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 #define ROUND_UP(x) (((x)+3) & ~3) 97 98 struct osf_dirent { 99 unsigned int d_ino; 100 unsigned short d_reclen; 101 unsigned short d_namlen; 102 char d_name[1]; 103 }; 104 105 struct osf_dirent_callback { 106 struct osf_dirent __user *dirent; 107 long __user *basep; 108 unsigned int count; 109 int error; 110 }; 111 112 static int 113 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 114 ino_t ino, unsigned int d_type) 115 { 116 struct osf_dirent __user *dirent; 117 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 118 unsigned int reclen = ROUND_UP(NAME_OFFSET + namlen + 1); 119 120 buf->error = -EINVAL; /* only used if we fail */ 121 if (reclen > buf->count) 122 return -EINVAL; 123 if (buf->basep) { 124 if (put_user(offset, buf->basep)) 125 return -EFAULT; 126 buf->basep = NULL; 127 } 128 dirent = buf->dirent; 129 put_user(ino, &dirent->d_ino); 130 put_user(namlen, &dirent->d_namlen); 131 put_user(reclen, &dirent->d_reclen); 132 if (copy_to_user(dirent->d_name, name, namlen) || 133 put_user(0, dirent->d_name + namlen)) 134 return -EFAULT; 135 dirent = (void __user *)dirent + reclen; 136 buf->dirent = dirent; 137 buf->count -= reclen; 138 return 0; 139 } 140 141 asmlinkage int 142 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, 143 unsigned int count, long __user *basep) 144 { 145 int error; 146 struct file *file; 147 struct osf_dirent_callback buf; 148 149 error = -EBADF; 150 file = fget(fd); 151 if (!file) 152 goto out; 153 154 buf.dirent = dirent; 155 buf.basep = basep; 156 buf.count = count; 157 buf.error = 0; 158 159 error = vfs_readdir(file, osf_filldir, &buf); 160 if (error < 0) 161 goto out_putf; 162 163 error = buf.error; 164 if (count != buf.count) 165 error = count - buf.count; 166 167 out_putf: 168 fput(file); 169 out: 170 return error; 171 } 172 173 #undef ROUND_UP 174 #undef NAME_OFFSET 175 176 asmlinkage unsigned long 177 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, 178 unsigned long flags, unsigned long fd, unsigned long off) 179 { 180 struct file *file = NULL; 181 unsigned long ret = -EBADF; 182 183 #if 0 184 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 185 printk("%s: unimplemented OSF mmap flags %04lx\n", 186 current->comm, flags); 187 #endif 188 if (!(flags & MAP_ANONYMOUS)) { 189 file = fget(fd); 190 if (!file) 191 goto out; 192 } 193 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); 194 down_write(¤t->mm->mmap_sem); 195 ret = do_mmap(file, addr, len, prot, flags, off); 196 up_write(¤t->mm->mmap_sem); 197 if (file) 198 fput(file); 199 out: 200 return ret; 201 } 202 203 204 /* 205 * The OSF/1 statfs structure is much larger, but this should 206 * match the beginning, at least. 207 */ 208 struct osf_statfs { 209 short f_type; 210 short f_flags; 211 int f_fsize; 212 int f_bsize; 213 int f_blocks; 214 int f_bfree; 215 int f_bavail; 216 int f_files; 217 int f_ffree; 218 __kernel_fsid_t f_fsid; 219 }; 220 221 static int 222 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 223 unsigned long bufsiz) 224 { 225 struct osf_statfs tmp_stat; 226 227 tmp_stat.f_type = linux_stat->f_type; 228 tmp_stat.f_flags = 0; /* mount flags */ 229 tmp_stat.f_fsize = linux_stat->f_frsize; 230 tmp_stat.f_bsize = linux_stat->f_bsize; 231 tmp_stat.f_blocks = linux_stat->f_blocks; 232 tmp_stat.f_bfree = linux_stat->f_bfree; 233 tmp_stat.f_bavail = linux_stat->f_bavail; 234 tmp_stat.f_files = linux_stat->f_files; 235 tmp_stat.f_ffree = linux_stat->f_ffree; 236 tmp_stat.f_fsid = linux_stat->f_fsid; 237 if (bufsiz > sizeof(tmp_stat)) 238 bufsiz = sizeof(tmp_stat); 239 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 240 } 241 242 static int 243 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, 244 unsigned long bufsiz) 245 { 246 struct kstatfs linux_stat; 247 int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat); 248 if (!error) 249 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 250 return error; 251 } 252 253 asmlinkage int 254 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz) 255 { 256 struct nameidata nd; 257 int retval; 258 259 retval = user_path_walk(path, &nd); 260 if (!retval) { 261 retval = do_osf_statfs(nd.dentry, buffer, bufsiz); 262 path_release(&nd); 263 } 264 return retval; 265 } 266 267 asmlinkage int 268 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) 269 { 270 struct file *file; 271 int retval; 272 273 retval = -EBADF; 274 file = fget(fd); 275 if (file) { 276 retval = do_osf_statfs(file->f_dentry, buffer, bufsiz); 277 fput(file); 278 } 279 return retval; 280 } 281 282 /* 283 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 284 * 285 * Although to be frank, neither are the native Linux/i386 ones.. 286 */ 287 struct ufs_args { 288 char __user *devname; 289 int flags; 290 uid_t exroot; 291 }; 292 293 struct cdfs_args { 294 char __user *devname; 295 int flags; 296 uid_t exroot; 297 298 /* This has lots more here, which Linux handles with the option block 299 but I'm too lazy to do the translation into ASCII. */ 300 }; 301 302 struct procfs_args { 303 char __user *devname; 304 int flags; 305 uid_t exroot; 306 }; 307 308 /* 309 * We can't actually handle ufs yet, so we translate UFS mounts to 310 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 311 * layout is so braindead it's a major headache doing it. 312 * 313 * Just how long ago was it written? OTOH our UFS driver may be still 314 * unhappy with OSF UFS. [CHECKME] 315 */ 316 static int 317 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 318 { 319 int retval; 320 struct cdfs_args tmp; 321 char *devname; 322 323 retval = -EFAULT; 324 if (copy_from_user(&tmp, args, sizeof(tmp))) 325 goto out; 326 devname = getname(tmp.devname); 327 retval = PTR_ERR(devname); 328 if (IS_ERR(devname)) 329 goto out; 330 retval = do_mount(devname, dirname, "ext2", flags, NULL); 331 putname(devname); 332 out: 333 return retval; 334 } 335 336 static int 337 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 338 { 339 int retval; 340 struct cdfs_args tmp; 341 char *devname; 342 343 retval = -EFAULT; 344 if (copy_from_user(&tmp, args, sizeof(tmp))) 345 goto out; 346 devname = getname(tmp.devname); 347 retval = PTR_ERR(devname); 348 if (IS_ERR(devname)) 349 goto out; 350 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 351 putname(devname); 352 out: 353 return retval; 354 } 355 356 static int 357 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 358 { 359 struct procfs_args tmp; 360 361 if (copy_from_user(&tmp, args, sizeof(tmp))) 362 return -EFAULT; 363 364 return do_mount("", dirname, "proc", flags, NULL); 365 } 366 367 asmlinkage int 368 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) 369 { 370 int retval = -EINVAL; 371 char *name; 372 373 lock_kernel(); 374 375 name = getname(path); 376 retval = PTR_ERR(name); 377 if (IS_ERR(name)) 378 goto out; 379 switch (typenr) { 380 case 1: 381 retval = osf_ufs_mount(name, data, flag); 382 break; 383 case 6: 384 retval = osf_cdfs_mount(name, data, flag); 385 break; 386 case 9: 387 retval = osf_procfs_mount(name, data, flag); 388 break; 389 default: 390 printk("osf_mount(%ld, %x)\n", typenr, flag); 391 } 392 putname(name); 