)) 603 goto out; 604 } 605 606 error = 0; 607 out: 608 return error; 609 } 610 611 asmlinkage long 612 osf_sysinfo(int command, char __user *buf, long count) 613 { 614 char *sysinfo_table[] = { 615 utsname()->sysname, 616 utsname()->nodename, 617 utsname()->release, 618 utsname()->version, 619 utsname()->machine, 620 "alpha", /* instruction set architecture */ 621 "dummy", /* hardware serial number */ 622 "dummy", /* hardware manufacturer */ 623 "dummy", /* secure RPC domain */ 624 }; 625 unsigned long offset; 626 char *res; 627 long len, err = -EINVAL; 628 629 offset = command-1; 630 if (offset >= ARRAY_SIZE(sysinfo_table)) { 631 /* Digital UNIX has a few unpublished interfaces here */ 632 printk("sysinfo(%d)", command); 633 goto out; 634 } 635 636 down_read(&uts_sem); 637 res = sysinfo_table[offset]; 638 len = strlen(res)+1; 639 if (len > count) 640 len = count; 641 if (copy_to_user(buf, res, len)) 642 err = -EFAULT; 643 else 644 err = 0; 645 up_read(&uts_sem); 646 out: 647 return err; 648 } 649 650 asmlinkage unsigned long 651 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 652 int __user *start, void __user *arg) 653 { 654 unsigned long w; 655 struct percpu_struct *cpu; 656 657 switch (op) { 658 case GSI_IEEE_FP_CONTROL: 659 /* Return current software fp control & status bits. */ 660 /* Note that DU doesn't verify available space here. */ 661 662 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 663 w = swcr_update_status(w, rdfpcr()); 664 if (put_user(w, (unsigned long __user *) buffer)) 665 return -EFAULT; 666 return 0; 667 668 case GSI_IEEE_STATE_AT_SIGNAL: 669 /* 670 * Not sure anybody will ever use this weird stuff. These 671 * ops can be used (under OSF/1) to set the fpcr that should 672 * be used when a signal handler starts executing. 673 */ 674 break; 675 676 case GSI_UACPROC: 677 if (nbytes < sizeof(unsigned int)) 678 return -EINVAL; 679 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 680 if (put_user(w, (unsigned int __user *)buffer)) 681 return -EFAULT; 682 return 1; 683 684 case GSI_PROC_TYPE: 685 if (nbytes < sizeof(unsigned long)) 686 return -EINVAL; 687 cpu = (struct percpu_struct*) 688 ((char*)hwrpb + hwrpb->processor_offset); 689 w = cpu->type; 690 if (put_user(w, (unsigned long __user*)buffer)) 691 return -EFAULT; 692 return 1; 693 694 case GSI_GET_HWRPB: 695 if (nbytes < sizeof(*hwrpb)) 696 return -EINVAL; 697 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 698 return -EFAULT; 699 return 1; 700 701 default: 702 break; 703 } 704 705 return -EOPNOTSUPP; 706 } 707 708 asmlinkage unsigned long 709 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 710 int __user *start, void __user *arg) 711 { 712 switch (op) { 713 case SSI_IEEE_FP_CONTROL: { 714 unsigned long swcr, fpcr; 715 unsigned int *state; 716 717 /* 718 * Alpha Architecture Handbook 4.7.7.3: 719 * To be fully IEEE compiant, we must track the current IEEE 720 * exception state in software, because spurious bits can be 721 * set in the trap shadow of a software-complete insn. 722 */ 723 724 if (get_user(swcr, (unsigned long __user *)buffer)) 725 return -EFAULT; 726 state = ¤t_thread_info()->ieee_state; 727 728 /* Update softare trap enable bits. */ 729 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 730 731 /* Update the real fpcr. */ 732 fpcr = rdfpcr() & FPCR_DYN_MASK; 733 fpcr |= ieee_swcr_to_fpcr(swcr); 734 wrfpcr(fpcr); 735 736 return 0; 737 } 738 739 case SSI_IEEE_RAISE_EXCEPTION: { 740 unsigned long exc, swcr, fpcr, fex; 741 unsigned int *state; 742 743 if (get_user(exc, (unsigned long __user *)buffer)) 744 return -EFAULT; 745 state = ¤t_thread_info()->ieee_state; 746 exc &= IEEE_STATUS_MASK; 747 748 /* Update softare trap enable bits. */ 749 swcr = (*state & IEEE_SW_MASK) | exc; 750 *state |= exc; 751 752 /* Update the real fpcr. */ 753 fpcr = rdfpcr(); 754 fpcr |= ieee_swcr_to_fpcr(swcr); 755 wrfpcr(fpcr); 756 757 /* If any exceptions set by this call, and are unmasked, 758 send a signal. Old exceptions are not signaled. */ 759 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 760 if (fex) { 761 siginfo_t info; 762 int si_code = 0; 763 764 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 765 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 766 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 767 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 768 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 769 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 770 771 info.si_signo = SIGFPE; 772 info.si_errno = 0; 773 info.si_code = si_code; 774 info.si_addr = NULL; /* FIXME */ 775 send_sig_info(SIGFPE, &info, current); 776 } 777 return 0; 778 } 779 780 case SSI_IEEE_STATE_AT_SIGNAL: 781 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 782 /* 783 * Not sure anybody will ever use this weird stuff. These 784 * ops can be used (under OSF/1) to set the fpcr that should 785 * be used when a signal handler starts executing. 