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 #include <linux/rcupdate.h> 41 42 #include <asm/fpu.h> 43 #include <asm/io.h> 44 #include <asm/uaccess.h> 45 #include <asm/system.h> 46 #include <asm/sysinfo.h> 47 #include <asm/hwrpb.h> 48 #include <asm/processor.h> 49 50 extern int do_pipe(int *); 51 52 /* 53 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 54 * which OSF programs just shouldn't be doing. We're still not quite 55 * identical to OSF as we don't return 0 on success, but doing otherwise 56 * would require changes to libc. Hopefully this is good enough. 57 */ 58 asmlinkage unsigned long 59 osf_brk(unsigned long brk) 60 { 61 unsigned long retval = sys_brk(brk); 62 if (brk && brk != retval) 63 retval = -ENOMEM; 64 return retval; 65 } 66 67 /* 68 * This is pure guess-work.. 69 */ 70 asmlinkage int 71 osf_set_program_attributes(unsigned long text_start, unsigned long text_len, 72 unsigned long bss_start, unsigned long bss_len) 73 { 74 struct mm_struct *mm; 75 76 lock_kernel(); 77 mm = current->mm; 78 mm->end_code = 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 return -EOVERFLOW; 126 if (buf->basep) { 127 if (put_user(offset, buf->basep)) 128 return -EFAULT; 129 buf->basep = NULL; 130 } 131 dirent = buf->dirent; 132 put_user(d_ino, &dirent->d_ino); 133 put_user(namlen, &dirent->d_namlen); 134 put_user(reclen, &dirent->d_reclen); 135 if (copy_to_user(dirent->d_name, name, namlen) || 136 put_user(0, dirent->d_name + namlen)) 137 return -EFAULT; 138 dirent = (void __user *)dirent + reclen; 139 buf->dirent = dirent; 140 buf->count -= reclen; 141 return 0; 142 } 143 144 asmlinkage int 145 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, 146 unsigned int count, long __user *basep) 147 { 148 int error; 149 struct file *file; 150 struct osf_dirent_callback buf; 151 152 error = -EBADF; 153 file = fget(fd); 154 if (!file) 155 goto out; 156 157 buf.dirent = dirent; 158 buf.basep = basep; 159 buf.count = count; 160 buf.error = 0; 161 162 error = vfs_readdir(file, osf_filldir, &buf); 163 if (error < 0) 164 goto out_putf; 165 166 error = buf.error; 167 if (count != buf.count) 168 error = count - buf.count; 169 170 out_putf: 171 fput(file); 172 out: 173 return error; 174 } 175 176 #undef NAME_OFFSET 177 178 asmlinkage unsigned long 179 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, 180 unsigned long flags, unsigned long fd, unsigned long off) 181 { 182 struct file *file = NULL; 183 unsigned long ret = -EBADF; 184 185 #if 0 186 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 187 printk("%s: unimplemented OSF mmap flags %04lx\n", 188 current->comm, flags); 189 #endif 190 if (!(flags & MAP_ANONYMOUS)) { 191 file = fget(fd); 192 if (!file) 193 goto out; 194 } 195 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); 196 down_write(¤t->mm->mmap_sem); 197 ret = do_mmap(file, addr, len, prot, flags, off); 198 up_write(¤t->mm->mmap_sem); 199 if (file) 200 fput(file); 201 out: 202 return ret; 203 } 204 205 206 /* 207 * The OSF/1 statfs structure is much larger, but this should 208 * match the beginning, at least. 209 */ 210 struct osf_statfs { 211 short f_type; 212 short f_flags; 213 int f_fsize; 214 int f_bsize; 215 int f_blocks; 216 int f_bfree; 217 int f_bavail; 218 int f_files; 219 int f_ffree; 220 __kernel_fsid_t f_fsid; 221 }; 222 223 static int 224 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 225 unsigned long bufsiz) 226 { 227 struct osf_statfs tmp_stat; 228 229 tmp_stat.f_type = linux_stat->f_type; 230 tmp_stat.f_flags = 0; /* mount flags */ 231 tmp_stat.f_fsize = linux_stat->f_frsize; 232 tmp_stat.f_bsize = linux_stat->f_bsize; 233 tmp_stat.f_blocks = linux_stat->f_blocks; 234 tmp_stat.f_bfree = linux_stat->f_bfree; 235 tmp_stat.f_bavail = linux_stat->f_bavail; 236 tmp_stat.f_files = linux_stat->f_files; 237 tmp_stat.f_ffree = linux_stat->f_ffree; 238 tmp_stat.f_fsid = linux_stat->f_fsid; 239 if (bufsiz > sizeof(tmp_stat)) 240 bufsiz = sizeof(tmp_stat); 241 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 242 } 243 244 static int 245 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, 246 unsigned long