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 dir_context ctx; 100 struct osf_dirent __user *dirent; 101 long __user *basep; 102 unsigned int count; 103 int error; 104 }; 105 106 static int 107 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 108 u64 ino, unsigned int d_type) 109 { 110 struct osf_dirent __user *dirent; 111 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 112 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 113 unsigned int d_ino; 114 115 buf->error = -EINVAL; /* only used if we fail */ 116 if (reclen > buf->count) 117 return -EINVAL; 118 d_ino = ino; 119 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 120 buf->error = -EOVERFLOW; 121 return -EOVERFLOW; 122 } 123 if (buf->basep) { 124 if (put_user(offset, buf->basep)) 125 goto Efault; 126 buf->basep = NULL; 127 } 128 dirent = buf->dirent; 129 if (put_user(d_ino, &dirent->d_ino) || 130 put_user(namlen, &dirent->d_namlen) || 131 put_user(reclen, &dirent->d_reclen) || 132 copy_to_user(dirent->d_name, name, namlen) || 133 put_user(0, dirent->d_name + namlen)) 134 goto Efault; 135 dirent = (void __user *)dirent + reclen; 136 buf->dirent = dirent; 137 buf->count -= reclen; 138 return 0; 139 Efault: 140 buf->error = -EFAULT; 141 return -EFAULT; 142 } 143 144 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 145 struct osf_dirent __user *, dirent, unsigned int, count, 146 long __user *, basep) 147 { 148 int error; 149 struct fd arg = fdget(fd); 150 struct osf_dirent_callback buf = { 151 .ctx.actor = osf_filldir, 152 .dirent = dirent, 153 .basep = basep, 154 .count = count 155 }; 156 157 if (!arg.file) 158 return -EBADF; 159 160 error = iterate_dir(arg.file, &buf.ctx); 161 if (error >= 0) 162 error = buf.error; 163 if (count != buf.count) 164 error = count - buf.count; 165 166 fdput(arg); 167 return error; 168 } 169 170 #undef NAME_OFFSET 171 172 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 173 unsigned long, prot, unsigned long, flags, unsigned long, fd, 174 unsigned long, off) 175 { 176 unsigned long ret = -EINVAL; 177 178 #if 0 179 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 180 printk("%s: unimplemented OSF mmap flags %04lx\n", 181 current->comm, flags); 182 #endif 183 if ((off + PAGE_ALIGN(len)) < off) 184 goto out; 185 if (off & ~PAGE_MASK) 186 goto out; 187 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 188 out: 189 return ret; 190 } 191 192 struct osf_stat { 193 int st_dev; 194 int st_pad1; 195 unsigned st_mode; 196 unsigned short st_nlink; 197 short st_nlink_reserved; 198 unsigned st_uid; 199 unsigned st_gid; 200 int st_rdev; 201 int st_ldev; 202 long st_size; 203 int st_pad2; 204 int st_uatime; 205 int st_pad3; 206 int st_umtime; 207 int st_pad4; 208 int st_uctime; 209 int st_pad5; 210 int st_pad6; 211 unsigned st_flags; 212 unsigned st_gen; 213 long st_spare[4]; 214 unsigned st_ino; 215 int st_ino_reserved; 216 int st_atime; 217 int st_atime_reserved; 218 int st_mtime; 219 int st_mtime_reserved; 220 int st_ctime; 221 int st_ctime_reserved; 222 long st_blksize; 223 long st_blocks; 224 }; 225 226 /* 227 * The OSF/1 statfs structure is much larger, but this should 228 * match the beginning, at least. 229 */ 230 struct osf_statfs { 231 short f_type; 232 short f_flags; 233 int f_fsize; 234 int f_bsize; 235 int f_blocks; 236 int f_bfree; 237 int f_bavail; 238 int f_files; 239 int f_ffree; 240 __kernel_fsid_t f_fsid; 241 }; 242 243 struct osf_statfs64 { 244 short f_type; 245 short f_flags; 246 int f_pad1; 247 int f_pad2; 248 int f_pad3; 249 int f_pad4; 250 int f_pad5; 251 int f_pad6; 252 int f_pad7; 253 __kernel_fsid_t f_fsid; 254 u_short f_namemax; 255 short f_reserved1; 256 int f_spare[8]; 257 char f_pad8[90]; 258 char f_pad9[90]; 259 long mount_info[10]; 260 u_long f_flags2; 261 long f_spare2[14]; 262 long f_fsize; 263 long f_bsize; 264 long f_blocks; 265 long f_bfree; 266 long f_bavail; 267 long f_files; 268 long f_ffree; 269 }; 270 271 static int 272 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) 273 { 274 struct osf_stat tmp = { 0 }; 275 276 tmp.st_dev = lstat->dev; 277 tmp.st_mode = lstat->mode; 278 tmp.st_nlink = lstat->nlink; 279 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid); 280 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid); 281 tmp.st_rdev = lstat->rdev; 282 tmp.st_ldev = lstat->rdev; 283 tmp.st_size = lstat->size; 284 tmp.st_uatime = lstat->atime.tv_nsec / 1000; 285 tmp.st_umtime = lstat->mtime.tv_nsec / 1000; 286 tmp.st_uctime = lstat->ctime.tv_nsec / 1000; 287 tmp.st_ino = lstat->ino; 288 tmp.st_atime = lstat->atime.tv_sec; 289 tmp.st_mtime = lstat->mtime.tv_sec; 290 tmp.st_ctime = lstat->ctime.tv_sec; 291 tmp.st_blksize = lstat->blksize; 292 tmp.st_blocks = lstat->blocks; 293 294 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; 295 } 296 297 static int 298 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 299 unsigned long bufsiz) 300 { 301 struct osf_statfs tmp_stat; 302 303 tmp_stat.f_type = linux_stat->f_type; 304 tmp_stat.f_flags = 0; /* mount flags */ 305 tmp_stat.f_fsize = linux_stat->f_frsize; 306 tmp_stat.f_bsize = linux_stat->f_bsize; 307 tmp_stat.f_blocks = linux_stat->f_blocks; 308 tmp_stat.f_bfree = linux_stat->f_bfree; 309 tmp_stat.f_bavail = linux_stat->f_bavail; 310 tmp_stat.f_files = linux_stat->f_files; 311 tmp_stat.f_ffree = linux_stat->f_ffree; 312 tmp_stat.f_fsid = linux_stat->f_fsid; 313 if (bufsiz > sizeof(tmp_stat)) 314 bufsiz = sizeof(tmp_stat); 315 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 316 } 317 318 static int 319 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, 320 unsigned long bufsiz) 321 { 322 struct osf_statfs64 tmp_stat = { 0 }; 323 324 tmp_stat.f_type = linux_stat->f_type; 325 tmp_stat.f_fsize = linux_stat->f_frsize; 326 tmp_stat.f_bsize = linux_stat->f_bsize; 327 tmp_stat.f_blocks = linux_stat->f_blocks; 328 tmp_stat.f_bfree = linux_stat->f_bfree; 329 tmp_stat.f_bavail = linux_stat->f_bavail; 330 tmp_stat.f_files = linux_stat->f_files; 331 tmp_stat.f_ffree = linux_stat->f_ffree; 332 tmp_stat.f_fsid = linux_stat->f_fsid; 333 if (bufsiz > sizeof(tmp_stat)) 334 bufsiz = sizeof(tmp_stat); 335 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 336 } 337 338 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 339 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 340 { 341 struct kstatfs linux_stat; 342 int error = user_statfs(pathname, &linux_stat); 343 if (!error) 344 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 345 return error; 346 } 347 348 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) 349 { 350 struct kstat stat; 351 int error; 352 353 error = vfs_stat(name, &stat); 354 if (error) 355 return error; 356 357 return linux_to_osf_stat(&stat, buf); 358 } 359 360 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) 361 { 362 struct kstat stat; 363 int error; 364 365 error = vfs_lstat(name, &stat); 366 if (error) 367 return error; 368 369 return linux_to_osf_stat(&stat, buf); 370 } 371 372 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) 373 { 374 struct kstat stat; 375 int error; 376 377 error = vfs_fstat(fd, &stat); 378 if (error) 379 return error; 380 381 return linux_to_osf_stat(&stat, buf); 382 } 383 384 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 385 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 386 { 387 struct kstatfs linux_stat; 388 int error = fd_statfs(fd, &linux_stat); 389 if (!error) 390 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 391 return error; 392 } 393 394 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, 395 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 396 { 397 struct kstatfs linux_stat; 398 int error = user_statfs(pathname, &linux_stat); 399 if (!error) 400 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 401 return error; 402 } 403 404 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, 405 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 406 { 407 struct kstatfs linux_stat; 408 int error = fd_statfs(fd, &linux_stat); 409 if (!error) 410 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 411 return error; 412 } 413 414 /* 415 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 416 * 417 * Although to be frank, neither are the native Linux/i386 ones.. 418 */ 419 struct ufs_args { 420 char __user *devname; 421 int flags; 422 uid_t exroot; 423 }; 424 425 struct cdfs_args { 426 char __user *devname; 427 int flags; 428 uid_t exroot; 429 430 /* This has lots more here, which Linux handles with the option block 431 but I'm too lazy to do the translation into ASCII. */ 432 }; 433 434 struct procfs_args { 435 char __user *devname; 436 int flags; 437 uid_t exroot; 438 }; 439 440 /* 441 * We can't actually handle ufs yet, so we translate UFS mounts to 442 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 443 * layout is so braindead it's a major headache doing it. 444 * 445 * Just how long ago was it written? OTOH our UFS driver may be still 446 * unhappy with OSF UFS. [CHECKME] 447 */ 448 static int 449 osf_ufs_mount(const char __user *dirname, 450 struct ufs_args __user *args, int flags) 451 { 452 int retval; 453 struct cdfs_args tmp; 454 struct filename *devname; 455 456 retval = -EFAULT; 457 if (copy_from_user(&tmp, args, sizeof(tmp))) 458 goto out; 459 devname = getname(tmp.devname); 460 retval = PTR_ERR(devname); 461 if (IS_ERR(devname)) 462 goto out; 463 retval = do_mount(devname->name, dirname, "ext2", flags, NULL); 464 putname(devname); 465 out: 466 return retval; 467 } 468 469 static int 470 osf_cdfs_mount(const char __user *dirname, 471 struct cdfs_args __user *args, int flags) 472 { 473 int retval; 474 struct cdfs_args tmp; 475 struct filename *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->name, dirname, "iso9660", flags, NULL); 485 putname(devname); 486 out: 487 return retval; 488 } 489 490 static int 491 osf_procfs_mount(const char __user *dirname, 492 struct procfs_args __user *args, int flags) 493 { 494 struct procfs_args tmp; 495 496 if (copy_from_user(&tmp, args, sizeof(tmp))) 497 return -EFAULT; 498 499 return do_mount("", dirname, "proc", flags, NULL); 500 } 501 502 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 503 int, flag, void __user *, data) 504 { 505 int retval; 506 507 switch (typenr) { 508 case 1: 509 retval = osf_ufs_mount(path, data, flag); 510 break; 511 case 6: 512 retval = osf_cdfs_mount(path, data, flag); 513 break; 514 case 9: 515 retval = osf_procfs_mount(path, data, flag); 516 break; 517 default: 518 retval = -EINVAL; 519 printk("osf_mount(%ld, %x)\n", typenr, flag); 520 } 521 522 return retval; 523 } 524 525 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 526 { 527 int error; 528 529 down_read(&uts_sem); 530 error = -EFAULT; 531 if (copy_to_user(name + 0, utsname()->sysname, 32)) 532 goto out; 533 if (copy_to_user(name + 32, utsname()->nodename, 32)) 534 goto out; 535 if (copy_to_user(name + 64, utsname()->release, 32)) 536 goto out; 537 if (copy_to_user(name + 96, utsname()->version, 32)) 538 goto out; 539 if (copy_to_user(name + 128, utsname()->machine, 32)) 540 goto out; 541 542 error = 0; 543 out: 544 up_read(&uts_sem); 545 return error; 546 } 547 548 SYSCALL_DEFINE0(getpagesize) 549 { 550 return PAGE_SIZE; 551 } 552 553 SYSCALL_DEFINE0(getdtablesize) 554 { 555 return sysctl_nr_open; 556 } 557 558 /* 559 * For compatibility with OSF/1 only. Use utsname(2) instead. 560 */ 561 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 562 { 563 unsigned len; 564 int i; 565 566 if (!access_ok(VERIFY_WRITE, name, namelen)) 567 return -EFAULT; 568 569 len = namelen; 570 if (len > 32) 571 len = 32; 572 573 down_read(&uts_sem); 574 for (i = 0; i < len; ++i) { 575 __put_user(utsname()->domainname[i], name + i); 576 if (utsname()->domainname[i] == '\0') 577 break; 578 } 579 up_read(&uts_sem); 580 581 return 0; 582 } 583 584 /* 585 * The following stuff should move into a header file should it ever 586 * be labeled "officially supported." Right now, there is just enough 587 * support to avoid applications (such as tar) printing error 588 * messages. The attributes are not really implemented. 589 */ 590 591 /* 592 * Values for Property list entry flag 593 */ 594 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 595 by default */ 596 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 597 #define PLE_FLAG_ALL -1 /* All flag value */ 598 599 struct proplistname_args { 600 unsigned int pl_mask; 601 unsigned int pl_numnames; 602 char **pl_names; 603 }; 604 605 union pl_args { 606 struct setargs { 607 char __user *path; 608 long follow; 609 long nbytes; 610 char __user *buf; 611 } set; 612 struct fsetargs { 613 long fd; 614 long nbytes; 615 char __user *buf; 616 } fset; 617 struct getargs { 618 char __user *path; 619 long follow; 620 struct proplistname_args __user *name_args; 621 long nbytes; 622 char __user *buf; 623 int __user *min_buf_size; 624 } get; 625 struct fgetargs { 626 long fd; 627 struct proplistname_args __user *name_args; 628 long nbytes; 629 char __user *buf; 630 int __user *min_buf_size; 631 } fget; 632 struct delargs { 633 char __user *path; 634 long follow; 635 struct proplistname_args __user *name_args; 636 } del; 637 struct fdelargs { 638 long fd; 639 struct proplistname_args __user *name_args; 640 } fdel; 641 }; 642 643 enum pl_code { 644 PL_SET = 1, PL_FSET = 2, 645 PL_GET = 3, PL_FGET = 4, 646 PL_DEL = 5, PL_FDEL = 6 647 }; 648 649 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 650 union pl_args __user *, args) 651 { 652 long error; 653 int __user *min_buf_size_ptr; 654 655 switch (code) { 656 case PL_SET: 657 if (get_user(error, &args->set.nbytes)) 658 error = -EFAULT; 659 break; 660 case PL_FSET: 661 if (get_user(error, &args->fset.nbytes)) 662 error = -EFAULT; 663 break; 664 case PL_GET: 665 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 666 if (error) 667 break; 668 error = put_user(0, min_buf_size_ptr); 669 break; 670 case PL_FGET: 671 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 672 if (error) 673 break; 674 error = put_user(0, min_buf_size_ptr); 675 break; 676 case PL_DEL: 677 case PL_FDEL: 678 error = 0; 679 break; 680 default: 681 error = -EOPNOTSUPP; 682 break; 683 }; 684 return error; 685 } 686 687 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 688 struct sigstack __user *, uoss) 689 { 690 unsigned long usp = rdusp(); 691 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 692 unsigned long oss_os = on_sig_stack(usp); 693 int error; 694 695 if (uss) { 696 void __user *ss_sp; 697 698 error = -EFAULT; 699 if (get_user(ss_sp, &uss->ss_sp)) 700 goto out; 701 702 /* If the current stack was set with sigaltstack, don't 703 swap stacks while we are on it. */ 704 error = -EPERM; 705 if (current->sas_ss_sp && on_sig_stack(usp)) 706 goto out; 707 708 /* Since we don't know the extent of the stack, and we don't 709 track onstack-ness, but rather calculate it, we must 710 presume a size. Ho hum this interface is lossy. */ 711 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 712 current->sas_ss_size = SIGSTKSZ; 713 } 714 715 if (uoss) { 716 error = -EFAULT; 717 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 718 || __put_user(oss_sp, &uoss->ss_sp) 719 || __put_user(oss_os, &uoss->ss_onstack)) 720 goto out; 721 } 722 723 error = 0; 724 out: 725 return error; 726 } 727 728 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 729 { 730 const char *sysinfo_table[] = { 731 utsname()->sysname, 732 utsname()->nodename, 733 utsname()->release, 734 utsname()->version, 735 utsname()->machine, 736 "alpha", /* instruction set architecture */ 737 "dummy", /* hardware serial number */ 738 "dummy", /* hardware manufacturer */ 739 "dummy", /* secure RPC domain */ 740 }; 741 unsigned long offset; 742 const char *res; 743 long len, err = -EINVAL; 744 745 offset = command-1; 746 if (offset >= ARRAY_SIZE(sysinfo_table)) { 747 /* Digital UNIX has a few unpublished interfaces here */ 748 printk("sysinfo(%d)", command); 749 goto out; 750 } 751 752 down_read(&uts_sem); 753 res = sysinfo_table[offset]; 754 len = strlen(res)+1; 755 if ((unsigned long)len > (unsigned long)count) 756 len = count; 757 if (copy_to_user(buf, res, len)) 758 err = -EFAULT; 759 else 760 err = 0; 761 up_read(&uts_sem); 762 out: 763 return err; 764 } 765 766 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 767 unsigned long, nbytes, int __user *, start, void __user *, arg) 768 { 769 unsigned long w; 770 struct percpu_struct *cpu; 771 772 switch (op) { 773 case GSI_IEEE_FP_CONTROL: 774 /* Return current software fp control & status bits. */ 775 /* Note that DU doesn't verify available space here. */ 776 777 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 778 w = swcr_update_status(w, rdfpcr()); 779 if (put_user(w, (unsigned long __user *) buffer)) 780 return -EFAULT; 781 return 0; 782 783 case GSI_IEEE_STATE_AT_SIGNAL: 784 /* 785 * Not sure anybody will ever use this weird stuff. These 786 * ops can be used (under OSF/1) to set the fpcr that should 787 * be used when a signal handler starts executing. 788 */ 789 break; 790 791 case GSI_UACPROC: 792 if (nbytes < sizeof(unsigned int)) 793 return -EINVAL; 794 w = current_thread_info()->status & UAC_BITMASK; 795 if (put_user(w, (unsigned int __user *)buffer)) 796 return -EFAULT; 797 return 1; 798 799 case GSI_PROC_TYPE: 800 if (nbytes < sizeof(unsigned long)) 801 return -EINVAL; 802 cpu = (struct percpu_struct*) 803 ((char*)hwrpb + hwrpb->processor_offset); 804 w = cpu->type; 805 if (put_user(w, (unsigned long __user*)buffer)) 806 return -EFAULT; 807 return 1; 808 809 case GSI_GET_HWRPB: 810 if (nbytes > sizeof(*hwrpb)) 811 return -EINVAL; 812 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 813 return -EFAULT; 814 return 1; 815 816 default: 817 break; 818 } 819 820 return -EOPNOTSUPP; 821 } 822 823 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 824 unsigned long, nbytes, int __user *, start, void __user *, arg) 825 { 826 switch (op) { 827 case SSI_IEEE_FP_CONTROL: { 828 unsigned long swcr, fpcr; 829 unsigned int *state; 830 831 /* 832 * Alpha Architecture Handbook 4.7.7.3: 833 * To be fully IEEE compiant, we must track the current IEEE 834 * exception state in software, because spurious bits can be 835 * set in the trap shadow of a software-complete insn. 836 */ 837 838 if (get_user(swcr, (unsigned long __user *)buffer)) 839 return -EFAULT; 840 state = ¤t_thread_info()->ieee_state; 841 842 /* Update softare trap enable bits. */ 843 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 844 845 /* Update the real fpcr. */ 846 fpcr = rdfpcr() & FPCR_DYN_MASK; 847 fpcr |= ieee_swcr_to_fpcr(swcr); 848 wrfpcr(fpcr); 849 850 return 0; 851 } 852 853 case SSI_IEEE_RAISE_EXCEPTION: { 854 unsigned long exc, swcr, fpcr, fex; 855 unsigned int *state; 856 857 if (get_user(exc, (unsigned long __user *)buffer)) 858 return -EFAULT; 859 state = ¤t_thread_info()->ieee_state; 860 exc &= IEEE_STATUS_MASK; 861 862 /* Update softare trap enable bits. */ 863 swcr = (*state & IEEE_SW_MASK) | exc; 864 *state |= exc; 865 866 /* Update the real fpcr. */ 867 fpcr = rdfpcr(); 868 fpcr |= ieee_swcr_to_fpcr(swcr); 869 wrfpcr(fpcr); 870 871 /* If any exceptions set by this call, and are unmasked, 872 send a signal. Old exceptions are not signaled. */ 873 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 874 if (fex) { 875 siginfo_t info; 876 int si_code = 0; 877 878 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 879 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 880 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 881 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 882 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 883 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 884 885 info.si_signo = SIGFPE; 886 info.si_errno = 0; 887 info.si_code = si_code; 888 info.si_addr = NULL; /* FIXME */ 889 send_sig_info(SIGFPE, &info, current); 890 } 891 return 0; 892 } 893 894 case SSI_IEEE_STATE_AT_SIGNAL: 895 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 896 /* 897 * Not sure anybody will ever use this weird stuff. These 898 * ops can be used (under OSF/1) to set the fpcr that should 899 * be used when a signal handler starts executing. 900 */ 901 break; 902 903 case SSI_NVPAIRS: { 904 unsigned __user *p = buffer; 905 unsigned i; 906 907 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 908 unsigned v, w, status; 909 910 if (get_user(v, p) || get_user(w, p + 1)) 911 return -EFAULT; 912 switch (v) { 913 case SSIN_UACPROC: 914 w &= UAC_BITMASK; 915 status = current_thread_info()->status; 916 status = (status & ~UAC_BITMASK) | w; 917 current_thread_info()->status = status; 918 break; 919 920 default: 921 return -EOPNOTSUPP; 922 } 923 } 924 return 0; 925 } 926 927 case SSI_LMF: 928 return 0; 929 930 default: 931 break; 932 } 933 934 return -EOPNOTSUPP; 935 } 936 937 /* Translations due to the fact that OSF's time_t is an int. Which 938 affects all sorts of things, like timeval and itimerval. */ 939 940 extern struct timezone sys_tz; 941 942 struct timeval32 943 { 944 int tv_sec, tv_usec; 945 }; 946 947 struct itimerval32 948 { 949 struct timeval32 it_interval; 950 struct timeval32 it_value; 951 }; 952 953 static inline long 954 get_tv32(struct timeval *o, struct timeval32 __user *i) 955 { 956 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 957 (__get_user(o->tv_sec, &i->tv_sec) | 958 __get_user(o->tv_usec, &i->tv_usec))); 959 } 960 961 static inline long 962 put_tv32(struct timeval32 __user *o, struct timeval *i) 963 { 964 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 965 (__put_user(i->tv_sec, &o->tv_sec) | 966 __put_user(i->tv_usec, &o->tv_usec))); 967 } 968 969 static inline long 970 get_it32(struct itimerval *o, struct itimerval32 __user *i) 971 { 972 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 973 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 974 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 975 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 976 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 977 } 978 979 static inline long 980 put_it32(struct itimerval32 __user *o, struct itimerval *i) 981 { 982 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 