786 */ 787 break; 788 789 case SSI_NVPAIRS: { 790 unsigned long v, w, i; 791 unsigned int old, new; 792 793 for (i = 0; i < nbytes; ++i) { 794 795 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 796 return -EFAULT; 797 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 798 return -EFAULT; 799 switch (v) { 800 case SSIN_UACPROC: 801 again: 802 old = current_thread_info()->flags; 803 new = old & ~(UAC_BITMASK << UAC_SHIFT); 804 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 805 if (cmpxchg(¤t_thread_info()->flags, 806 old, new) != old) 807 goto again; 808 break; 809 810 default: 811 return -EOPNOTSUPP; 812 } 813 } 814 return 0; 815 } 816 817 default: 818 break; 819 } 820 821 return -EOPNOTSUPP; 822 } 823 824 /* Translations due to the fact that OSF's time_t is an int. Which 825 affects all sorts of things, like timeval and itimerval. */ 826 827 extern struct timezone sys_tz; 828 829 struct timeval32 830 { 831 int tv_sec, tv_usec; 832 }; 833 834 struct itimerval32 835 { 836 struct timeval32 it_interval; 837 struct timeval32 it_value; 838 }; 839 840 static inline long 841 get_tv32(struct timeval *o, struct timeval32 __user *i) 842 { 843 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 844 (__get_user(o->tv_sec, &i->tv_sec) | 845 __get_user(o->tv_usec, &i->tv_usec))); 846 } 847 848 static inline long 849 put_tv32(struct timeval32 __user *o, struct timeval *i) 850 { 851 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 852 (__put_user(i->tv_sec, &o->tv_sec) | 853 __put_user(i->tv_usec, &o->tv_usec))); 854 } 855 856 static inline long 857 get_it32(struct itimerval *o, struct itimerval32 __user *i) 858 { 859 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 860 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 861 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 862 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 863 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 864 } 865 866 static inline long 867 put_it32(struct itimerval32 __user *o, struct itimerval *i) 868 { 869 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 870 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 871 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 872 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 873 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 874 } 875 876 static inline void 877 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 878 { 879 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 880 value->tv_sec = jiffies / HZ; 881 } 882 883 asmlinkage int 884 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 885 { 886 if (tv) { 887 struct timeval ktv; 888 do_gettimeofday(&ktv); 889 if (put_tv32(tv, &ktv)) 890 return -EFAULT; 891 } 892 if (tz) { 893 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 894 return -EFAULT; 895 } 896 return 0; 897 } 898 899 asmlinkage int 900 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 901 { 902 struct timespec kts; 903 struct timezone ktz; 904 905 if (tv) { 906 if (get_tv32((struct timeval *)&kts, tv)) 907 return -EFAULT; 908 } 909 if (tz) { 910 if (copy_from_user(&ktz, tz, sizeof(*tz))) 911 return -EFAULT; 912 } 913 914 kts.tv_nsec *= 1000; 915 916 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 917 } 918 919 asmlinkage int 920 osf_getitimer(int which, struct itimerval32 __user *it) 921 { 922 struct itimerval kit; 923 int error; 924 925 error = do_getitimer(which, &kit); 926 if (!error && put_it32(it, &kit)) 927 error = -EFAULT; 928 929 return error; 930 } 931 932 asmlinkage int 933 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) 934 { 935 struct itimerval kin, kout; 936 int error; 937 938 if (in) { 939 if (get_it32(&kin, in)) 940 return -EFAULT; 941 } else 942 memset(&kin, 0, sizeof(kin)); 943 944 error = do_setitimer(which, &kin, out ? &kout : NULL); 945 if (error || !out) 946 return error; 947 948 if (put_it32(out, &kout)) 949 return -EFAULT; 950 951 return 0; 952 953 } 954 955 asmlinkage int 956 osf_utimes(char __user *filename, struct timeval32 __user *tvs) 957 { 958 struct timespec tv[2]; 959 960 if (tvs) { 961 struct timeval ktvs[2]; 962 if (get_tv32(&ktvs[0], &tvs[0]) || 963 get_tv32(&ktvs[1], &tvs[1])) 964 return -EFAULT; 965 966 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 967 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 968 return -EINVAL; 969 970 tv[0].tv_sec = ktvs[0].tv_sec; 971 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 972 tv[1].tv_sec = ktvs[1].tv_sec; 973 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 974 } 975 976 