393 out: 394 unlock_kernel(); 395 return retval; 396 } 397 398 asmlinkage int 399 osf_utsname(char __user *name) 400 { 401 int error; 402 403 down_read(&uts_sem); 404 error = -EFAULT; 405 if (copy_to_user(name + 0, system_utsname.sysname, 32)) 406 goto out; 407 if (copy_to_user(name + 32, system_utsname.nodename, 32)) 408 goto out; 409 if (copy_to_user(name + 64, system_utsname.release, 32)) 410 goto out; 411 if (copy_to_user(name + 96, system_utsname.version, 32)) 412 goto out; 413 if (copy_to_user(name + 128, system_utsname.machine, 32)) 414 goto out; 415 416 error = 0; 417 out: 418 up_read(&uts_sem); 419 return error; 420 } 421 422 asmlinkage unsigned long 423 sys_getpagesize(void) 424 { 425 return PAGE_SIZE; 426 } 427 428 asmlinkage unsigned long 429 sys_getdtablesize(void) 430 { 431 return NR_OPEN; 432 } 433 434 /* 435 * For compatibility with OSF/1 only. Use utsname(2) instead. 436 */ 437 asmlinkage int 438 osf_getdomainname(char __user *name, int namelen) 439 { 440 unsigned len; 441 int i; 442 443 if (!access_ok(VERIFY_WRITE, name, namelen)) 444 return -EFAULT; 445 446 len = namelen; 447 if (namelen > 32) 448 len = 32; 449 450 down_read(&uts_sem); 451 for (i = 0; i < len; ++i) { 452 __put_user(system_utsname.domainname[i], name + i); 453 if (system_utsname.domainname[i] == '\0') 454 break; 455 } 456 up_read(&uts_sem); 457 458 return 0; 459 } 460 461 /* 462 * The following stuff should move into a header file should it ever 463 * be labeled "officially supported." Right now, there is just enough 464 * support to avoid applications (such as tar) printing error 465 * messages. The attributes are not really implemented. 466 */ 467 468 /* 469 * Values for Property list entry flag 470 */ 471 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 472 by default */ 473 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 474 #define PLE_FLAG_ALL -1 /* All flag value */ 475 476 struct proplistname_args { 477 unsigned int pl_mask; 478 unsigned int pl_numnames; 479 char **pl_names; 480 }; 481 482 union pl_args { 483 struct setargs { 484 char __user *path; 485 long follow; 486 long nbytes; 487 char __user *buf; 488 } set; 489 struct fsetargs { 490 long fd; 491 long nbytes; 492 char __user *buf; 493 } fset; 494 struct getargs { 495 char __user *path; 496 long follow; 497 struct proplistname_args __user *name_args; 498 long nbytes; 499 char __user *buf; 500 int __user *min_buf_size; 501 } get; 502 struct fgetargs { 503 long fd; 504 struct proplistname_args __user *name_args; 505 long nbytes; 506 char __user *buf; 507 int __user *min_buf_size; 508 } fget; 509 struct delargs { 510 char __user *path; 511 long follow; 512 struct proplistname_args __user *name_args; 513 } del; 514 struct fdelargs { 515 long fd; 516 struct proplistname_args __user *name_args; 517 } fdel; 518 }; 519 520 enum pl_code { 521 PL_SET = 1, PL_FSET = 2, 522 PL_GET = 3, PL_FGET = 4, 523 PL_DEL = 5, PL_FDEL = 6 524 }; 525 526 asmlinkage long 527 osf_proplist_syscall(enum pl_code code, union pl_args __user *args) 528 { 529 long error; 530 int __user *min_buf_size_ptr; 531 532 lock_kernel(); 533 switch (code) { 534 case PL_SET: 535 if (get_user(error, &args->set.nbytes)) 536 error = -EFAULT; 537 break; 538 case PL_FSET: 539 if (get_user(error, &args->fset.nbytes)) 540 error = -EFAULT; 541 break; 542 case PL_GET: 543 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 544 if (error) 545 break; 546 error = put_user(0, min_buf_size_ptr); 547 break; 548 case PL_FGET: 549 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 550 if (error) 551 break; 552 error = put_user(0, min_buf_size_ptr); 553 break; 554 case PL_DEL: 555 case PL_FDEL: 556 error = 0; 557 break; 558 default: 559 error = -EOPNOTSUPP; 560 break; 561 }; 562 unlock_kernel(); 563 return error; 564 } 565 566 asmlinkage int 567 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) 568 { 569 unsigned long usp = rdusp(); 570 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 571 unsigned long oss_os = on_sig_stack(usp); 572 int error; 573 574 if (uss) { 575 void __user *ss_sp; 576 577 error = -EFAULT; 578 if (get_user(ss_sp, &uss->ss_sp)) 579 goto out; 580 581 /* If the current stack was set with sigaltstack, don't 582 swap stacks while we are on it. */ 583 error = -EPERM; 584 if (current->sas_ss_sp && on_sig_stack(usp)) 585 goto out; 586 587 /* Since we don't know the extent of the stack, and we don't 588 track onstack-ness, but rather calculate it, we must 589 presume a size. Ho hum this interface is lossy. */ 590 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 591 current->sas_ss_size = SIGSTKSZ; 592 } 593 594 if (uoss) { 595 error = -EFAULT; 596 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 597 || __put_user(oss_sp, &uoss->ss_sp) 598 || __put_user(oss_os, &uoss->ss_onstack)) 599 goto out; 600 } 601 602 error = 0; 603 out: 604 return error; 605 } 606 607 asmlinkage long 608 osf_sysinfo(int command, char __user *buf, long count) 609 { 610 static char * sysinfo_table[] = { 611 system_utsname.sysname, 612 system_utsname.nodename, 613 system_utsname.release, 614 system_utsname.version, 615 system_utsname.machine, 616 "alpha", /* instruction set architecture */ 617 "dummy", /* hardware serial number */ 618 "dummy", /* hardware manufacturer */ 619 "dummy", /* secure RPC domain */ 620 }; 621 unsigned long offset; 622 char *res; 623 long len, err = -EINVAL; 624 625 offset = command-1; 626 if (offset >= sizeof(sysinfo_table)/sizeof(char *)) { 627 /* Digital UNIX has a few unpublished interfaces here */ 628 printk("sysinfo(%d)", command); 629 goto out; 630 } 631 632 down_read(&uts_sem); 633 res = sysinfo_table[offset]; 634 len = strlen(res)+1; 635 if (len > count) 636 len = count; 637 if (copy_to_user(buf, res, len)) 638 err = -EFAULT; 639 else 640 err = 0; 641 up_read(&uts_sem); 642 out: 643 return err; 644 } 645 646 asmlinkage unsigned long 647 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 648 int __user *start, void __user *arg) 649 { 650 unsigned long w; 651 struct percpu_struct *cpu; 652 653 switch (op) { 654 case GSI_IEEE_FP_CONTROL: 655 /* Return current software fp control & status bits. */ 656 /* Note that DU doesn't verify available space here. */ 657 658 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 659 w = swcr_update_status(w, rdfpcr()); 660 if (put_user(w, (unsigned long __user *) buffer)) 661 return -EFAULT; 662 return 0; 663 664 case GSI_IEEE_STATE_AT_SIGNAL: 665 /* 666 * Not sure anybody will ever use this weird stuff. These 667 * ops can be used (under OSF/1) to set the fpcr that should 668 * be used when a signal handler starts executing. 669 */ 670 break; 671 672 case GSI_UACPROC: 673 if (nbytes < sizeof(unsigned int)) 674 return -EINVAL; 675 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 676 if (put_user(w, (unsigned int __user *)buffer)) 677 return -EFAULT; 678 return 1; 679 680 case GSI_PROC_TYPE: 681 if (nbytes < sizeof(unsigned long)) 682 return -EINVAL; 683 cpu = (struct percpu_struct*) 684 ((char*)hwrpb + hwrpb->processor_offset); 685 w = cpu->type; 686 if (put_user(w, (unsigned long __user*)buffer)) 687 return -EFAULT; 688 return 1; 689 690 case GSI_GET_HWRPB: 691 if (nbytes < sizeof(*hwrpb)) 692 return -EINVAL; 693 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 694 return -EFAULT; 695 return 1; 696 697 default: 698 break; 699 } 700 701 return -EOPNOTSUPP; 702 } 703 704 asmlinkage unsigned long 705 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 706 int __user *start, void __user *arg) 707 { 708 switch (op) { 709 case SSI_IEEE_FP_CONTROL: { 710 unsigned long swcr, fpcr; 711 unsigned int *state; 712 713 /* 714 * Alpha Architecture Handbook 4.7.7.3: 715 * To be fully IEEE compiant, we must track the current IEEE 716 * exception state in software, because spurrious bits can be 717 * set in the trap shadow of a software-complete insn. 718 */ 719 720 if (get_user(swcr, (unsigned long __user *)buffer)) 721 return -EFAULT; 722 state = ¤t_thread_info()->ieee_state; 723 724 /* Update softare trap enable bits. */ 725 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 726 727 /* Update the real fpcr. */ 728 fpcr = rdfpcr() & FPCR_DYN_MASK; 729 fpcr |= ieee_swcr_to_fpcr(swcr); 730 wrfpcr(fpcr); 731 732 return 0; 733 } 734 735 case SSI_IEEE_RAISE_EXCEPTION: { 736 unsigned long exc, swcr, fpcr, fex; 737 unsigned int *state; 738 739 if (get_user(exc, (unsigned long __user *)buffer)) 740 return -EFAULT; 741 state = ¤t_thread_info()->ieee_state; 742 exc &= IEEE_STATUS_MASK; 743 744 /* Update softare trap enable bits. */ 745 swcr = (*state & IEEE_SW_MASK) | exc; 746 *state |= exc; 747 748 /* Update the real fpcr. */ 749 fpcr = rdfpcr(); 750 fpcr |= ieee_swcr_to_fpcr(swcr); 751 wrfpcr(fpcr); 752 753 /* If any exceptions set by this call, and are unmasked, 754 send a signal. Old exceptions are not signaled. */ 755 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 756 if (fex) { 757 siginfo_t info; 758 int si_code = 0; 759 760 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 761 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 762 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 763 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 764 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 765 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 766 767 info.si_signo = SIGFPE; 768 info.si_errno = 0; 769 info.si_code = si_code; 770 info.si_addr = NULL; /* FIXME */ 771 send_sig_info(SIGFPE, &info, current); 772 } 773 return 0; 774 } 775 776 case SSI_IEEE_STATE_AT_SIGNAL: 777 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 778 /* 779 * Not sure anybody will ever use this weird stuff. These 780 * ops can be used (under OSF/1) to set the fpcr that should 781 * be used when a signal handler starts executing. 782 */ 783 break; 784 785 case SSI_NVPAIRS: { 786 unsigned long v, w, i; 787 unsigned int old, new; 788 789 for (i = 0; i < nbytes; ++i) { 790 791 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 792 return -EFAULT; 793 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 794 return -EFAULT; 795 switch (v) { 796 case SSIN_UACPROC: 797 again: 798 old = current_thread_info()->flags; 799 new = old & ~(UAC_BITMASK << UAC_SHIFT); 800 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 801 if (cmpxchg(¤t_thread_info()->flags, 802 old, new) != old) 803 goto again; 804 break; 805 806 default: 807 return -EOPNOTSUPP; 808 } 809 } 810 return 0; 811 } 812 813 default: 814 break; 815 } 816 817 return -EOPNOTSUPP; 818 } 819 820 /* Translations due to the fact that OSF's time_t is an int. Which 821 affects all sorts of things, like timeval and itimerval. */ 822 823 extern struct timezone sys_tz; 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(AT_FDCWD, 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 