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/stddef.h> 19 #include <linux/syscalls.h> 20 #include <linux/unistd.h> 21 #include <linux/ptrace.h> 22 #include <linux/user.h> 23 #include <linux/utsname.h> 24 #include <linux/time.h> 25 #include <linux/timex.h> 26 #include <linux/major.h> 27 #include <linux/stat.h> 28 #include <linux/mman.h> 29 #include <linux/shm.h> 30 #include <linux/poll.h> 31 #include <linux/file.h> 32 #include <linux/types.h> 33 #include <linux/ipc.h> 34 #include <linux/namei.h> 35 #include <linux/uio.h> 36 #include <linux/vfs.h> 37 #include <linux/rcupdate.h> 38 #include <linux/slab.h> 39 40 #include <asm/fpu.h> 41 #include <asm/io.h> 42 #include <asm/uaccess.h> 43 #include <asm/sysinfo.h> 44 #include <asm/thread_info.h> 45 #include <asm/hwrpb.h> 46 #include <asm/processor.h> 47 48 /* 49 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 50 * which OSF programs just shouldn't be doing. We're still not quite 51 * identical to OSF as we don't return 0 on success, but doing otherwise 52 * would require changes to libc. Hopefully this is good enough. 53 */ 54 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 55 { 56 unsigned long retval = sys_brk(brk); 57 if (brk && brk != retval) 58 retval = -ENOMEM; 59 return retval; 60 } 61 62 /* 63 * This is pure guess-work.. 64 */ 65 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 66 unsigned long, text_len, unsigned long, bss_start, 67 unsigned long, bss_len) 68 { 69 struct mm_struct *mm; 70 71 mm = current->mm; 72 mm->end_code = bss_start + bss_len; 73 mm->start_brk = bss_start + bss_len; 74 mm->brk = bss_start + bss_len; 75 #if 0 76 printk("set_program_attributes(%lx %lx %lx %lx)\n", 77 text_start, text_len, bss_start, bss_len); 78 #endif 79 return 0; 80 } 81 82 /* 83 * OSF/1 directory handling functions... 84 * 85 * The "getdents()" interface is much more sane: the "basep" stuff is 86 * braindamage (it can't really handle filesystems where the directory 87 * offset differences aren't the same as "d_reclen"). 88 */ 89 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 90 91 struct osf_dirent { 92 unsigned int d_ino; 93 unsigned short d_reclen; 94 unsigned short d_namlen; 95 char d_name[1]; 96 }; 97 98 struct osf_dirent_callback { 99 struct osf_dirent __user *dirent; 100 long __user *basep; 101 unsigned int count; 102 int error; 103 }; 104 105 static int 106 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 107 u64 ino, unsigned int d_type) 108 { 109 struct osf_dirent __user *dirent; 110 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 111 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 112 unsigned int d_ino; 113 114 buf->error = -EINVAL; /* only used if we fail */ 115 if (reclen > buf->count) 116 return -EINVAL; 117 d_ino = ino; 118 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 119 buf->error = -EOVERFLOW; 120 return -EOVERFLOW; 121 } 122 if (buf->basep) { 123 if (put_user(offset, buf->basep)) 124 goto Efault; 125 buf->basep = NULL; 126 } 127 dirent = buf->dirent; 128 if (put_user(d_ino, &dirent->d_ino) || 129 put_user(namlen, &dirent->d_namlen) || 130 put_user(reclen, &dirent->d_reclen) || 131 copy_to_user(dirent->d_name, name, namlen) || 132 put_user(0, dirent->d_name + namlen)) 133 goto Efault; 134 dirent = (void __user *)dirent + reclen; 135 buf->dirent = dirent; 136 buf->count -= reclen; 137 return 0; 138 Efault: 139 buf->error = -EFAULT; 140 return -EFAULT; 141 } 142 143 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 144 struct osf_dirent __user *, dirent, unsigned int, count, 145 long __user *, basep) 146 { 147 int error; 148 struct file *file; 149 struct osf_dirent_callback buf; 150 151 error = -EBADF; 152 file = fget(fd); 153 if (!file) 154 goto out; 155 156 buf.dirent = dirent; 157 buf.basep = basep; 158 buf.count = count; 159 buf.error = 0; 160 161 error = vfs_readdir(file, osf_filldir, &buf); 162 if (error >= 0) 163 error = buf.error; 164 if (count != buf.count) 165 error = count - buf.count; 166 167 fput(file); 168 out: 169 return error; 170 } 171 172 #undef NAME_OFFSET 173 174 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 175 unsigned long, prot, unsigned long, flags, unsigned long, fd, 176 unsigned long, off) 177 { 178 unsigned long ret = -EINVAL; 179 180 #if 0 181 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 182 printk("%s: unimplemented OSF mmap flags %04lx\n", 183 current->comm, flags); 184 #endif 185 if ((off + PAGE_ALIGN(len)) < off) 186 goto out; 187 if (off & ~PAGE_MASK) 188 goto out; 189 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 190 out: 191 return ret; 192 } 193 