bufsiz) 247 { 248 struct kstatfs linux_stat; 249 int error = vfs_statfs(dentry, &linux_stat); 250 if (!error) 251 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 252 return error; 253 } 254 255 asmlinkage int 256 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz) 257 { 258 struct nameidata nd; 259 int retval; 260 261 retval = user_path_walk(path, &nd); 262 if (!retval) { 263 retval = do_osf_statfs(nd.dentry, buffer, bufsiz); 264 path_release(&nd); 265 } 266 return retval; 267 } 268 269 asmlinkage int 270 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) 271 { 272 struct file *file; 273 int retval; 274 275 retval = -EBADF; 276 file = fget(fd); 277 if (file) { 278 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz); 279 fput(file); 280 } 281 return retval; 282 } 283 284 /* 285 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 286 * 287 * Although to be frank, neither are the native Linux/i386 ones.. 288 */ 289 struct ufs_args { 290 char __user *devname; 291 int flags; 292 uid_t exroot; 293 }; 294 295 struct cdfs_args { 296 char __user *devname; 297 int flags; 298 uid_t exroot; 299 300 /* This has lots more here, which Linux handles with the option block 301 but I'm too lazy to do the translation into ASCII. */ 302 }; 303 304 struct procfs_args { 305 char __user *devname; 306 int flags; 307 uid_t exroot; 308 }; 309 310 /* 311 * We can't actually handle ufs yet, so we translate UFS mounts to 312 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 313 * layout is so braindead it's a major headache doing it. 314 * 315 * Just how long ago was it written? OTOH our UFS driver may be still 316 * unhappy with OSF UFS. [CHECKME] 317 */ 318 static int 319 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 320 { 321 int retval; 322 struct cdfs_args tmp; 323 char *devname; 324 325 retval = -EFAULT; 326 if (copy_from_user(&tmp, args, sizeof(tmp))) 327 goto out; 328 devname = getname(tmp.devname); 329 retval = PTR_ERR(devname); 330 if (IS_ERR(devname)) 331 goto out; 332 retval = do_mount(devname, dirname, "ext2", flags, NULL); 333 putname(devname); 334 out: 335 return retval; 336 } 337 338 static int 339 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 340 { 341 int retval; 342 struct cdfs_args tmp; 343 char *devname; 344 345 retval = -EFAULT; 346 if (copy_from_user(&tmp, args, sizeof(tmp))) 347 goto out; 348 devname = getname(tmp.devname); 349 retval = PTR_ERR(devname); 350 if (IS_ERR(devname)) 351 goto out; 352 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 353 putname(devname); 354 out: 355 return retval; 356 } 357 358 static int 359 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 360 { 361 struct procfs_args tmp; 362 363 if (copy_from_user(&tmp, args, sizeof(tmp))) 364 return -EFAULT; 365 366 return do_mount("", dirname, "proc", flags, NULL); 367 } 368 369 asmlinkage int 370 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) 371 { 372 int retval = -EINVAL; 373 char *name; 374 375 lock_kernel(); 376 377 name = getname(path); 378 retval = PTR_ERR(name); 379 if (IS_ERR(name)) 380 goto out; 381 switch (typenr) { 382 case 1: 383 retval = osf_ufs_mount(name, data, flag); 384 break; 385 case 6: 386 retval = osf_cdfs_mount(name, data, flag); 387 break; 388 case 9: 389 retval = osf_procfs_mount(name, data, flag); 390 break; 391 default: 392 printk("osf_mount(%ld, %x)\n", typenr, flag); 393 } 394 putname(name); 395 out: 396 unlock_kernel(); 397 return retval; 398 } 399 400 asmlinkage int 401 osf_utsname(char __user *name) 402 { 403 int error; 404 405 down_read(&uts_sem); 406 error = -EFAULT; 407 if (copy_to_user(name + 0, utsname()->sysname, 32)) 408 goto out; 409 if (copy_to_user(name + 32, utsname()->nodename, 32)) 410 goto out; 411 if (copy_to_user(name + 64, utsname()->release, 32)) 412 goto out; 413 if (copy_to_user(name + 96, utsname()->version, 32)) 414 goto out; 415 if (copy_to_user(name + 128, utsname()->machine, 32)) 416 goto out; 417 418 error = 0; 419 out: 420 up_read(&uts_sem); 421 return error; 422 } 423 424 asmlinkage unsigned long 425 sys_getpagesize(void) 426 { 427 return PAGE_SIZE; 428 } 429 430 asmlinkage unsigned long 431 sys_getdtablesize(void) 432 { 433 return NR_OPEN; 434 } 435 436 /* 437 * For compatibility with OSF/1 only. Use utsname(2) instead. 