struct fdtable *fdt; 978 int max_fdset; 979 980 timeout = MAX_SCHEDULE_TIMEOUT; 981 if (tvp) { 982 time_t sec, usec; 983 984 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 985 || __get_user(sec, &tvp->tv_sec) 986 || __get_user(usec, &tvp->tv_usec)) { 987 ret = -EFAULT; 988 goto out_nofds; 989 } 990 991 if (sec < 0 || usec < 0) 992 goto out_nofds; 993 994 if ((unsigned long) sec < MAX_SELECT_SECONDS) { 995 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); 996 timeout += sec * (unsigned long) HZ; 997 } 998 } 999 1000 rcu_read_lock(); 1001 fdt = files_fdtable(current->files); 1002 max_fdset = fdt->max_fdset; 1003 rcu_read_unlock(); 1004 if (n < 0 || n > max_fdset) 1005 goto out_nofds; 1006 1007 /* 1008 * We need 6 bitmaps (in/out/ex for both incoming and outgoing), 1009 * since we used fdset we need to allocate memory in units of 1010 * long-words. 1011 */ 1012 ret = -ENOMEM; 1013 size = FDS_BYTES(n); 1014 bits = kmalloc(6 * size, GFP_KERNEL); 1015 if (!bits) 1016 goto out_nofds; 1017 fds.in = (unsigned long *) bits; 1018 fds.out = (unsigned long *) (bits + size); 1019 fds.ex = (unsigned long *) (bits + 2*size); 1020 fds.res_in = (unsigned long *) (bits + 3*size); 1021 fds.res_out = (unsigned long *) (bits + 4*size); 1022 fds.res_ex = (unsigned long *) (bits + 5*size); 1023 1024 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || 1025 (ret = get_fd_set(n, outp->fds_bits, fds.out)) || 1026 (ret = get_fd_set(n, exp->fds_bits, fds.ex))) 1027 goto out; 1028 zero_fd_set(n, fds.res_in); 1029 zero_fd_set(n, fds.res_out); 1030 zero_fd_set(n, fds.res_ex); 1031 1032 ret = do_select(n, &fds, &timeout); 1033 1034 /* OSF does not copy back the remaining time. */ 1035 1036 if (ret < 0) 1037 goto out; 1038 if (!ret) { 1039 ret = -ERESTARTNOHAND; 1040 if (signal_pending(current)) 1041 goto out; 1042 ret = 0; 1043 } 1044 1045 if (set_fd_set(n, inp->fds_bits, fds.res_in) || 1046 set_fd_set(n, outp->fds_bits, fds.res_out) || 1047 set_fd_set(n, exp->fds_bits, fds.res_ex)) 1048 ret = -EFAULT; 1049 1050 out: 1051 kfree(bits); 1052 out_nofds: 1053 return ret; 1054 } 1055 1056 struct rusage32 { 1057 struct timeval32 ru_utime; /* user time used */ 1058 struct timeval32 ru_stime; /* system time used */ 1059 long ru_maxrss; /* maximum resident set size */ 1060 long ru_ixrss; /* integral shared memory size */ 1061 long ru_idrss; /* integral unshared data size */ 1062 long ru_isrss; /* integral unshared stack size */ 1063 long ru_minflt; /* page reclaims */ 1064 long ru_majflt; /* page faults */ 1065 long ru_nswap; /* swaps */ 1066 long ru_inblock; /* block input operations */ 1067 long ru_oublock; /* block output operations */ 1068 long ru_msgsnd; /* messages sent */ 1069 long ru_msgrcv; /* messages received */ 1070 long ru_nsignals; /* signals received */ 1071 long ru_nvcsw; /* voluntary context switches */ 1072 long ru_nivcsw; /* involuntary " */ 1073 }; 1074 1075 asmlinkage int 1076 osf_getrusage(int who, struct rusage32 __user *ru) 1077 { 1078 struct rusage32 r; 1079 1080 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1081 return -EINVAL; 1082 1083 memset(&r, 0, sizeof(r)); 1084 switch (who) { 1085 case RUSAGE_SELF: 1086 jiffies_to_timeval32(current->utime, &r.ru_utime); 1087 jiffies_to_timeval32(current->stime, &r.ru_stime); 1088 r.ru_minflt = current->min_flt; 1089 r.ru_majflt = current->maj_flt; 1090 break; 1091 case RUSAGE_CHILDREN: 1092 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1093 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1094 r.ru_minflt = current->signal->cmin_flt; 1095 r.ru_majflt = current->signal->cmaj_flt; 1096 break; 1097 } 1098 1099 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1100 } 1101 1102 asmlinkage long 1103 osf_wait4(pid_t pid, int __user *ustatus, int options, 1104 struct rusage32 __user *ur) 1105 { 1106 struct rusage r; 1107 long ret, err; 1108 mm_segment_t old_fs; 1109 1110 if (!ur) 1111 return sys_wait4(pid, ustatus, options, NULL); 1112 1113 old_fs = get_fs(); 1114 1115 set_fs (KERNEL_DS); 1116 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1117 set_fs (old_fs); 1118 1119 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1120 return -EFAULT; 1121 1122 err = 0; 1123 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1124 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1125 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1126 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1127 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1128 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1129 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1130 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1131 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1132 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1133 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1134 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1135 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1136 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1137 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1138 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1139 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1140 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1141 1142 return err ? err : ret; 1143 } 1144 1145 /* 1146 * I don't know what the parameters are: the first one 1147 * seems to be a timeval pointer, and I suspect the second 1148 * one is the time remaining.. Ho humm.. No documentation. 1149 */ 1150 asmlinkage int 1151 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) 1152 { 1153 struct timeval tmp; 1154 unsigned long ticks; 1155 1156 if (get_tv32(&tmp, sleep)) 1157 goto fault; 1158 1159 ticks = timeval_to_jiffies(&tmp); 1160 1161 ticks = schedule_timeout_interruptible(ticks); 1162 1163 if (remain) { 1164 jiffies_to_timeval(ticks, &tmp); 1165 if (put_tv32(remain, &tmp)) 1166 goto fault; 1167 } 1168 1169 return 0; 1170 fault: 1171 return -EFAULT; 1172 } 1173 1174 1175 struct timex32 { 1176 unsigned int modes; /* mode selector */ 1177 long offset; /* time offset (usec) */ 1178 long freq; /* frequency offset (scaled ppm) */ 1179 long maxerror; /* maximum error (usec) */ 1180 long esterror; /* estimated error (usec) */ 1181 int status; /* clock command/status */ 1182 long constant; /* pll time constant */ 1183 long precision; /* clock precision (usec) (read only) */ 1184 long tolerance; /* clock frequency tolerance (ppm) 1185 * (read only) 1186 */ 1187 struct timeval32 time; /* (read only) */ 1188 long tick; /* (modified) usecs between clock ticks */ 1189 1190 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1191 long jitter; /* pps jitter (us) (ro) */ 1192 int shift; /* interval duration (s) (shift) (ro) */ 1193 long stabil; /* pps stability (scaled ppm) (ro) */ 1194 long jitcnt; /* jitter limit exceeded (ro) */ 1195 long calcnt; /* calibration intervals (ro) */ 1196 long errcnt; /* calibration errors (ro) */ 1197 long stbcnt; /* stability limit exceeded (ro) */ 1198 1199 int :32; int :32; int :32; int :32; 1200 int :32; int :32; int :32; int :32; 1201 int :32; int :32; int :32; int :32; 1202 }; 1203 1204 asmlinkage int 1205 sys_old_adjtimex(struct