194 struct osf_stat { 195 int st_dev; 196 int st_pad1; 197 unsigned st_mode; 198 unsigned short st_nlink; 199 short st_nlink_reserved; 200 unsigned st_uid; 201 unsigned st_gid; 202 int st_rdev; 203 int st_ldev; 204 long st_size; 205 int st_pad2; 206 int st_uatime; 207 int st_pad3; 208 int st_umtime; 209 int st_pad4; 210 int st_uctime; 211 int st_pad5; 212 int st_pad6; 213 unsigned st_flags; 214 unsigned st_gen; 215 long st_spare[4]; 216 unsigned st_ino; 217 int st_ino_reserved; 218 int st_atime; 219 int st_atime_reserved; 220 int st_mtime; 221 int st_mtime_reserved; 222 int st_ctime; 223 int st_ctime_reserved; 224 long st_blksize; 225 long st_blocks; 226 }; 227 228 /* 229 * The OSF/1 statfs structure is much larger, but this should 230 * match the beginning, at least. 231 */ 232 struct osf_statfs { 233 short f_type; 234 short f_flags; 235 int f_fsize; 236 int f_bsize; 237 int f_blocks; 238 int f_bfree; 239 int f_bavail; 240 int f_files; 241 int f_ffree; 242 __kernel_fsid_t f_fsid; 243 }; 244 245 struct osf_statfs64 { 246 short f_type; 247 short f_flags; 248 int f_pad1; 249 int f_pad2; 250 int f_pad3; 251 int f_pad4; 252 int f_pad5; 253 int f_pad6; 254 int f_pad7; 255 __kernel_fsid_t f_fsid; 256 u_short f_namemax; 257 short f_reserved1; 258 int f_spare[8]; 259 char f_pad8[90]; 260 char f_pad9[90]; 261 long mount_info[10]; 262 u_long f_flags2; 263 long f_spare2[14]; 264 long f_fsize; 265 long f_bsize; 266 long f_blocks; 267 long f_bfree; 268 long f_bavail; 269 long f_files; 270 long f_ffree; 271 }; 272 273 static int 274 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) 275 { 276 struct osf_stat tmp = { 0 }; 277 278 tmp.st_dev = lstat->dev; 279 tmp.st_mode = lstat->mode; 280 tmp.st_nlink = lstat->nlink; 281 tmp.st_uid = lstat->uid; 282 tmp.st_gid = lstat->gid; 283 tmp.st_rdev = lstat->rdev; 284 tmp.st_ldev = lstat->rdev; 285 tmp.st_size = lstat->size; 286 tmp.st_uatime = lstat->atime.tv_nsec / 1000; 287 tmp.st_umtime = lstat->mtime.tv_nsec / 1000; 288 tmp.st_uctime = lstat->ctime.tv_nsec / 1000; 289 tmp.st_ino = lstat->ino; 290 tmp.st_atime = lstat->atime.tv_sec; 291 tmp.st_mtime = lstat->mtime.tv_sec; 292 tmp.st_ctime = lstat->ctime.tv_sec; 293 tmp.st_blksize = lstat->blksize; 294 tmp.st_blocks = lstat->blocks; 295 296 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; 297 } 298 299 static int 300 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 301 unsigned long bufsiz) 302 { 303 struct osf_statfs tmp_stat; 304 305 tmp_stat.f_type = linux_stat->f_type; 306 tmp_stat.f_flags = 0; /* mount flags */ 307 tmp_stat.f_fsize = linux_stat->f_frsize; 308 tmp_stat.f_bsize = linux_stat->f_bsize; 309 tmp_stat.f_blocks = linux_stat->f_blocks; 310 tmp_stat.f_bfree = linux_stat->f_bfree; 311 tmp_stat.f_bavail = linux_stat->f_bavail; 312 tmp_stat.f_files = linux_stat->f_files; 313 tmp_stat.f_ffree = linux_stat->f_ffree; 314 tmp_stat.f_fsid = linux_stat->f_fsid; 315 if (bufsiz > sizeof(tmp_stat)) 316 bufsiz = sizeof(tmp_stat); 317 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 318 } 319 320 static int 321 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, 322 unsigned long bufsiz) 323 { 324 struct osf_statfs64 tmp_stat = { 0 }; 325 326 tmp_stat.f_type = linux_stat->f_type; 327 tmp_stat.f_fsize = linux_stat->f_frsize; 328 tmp_stat.f_bsize = linux_stat->f_bsize; 329 tmp_stat.f_blocks = linux_stat->f_blocks; 330 tmp_stat.f_bfree = linux_stat->f_bfree; 331 tmp_stat.f_bavail = linux_stat->f_bavail; 332 tmp_stat.f_files = linux_stat->f_files; 333 tmp_stat.f_ffree = linux_stat->f_ffree; 334 tmp_stat.f_fsid = linux_stat->f_fsid; 335 if (bufsiz > sizeof(tmp_stat)) 336 bufsiz = sizeof(tmp_stat); 337 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 338 } 339 340 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 341 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 342 { 343 struct kstatfs linux_stat; 344 int error = user_statfs(pathname, &linux_stat); 345 if (!error) 346 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 347 return error; 348 } 349 350 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) 351 { 352 struct kstat stat; 353 int error; 354 355 error = vfs_stat(name, &stat); 356 if (error) 357 return error; 358 359 return linux_to_osf_stat(&stat, buf); 360 } 361 362 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) 363 { 364 struct kstat stat; 365 int error; 366 367 error = vfs_lstat(name, &stat); 368 if (error) 369 return error; 370 371 return linux_to_osf_stat(&stat, buf); 372 } 373 374 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) 375 { 376 struct kstat stat; 377 int error; 378 379 error = vfs_fstat(fd, &stat); 380 if (error) 381 return error; 382 383 return linux_to_osf_stat(&stat, buf); 384 } 385 386 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 387 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 388 { 389 struct kstatfs linux_stat; 390 int error = fd_statfs(fd, &linux_stat); 391 if (!error) 392 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 393 return error; 394 } 395 396 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, 397 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 398 { 399 struct kstatfs linux_stat; 400 int error = user_statfs(pathname, &linux_stat); 401 if (!error) 402 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 403 return error; 404 } 405 406 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, 407 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 408 { 409 struct kstatfs linux_stat; 410 int error = fd_statfs(fd, &linux_stat); 411 if (!error) 412 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 413 return error; 414 } 415 416 /* 417 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 418 * 419 * Although to be frank, neither are the native Linux/i386 ones.. 420 */ 421 struct ufs_args { 422 char __user *devname; 423 int flags; 424 uid_t exroot; 425 }; 426 427 struct cdfs_args { 428 char __user *devname; 429 int flags; 430 uid_t exroot; 431 432 /* This has lots more here, which Linux handles with the option block 433 but I'm too lazy to do the translation into ASCII. */ 434 }; 435 436 struct procfs_args { 437 char __user *devname; 438 int flags; 439 uid_t exroot; 440 }; 441 442 /* 443 * We can't actually handle ufs yet, so we translate UFS mounts to 444 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 445 * layout is so braindead it's a major headache doing it. 446 * 447 * Just how long ago was it written? OTOH our UFS driver may be still 448 * unhappy with OSF UFS. [CHECKME] 449 */ 450 static int 451 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 452 { 453 int retval; 454 struct cdfs_args tmp; 455 char *devname; 456 457 retval = -EFAULT; 458 if (copy_from_user(&tmp, args, sizeof(tmp))) 459 goto out; 460 devname = getname(tmp.devname); 461 retval = PTR_ERR(devname); 462 if (IS_ERR(devname)) 463 goto out; 464 retval = do_mount(devname, dirname, "ext2", flags, NULL); 465 putname(devname); 466 out: 467 return retval; 468 } 469 470 static int 471 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 472 { 473 int retval; 474 struct cdfs_args tmp; 475 char *devname; 476 477 retval = -EFAULT; 478 if (copy_from_user(&tmp, args, sizeof(tmp))) 479 goto out; 480 devname = getname(tmp.devname); 481 retval = PTR_ERR(devname); 482 if (IS_ERR(devname)) 483 goto out; 484 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 485 putname(devname); 486 out: 487 return retval; 488 } 489 490 static int 491 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 492 { 493 struct procfs_args tmp; 494 495 if (copy_from_user(&tmp, args, sizeof(tmp))) 496 return -EFAULT; 497 498 return do_mount("", dirname, "proc", flags, NULL); 499 } 500 501 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 502 int, flag, void __user *, data) 503 { 504 int retval; 505 char *name; 506 507 name = getname(path); 508 retval = PTR_ERR(name); 509 if (IS_ERR(name)) 510 goto out; 511 switch (typenr) { 512 case 1: 513 retval = osf_ufs_mount(name, data, flag); 514 break; 515 case 6: 516 retval = osf_cdfs_mount(name, data, flag); 517 break; 518 case 9: 519 retval = osf_procfs_mount(name, data, flag); 520 break; 521 default: 522 retval = -EINVAL; 523 printk("osf_mount(%ld, %x)\n", typenr, flag); 524 } 525 putname(name); 526 out: 527 return retval; 528 } 529 530 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 531 { 532 int error; 533 534 down_read(&uts_sem); 535 error = -EFAULT; 536 if (copy_to_user(name + 0, utsname()->sysname, 32)) 537 goto out; 538 if (copy_to_user(name + 32, utsname()->nodename, 32)) 539 goto out; 540 if (copy_to_user(name + 64, utsname()->release, 32)) 541 goto out; 542 if (copy_to_user(name + 96, utsname()->version, 32)) 543 goto out; 544 if (copy_to_user(name + 128, utsname()->machine, 32)) 545 goto out; 546 547 error = 0; 548 out: 549 up_read(&uts_sem); 550 return error; 551 } 552 553 SYSCALL_DEFINE0(getpagesize) 554 { 555 return PAGE_SIZE; 556 } 557 558 SYSCALL_DEFINE0(getdtablesize) 559 { 560 return sysctl_nr_open; 561 } 562 563 /* 564 * For compatibility with OSF/1 only. Use utsname(2) instead. 