438 */ 439 asmlinkage int 440 osf_getdomainname(char __user *name, int namelen) 441 { 442 unsigned len; 443 int i; 444 445 if (!access_ok(VERIFY_WRITE, name, namelen)) 446 return -EFAULT; 447 448 len = namelen; 449 if (namelen > 32) 450 len = 32; 451 452 down_read(&uts_sem); 453 for (i = 0; i < len; ++i) { 454 __put_user(utsname()->domainname[i], name + i); 455 if (utsname()->domainname[i] == '\0') 456 break; 457 } 458 up_read(&uts_sem); 459 460 return 0; 461 } 462 463 /* 464 * The following stuff should move into a header file should it ever 465 * be labeled "officially supported." Right now, there is just enough 466 * support to avoid applications (such as tar) printing error 467 * messages. The attributes are not really implemented. 468 */ 469 470 /* 471 * Values for Property list entry flag 472 */ 473 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 474 by default */ 475 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 476 #define PLE_FLAG_ALL -1 /* All flag value */ 477 478 struct proplistname_args { 479 unsigned int pl_mask; 480 unsigned int pl_numnames; 481 char **pl_names; 482 }; 483 484 union pl_args { 485 struct setargs { 486 char __user *path; 487 long follow; 488 long nbytes; 489 char __user *buf; 490 } set; 491 struct fsetargs { 492 long fd; 493 long nbytes; 494 char __user *buf; 495 } fset; 496 struct getargs { 497 char __user *path; 498 long follow; 499 struct proplistname_args __user *name_args; 500 long nbytes; 501 char __user *buf; 502 int __user *min_buf_size; 503 } get; 504 struct fgetargs { 505 long fd; 506 struct proplistname_args __user *name_args; 507 long nbytes; 508 char __user *buf; 509 int __user *min_buf_size; 510 } fget; 511 struct delargs { 512 char __user *path; 513 long follow; 514 struct proplistname_args __user *name_args; 515 } del; 516 struct fdelargs { 517 long fd; 518 struct proplistname_args __user *name_args; 519 } fdel; 520 }; 521 522 enum pl_code { 523 PL_SET = 1, PL_FSET = 2, 524 PL_GET = 3, PL_FGET = 4, 525 PL_DEL = 5, PL_FDEL = 6 526 }; 527 528 asmlinkage long 529 osf_proplist_syscall(enum pl_code code, union pl_args __user *args) 530 { 531 long error; 532 int __user *min_buf_size_ptr; 533 534 lock_kernel(); 535 switch (code) { 536 case PL_SET: 537 if (get_user(error, &args->set.nbytes)) 538 error = -EFAULT; 539 break; 540 case PL_FSET: 541 if (get_user(error, &args->fset.nbytes)) 542 error = -EFAULT; 543 break; 544 case PL_GET: 545 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 546 if (error) 547 break; 548 error = put_user(0, min_buf_size_ptr); 549 break; 550 case PL_FGET: 551 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 552 if (error) 553 break; 554 error = put_user(0, min_buf_size_ptr); 555 break; 556 case PL_DEL: 557 case PL_FDEL: 558 error = 0; 559 break; 560 default: 561 error = -EOPNOTSUPP; 562 break; 563 }; 564 unlock_kernel(); 565 return error; 566 } 567 568 asmlinkage int 569 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) 570 { 571 unsigned long usp = rdusp(); 572 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 573 unsigned long oss_os = on_sig_stack(usp); 574 int error; 575 576 if (uss) { 577 void __user *ss_sp; 578 579 error = -EFAULT; 580 if (get_user(ss_sp, &uss->ss_sp)) 581 goto out; 582 583 /* If the current stack was set with sigaltstack, don't 584 swap stacks while we are on it. */ 585 error = -EPERM; 586 if (current->sas_ss_sp && on_sig_stack(usp)) 587 goto out; 588 589 /* Since we don't know the extent of the stack, and we don't 590 track onstack-ness, but rather calculate it, we must 591 presume a size. Ho hum this interface is lossy. */ 592 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 593 current->sas_ss_size = SIGSTKSZ; 594 } 595 596 if (uoss) { 597 error = -EFAULT; 598 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 599 || __put_user(oss_sp, &uoss->ss_sp) 600 || __put_user(oss_os, &uoss->ss_onstack)) 601 goto out; 602 } 603 604 error = 0; 605 out: 606 return error; 607 } 608 