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/a.out.h> 26 #include <linux/utsname.h> 27 #include <linux/time.h> 28 #include <linux/timex.h> 29 #include <linux/major.h> 30 #include <linux/stat.h> 31 #include <linux/mman.h> 32 #include <linux/shm.h> 33 #include <linux/poll.h> 34 #include <linux/file.h> 35 #include <linux/types.h> 36 #include <linux/ipc.h> 37 #include <linux/namei.h> 38 #include <linux/uio.h> 39 #include <linux/vfs.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 #define ROUND_UP(x) (((x)+3) & ~3) 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 ino_t 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 = ROUND_UP(NAME_OFFSET + namlen + 1); 118 119 buf->error = -EINVAL; /* only used if we fail */ 120 if (reclen > buf->count) 121 return -EINVAL; 122 if (buf->basep) { 123 if (put_user(offset, buf->basep)) 124 return -EFAULT; 125 buf->basep = NULL; 126 } 127 dirent = buf->dirent; 128 put_user(ino, &dirent->d_ino); 129 put_user(namlen, &dirent->d_namlen); 130 put_user(reclen, &dirent->d_reclen); 131 if (copy_to_user(dirent->d_name, name, namlen) || 132 put_user(0, dirent->d_name + namlen)) 133 return -EFAULT; 134 dirent = (void __user *)dirent + reclen; 135 buf->dirent = dirent; 136 buf->count -= reclen; 137 return 0; 138 } 139 140 asmlinkage int 141 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, 142 unsigned int count, long __user *basep) 143 { 144 int error; 145 struct file *file; 146 struct osf_dirent_callback buf; 147 148 error = -EBADF; 149 file = fget(fd); 150 if (!file) 151 goto out; 152 153 buf.dirent = dirent; 154 buf.basep = basep; 155 buf.count = count; 156 buf.error = 0; 157 158 error = vfs_readdir(file, osf_filldir, &buf); 159 if (error < 0) 160 goto out_putf; 161 162 error = buf.error; 163 if (count != buf.count) 164 error = count - buf.count; 165 166 out_putf: 167 fput(file); 168 out: 169 return error; 170 } 171 172 #undef ROUND_UP 173 #undef NAME_OFFSET 174 175 asmlinkage unsigned long 176 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, 177 unsigned long flags, unsigned long fd, unsigned long off) 178 { 179 struct file *file = NULL; 180 unsigned long ret = -EBADF; 181 182 #if 0 183 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 184 printk("%s: unimplemented OSF mmap flags %04lx\n", 185 current->comm, flags); 186 #endif 187 if (!(flags & MAP_ANONYMOUS)) { 188 file = fget(fd); 189 if (!file) 190 goto out; 191 } 192 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); 193 down_write(¤t->mm->mmap_sem); 194 ret = do_mmap(file, addr, len, prot, flags, off); 195 up_write(¤t->mm->mmap_sem); 196 if (file) 197 fput(file); 198 out: 199 return ret; 200 } 201 202 203 /* 204 * The OSF/1 statfs structure is much larger, but this should 205 * match the beginning, at least. 206 */ 207 struct osf_statfs { 208 short f_type; 209 short f_flags; 210 int f_fsize; 211 int f_bsize; 212 int f_blocks; 213 int f_bfree; 214 int f_bavail; 215 int f_files; 216 int f_ffree; 217 __kernel_fsid_t f_fsid; 218 }; 219 220 static int 221 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 222 unsigned long bufsiz) 223 { 224 struct osf_statfs tmp_stat; 225 226 tmp_stat.f_type = linux_stat->f_type; 227 tmp_stat.f_flags = 0; /* mount flags */ 228 tmp_stat.f_fsize = linux_stat->f_frsize; 229 tmp_stat.f_bsize = linux_stat->f_bsize; 230 tmp_stat.f_blocks = linux_stat->f_blocks; 231 tmp_stat.f_bfree = linux_stat->f_bfree; 232 tmp_stat.f_bavail = linux_stat->f_bavail; 233 tmp_stat.f_files = linux_stat->f_files; 234 tmp_stat.f_ffree = linux_stat->f_ffree; 235 tmp_stat.f_fsid = linux_stat->f_fsid; 236 if (bufsiz > sizeof(tmp_stat)) 237 bufsiz = sizeof(tmp_stat); 238 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 239 } 240 241 static int 242 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, 243 unsigned long bufsiz) 244 { 245 struct kstatfs linux_stat; 246 int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat); 247 if (!error) 248 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 249 return error; 250 } 251 252 asmlinkage