983 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 984 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 985 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 986 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 987 } 988 989 static inline void 990 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 991 { 992 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 993 value->tv_sec = jiffies / HZ; 994 } 995 996 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 997 struct timezone __user *, tz) 998 { 999 if (tv) { 1000 struct timeval ktv; 1001 do_gettimeofday(&ktv); 1002 if (put_tv32(tv, &ktv)) 1003 return -EFAULT; 1004 } 1005 if (tz) { 1006 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 1007 return -EFAULT; 1008 } 1009 return 0; 1010 } 1011 1012 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 1013 struct timezone __user *, tz) 1014 { 1015 struct timespec kts; 1016 struct timezone ktz; 1017 1018 if (tv) { 1019 if (get_tv32((struct timeval *)&kts, tv)) 1020 return -EFAULT; 1021 } 1022 if (tz) { 1023 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1024 return -EFAULT; 1025 } 1026 1027 kts.tv_nsec *= 1000; 1028 1029 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 1030 } 1031 1032 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 1033 { 1034 struct itimerval kit; 1035 int error; 1036 1037 error = do_getitimer(which, &kit); 1038 if (!error && put_it32(it, &kit)) 1039 error = -EFAULT; 1040 1041 return error; 1042 } 1043 1044 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 1045 struct itimerval32 __user *, out) 1046 { 1047 struct itimerval kin, kout; 1048 int error; 1049 1050 if (in) { 1051 if (get_it32(&kin, in)) 1052 return -EFAULT; 1053 } else 1054 memset(&kin, 0, sizeof(kin)); 1055 1056 error = do_setitimer(which, &kin, out ? &kout : NULL); 1057 if (error || !out) 1058 return error; 1059 1060 if (put_it32(out, &kout)) 1061 return -EFAULT; 1062 1063 return 0; 1064 1065 } 1066 1067 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1068 struct timeval32 __user *, tvs) 1069 { 1070 struct timespec tv[2]; 1071 1072 if (tvs) { 1073 struct timeval ktvs[2]; 1074 if (get_tv32(&ktvs[0], &tvs[0]) || 1075 get_tv32(&ktvs[1], &tvs[1])) 1076 return -EFAULT; 1077 1078 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 1079 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 1080 return -EINVAL; 1081 1082 tv[0].tv_sec = ktvs[0].tv_sec; 1083 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 1084 tv[1].tv_sec = ktvs[1].tv_sec; 1085 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 1086 } 1087 1088 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1089 } 1090 1091 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1092 fd_set __user *, exp, struct timeval32 __user *, tvp) 1093 { 1094 struct timespec end_time, *to = NULL; 1095 if (tvp) { 1096 time_t sec, usec; 1097 1098 to = &end_time; 1099 1100 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 1101 || __get_user(sec, &tvp->tv_sec) 1102 || __get_user(usec, &tvp->tv_usec)) { 1103 return -EFAULT; 1104 } 1105 1106 if (sec < 0 || usec < 0) 1107 return -EINVAL; 1108 1109 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 1110 return -EINVAL; 1111 1112 } 1113 1114 /* OSF does not copy back the remaining time. */ 1115 return core_sys_select(n, inp, outp, exp, to); 1116 } 1117 1118 struct rusage32 { 1119 struct timeval32 ru_utime; /* user time used */ 1120 struct timeval32 ru_stime; /* system time used */ 1121 long ru_maxrss; /* maximum resident set size */ 1122 long ru_ixrss; /* integral shared memory size */ 1123 long ru_idrss; /* integral unshared data size */ 1124 long ru_isrss; /* integral unshared stack size */ 1125 long ru_minflt; /* page reclaims */ 1126 long ru_majflt; /* page faults */ 1127 long ru_nswap; /* swaps */ 1128 long ru_inblock; /* block input operations */ 1129 long ru_oublock; /* block output operations */ 1130 long ru_msgsnd; /* messages sent */ 1131 long ru_msgrcv; /* messages received */ 1132 long ru_nsignals; /* signals received */ 1133 long ru_nvcsw; /* voluntary context switches */ 1134 long ru_nivcsw; /* involuntary " */ 1135 }; 1136 1137 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1138 { 1139 struct rusage32 r; 1140 cputime_t utime, stime; 1141 1142 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1143 return -EINVAL; 1144 1145 memset(&r, 0, sizeof(r)); 1146 switch (who) { 1147 case RUSAGE_SELF: 1148 