609 asmlinkage long 610 osf_sysinfo(int command, char __user *buf, long count) 611 { 612 char *sysinfo_table[] = { 613 utsname()->sysname, 614 utsname()->nodename, 615 utsname()->release, 616 utsname()->version, 617 utsname()->machine, 618 "alpha", /* instruction set architecture */ 619 "dummy", /* hardware serial number */ 620 "dummy", /* hardware manufacturer */ 621 "dummy", /* secure RPC domain */ 622 }; 623 unsigned long offset; 624 char *res; 625 long len, err = -EINVAL; 626 627 offset = command-1; 628 if (offset >= ARRAY_SIZE(sysinfo_table)) { 629 /* Digital UNIX has a few unpublished interfaces here */ 630 printk("sysinfo(%d)", command); 631 goto out; 632 } 633 634 down_read(&uts_sem); 635 res = sysinfo_table[offset]; 636 len = strlen(res)+1; 637 if (len > count) 638 len = count; 639 if (copy_to_user(buf, res, len)) 640 err = -EFAULT; 641 else 642 err = 0; 643 up_read(&uts_sem); 644 out: 645 return err; 646 } 647 648 asmlinkage unsigned long 649 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 650 int __user *start, void __user *arg) 651 { 652 unsigned long w; 653 struct percpu_struct *cpu; 654 655 switch (op) { 656 case GSI_IEEE_FP_CONTROL: 657 /* Return current software fp control & status bits. */ 658 /* Note that DU doesn't verify available space here. */ 659 660 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 661 w = swcr_update_status(w, rdfpcr()); 662 if (put_user(w, (unsigned long __user *) buffer)) 663 return -EFAULT; 664 return 0; 665 666 case GSI_IEEE_STATE_AT_SIGNAL: 667 /* 668 * Not sure anybody will ever use this weird stuff. These 669 * ops can be used (under OSF/1) to set the fpcr that should 670 * be used when a signal handler starts executing. 671 */ 672 break; 673 674 case GSI_UACPROC: 675 if (nbytes < sizeof(unsigned int)) 676 return -EINVAL; 677 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 678 if (put_user(w, (unsigned int __user *)buffer)) 679 return -EFAULT; 680 return 1; 681 682 case GSI_PROC_TYPE: 683 if (nbytes < sizeof(unsigned long)) 684 return -EINVAL; 685 cpu = (struct percpu_struct*) 686 ((char*)hwrpb + hwrpb->processor_offset); 687 w = cpu->type; 688 if (put_user(w, (unsigned long __user*)buffer)) 689 return -EFAULT; 690 return 1; 691 692 case GSI_GET_HWRPB: 693 if (nbytes < sizeof(*hwrpb)) 694 return -EINVAL; 695 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 696 return -EFAULT; 697 return 1; 698 699 default: 700 break; 701 } 702 703 return -EOPNOTSUPP; 704 } 705 706 asmlinkage unsigned long 707 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 708 int __user *start, void __user *arg) 709 { 710 switch (op) { 711 case SSI_IEEE_FP_CONTROL: { 712 unsigned long swcr, fpcr; 713 unsigned int *state; 714 715 /* 716 * Alpha Architecture Handbook 4.7.7.3: 717 * To be fully IEEE compiant, we must track the current IEEE 718 * exception state in software, because spurious bits can be 719 * set in the trap shadow of a software-complete insn. 720 */ 721 722 if (get_user(swcr, (unsigned long __user *)buffer)) 723 return -EFAULT; 724 state = ¤t_thread_info()->ieee_state; 725 726 /* Update softare trap enable bits. */ 727 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 728 729 /* Update the real fpcr. */ 730 fpcr = rdfpcr() & FPCR_DYN_MASK; 731 fpcr |= ieee_swcr_to_fpcr(swcr); 732 wrfpcr(fpcr); 733 734 return 0; 735 } 736 737 case SSI_IEEE_RAISE_EXCEPTION: { 738 unsigned long exc, swcr, fpcr, fex; 739 unsigned int *state; 740 741 if (get_user(exc, (unsigned long __user *)buffer)) 742 return -EFAULT; 743 state = ¤t_thread_info()->ieee_state; 744 exc &= IEEE_STATUS_MASK; 745 746 /* Update softare trap enable bits. */ 747 swcr = (*state & IEEE_SW_MASK) | exc; 748 *state |= exc; 749 750 /* Update the real fpcr. */ 751 fpcr = rdfpcr(); 752 fpcr |= ieee_swcr_to_fpcr(swcr); 753 wrfpcr(fpcr); 754 755 /* If any exceptions set by this call, and are unmasked, 756 send a signal. Old exceptions are not signaled. */ 757 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 758 if (fex) { 759 siginfo_t info; 760 int si_code = 0; 761 762 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 763 