int 253 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz) 254 { 255 struct nameidata nd; 256 int retval; 257 258 retval = user_path_walk(path, &nd); 259 if (!retval) { 260 retval = do_osf_statfs(nd.dentry, buffer, bufsiz); 261 path_release(&nd); 262 } 263 return retval; 264 } 265 266 asmlinkage int 267 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) 268 { 269 struct file *file; 270 int retval; 271 272 retval = -EBADF; 273 file = fget(fd); 274 if (file) { 275 retval = do_osf_statfs(file->f_dentry, buffer, bufsiz); 276 fput(file); 277 } 278 return retval; 279 } 280 281 /* 282 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 283 * 284 * Although to be frank, neither are the native Linux/i386 ones.. 285 */ 286 struct ufs_args { 287 char __user *devname; 288 int flags; 289 uid_t exroot; 290 }; 291 292 struct cdfs_args { 293 char __user *devname; 294 int flags; 295 uid_t exroot; 296 297 /* This has lots more here, which Linux handles with the option block 298 but I'm too lazy to do the translation into ASCII. */ 299 }; 300 301 struct procfs_args { 302 char __user *devname; 303 int flags; 304 uid_t exroot; 305 }; 306 307 /* 308 * We can't actually handle ufs yet, so we translate UFS mounts to 309 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 310 * layout is so braindead it's a major headache doing it. 311 * 312 * Just how long ago was it written? OTOH our UFS driver may be still 313 * unhappy with OSF UFS. [CHECKME] 314 */ 315 static int 316 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 317 { 318 int retval; 319 struct cdfs_args tmp; 320 char *devname; 321 322 retval = -EFAULT; 323 if (copy_from_user(&tmp, args, sizeof(tmp))) 324 goto out; 325 devname = getname(tmp.devname); 326 retval = PTR_ERR(devname); 327 if (IS_ERR(devname)) 328 goto out; 329 retval = do_mount(devname, dirname, "ext2", flags, NULL); 330 putname(devname); 331 out: 332 return retval; 333 } 334 335 static int 336 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 337 { 338 int retval; 339 struct cdfs_args tmp; 340 char *devname; 341 342 retval = -EFAULT; 343 if (copy_from_user(&tmp, args, sizeof(tmp))) 344 goto out; 345 devname = getname(tmp.devname); 346 retval = PTR_ERR(devname); 347 if (IS_ERR(devname)) 348 goto out; 349 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 350 putname(devname); 351 out: 352 return retval; 353 } 354 355 static int 356 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 357 { 358 struct procfs_args tmp; 359 360 if (copy_from_user(&tmp, args, sizeof(tmp))) 361 return -EFAULT; 362 363 return do_mount("", dirname, "proc", flags, NULL); 364 } 365 366 asmlinkage int 367 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) 368 { 369 int retval = -EINVAL; 370 char *name; 371 372 lock_kernel(); 373 374 name = getname(path); 375 retval = PTR_ERR(name); 376 if (IS_ERR(name)) 377 goto out; 378 switch (typenr) { 379 case 1: 380 retval = osf_ufs_mount(name, data, flag); 381 break; 382 case 6: 383 retval = osf_cdfs_mount(name, data, flag); 384 break; 385 case 9: 386 retval = osf_procfs_mount(name, data, flag); 387 break; 388 default: 389 printk("osf_mount(%ld, %x)\n", typenr, flag); 390 } 391 putname(name); 392 out: 393 unlock_kernel(); 394 return retval; 395 } 396 397 asmlinkage int 398 osf_utsname(char __user *name) 399 { 400 int error; 401 402 down_read(&uts_sem); 403 error = -EFAULT; 404 if (copy_to_user(name + 0, system_utsname.sysname, 32)) 405 goto out; 406 if (copy_to_user(name + 32, system_utsname.nodename, 32)) 407 goto out; 408 if (copy_to_user(name + 64, system_utsname.release, 32)) 409 goto out; 410 if (copy_to_user(name + 96, system_utsname.version, 32)) 411 goto out; 412 if (copy_to_user(name + 128, system_utsname.machine, 32)) 413 goto out; 414 415 error = 0; 416 out: 417 up_read(&uts_sem); 418 return error; 419 } 420 421 asmlinkage unsigned long 422 sys_getpagesize(void) 423 { 424 return PAGE_SIZE; 425 } 426 427 asmlinkage unsigned long 428 sys_getdtablesize(void) 429 { 430 return NR_OPEN; 431 } 432 433 /* 434 * For compatibility with OSF/1 only. Use utsname(2) instead. 