task_cputime(current, &utime, &stime); 1149 jiffies_to_timeval32(utime, &r.ru_utime); 1150 jiffies_to_timeval32(stime, &r.ru_stime); 1151 r.ru_minflt = current->min_flt; 1152 r.ru_majflt = current->maj_flt; 1153 break; 1154 case RUSAGE_CHILDREN: 1155 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1156 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1157 r.ru_minflt = current->signal->cmin_flt; 1158 r.ru_majflt = current->signal->cmaj_flt; 1159 break; 1160 } 1161 1162 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1163 } 1164 1165 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1166 struct rusage32 __user *, ur) 1167 { 1168 struct rusage r; 1169 long ret, err; 1170 unsigned int status = 0; 1171 mm_segment_t old_fs; 1172 1173 if (!ur) 1174 return sys_wait4(pid, ustatus, options, NULL); 1175 1176 old_fs = get_fs(); 1177 1178 set_fs (KERNEL_DS); 1179 ret = sys_wait4(pid, (unsigned int __user *) &status, options, 1180 (struct rusage __user *) &r); 1181 set_fs (old_fs); 1182 1183 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1184 return -EFAULT; 1185 1186 err = 0; 1187 err |= put_user(status, ustatus); 1188 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1189 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1190 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1191 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1192 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1193 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1194 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1195 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1196 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1197 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1198 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1199 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1200 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1201 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1202 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1203 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1204 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1205 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1206 1207 return err ? err : ret; 1208 } 1209 1210 /* 1211 * I don't know what the parameters are: the first one 1212 * seems to be a timeval pointer, and I suspect the second 1213 * one is the time remaining.. Ho humm.. No documentation. 1214 */ 1215 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1216 struct timeval32 __user *, remain) 1217 { 1218 struct timeval tmp; 1219 unsigned long ticks; 1220 1221 if (get_tv32(&tmp, sleep)) 1222 goto fault; 1223 1224 ticks = timeval_to_jiffies(&tmp); 1225 1226 ticks = schedule_timeout_interruptible(ticks); 1227 1228 if (remain) { 1229 jiffies_to_timeval(ticks, &tmp); 1230 if (put_tv32(remain, &tmp)) 1231 goto fault; 1232 } 1233 1234 return 0; 1235 fault: 1236 return -EFAULT; 1237 } 1238 1239 1240 struct timex32 { 1241 unsigned int modes; /* mode selector */ 1242 long offset; /* time offset (usec) */ 1243 long freq; /* frequency offset (scaled ppm) */ 1244 long maxerror; /* maximum error (usec) */ 1245 long esterror; /* estimated error (usec) */ 1246 int status; /* clock command/status */ 1247 long constant; /* pll time constant */ 1248 long precision; /* clock precision (usec) (read only) */ 1249 long tolerance; /* clock frequency tolerance (ppm) 1250 * (read only) 1251 */ 1252 struct timeval32 time; /* (read only) */ 1253 long tick; /* (modified) usecs between clock ticks */ 1254 1255 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1256 long jitter; /* pps jitter (us) (ro) */ 1257 int shift; /* interval duration (s) (shift) (ro) */ 1258 long stabil; /* pps stability (scaled ppm) (ro) */ 1259 long jitcnt; /* jitter limit exceeded (ro) */ 1260 long calcnt; /* calibration intervals (ro) */ 1261 long errcnt; /* calibration errors (ro) */ 1262 long stbcnt; /* stability limit exceeded (ro) */ 1263 1264 int :32; int :32; int :32; int :32; 1265 int :32; int :32; int :32; int :32; 1266 int :32; int :32; int :32; int :32; 1267 }; 1268 1269 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1270 { 1271 struct timex txc; 1272 int ret; 1273 1274 /* copy relevant bits of struct timex. */ 1275 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1276 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1277 offsetof(struct timex32, time))) 1278 return -EFAULT; 1279 1280 ret = do_adjtimex(&txc); 1281 if (ret < 0) 1282 return ret; 1283 1284 /* copy back to timex32 */ 1285 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1286 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1287 offsetof(struct timex32, tick))) || 1288 (put_tv32(&txc_p->time, &txc.time))) 1289 return -EFAULT; 1290 1291 return ret; 1292 } 1293 1294 /* Get an address range which is currently unmapped. Similar to the 1295 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1296 1297 static unsigned long 1298 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1299 unsigned long limit) 1300 { 1301 struct vm_unmapped_area_info info; 1302 1303 info.flags = 0; 1304 info.length = len; 1305 info.low_limit = addr; 1306 info.high_limit = limit; 1307 info.align_mask = 0; 1308 info.align_offset = 0; 1309 return vm_unmapped_area(&info); 1310 } 1311 1312 unsigned long 1313 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1314 unsigned long len, unsigned long pgoff, 1315 unsigned long flags) 1316 { 1317 unsigned long limit; 1318 1319 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1320 if (current->personality & ADDR_LIMIT_32BIT) 1321 limit = 0x80000000; 1322 else 1323 limit = TASK_SIZE; 1324 1325 if (len > limit) 1326 return -ENOMEM; 1327 1328 if (flags & MAP_FIXED) 1329 return addr; 1330 1331 /* First, see if the given suggestion fits. 1332 1333 The OSF/1 loader (/sbin/loader) relies on us returning an 1334 address larger than the requested if one exists, which is 1335 a terribly broken way to program. 1336 1337 That said, I can see the use in being able to suggest not 1338 merely specific addresses, but regions of memory -- perhaps 1339 this feature should be incorporated into all ports? */ 1340 1341 if (addr) { 1342 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1343 if (addr != (unsigned long) -ENOMEM) 1344 return addr; 1345 } 1346 1347 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1348 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1349 len, limit); 1350 if (addr != (unsigned long) -ENOMEM) 1351 return addr; 1352 1353 /* Finally, try allocating in low memory. */ 1354 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1355 1356 return addr; 1357 } 1358 1359 #ifdef CONFIG_OSF4_COMPAT 1360 1361 /* Clear top 32 bits of iov_len in the user's buffer for 1362 compatibility with old versions of OSF/1 where iov_len 1363 was defined as int. */ 1364 static int 1365 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1366 { 1367 unsigned long i; 1368 1369 for (i = 0 ; i < count ; i++) { 1370 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1371 1372 if (put_user(0, iov_len_high)) 1373 return -EFAULT; 1374 } 1375 return 0; 1376 } 1377 1378 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1379 const struct iovec __user *, vector, unsigned long, count) 1380 { 1381 if (unlikely(personality(current->personality) == PER_OSF4)) 1382 if (osf_fix_iov_len(vector, count)) 1383 return -EFAULT; 1384 return sys_readv(fd, vector, count); 1385 } 1386 1387 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1388 const struct iovec __user *, vector, unsigned long, count) 1389 { 1390 if (unlikely(personality(current->personality) == PER_OSF4)) 1391 if (osf_fix_iov_len(vector, count)) 1392 return -EFAULT; 1393 return sys_writev(fd, vector, count); 1394 } 1395 1396 #endif 1397 1398 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1399 { 1400 int prio = sys_getpriority(which, who); 1401 if (prio >= 0) { 1402 /* Return value is the unbiased priority, i.e. 20 - prio. 1403 This does result in negative return values, so signal 1404 no error */ 1405 force_successful_syscall_return(); 1406 prio = 20 - prio; 1407 } 1408 return prio; 1409 } 1410 1411 SYSCALL_DEFINE0(getxuid) 1412 { 1413 current_pt_regs()->r20 = sys_geteuid(); 1414 return sys_getuid(); 1415 } 1416 1417 SYSCALL_DEFINE0(getxgid) 1418 { 1419 current_pt_regs()->r20 = sys_getegid(); 1420 return sys_getgid(); 1421 } 1422 1423 SYSCALL_DEFINE0(getxpid) 1424 { 1425 current_pt_regs()->r20 = sys_getppid(); 1426 return sys_getpid(); 1427 } 1428 1429 SYSCALL_DEFINE0(alpha_pipe) 1430 { 1431 int fd[2]; 1432 int res = do_pipe_flags(fd, 0); 1433 if (!res) { 1434 /* The return values are in $0 and $20. */ 1435 current_pt_regs()->r20 = fd[1]; 1436 res = fd[0]; 1437 } 1438 return res; 1439 } 1440 1441 SYSCALL_DEFINE1(sethae, unsigned long, val) 1442 { 1443 current_pt_regs()->hae = val; 1444 return 0; 1445 } 1446