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 764 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 765 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 766 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 767 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 768 769 info.si_signo = SIGFPE; 770 info.si_errno = 0; 771 info.si_code = si_code; 772 info.si_addr = NULL; /* FIXME */ 773 send_sig_info(SIGFPE, &info, current); 774 } 775 return 0; 776 } 777 778 case SSI_IEEE_STATE_AT_SIGNAL: 779 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 780 /* 781 * Not sure anybody will ever use this weird stuff. These 782 * ops can be used (under OSF/1) to set the fpcr that should 783 * be used when a signal handler starts executing. 784 */ 785 break; 786 787 case SSI_NVPAIRS: { 788 unsigned long v, w, i; 789 unsigned int old, new; 790 791 for (i = 0; i < nbytes; ++i) { 792 793 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 794 return -EFAULT; 795 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 796 return -EFAULT; 797 switch (v) { 798 case SSIN_UACPROC: 799 again: 800 old = current_thread_info()->flags; 801 new = old & ~(UAC_BITMASK << UAC_SHIFT); 802 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 803 if (cmpxchg(¤t_thread_info()->flags, 804 old, new) != old) 805 goto again; 806 break; 807 808 default: 809 return -EOPNOTSUPP; 810 } 811 } 812 return 0; 813 } 814 815 default: 816 break; 817 } 818 819 return -EOPNOTSUPP; 820 } 821 822 /* Translations due to the fact that OSF's time_t is an int. Which 823 affects all sorts of things, like timeval and itimerval. */ 824 825 extern struct timezone sys_tz; 826 827 struct timeval32 828 { 829 int tv_sec, tv_usec; 830 }; 831 832 struct itimerval32 833 { 834 struct timeval32 it_interval; 835 struct timeval32 it_value; 836 }; 837 838 static inline long 839 get_tv32(struct timeval *o, struct timeval32 __user *i) 840 { 841 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 842 (__get_user(o->tv_sec, &i->tv_sec) | 843 __get_user(o->tv_usec, &i->tv_usec))); 844 } 845 846 static inline long 847 put_tv32(struct timeval32 __user *o, struct timeval *i) 848 { 849 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 850 (__put_user(i->tv_sec, &o->tv_sec) | 851 __put_user(i->tv_usec, &o->tv_usec))); 852 } 853 854 static inline long 855 get_it32(struct itimerval *o, struct itimerval32 __user *i) 856 { 857 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 858 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 859 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 860 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 861 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 862 } 863 864 static inline long 865 put_it32(struct itimerval32 __user *o, struct itimerval *i) 866 { 867 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 868 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 869 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 870 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 871 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 872 } 873 874 static inline void 875 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 876 { 877 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 878 value->tv_sec = jiffies / HZ; 879 } 880 881 asmlinkage int 882 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 883 { 884 if (tv) { 885 struct timeval ktv; 886 do_gettimeofday(&ktv); 887 if (put_tv32(tv, &ktv)) 888 return -EFAULT; 889 } 890 if (tz) { 891 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 892 return -EFAULT; 893 } 894 return 0; 895 } 896 897 asmlinkage int 898 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 899 { 900 struct timespec kts; 901 struct timezone ktz; 902 903 if (tv) { 904 if (get_tv32((struct timeval *)&kts, tv)) 905 return -EFAULT; 906 } 907 if (tz) { 908 if (copy_from_user(&ktz, tz, sizeof(*tz))) 909 return -EFAULT; 910 } 911 912 kts.tv_nsec *= 1000; 913 914 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 915 } 916 917 asmlinkage int 918 osf_getitimer(int which, struct itimerval32 __user *it) 919 { 920 struct itimerval kit; 921 int