timex32 __user *txc_p) 1206 { 1207 struct timex txc; 1208 int ret; 1209 1210 /* copy relevant bits of struct timex. */ 1211 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1212 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1213 offsetof(struct timex32, time))) 1214 return -EFAULT; 1215 1216 ret = do_adjtimex(&txc); 1217 if (ret < 0) 1218 return ret; 1219 1220 /* copy back to timex32 */ 1221 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1222 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1223 offsetof(struct timex32, tick))) || 1224 (put_tv32(&txc_p->time, &txc.time))) 1225 return -EFAULT; 1226 1227 return ret; 1228 } 1229 1230 /* Get an address range which is currently unmapped. Similar to the 1231 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1232 1233 static unsigned long 1234 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1235 unsigned long limit) 1236 { 1237 struct vm_area_struct *vma = find_vma(current->mm, addr); 1238 1239 while (1) { 1240 /* At this point: (!vma || addr < vma->vm_end). */ 1241 if (limit - len < addr) 1242 return -ENOMEM; 1243 if (!vma || addr + len <= vma->vm_start) 1244 return addr; 1245 addr = vma->vm_end; 1246 vma = vma->vm_next; 1247 } 1248 } 1249 1250 unsigned long 1251 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1252 unsigned long len, unsigned long pgoff, 1253 unsigned long flags) 1254 { 1255 unsigned long limit; 1256 1257 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1258 if (current->personality & ADDR_LIMIT_32BIT) 1259 limit = 0x80000000; 1260 else 1261 limit = TASK_SIZE; 1262 1263 if (len > limit) 1264 return -ENOMEM; 1265 1266 /* First, see if the given suggestion fits. 1267 1268 The OSF/1 loader (/sbin/loader) relies on us returning an 1269 address larger than the requested if one exists, which is 1270 a terribly broken way to program. 1271 1272 That said, I can see the use in being able to suggest not 1273 merely specific addresses, but regions of memory -- perhaps 1274 this feature should be incorporated into all ports? */ 1275 1276 if (addr) { 1277 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1278 if (addr != (unsigned long) -ENOMEM) 1279 return addr; 1280 } 1281 1282 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1283 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1284 len, limit); 1285 if (addr != (unsigned long) -ENOMEM) 1286 return addr; 1287 1288 /* Finally, try allocating in low memory. */ 1289 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1290 1291 return addr; 1292 } 1293 1294 #ifdef CONFIG_OSF4_COMPAT 1295 1296 /* Clear top 32 bits of iov_len in the user's buffer for 1297 compatibility with old versions of OSF/1 where iov_len 1298 was defined as int. */ 1299 static int 1300 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1301 { 1302 unsigned long i; 1303 1304 for (i = 0 ; i < count ; i++) { 1305 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1306 1307 if (put_user(0, iov_len_high)) 1308 return -EFAULT; 1309 } 1310 return 0; 1311 } 1312 1313 asmlinkage ssize_t 1314 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1315 { 1316 if (unlikely(personality(current->personality) == PER_OSF4)) 1317 if (osf_fix_iov_len(vector, count)) 1318 return -EFAULT; 1319 return sys_readv(fd, vector, count); 1320 } 1321 1322 asmlinkage ssize_t 1323 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1324 { 1325 if (unlikely(personality(current->personality) == PER_OSF4)) 1326 if (osf_fix_iov_len(vector, count)) 1327 return -EFAULT; 1328 return sys_writev(fd, vector, count); 1329 } 1330 1331 #endif 1332