565 */ 566 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 567 { 568 unsigned len; 569 int i; 570 571 if (!access_ok(VERIFY_WRITE, name, namelen)) 572 return -EFAULT; 573 574 len = namelen; 575 if (len > 32) 576 len = 32; 577 578 down_read(&uts_sem); 579 for (i = 0; i < len; ++i) { 580 __put_user(utsname()->domainname[i], name + i); 581 if (utsname()->domainname[i] == '\0') 582 break; 583 } 584 up_read(&uts_sem); 585 586 return 0; 587 } 588 589 /* 590 * The following stuff should move into a header file should it ever 591 * be labeled "officially supported." Right now, there is just enough 592 * support to avoid applications (such as tar) printing error 593 * messages. The attributes are not really implemented. 594 */ 595 596 /* 597 * Values for Property list entry flag 598 */ 599 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 600 by default */ 601 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 602 #define PLE_FLAG_ALL -1 /* All flag value */ 603 604 struct proplistname_args { 605 unsigned int pl_mask; 606 unsigned int pl_numnames; 607 char **pl_names; 608 }; 609 610 union pl_args { 611 struct setargs { 612 char __user *path; 613 long follow; 614 long nbytes; 615 char __user *buf; 616 } set; 617 struct fsetargs { 618 long fd; 619 long nbytes; 620 char __user *buf; 621 } fset; 622 struct getargs { 623 char __user *path; 624 long follow; 625 struct proplistname_args __user *name_args; 626 long nbytes; 627 char __user *buf; 628 int __user *min_buf_size; 629 } get; 630 struct fgetargs { 631 long fd; 632 struct proplistname_args __user *name_args; 633 long nbytes; 634 char __user *buf; 635 int __user *min_buf_size; 636 } fget; 637 struct delargs { 638 char __user *path; 639 long follow; 640 struct proplistname_args __user *name_args; 641 } del; 642 struct fdelargs { 643 long fd; 644 struct proplistname_args __user *name_args; 645 } fdel; 646 }; 647 648 enum pl_code { 649 PL_SET = 1, PL_FSET = 2, 650 PL_GET = 3, PL_FGET = 4, 651 PL_DEL = 5, PL_FDEL = 6 652 }; 653 654 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 655 union pl_args __user *, args) 656 { 657 long error; 658 int __user *min_buf_size_ptr; 659 660 switch (code) { 661 case PL_SET: 662 if (get_user(error, &args->set.nbytes)) 663 error = -EFAULT; 664 break; 665 case PL_FSET: 666 if (get_user(error, &args->fset.nbytes)) 667 error = -EFAULT; 668 break; 669 case PL_GET: 670 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 671 if (error) 672 break; 673 error = put_user(0, min_buf_size_ptr); 674 break; 675 case PL_FGET: 676 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 677 if (error) 678 break; 679 error = put_user(0, min_buf_size_ptr); 680 break; 681 case PL_DEL: 682 case PL_FDEL: 683 error = 0; 684 break; 685 default: 686 error = -EOPNOTSUPP; 687 break; 688 }; 689 return error; 690 } 691 692 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 693 struct sigstack __user *, uoss) 694 { 695 unsigned long usp = rdusp(); 696 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 697 unsigned long oss_os = on_sig_stack(usp); 698 int error; 699 700 if (uss) { 701 void __user *ss_sp; 702 703 error = -EFAULT; 704 if (get_user(ss_sp, &uss->ss_sp)) 705 goto out; 706 707 /* If the current stack was set with sigaltstack, don't 708 swap stacks while we are on it. */ 709 error = -EPERM; 710 if (current->sas_ss_sp && on_sig_stack(usp)) 711 goto out; 712 713 /* Since we don't know the extent of the stack, and we don't 714 track onstack-ness, but rather calculate it, we must 715 presume a size. Ho hum this interface is lossy. */ 716 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 717 current->sas_ss_size = SIGSTKSZ; 718 } 719 720 if (uoss) { 721 error = -EFAULT; 722 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 723 || __put_user(oss_sp, &uoss->ss_sp) 724 || __put_user(oss_os, &uoss->ss_onstack)) 725 goto out; 726 } 727 728 error = 0; 729 out: 730 return error; 731 } 732 733 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 734 { 735 const char *sysinfo_table[] = { 736 utsname()->sysname, 737 utsname()->nodename, 738 utsname()->release, 739 utsname()->version, 740 utsname()->machine, 741 "alpha", /* instruction set architecture */ 742 "dummy", /* hardware serial number */ 743 "dummy", /* hardware manufacturer */ 744 "dummy", /* secure RPC domain */ 745 }; 746 unsigned long offset; 747 const char *res; 748 long len, err = -EINVAL; 749 750 offset = command-1; 751 if (offset >= ARRAY_SIZE(sysinfo_table)) { 752 /* Digital UNIX has a few unpublished interfaces here */ 753 printk("sysinfo(%d)", command); 754 goto out; 755 } 756 757 down_read(&uts_sem); 758 res = sysinfo_table[offset]; 759 len = strlen(res)+1; 760 if ((unsigned long)len > (unsigned long)count) 761 len = count; 762 if (copy_to_user(buf, res, len)) 763 err = -EFAULT; 764 else 765 err = 0; 766 up_read(&uts_sem); 767 out: 768 return err; 769 } 770 771 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 772 unsigned long, nbytes, int __user *, start, void __user *, arg) 773 { 774 unsigned long w; 775 struct percpu_struct *cpu; 776 777 switch (op) { 778 case GSI_IEEE_FP_CONTROL: 779 /* Return current software fp control & status bits. */ 780 /* Note that DU doesn't verify available space here. */ 781 782 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 783 w = swcr_update_status(w, rdfpcr()); 784 if (put_user(w, (unsigned long __user *) buffer)) 785 return -EFAULT; 786 return 0; 787 788 case GSI_IEEE_STATE_AT_SIGNAL: 789 /* 790 * Not sure anybody will ever use this weird stuff. These 791 * ops can be used (under OSF/1) to set the fpcr that should 792 * be used when a signal handler starts executing. 793 */ 794 break; 795 796 case GSI_UACPROC: 797 if (nbytes < sizeof(unsigned int)) 798 return -EINVAL; 799 w = (current_thread_info()->flags >> ALPHA_UAC_SHIFT) & 800 UAC_BITMASK; 801 if (put_user(w, (unsigned int __user *)buffer)) 802 return -EFAULT; 803 return 1; 804 805 case GSI_PROC_TYPE: 806 if (nbytes < sizeof(unsigned long)) 807 return -EINVAL; 808 cpu = (struct percpu_struct*) 809 ((char*)hwrpb + hwrpb->processor_offset); 810 w = cpu->type; 811 if (put_user(w, (unsigned long __user*)buffer)) 812 return -EFAULT; 813 return 1; 814 815 case GSI_GET_HWRPB: 816 if (nbytes > sizeof(*hwrpb)) 817 return -EINVAL; 818 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 819 return -EFAULT; 820 return 1; 821 822 default: 823 break; 824 } 825 826 return -EOPNOTSUPP; 827 } 828 829 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 830 unsigned long, nbytes, int __user *, start, void __user *, arg) 831 { 832 switch (op) { 833 case SSI_IEEE_FP_CONTROL: { 834 unsigned long swcr, fpcr; 835 unsigned int *state; 836 837 /* 838 * Alpha Architecture Handbook 4.7.7.3: 839 * To be fully IEEE compiant, we must track the current IEEE 840 * exception state in software, because spurious bits can be 841 * set in the trap shadow of a software-complete insn. 842 */ 843 844 if (get_user(swcr, (unsigned long __user *)buffer)) 845 return -EFAULT; 846 state = ¤t_thread_info()->ieee_state; 847 848 /* Update softare trap enable bits. */ 849 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 850 851 /* Update the real fpcr. */ 852 fpcr = rdfpcr() & FPCR_DYN_MASK; 853 fpcr |= ieee_swcr_to_fpcr(swcr); 854 wrfpcr(fpcr); 855 856 return 0; 857 } 858 859 case SSI_IEEE_RAISE_EXCEPTION: { 860 unsigned long exc, swcr, fpcr, fex; 861 unsigned int *state; 862 863 if (get_user(exc, (unsigned long __user *)buffer)) 864 return -EFAULT; 865 state = ¤t_thread_info()->ieee_state; 866 exc &= IEEE_STATUS_MASK; 867 868 /* Update softare trap enable bits. */ 869 swcr = (*state & IEEE_SW_MASK) | exc; 870 *state |= exc; 871 872 /* Update the real fpcr. */ 873 fpcr = rdfpcr(); 874 fpcr |= ieee_swcr_to_fpcr(swcr); 875 wrfpcr(fpcr); 876 877 /* If any exceptions set by this call, and are unmasked, 878 send a signal. Old exceptions are not signaled. */ 879 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 880 if (fex) { 881 siginfo_t info; 882 int si_code = 0; 883 884 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 885 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 886 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 887 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 888 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 889 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 890 891 info.si_signo = SIGFPE; 892 info.si_errno = 0; 893 info.si_code = si_code; 894 info.si_addr = NULL; /* FIXME */ 895 send_sig_info(SIGFPE, &info, current); 896 } 897 return 0; 898 } 899 900 case SSI_IEEE_STATE_AT_SIGNAL: 901 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 902 /* 903 * Not sure anybody will ever use this weird stuff. These 904 * ops can be used (under OSF/1) to set the fpcr that should 905 * be used when a signal handler starts executing. 