error; 922 923 error = do_getitimer(which, &kit); 924 if (!error && put_it32(it, &kit)) 925 error = -EFAULT; 926 927 return error; 928 } 929 930 asmlinkage int 931 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) 932 { 933 struct itimerval kin, kout; 934 int error; 935 936 if (in) { 937 if (get_it32(&kin, in)) 938 return -EFAULT; 939 } else 940 memset(&kin, 0, sizeof(kin)); 941 942 error = do_setitimer(which, &kin, out ? &kout : NULL); 943 if (error || !out) 944 return error; 945 946 if (put_it32(out, &kout)) 947 return -EFAULT; 948 949 return 0; 950 951 } 952 953 asmlinkage int 954 osf_utimes(char __user *filename, struct timeval32 __user *tvs) 955 { 956 struct timespec tv[2]; 957 958 if (tvs) { 959 struct timeval ktvs[2]; 960 if (get_tv32(&ktvs[0], &tvs[0]) || 961 get_tv32(&ktvs[1], &tvs[1])) 962 return -EFAULT; 963 964 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 965 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 966 return -EINVAL; 967 968 tv[0].tv_sec = ktvs[0].tv_sec; 969 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 970 tv[1].tv_sec = ktvs[1].tv_sec; 971 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 972 } 973 974 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 975 } 976 977 #define MAX_SELECT_SECONDS \ 978 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) 979 980 asmlinkage int 981 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, 982 struct timeval32 __user *tvp) 983 { 984 fd_set_bits fds; 985 char *bits; 986 size_t size; 987 long timeout; 988 int ret = -EINVAL; 989 struct fdtable *fdt; 990 int max_fds; 991 992 timeout = MAX_SCHEDULE_TIMEOUT; 993 if (tvp) { 994 time_t sec, usec; 995 996 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 997 || __get_user(sec, &tvp->tv_sec) 998 || __get_user(usec, &tvp->tv_usec)) { 999 ret = -EFAULT; 1000 goto out_nofds; 1001 } 1002 1003 if (sec < 0 || usec < 0) 1004 goto out_nofds; 1005 1006 if ((unsigned long) sec < MAX_SELECT_SECONDS) { 1007 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); 1008 timeout += sec * (unsigned long) HZ; 1009 } 1010 } 1011 1012 rcu_read_lock(); 1013 fdt = files_fdtable(current->files); 1014 max_fds = fdt->max_fds; 1015 rcu_read_unlock(); 1016 if (n < 0 || n > max_fds) 1017 goto out_nofds; 1018 1019 /* 1020 * We need 6 bitmaps (in/out/ex for both incoming and outgoing), 1021 * since we used fdset we need to allocate memory in units of 1022 * long-words. 1023 */ 1024 ret = -ENOMEM; 1025 size = FDS_BYTES(n); 1026 bits = kmalloc(6 * size, GFP_KERNEL); 1027 if (!bits) 1028 goto out_nofds; 1029 fds.in = (unsigned long *) bits; 1030 fds.out = (unsigned long *) (bits + size); 1031 fds.ex = (unsigned long *) (bits + 2*size); 1032 fds.res_in = (unsigned long *) (bits + 3*size); 1033 fds.res_out = (unsigned long *) (bits + 4*size); 1034 fds.res_ex = (unsigned long *) (bits + 5*size); 1035 1036 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || 1037 (ret = get_fd_set(n, outp->fds_bits, fds.out)) || 1038 (ret = get_fd_set(n, exp->fds_bits, fds.ex))) 1039 goto out; 1040 zero_fd_set(n, fds.res_in); 1041 zero_fd_set(n, fds.res_out); 1042 zero_fd_set(n, fds.res_ex); 1043 1044 ret = do_select(n, &fds, &timeout); 1045 1046 /* OSF does not copy back the remaining time. */ 1047 1048 if (ret < 0) 1049 goto out; 1050 if (!ret) { 1051 ret = -ERESTARTNOHAND; 1052 if (signal_pending(current)) 1053 goto out; 1054 ret = 0; 1055 } 1056 1057 if (set_fd_set(n, inp->fds_bits, fds.res_in) || 1058 set_fd_set(n, outp->fds_bits, fds.res_out) || 1059 set_fd_set(n, exp->fds_bits, fds.res_ex)) 1060 ret = -EFAULT; 1061 1062 out: 1063 kfree(bits); 1064 out_nofds: 1065 return ret; 1066 } 1067 1068 struct rusage32 { 1069 struct timeval32 ru_utime; /* user time used */ 1070 struct timeval32 ru_stime; /* system time used */ 1071 long ru_maxrss; /* maximum resident set size */ 1072 long ru_ixrss; /* integral shared memory size */ 1073 long ru_idrss; /* integral unshared data size */ 1074 long ru_isrss; /* integral unshared stack size */ 1075 long ru_minflt; /* page reclaims */ 1076 long ru_majflt; /* page faults */ 1077 long ru_nswap; /* swaps */ 1078 long