435 */ 436 asmlinkage int 437 osf_getdomainname(char __user *name, int namelen) 438 { 439 unsigned len; 440 int i; 441 442 if (!access_ok(VERIFY_WRITE, name, namelen)) 443 return -EFAULT; 444 445 len = namelen; 446 if (namelen > 32) 447 len = 32; 448 449 down_read(&uts_sem); 450 for (i = 0; i < len; ++i) { 451 __put_user(system_utsname.domainname[i], name + i); 452 if (system_utsname.domainname[i] == '\0') 453 break; 454 } 455 up_read(&uts_sem); 456 457 return 0; 458 } 459 460 /* 461 * The following stuff should move into a header file should it ever 462 * be labeled "officially supported." Right now, there is just enough 463 * support to avoid applications (such as tar) printing error 464 * messages. The attributes are not really implemented. 465 */ 466 467 /* 468 * Values for Property list entry flag 469 */ 470 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 471 by default */ 472 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 473 #define PLE_FLAG_ALL -1 /* All flag value */ 474 475 struct proplistname_args { 476 unsigned int pl_mask; 477 unsigned int pl_numnames; 478 char **pl_names; 479 }; 480 481 union pl_args { 482 struct setargs { 483 char __user *path; 484 long follow; 485 long nbytes; 486 char __user *buf; 487 } set; 488 struct fsetargs { 489 long fd; 490 long nbytes; 491 char __user *buf; 492 } fset; 493 struct getargs { 494 char __user *path; 495 long follow; 496 struct proplistname_args __user *name_args; 497 long nbytes; 498 char __user *buf; 499 int __user *min_buf_size; 500 } get; 501 struct fgetargs { 502 long fd; 503 struct proplistname_args __user *name_args; 504 long nbytes; 505 char __user *buf; 506 int __user *min_buf_size; 507 } fget; 508 struct delargs { 509 char __user *path; 510 long follow; 511 struct proplistname_args __user *name_args; 512 } del; 513 struct fdelargs { 514 long fd; 515 struct proplistname_args __user *name_args; 516 } fdel; 517 }; 518 519 enum pl_code { 520 PL_SET = 1, PL_FSET = 2, 521 PL_GET = 3, PL_FGET = 4, 522 PL_DEL = 5, PL_FDEL = 6 523 }; 524 525 asmlinkage long 526 osf_proplist_syscall(enum pl_code code, union pl_args __user *args) 527 { 528 long error; 529 int __user *min_buf_size_ptr; 530 531 lock_kernel(); 532 switch (code) { 533 case PL_SET: 534 if (get_user(error, &args->set.nbytes)) 535 error = -EFAULT; 536 break; 537 case PL_FSET: 538 if (get_user(error, &args->fset.nbytes)) 539 error = -EFAULT; 540 break; 541 case PL_GET: 542 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 543 if (error) 544 break; 545 error = put_user(0, min_buf_size_ptr); 546 break; 547 case PL_FGET: 548 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 549 if (error) 550 break; 551 error = put_user(0, min_buf_size_ptr); 552 break; 553 case PL_DEL: 554 case PL_FDEL: 555 error = 0; 556 break; 557 default: 558 error = -EOPNOTSUPP; 559 break; 560 }; 561 unlock_kernel(); 562 return error; 563 } 564 565 asmlinkage int 566 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) 567 { 568 unsigned long usp = rdusp(); 569 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 570 unsigned long oss_os = on_sig_stack(usp); 571 int error; 572 573 if (uss) { 574 void __user *ss_sp; 575 576 error = -EFAULT; 577 if (get_user(ss_sp, &uss->ss_sp)) 578 goto out; 579 580 /* If the current stack was set with sigaltstack, don't 581 swap stacks while we are on it. */ 582 error = -EPERM; 583 if (current->sas_ss_sp && on_sig_stack(usp)) 584 goto out; 585 586 /* Since we don't know the extent of the stack, and we don't 587 track onstack-ness, but rather calculate it, we must 588 presume a size. Ho hum this interface is lossy. */ 589 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 590 current->sas_ss_size = SIGSTKSZ; 591 } 592 593 if (uoss) { 594 error = -EFAULT; 595 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 596 || __put_user(oss_sp, &uoss->ss_sp) 597 || __put_user(oss_os, &uoss->ss_onstack)) 598 goto out; 599 } 600 601 error = 0; 602 out: 603 return error; 604 } 605 