906 */ 907 break; 908 909 case SSI_NVPAIRS: { 910 unsigned long v, w, i; 911 unsigned int old, new; 912 913 for (i = 0; i < nbytes; ++i) { 914 915 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 916 return -EFAULT; 917 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 918 return -EFAULT; 919 switch (v) { 920 case SSIN_UACPROC: 921 again: 922 old = current_thread_info()->flags; 923 new = old & ~(UAC_BITMASK << ALPHA_UAC_SHIFT); 924 new = new | (w & UAC_BITMASK) << ALPHA_UAC_SHIFT; 925 if (cmpxchg(¤t_thread_info()->flags, 926 old, new) != old) 927 goto again; 928 break; 929 930 default: 931 return -EOPNOTSUPP; 932 } 933 } 934 return 0; 935 } 936 937 case SSI_LMF: 938 return 0; 939 940 default: 941 break; 942 } 943 944 return -EOPNOTSUPP; 945 } 946 947 /* Translations due to the fact that OSF's time_t is an int. Which 948 affects all sorts of things, like timeval and itimerval. */ 949 950 extern struct timezone sys_tz; 951 952 struct timeval32 953 { 954 int tv_sec, tv_usec; 955 }; 956 957 struct itimerval32 958 { 959 struct timeval32 it_interval; 960 struct timeval32 it_value; 961 }; 962 963 static inline long 964 get_tv32(struct timeval *o, struct timeval32 __user *i) 965 { 966 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 967 (__get_user(o->tv_sec, &i->tv_sec) | 968 __get_user(o->tv_usec, &i->tv_usec))); 969 } 970 971 static inline long 972 put_tv32(struct timeval32 __user *o, struct timeval *i) 973 { 974 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 975 (__put_user(i->tv_sec, &o->tv_sec) | 976 __put_user(i->tv_usec, &o->tv_usec))); 977 } 978 979 static inline long 980 get_it32(struct itimerval *o, struct itimerval32 __user *i) 981 { 982 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 983 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 984 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 985 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 986 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 987 } 988 989 static inline long 990 put_it32(struct itimerval32 __user *o, struct itimerval *i) 991 { 992 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 993 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 994 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 995 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 996 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 997 } 998 999 static inline void 1000 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 1001 { 1002 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 1003 value->tv_sec = jiffies / HZ; 1004 } 1005 1006 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 1007 struct timezone __user *, tz) 1008 { 1009 if (tv) { 1010 struct timeval ktv; 1011 do_gettimeofday(&ktv); 1012 if (put_tv32(tv, &ktv)) 1013 return -EFAULT; 1014 } 1015 if (tz) { 1016 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 1017 return -EFAULT; 1018 } 1019 return 0; 1020 } 1021 1022 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 1023 struct timezone __user *, tz) 1024 { 1025 struct timespec kts; 1026 struct timezone ktz; 1027 1028 if (tv) { 1029 if (get_tv32((struct timeval *)&kts, tv)) 1030 return -EFAULT; 1031 } 1032 if (tz) { 1033 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1034 return -EFAULT; 1035 } 1036 1037 kts.tv_nsec *= 1000; 1038 1039 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 1040 } 1041 1042 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 1043 { 1044 struct itimerval kit; 1045 int error; 1046 1047 error = do_getitimer(which, &kit); 1048 if (!error && put_it32(it, &kit)) 1049 error = -EFAULT; 1050 1051 return error; 1052 } 1053 1054 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 1055 struct itimerval32 __user *, out) 1056 { 1057 struct itimerval kin, kout; 1058 int error; 1059 1060 if (in) { 1061 if (get_it32(&kin, in)) 1062 return -EFAULT; 1063 } else 1064 memset(&kin, 0, sizeof(kin)); 1065 1066 error = do_setitimer(which, &kin, out ? &kout : NULL); 1067 if (error || !out) 1068 return error; 1069 1070 if (put_it32(out, &kout)) 1071 return -EFAULT; 1072 1073 return 0; 1074 1075 } 1076 1077 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1078 struct timeval32 __user *, tvs) 1079 { 1080 struct timespec tv[2]; 1081 1082 if (tvs) { 1083 struct timeval ktvs[2]; 1084 if (get_tv32(&ktvs[0], &tvs[0]) || 1085 get_tv32(&ktvs[1], &tvs[1])) 1086 return -EFAULT; 1087 1088 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 1089 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 1090 return -EINVAL; 1091 1092 tv[0].tv_sec = ktvs[0].tv_sec; 1093 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 1094 tv[1].tv_sec = ktvs[1].tv_sec; 1095 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 1096 } 1097 1098 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1099 } 1100 1101 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1102 fd_set __user *, exp, struct timeval32 __user *, tvp) 1103 { 1104 struct timespec end_time, *to = NULL; 1105 if (tvp) { 1106 time_t sec, usec; 1107 1108 to = &end_time; 1109 1110 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 1111 || __get_user(sec, &tvp->tv_sec) 1112 || __get_user(usec, &tvp->tv_usec)) { 1113 return -EFAULT; 1114 } 1115 1116 if (sec < 0 || usec < 0) 1117 return -EINVAL; 1118 1119 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 1120 return -EINVAL; 1121 1122 } 1123 1124 /* OSF does not copy back the remaining time. */ 1125 return core_sys_select(n, inp, outp, exp, to); 1126 } 1127 1128 struct rusage32 { 1129 struct timeval32 ru_utime; /* user time used */ 1130 struct timeval32 ru_stime; /* system time used */ 1131 long ru_maxrss; /* maximum resident set size */ 1132 long ru_ixrss; /* integral shared memory size */ 1133 long ru_idrss; /* integral unshared data size */ 1134 long ru_isrss; /* integral unshared stack size */ 1135 long ru_minflt; /* page reclaims */ 1136 long ru_majflt; /* page faults */ 1137 long ru_nswap; /* swaps */ 1138 long ru_inblock; /* block input operations */ 1139 long ru_oublock; /* block output operations */ 1140 long ru_msgsnd; /* messages sent */ 1141 long ru_msgrcv; /* messages received */ 1142 long ru_nsignals; /* signals received */ 1143 long ru_nvcsw; /* voluntary context switches */ 1144 long ru_nivcsw; /* involuntary " */ 1145 }; 1146 1147 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1148 { 1149 struct rusage32 r; 1150 1151 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1152 return -EINVAL; 1153 1154 memset(&r, 0, sizeof(r)); 1155 switch (who) { 1156 case RUSAGE_SELF: 1157 jiffies_to_timeval32(current->utime, &r.ru_utime); 1158 jiffies_to_timeval32(current->stime, &r.ru_stime); 1159 r.ru_minflt = current->min_flt; 1160 r.ru_majflt = current->maj_flt; 1161 break; 1162 case RUSAGE_CHILDREN: 1163 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1164 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1165 r.ru_minflt = current->signal->cmin_flt; 1166 r.ru_majflt = current->signal->cmaj_flt; 1167 break; 1168 } 1169 1170 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1171 } 1172 1173 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1174 struct rusage32 __user *, ur) 1175 { 1176 struct rusage r; 1177 long ret, err; 1178 unsigned int status = 0; 1179 mm_segment_t old_fs; 1180 1181 if (!ur) 1182 return sys_wait4(pid, ustatus, options, NULL); 1183 1184 old_fs = get_fs(); 1185 1186 set_fs (KERNEL_DS); 1187 ret = sys_wait4(pid, (unsigned int __user *) &status, options, 1188 (struct rusage __user *) &r); 1189 set_fs (old_fs); 1190 1191 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1192 return -EFAULT; 1193 1194 err = 0; 1195 err |= put_user(status, ustatus); 1196 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1197 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1198 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1199 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1200 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1201 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1202 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1203 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1204 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1205 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1206 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1207 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1208 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1209 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1210 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1211 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1212 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1213 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1214 1215 return err ? err : ret; 1216 } 1217 1218 /* 1219 * I don't know what the parameters are: the first one 1220 * seems to be a timeval pointer, and I suspect the second 1221 * one is the time remaining.. Ho humm.. No documentation. 1222 */ 1223 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1224 struct timeval32 __user *, remain) 1225 { 1226 struct timeval tmp; 1227 unsigned long ticks; 1228 1229 if (get_tv32(&tmp, sleep)) 1230 goto fault; 1231 1232 ticks = timeval_to_jiffies(&tmp); 1233 1234 ticks = schedule_timeout_interruptible(ticks); 1235 1236 if (remain) { 1237 jiffies_to_timeval(ticks, &tmp); 1238 if (put_tv32(remain, &tmp)) 1239 goto fault; 1240 } 1241 1242 return 0; 1243 fault: 1244 return -EFAULT; 1245 } 1246 1247 1248 struct timex32 { 1249 unsigned int modes; /* mode selector */ 1250 long offset; /* time offset (usec) */ 1251 long freq; /* frequency offset (scaled ppm) */ 1252 long maxerror; /* maximum error (usec) */ 1253 long esterror; /* estimated error (usec) */ 1254 int status; /* clock command/status */ 1255 