ru_inblock; /* block input operations */ 1079 long ru_oublock; /* block output operations */ 1080 long ru_msgsnd; /* messages sent */ 1081 long ru_msgrcv; /* messages received */ 1082 long ru_nsignals; /* signals received */ 1083 long ru_nvcsw; /* voluntary context switches */ 1084 long ru_nivcsw; /* involuntary " */ 1085 }; 1086 1087 asmlinkage int 1088 osf_getrusage(int who, struct rusage32 __user *ru) 1089 { 1090 struct rusage32 r; 1091 1092 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1093 return -EINVAL; 1094 1095 memset(&r, 0, sizeof(r)); 1096 switch (who) { 1097 case RUSAGE_SELF: 1098 jiffies_to_timeval32(current->utime, &r.ru_utime); 1099 jiffies_to_timeval32(current->stime, &r.ru_stime); 1100 r.ru_minflt = current->min_flt; 1101 r.ru_majflt = current->maj_flt; 1102 break; 1103 case RUSAGE_CHILDREN: 1104 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1105 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1106 r.ru_minflt = current->signal->cmin_flt; 1107 r.ru_majflt = current->signal->cmaj_flt; 1108 break; 1109 } 1110 1111 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1112 } 1113 1114 asmlinkage long 1115 osf_wait4(pid_t pid, int __user *ustatus, int options, 1116 struct rusage32 __user *ur) 1117 { 1118 struct rusage r; 1119 long ret, err; 1120 mm_segment_t old_fs; 1121 1122 if (!ur) 1123 return sys_wait4(pid, ustatus, options, NULL); 1124 1125 old_fs = get_fs(); 1126 1127 set_fs (KERNEL_DS); 1128 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1129 set_fs (old_fs); 1130 1131 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1132 return -EFAULT; 1133 1134 err = 0; 1135 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1136 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1137 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1138 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1139 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1140 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1141 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1142 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1143 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1144 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1145 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1146 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1147 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1148 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1149 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1150 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1151 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1152 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1153 1154 return err ? err : ret; 1155 } 1156 1157 /* 1158 * I don't know what the parameters are: the first one 1159 * seems to be a timeval pointer, and I suspect the second 1160 * one is the time remaining.. Ho humm.. No documentation. 1161 */ 1162 asmlinkage int 1163 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) 1164 { 1165 struct timeval tmp; 1166 unsigned long ticks; 1167 1168 if (get_tv32(&tmp, sleep)) 1169 goto fault; 1170 1171 ticks = timeval_to_jiffies(&tmp); 1172 1173 ticks = schedule_timeout_interruptible(ticks); 1174 1175 if (remain) { 1176 jiffies_to_timeval(ticks, &tmp); 1177 if (put_tv32(remain, &tmp)) 1178 goto fault; 1179 } 1180 1181 return 0; 1182 fault: 1183 return -EFAULT; 1184 } 1185 1186 1187 struct timex32 { 1188 unsigned int modes; /* mode selector */ 1189 long offset; /* time offset (usec) */ 1190 long freq; /* frequency offset (scaled ppm) */ 1191 long maxerror; /* maximum error (usec) */ 1192 long esterror; /* estimated error (usec) */ 1193 int status; /* clock command/status */ 1194 long constant; /* pll time constant */ 1195 long precision; /* clock precision (usec) (read only) */ 1196 long tolerance; /* clock frequency tolerance (ppm) 1197 * (read only) 1198 */ 1199 struct timeval32 time; /* (read only) */ 1200 long tick; /* (modified) usecs between clock ticks */ 1201 1202 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1203 long jitter; /* pps jitter (us) (ro) */ 1204 int shift; /* interval