606 asmlinkage long 607 osf_sysinfo(int command, char __user *buf, long count) 608 { 609 static char * sysinfo_table[] = { 610 system_utsname.sysname, 611 system_utsname.nodename, 612 system_utsname.release, 613 system_utsname.version, 614 system_utsname.machine, 615 "alpha", /* instruction set architecture */ 616 "dummy", /* hardware serial number */ 617 "dummy", /* hardware manufacturer */ 618 "dummy", /* secure RPC domain */ 619 }; 620 unsigned long offset; 621 char *res; 622 long len, err = -EINVAL; 623 624 offset = command-1; 625 if (offset >= sizeof(sysinfo_table)/sizeof(char *)) { 626 /* Digital UNIX has a few unpublished interfaces here */ 627 printk("sysinfo(%d)", command); 628 goto out; 629 } 630 631 down_read(&uts_sem); 632 res = sysinfo_table[offset]; 633 len = strlen(res)+1; 634 if (len > count) 635 len = count; 636 if (copy_to_user(buf, res, len)) 637 err = -EFAULT; 638 else 639 err = 0; 640 up_read(&uts_sem); 641 out: 642 return err; 643 } 644 645 asmlinkage unsigned long 646 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 647 int __user *start, void __user *arg) 648 { 649 unsigned long w; 650 struct percpu_struct *cpu; 651 652 switch (op) { 653 case GSI_IEEE_FP_CONTROL: 654 /* Return current software fp control & status bits. */ 655 /* Note that DU doesn't verify available space here. */ 656 657 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 658 w = swcr_update_status(w, rdfpcr()); 659 if (put_user(w, (unsigned long __user *) buffer)) 660 return -EFAULT; 661 return 0; 662 663 case GSI_IEEE_STATE_AT_SIGNAL: 664 /* 665 * Not sure anybody will ever use this weird stuff. These 666 * ops can be used (under OSF/1) to set the fpcr that should 667 * be used when a signal handler starts executing. 668 */ 669 break; 670 671 case GSI_UACPROC: 672 if (nbytes < sizeof(unsigned int)) 673 return -EINVAL; 674 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 675 if (put_user(w, (unsigned int __user *)buffer)) 676 return -EFAULT; 677 return 1; 678 679 case GSI_PROC_TYPE: 680 if (nbytes < sizeof(unsigned long)) 681 return -EINVAL; 682 cpu = (struct percpu_struct*) 683 ((char*)hwrpb + hwrpb->processor_offset); 684 w = cpu->type; 685 if (put_user(w, (unsigned long __user*)buffer)) 686 return -EFAULT; 687 return 1; 688 689 case GSI_GET_HWRPB: 690 if (nbytes < sizeof(*hwrpb)) 691 return -EINVAL; 692 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 693 return -EFAULT; 694 return 1; 695 696 default: 697 break; 698 } 699 700 return -EOPNOTSUPP; 701 } 702 703 asmlinkage unsigned long 704 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 705 int __user *start, void __user *arg) 706 { 707 switch (op) { 708 case SSI_IEEE_FP_CONTROL: { 709 unsigned long swcr, fpcr; 710 unsigned int *state; 711 712 /* 713 * Alpha Architecture Handbook 4.7.7.3: 714 * To be fully IEEE compiant, we must track the current IEEE 715 * exception state in software, because spurrious bits can be 716 * set in the trap shadow of a software-complete insn. 717 */ 718 719 if (get_user(swcr, (unsigned long __user *)buffer)) 720 return -EFAULT; 721 state = ¤t_thread_info()->ieee_state; 722 723 /* Update softare trap enable bits. */ 724 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 725 726 /* Update the real fpcr. */ 727 fpcr = rdfpcr() & FPCR_DYN_MASK; 728 fpcr |= ieee_swcr_to_fpcr(swcr); 729 wrfpcr(fpcr); 730 731 return 0; 732 } 733 734 case SSI_IEEE_RAISE_EXCEPTION: { 735 unsigned long exc, swcr, fpcr, fex; 736 unsigned int *state; 737 738 if (get_user(exc, (unsigned long __user *)buffer)) 739 return -EFAULT; 740 state = ¤t_thread_info()->ieee_state; 741 exc &= IEEE_STATUS_MASK; 742 743 /* Update softare trap enable bits. */ 744 swcr = (*state & IEEE_SW_MASK) | exc; 745 *state |= exc; 746 747 /* Update the real fpcr. */ 748 fpcr = rdfpcr(); 749 fpcr |= ieee_swcr_to_fpcr(swcr); 750 wrfpcr(fpcr); 751 752 /* If any exceptions set by this call, and are unmasked, 753 send a signal. Old exceptions are not signaled. */ 754 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 755 