long constant; /* pll time constant */ 1256 long precision; /* clock precision (usec) (read only) */ 1257 long tolerance; /* clock frequency tolerance (ppm) 1258 * (read only) 1259 */ 1260 struct timeval32 time; /* (read only) */ 1261 long tick; /* (modified) usecs between clock ticks */ 1262 1263 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1264 long jitter; /* pps jitter (us) (ro) */ 1265 int shift; /* interval duration (s) (shift) (ro) */ 1266 long stabil; /* pps stability (scaled ppm) (ro) */ 1267 long jitcnt; /* jitter limit exceeded (ro) */ 1268 long calcnt; /* calibration intervals (ro) */ 1269 long errcnt; /* calibration errors (ro) */ 1270 long stbcnt; /* stability limit exceeded (ro) */ 1271 1272 int :32; int :32; int :32; int :32; 1273 int :32; int :32; int :32; int :32; 1274 int :32; int :32; int :32; int :32; 1275 }; 1276 1277 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1278 { 1279 struct timex txc; 1280 int ret; 1281 1282 /* copy relevant bits of struct timex. */ 1283 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1284 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1285 offsetof(struct timex32, time))) 1286 return -EFAULT; 1287 1288 ret = do_adjtimex(&txc); 1289 if (ret < 0) 1290 return ret; 1291 1292 /* copy back to timex32 */ 1293 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1294 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1295 offsetof(struct timex32, tick))) || 1296 (put_tv32(&txc_p->time, &txc.time))) 1297 return -EFAULT; 1298 1299 return ret; 1300 } 1301 1302 /* Get an address range which is currently unmapped. Similar to the 1303 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1304 1305 static unsigned long 1306 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1307 unsigned long limit) 1308 { 1309 struct vm_area_struct *vma = find_vma(current->mm, addr); 1310 1311 while (1) { 1312 /* At this point: (!vma || addr < vma->vm_end). */ 1313 if (limit - len < addr) 1314 return -ENOMEM; 1315 if (!vma || addr + len <= vma->vm_start) 1316 return addr; 1317 addr = vma->vm_end; 1318 vma = vma->vm_next; 1319 } 1320 } 1321 1322 unsigned long 1323 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1324 unsigned long len, unsigned long pgoff, 1325 unsigned long flags) 1326 { 1327 unsigned long limit; 1328 1329 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1330 if (current->personality & ADDR_LIMIT_32BIT) 1331 limit = 0x80000000; 1332 else 1333 limit = TASK_SIZE; 1334 1335 if (len > limit) 1336 return -ENOMEM; 1337 1338 if (flags & MAP_FIXED) 1339 return addr; 1340 1341 /* First, see if the given suggestion fits. 1342 1343 The OSF/1 loader (/sbin/loader) relies on us returning an 1344 address larger than the requested if one exists, which is 1345 a terribly broken way to program. 1346 1347 That said, I can see the use in being able to suggest not 1348 merely specific addresses, but regions of memory -- perhaps 1349 this feature should be incorporated into all ports? */ 1350 1351 if (addr) { 1352 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1353 if (addr != (unsigned long) -ENOMEM) 1354 return addr; 1355 } 1356 1357 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1358 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1359 len, limit); 1360 if (addr != (unsigned long) -ENOMEM) 1361 return addr; 1362 1363 /* Finally, try allocating in low memory. */ 1364 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1365 1366 return addr; 1367 } 1368 1369 #ifdef CONFIG_OSF4_COMPAT 1370 1371 /* Clear top 32 bits of iov_len in the user's buffer for 1372 compatibility with old versions of OSF/1 where iov_len 1373 was defined as int. */ 1374 static int 1375 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1376 { 1377 unsigned long i; 1378 1379 for (i = 0 ; i < count ; i++) { 1380 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1381 1382 if (put_user(0, iov_len_high)) 1383 return -EFAULT; 1384 } 1385 return 0; 1386 } 1387 1388 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1389 const struct iovec __user *, vector, unsigned long, count) 1390 { 1391 if (unlikely(personality(current->personality) == PER_OSF4)) 1392 if (osf_fix_iov_len(vector, count)) 1393 return -EFAULT; 1394 return sys_readv(fd, vector, count); 1395 } 1396 1397 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1398 const struct iovec __user *, vector, unsigned long, count) 1399 { 1400 if (unlikely(personality(current->personality) == PER_OSF4)) 1401 if (osf_fix_iov_len(vector, count)) 1402 return -EFAULT; 1403 return sys_writev(fd, vector, count); 1404 } 1405 1406 #endif 1407