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 977 } 978 979 #define MAX_SELECT_SECONDS \ 980 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) 981 982 asmlinkage int 983 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, 984 struct timeval32 __user *tvp) 985 { 986 struct timespec end_time, *to = NULL; 987 if (tvp) { 988 time_t sec, usec; 989 990 to = &end_time; 991 992 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 993 || __get_user(sec, &tvp->tv_sec) 994 || __get_user(usec, &tvp->tv_usec)) { 995 return -EFAULT; 996 } 997 998 if (sec < 0 || usec < 0) 999 return -EINVAL; 1000 1001 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 1002 return -EINVAL; 1003 1004 } 1005 1006 /* OSF does not copy back the remaining time. */ 1007 return core_sys_select(n, inp, outp, exp, to); 1008 } 1009 1010 struct rusage32 { 1011 struct timeval32 ru_utime; /* user time used */ 1012 struct timeval32 ru_stime; /* system time used */ 1013 long ru_maxrss; /* maximum resident set size */ 1014 long ru_ixrss; /* integral shared memory size */ 1015 long ru_idrss; /* integral unshared data size */ 1016 long ru_isrss; /* integral unshared stack size */ 1017 long ru_minflt; /* page reclaims */ 1018 long ru_majflt; /* page faults */ 1019 long ru_nswap; /* swaps */ 1020 long ru_inblock; /* block input operations */ 1021 long ru_oublock; /* block output operations */ 1022 long ru_msgsnd; /* messages sent */ 1023 long ru_msgrcv; /* messages received */ 1024 long ru_nsignals; /* signals received */ 1025 long ru_nvcsw; /* voluntary context switches */ 1026 long ru_nivcsw; /* involuntary " */ 1027 }; 1028 1029 asmlinkage int 1030 osf_getrusage(int who, struct rusage32 __user *ru) 1031 { 1032 struct rusage32 r; 1033 1034 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1035 return -EINVAL; 1036 1037 memset(&r, 0, sizeof(r)); 1038 switch (who) { 1039 case RUSAGE_SELF: 1040 jiffies_to_timeval32(current->utime, &r.ru_utime); 1041 jiffies_to_timeval32(current->stime, &r.ru_stime); 1042 r.ru_minflt = current->min_flt; 1043 r.ru_majflt = current->maj_flt; 1044 break; 1045 case RUSAGE_CHILDREN: 1046 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1047 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1048 r.ru_minflt = current->signal->cmin_flt; 1049 r.ru_majflt = current->signal->cmaj_flt; 1050 break; 1051 } 1052 1053 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1054 } 1055 1056 asmlinkage long 1057 osf_wait4(pid_t pid, int __user *ustatus, int options, 1058 struct rusage32 __user *ur) 1059 { 1060 struct rusage r; 1061 long ret, err; 1062 mm_segment_t old_fs; 1063 1064 if (!ur) 1065 return sys_wait4(pid, ustatus, options, NULL); 1066 1067 old_fs = get_fs(); 1068 1069 set_fs (KERNEL_DS); 1070 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1071 set_fs (old_fs); 1072 1073 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1074 return -EFAULT; 1075 1076 err = 0; 1077 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1078 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1079 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1080 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1081 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1082 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1083 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1084 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1085 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1086 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1087 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1088 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1089 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1090 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1091 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1092 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1093 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1094 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1095 1096 return err ? err : ret; 1097 } 1098 1099 /* 1100 * I don't know what the parameters are: the first one 1101 * seems to be a timeval pointer, and I suspect the second 1102 * one is the time remaining.. Ho humm.. No documentation. 