duration (s) (shift) (ro) */ 1205 long stabil; /* pps stability (scaled ppm) (ro) */ 1206 long jitcnt; /* jitter limit exceeded (ro) */ 1207 long calcnt; /* calibration intervals (ro) */ 1208 long errcnt; /* calibration errors (ro) */ 1209 long stbcnt; /* stability limit exceeded (ro) */ 1210 1211 int :32; int :32; int :32; int :32; 1212 int :32; int :32; int :32; int :32; 1213 int :32; int :32; int :32; int :32; 1214 }; 1215 1216 asmlinkage int 1217 sys_old_adjtimex(struct timex32 __user *txc_p) 1218 { 1219 struct timex txc; 1220 int ret; 1221 1222 /* copy relevant bits of struct timex. */ 1223 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1224 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1225 offsetof(struct timex32, time))) 1226 return -EFAULT; 1227 1228 ret = do_adjtimex(&txc); 1229 if (ret < 0) 1230 return ret; 1231 1232 /* copy back to timex32 */ 1233 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1234 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1235 offsetof(struct timex32, tick))) || 1236 (put_tv32(&txc_p->time, &txc.time))) 1237 return -EFAULT; 1238 1239 return ret; 1240 } 1241 1242 /* Get an address range which is currently unmapped. Similar to the 1243 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1244 1245 static unsigned long 1246 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1247 unsigned long limit) 1248 { 1249 struct vm_area_struct *vma = find_vma(current->mm, addr); 1250 1251 while (1) { 1252 /* At this point: (!vma || addr < vma->vm_end). */ 1253 if (limit - len < addr) 1254 return -ENOMEM; 1255 if (!vma || addr + len <= vma->vm_start) 1256 return addr; 1257 addr = vma->vm_end; 1258 vma = vma->vm_next; 1259 } 1260 } 1261 1262 unsigned long 1263 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1264 unsigned long len, unsigned long pgoff, 1265 unsigned long flags) 1266 { 1267 unsigned long limit; 1268 1269 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1270 if (current->personality & ADDR_LIMIT_32BIT) 1271 limit = 0x80000000; 1272 else 1273 limit = TASK_SIZE; 1274 1275 if (len > limit) 1276 return -ENOMEM; 1277 1278 if (flags & MAP_FIXED) 1279 return addr; 1280 1281 /* First, see if the given suggestion fits. 1282 1283 The OSF/1 loader (/sbin/loader) relies on us returning an 1284 address larger than the requested if one exists, which is 1285 a terribly broken way to program. 1286 1287 That said, I can see the use in being able to suggest not 1288 merely specific addresses, but regions of memory -- perhaps 1289 this feature should be incorporated into all ports? */ 1290 1291 if (addr) { 1292 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1293 if (addr != (unsigned long) -ENOMEM) 1294 return addr; 1295 } 1296 1297 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1298 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1299 len, limit); 1300 if (addr != (unsigned long) -ENOMEM) 1301 return addr; 1302 1303 /* Finally, try allocating in low memory. */ 1304 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1305 1306 return addr; 1307 } 1308 1309 #ifdef CONFIG_OSF4_COMPAT 1310 1311 /* Clear top 32 bits of iov_len in the user's buffer for 1312 compatibility with old versions of OSF/1 where iov_len 1313 was defined as int. */ 1314 static int 1315 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1316 { 1317 unsigned long i; 1318 1319 for (i = 0 ; i < count ; i++) { 1320 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1321 1322 if (put_user(0, iov_len_high)) 1323 return -EFAULT; 1324 } 1325 return 0; 1326 } 1327 1328 asmlinkage ssize_t 1329 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1330 { 1331 if (unlikely(personality(current->personality) == PER_OSF4)) 1332 if (osf_fix_iov_len(vector, count)) 1333 return -EFAULT; 1334 return sys_readv(fd, vector, count); 1335 } 1336 1337 asmlinkage ssize_t 1338 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1339 { 1340 if (unlikely(personality(current->personality) == PER_OSF4)) 1341 if (osf_fix_iov_len(vector, count)) 1342 return -EFAULT; 1343 return sys_writev(fd, vector, count); 1344 } 1345 1346 #endif 1347