if (fex) { 756 siginfo_t info; 757 int si_code = 0; 758 759 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 760 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 761 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 762 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 763 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 764 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 765 766 info.si_signo = SIGFPE; 767 info.si_errno = 0; 768 info.si_code = si_code; 769 info.si_addr = NULL; /* FIXME */ 770 send_sig_info(SIGFPE, &info, current); 771 } 772 return 0; 773 } 774 775 case SSI_IEEE_STATE_AT_SIGNAL: 776 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 777 /* 778 * Not sure anybody will ever use this weird stuff. These 779 * ops can be used (under OSF/1) to set the fpcr that should 780 * be used when a signal handler starts executing. 781 */ 782 break; 783 784 case SSI_NVPAIRS: { 785 unsigned long v, w, i; 786 unsigned int old, new; 787 788 for (i = 0; i < nbytes; ++i) { 789 790 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 791 return -EFAULT; 792 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 793 return -EFAULT; 794 switch (v) { 795 case SSIN_UACPROC: 796 again: 797 old = current_thread_info()->flags; 798 new = old & ~(UAC_BITMASK << UAC_SHIFT); 799 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 800 if (cmpxchg(¤t_thread_info()->flags, 801 old, new) != old) 802 goto again; 803 break; 804 805 default: 806 return -EOPNOTSUPP; 807 } 808 } 809 return 0; 810 } 811 812 default: 813 break; 814 } 815 816 return -EOPNOTSUPP; 817 } 818 819 /* Translations due to the fact that OSF's time_t is an int. Which 820 affects all sorts of things, like timeval and itimerval. */ 821 822 extern struct timezone sys_tz; 823 extern int do_adjtimex(struct timex *); 824 825 struct timeval32 826 { 827 int tv_sec, tv_usec; 828 }; 829 830 struct itimerval32 831 { 832 struct timeval32 it_interval; 833 struct timeval32 it_value; 834 }; 835 836 static inline long 837 get_tv32(struct timeval *o, struct timeval32 __user *i) 838 { 839 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 840 (__get_user(o->tv_sec, &i->tv_sec) | 841 __get_user(o->tv_usec, &i->tv_usec))); 842 } 843 844 static inline long 845 put_tv32(struct timeval32 __user *o, struct timeval *i) 846 { 847 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 848 (__put_user(i->tv_sec, &o->tv_sec) | 849 __put_user(i->tv_usec, &o->tv_usec))); 850 } 851 852 static inline long 853 get_it32(struct itimerval *o, struct itimerval32 __user *i) 854 { 855 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 856 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 857 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 858 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 859 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 860 } 861 862 static inline long 863 put_it32(struct itimerval32 __user *o, struct itimerval *i) 864 { 865 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 866 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 867 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 868 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 869 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 870 } 871 872 static inline void 873 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 874 { 875 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 876 value->tv_sec = jiffies / HZ; 877 } 878 879 asmlinkage int 880 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 881 { 882 if (tv) { 883 struct timeval ktv; 884 do_gettimeofday(&ktv); 885 if (put_tv32(tv, &ktv)) 886 return -EFAULT; 887 } 888 if (tz) { 889 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 890 return -EFAULT; 891 } 892 return 0; 893 } 894 895 asmlinkage int 896 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 897 { 898 struct timespec kts; 899 struct timezone ktz; 900 901 if (tv) { 902 if (get_tv32((struct timeval *)&kts, tv)) 903 return -EFAULT; 904 } 905 if (tz) { 906 if (copy_from_user(&ktz, tz, sizeof(*tz))) 907 return -EFAULT; 908 } 909 910 kts.tv_nsec *= 1000; 911 912 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 913 } 914 915 asmlinkage int 916 osf_getitimer(int which, struct itimerval32 __user *it) 917 { 918 struct itimerval kit; 919 int error; 920 921 error = do_getitimer(which, &kit); 922 if (!error && put_it32(it, &kit)) 923 error = -EFAULT; 924 925 return error; 926 } 927 928 asmlinkage int 929 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) 930 { 931 struct itimerval kin, kout; 932 int error; 933 934 if (in) { 935 if (get_it32(&kin, in)) 936 return -EFAULT; 937 } else 938 memset(&kin, 0, sizeof(kin)); 939 940 error = do_setitimer(which, &kin, out ? &kout : NULL); 941 if (error || !out) 942 return error; 943 944 if (put_it32(out, &kout)) 945 return -EFAULT; 946 947 return 0; 948 949 } 950 951 asmlinkage int 952 osf_utimes(char __user *filename, struct timeval32 __user *tvs) 953 { 954 struct timeval ktvs[2]; 955 956 if (tvs) { 957 if (get_tv32(&ktvs[0], &tvs[0]) || 958 get_tv32(&ktvs[1], &tvs[1])) 959 return -EFAULT; 960 } 961 962 return do_utimes(filename, tvs ? ktvs : NULL); 963 } 964 965 #define MAX_SELECT_SECONDS \ 966 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) 967 968 asmlinkage int 969 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, 970 struct timeval32 __user *tvp) 971 { 972 fd_set_bits fds; 973 char *bits; 974 size_t size; 975 long timeout; 976 int ret = -EINVAL; 977 978 timeout = MAX_SCHEDULE_TIMEOUT; 979 if (tvp) { 980 time_t sec, usec; 981 982 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 983 || __get_user(sec, &tvp->tv_sec) 984 || __get_user(usec, &tvp->tv_usec)) { 985 ret = -EFAULT; 986 goto out_nofds; 987 } 988 989 if (sec < 0 || usec < 0) 990 goto out_nofds; 991 992 if ((unsigned long) sec < MAX_SELECT_SECONDS) { 993 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); 994 timeout += sec * (unsigned long) HZ; 995 } 996 } 997 998 if (n < 0 || n > current->files->max_fdset) 999 goto out_nofds; 1000 1001 /* 1002 * We need 6 bitmaps (in/out/ex for both incoming and outgoing), 1003 * since we used fdset we need to allocate memory in units of 1004 * long-words. 1005 */ 1006 ret = -ENOMEM; 1007 size = FDS_BYTES(n); 1008 bits = kmalloc(6 * size, GFP_KERNEL); 1009 if (!bits) 1010 goto out_nofds; 1011 fds.in = (unsigned long *) bits; 1012 fds.out = (unsigned long *) (bits + size); 1013 fds.ex = (unsigned long *) (bits + 2*size); 1014 fds.res_in = (unsigned long *) (bits + 3*size); 1015 fds.res_out = (unsigned long *) (bits + 4*size); 1016 fds.res_ex = (unsigned long *) (bits + 5*size); 1017 1018 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || 1019 (ret = get_fd_set(n, outp->fds_bits, fds.out)) || 1020 (ret = get_fd_set(n, exp->fds_bits, fds.ex))) 1021 goto out; 1022 zero_fd_set(n, fds.res_in); 1023 zero_fd_set(n, fds.res_out); 1024 zero_fd_set(n, fds.res_ex); 1025 1026 ret = do_select(n, &fds, &timeout); 1027 1028 /* OSF does not copy back the remaining time. */ 1029 1030 if (ret < 0) 1031 goto out; 1032 if (!ret) { 1033 ret = -ERESTARTNOHAND; 1034 if (signal_pending(current)) 1035 goto out; 1036 ret = 0; 1037 } 1038 1039 if (set_fd_set(n, inp->fds_bits, fds.res_in) || 1040 set_fd_set(n, outp->fds_bits, fds.res_out) || 1041 set_fd_set(n, exp->fds_bits, fds.res_ex)) 1042 ret = -EFAULT; 1043 1044 out: 1045 kfree(bits); 1046 out_nofds: 1047 return ret; 1048 } 1049 1050 struct rusage32 { 1051 struct timeval32 ru_utime; /* user time used */ 1052 struct timeval32 ru_stime; /* system time used */ 1053 long ru_maxrss; /* maximum resident set size */ 1054 long ru_ixrss; /* integral shared memory size */ 1055 long ru_idrss; /* integral unshared data size */ 1056 long ru_isrss; /* integral unshared stack size */ 1057 long ru_minflt; /* page reclaims */ 1058 long ru_majflt; /* page faults */ 1059 long ru_nswap; /* swaps */ 1060 long ru_inblock; /* block input operations */ 1061 long ru_oublock; /* block output operations */ 1062 long ru_msgsnd; /* messages sent */ 1063 long ru_msgrcv; /* messages