1103 */ 1104 asmlinkage int 1105 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) 1106 { 1107 struct timeval tmp; 1108 unsigned long ticks; 1109 1110 if (get_tv32(&tmp, sleep)) 1111 goto fault; 1112 1113 ticks = timeval_to_jiffies(&tmp); 1114 1115 ticks = schedule_timeout_interruptible(ticks); 1116 1117 if (remain) { 1118 jiffies_to_timeval(ticks, &tmp); 1119 if (put_tv32(remain, &tmp)) 1120 goto fault; 1121 } 1122 1123 return 0; 1124 fault: 1125 return -EFAULT; 1126 } 1127 1128 1129 struct timex32 { 1130 unsigned int modes; /* mode selector */ 1131 long offset; /* time offset (usec) */ 1132 long freq; /* frequency offset (scaled ppm) */ 1133 long maxerror; /* maximum error (usec) */ 1134 long esterror; /* estimated error (usec) */ 1135 int status; /* clock command/status */ 1136 long constant; /* pll time constant */ 1137 long precision; /* clock precision (usec) (read only) */ 1138 long tolerance; /* clock frequency tolerance (ppm) 1139 * (read only) 1140 */ 1141 struct timeval32 time; /* (read only) */ 1142 long tick; /* (modified) usecs between clock ticks */ 1143 1144 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1145 long jitter; /* pps jitter (us) (ro) */ 1146 int shift; /* interval duration (s) (shift) (ro) */ 1147 long stabil; /* pps stability (scaled ppm) (ro) */ 1148 long jitcnt; /* jitter limit exceeded (ro) */ 1149 long calcnt; /* calibration intervals (ro) */ 1150 long errcnt; /* calibration errors (ro) */ 1151 long stbcnt; /* stability limit exceeded (ro) */ 1152 1153 int :32; int :32; int :32; int :32; 1154 int :32; int :32; int :32; int :32; 1155 int :32; int :32; int :32; int :32; 1156 }; 1157 1158 asmlinkage int 1159 sys_old_adjtimex(struct timex32 __user *txc_p) 1160 { 1161 struct timex txc; 1162 int ret; 1163 1164 /* copy relevant bits of struct timex. */ 1165 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1166 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1167 offsetof(struct timex32, time))) 1168 return -EFAULT; 1169 1170 ret = do_adjtimex(&txc); 1171 if (ret < 0) 1172 return ret; 1173 1174 /* copy back to timex32 */ 1175 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1176 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1177 offsetof(struct timex32, tick))) || 1178 (put_tv32(&txc_p->time, &txc.time))) 1179 return -EFAULT; 1180 1181 return ret; 1182 } 1183 1184 /* Get an address range which is currently unmapped. Similar to the 1185 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1186 1187 static unsigned long 1188 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1189 unsigned long limit) 1190 { 1191 struct vm_area_struct *vma = find_vma(current->mm, addr); 1192 1193 while (1) { 1194 /* At this point: (!vma || addr < vma->vm_end). */ 1195 if (limit - len < addr) 1196 return -ENOMEM; 1197 if (!vma || addr + len <= vma->vm_start) 1198 return addr; 1199 addr = vma->vm_end; 1200 vma = vma->vm_next; 1201 } 1202 } 1203 1204 unsigned long 1205 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1206 unsigned long len, unsigned long pgoff, 1207 unsigned long flags) 1208 { 1209 unsigned long limit; 1210 1211 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1212 if (current->personality & ADDR_LIMIT_32BIT) 1213 limit = 0x80000000; 1214 else 1215 limit = TASK_SIZE; 1216 1217 if (len > limit) 1218 return -ENOMEM; 1219 1220 if (flags & MAP_FIXED) 1221 return addr; 1222 1223 /* First, see if the given suggestion fits. 1224 1225 The OSF/1 loader (/sbin/loader) relies on us returning an 1226 address larger than the requested if one exists, which is 1227 a terribly broken way to program. 1228 1229 That said, I can see the use in being able to suggest not 1230 merely specific addresses, but regions of memory -- perhaps 1231 this feature should be incorporated into all ports? */ 1232 1233 if (addr) { 1234 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1235 if (addr != (unsigned long) -ENOMEM) 1236 return addr; 1237 } 1238 1239 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1240 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1241 len, limit); 1242 if (addr != (unsigned long) -ENOMEM) 1243 return addr; 1244 1245 /* Finally, try allocating in low memory. */ 1246 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1247 1248 return addr; 1249 } 1250 1251 #ifdef CONFIG_OSF4_COMPAT 1252 1253 /* Clear top 32 bits of iov_len in the user's buffer for 1254 compatibility with old versions of OSF/1 where iov_len 1255 was defined as int. */ 1256 static int 1257 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1258 { 1259 unsigned long i; 1260 1261 for (i = 0 ; i < count ; i++) { 1262 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1263 1264 if (put_user(0, iov_len_high)) 1265 return -EFAULT; 1266 } 1267 return 0; 1268 } 1269 1270 asmlinkage ssize_t 1271 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1272 { 1273 if (unlikely(personality(current->personality) == PER_OSF4)) 1274 if (osf_fix_iov_len(vector, count)) 1275 return -EFAULT; 1276 return sys_readv(fd, vector, count); 1277 } 1278 1279 asmlinkage ssize_t 1280 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1281 { 1282 if (unlikely(personality(current->personality) == PER_OSF4)) 1283 if (osf_fix_iov_len(vector, count)) 1284 return -EFAULT; 1285 return sys_writev(fd, vector, count); 1286 } 1287 1288 #endif 1289