received */ 1064 long ru_nsignals; /* signals received */ 1065 long ru_nvcsw; /* voluntary context switches */ 1066 long ru_nivcsw; /* involuntary " */ 1067 }; 1068 1069 asmlinkage int 1070 osf_getrusage(int who, struct rusage32 __user *ru) 1071 { 1072 struct rusage32 r; 1073 1074 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1075 return -EINVAL; 1076 1077 memset(&r, 0, sizeof(r)); 1078 switch (who) { 1079 case RUSAGE_SELF: 1080 jiffies_to_timeval32(current->utime, &r.ru_utime); 1081 jiffies_to_timeval32(current->stime, &r.ru_stime); 1082 r.ru_minflt = current->min_flt; 1083 r.ru_majflt = current->maj_flt; 1084 break; 1085 case RUSAGE_CHILDREN: 1086 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1087 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1088 r.ru_minflt = current->signal->cmin_flt; 1089 r.ru_majflt = current->signal->cmaj_flt; 1090 break; 1091 } 1092 1093 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1094 } 1095 1096 asmlinkage long 1097 osf_wait4(pid_t pid, int __user *ustatus, int options, 1098 struct rusage32 __user *ur) 1099 { 1100 struct rusage r; 1101 long ret, err; 1102 mm_segment_t old_fs; 1103 1104 if (!ur) 1105 return sys_wait4(pid, ustatus, options, NULL); 1106 1107 old_fs = get_fs(); 1108 1109 set_fs (KERNEL_DS); 1110 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1111 set_fs (old_fs); 1112 1113 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1114 return -EFAULT; 1115 1116 err = 0; 1117 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1118 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1119 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1120 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1121 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1122 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1123 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1124 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1125 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1126 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1127 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1128 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1129 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1130 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1131 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1132 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1133 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1134 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1135 1136 return err ? err : ret; 1137 } 1138 1139 /* 1140 * I don't know what the parameters are: the first one 1141 * seems to be a timeval pointer, and I suspect the second 1142 * one is the time remaining.. Ho humm.. No documentation. 1143 */ 1144 asmlinkage int 1145 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) 1146 { 1147 struct timeval tmp; 1148 unsigned long ticks; 1149 1150 if (get_tv32(&tmp, sleep)) 1151 goto fault; 1152 1153 ticks = timeval_to_jiffies(&tmp); 1154 1155 current->state = TASK_INTERRUPTIBLE; 1156 ticks = schedule_timeout(ticks); 1157 1158 if (remain) { 1159 jiffies_to_timeval(ticks, &tmp); 1160 if (put_tv32(remain, &tmp)) 1161 goto fault; 1162 } 1163 1164 return 0; 1165 fault: 1166 return -EFAULT; 1167 } 1168 1169 1170 struct timex32 { 1171 unsigned int modes; /* mode selector */ 1172 long offset; /* time offset (usec) */ 1173 long freq; /* frequency offset (scaled ppm) */ 1174 long maxerror; /* maximum error (usec) */ 1175 long esterror; /* estimated error (usec) */ 1176 int status; /* clock command/status */ 1177 long constant; /* pll time constant */ 1178 long precision; /* clock precision (usec) (read only) */ 1179 long tolerance; /* clock frequency tolerance (ppm) 1180 * (read only) 1181 */ 1182 struct timeval32 time; /* (read only) */ 1183 long tick; /* (modified) usecs between clock ticks */ 1184 1185 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1186 long jitter; /* pps jitter (us) (ro) */ 1187 int shift; /* interval duration (s) (shift) (ro) */ 1188 long stabil; /* pps stability (scaled ppm) (ro) */ 1189 long jitcnt; /* jitter limit exceeded (ro) */ 1190 long calcnt; /* calibration intervals (ro) */ 1191 long errcnt; /* calibration errors (ro) */ 1192 long stbcnt; /* stability limit exceeded (ro) */ 1193 1194 int :32; int :32; int :32; int :32; 1195 int :32; int :32; int :32; int :32; 1196 int :32; int :32; int :32; int :32; 1197 }; 1198 1199 asmlinkage int 1200 sys_old_adjtimex(struct timex32 __user *txc_p) 1201 { 1202 struct timex txc; 1203 int ret; 1204 1205 /* copy relevant bits of struct timex. */ 1206 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1207 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1208 offsetof(struct timex32, time))) 1209 return -EFAULT; 1210 1211 ret = do_adjtimex(&txc); 1212 if (ret < 0) 1213 return ret; 1214 1215 /* copy back to timex32 */ 1216 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1217 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1218 offsetof(struct timex32, tick))) || 1219 (put_tv32(&txc_p->time, &txc.time))) 1220 return -EFAULT; 1221 1222 return ret; 1223 } 1224 1225 /* Get an address range which is currently unmapped. Similar to the 1226 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1227 1228 static unsigned long 1229 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1230 unsigned long limit) 1231 { 1232 struct vm_area_struct *vma = find_vma(current->mm, addr); 1233 1234 while (1) { 1235 /* At this point: (!vma || addr < vma->vm_end). */ 1236 if (limit - len < addr) 1237 return -ENOMEM; 1238 if (!vma || addr + len <= vma->vm_start) 1239 return addr; 1240 addr = vma->vm_end; 1241 vma = vma->vm_next; 1242 } 1243 } 1244 1245 unsigned long 1246 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1247 unsigned long len, unsigned long pgoff, 1248 unsigned long flags) 1249 { 1250 unsigned long limit; 1251 1252 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1253 if (current->personality & ADDR_LIMIT_32BIT) 1254 limit = 0x80000000; 1255 else 1256 limit = TASK_SIZE; 1257 1258 if (len > limit) 1259 return -ENOMEM; 1260 1261 /* First, see if the given suggestion fits. 1262 1263 The OSF/1 loader (/sbin/loader) relies on us returning an 1264 address larger than the requested if one exists, which is 1265 a terribly broken way to program. 1266 1267 That said, I can see the use in being able to suggest not 1268 merely specific addresses, but regions of memory -- perhaps 1269 this feature should be incorporated into all ports? */ 1270 1271 if (addr) { 1272 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1273 if (addr != (unsigned long) -ENOMEM) 1274 return addr; 1275 } 1276 1277 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1278 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1279 len, limit); 1280 if (addr != (unsigned long) -ENOMEM) 1281 return addr; 1282 1283 /* Finally, try allocating in low memory. */ 1284 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1285 1286 return addr; 1287 } 1288 1289 #ifdef CONFIG_OSF4_COMPAT 1290 1291 /* Clear top 32 bits of iov_len in the user's buffer for 1292 compatibility with old versions of OSF/1 where iov_len 1293 was defined as int. */ 1294 static int 1295 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1296 { 1297 unsigned long i; 1298 1299 for (i = 0 ; i < count ; i++) { 1300 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1301 1302 if (put_user(0, iov_len_high)) 1303 return -EFAULT; 1304 } 1305 return 0; 1306 } 1307 1308 asmlinkage ssize_t 1309 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1310 { 1311 if (unlikely(personality(current->personality) == PER_OSF4)) 1312 if (osf_fix_iov_len(vector, count)) 1313 return -EFAULT; 1314 return sys_readv(fd, vector, count); 1315 } 1316 1317 asmlinkage ssize_t 1318 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1319 { 1320 if (unlikely(personality(current->personality) == PER_OSF4)) 1321 if (osf_fix_iov_len(vector, count)) 1322 return -EFAULT; 1323 return sys_writev(fd, vector, count); 1324 } 1325 1326 #endif 1327