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 fd arg = fdget(fd); 149 struct osf_dirent_callback buf; 150 151 if (!arg.file) 152 return -EBADF; 153 154 buf.dirent = dirent; 155 buf.basep = basep; 156 buf.count = count; 157 buf.error = 0; 158 159 error = vfs_readdir(arg.file, osf_filldir, &buf); 160 if (error >= 0) 161 error = buf.error; 162 if (count != buf.count) 163 error = count - buf.count; 164 165 fdput(arg); 166 return error; 167 } 168 169 #undef NAME_OFFSET 170 171 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 172 unsigned long, prot, unsigned long, flags, unsigned long, fd, 173 unsigned long, off) 174 { 175 unsigned long ret = -EINVAL; 176 177 #if 0 178 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 179 printk("%s: unimplemented OSF mmap flags %04lx\n", 180 current->comm, flags); 181 #endif 182 if ((off + PAGE_ALIGN(len)) < off) 183 goto out; 184 if (off & ~PAGE_MASK) 185 goto out; 186 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 187 out: 188 return ret; 189 } 190 191 struct osf_stat { 192 int st_dev; 193 int st_pad1; 194 unsigned st_mode; 195 unsigned short st_nlink; 196 short st_nlink_reserved; 197 unsigned st_uid; 198 unsigned st_gid; 199 int st_rdev; 200 int st_ldev; 201 long st_size; 202 int st_pad2; 203 int st_uatime; 204 int st_pad3; 205 int st_umtime; 206 int st_pad4; 207 int st_uctime; 208 int st_pad5; 209 int st_pad6; 210 unsigned st_flags; 211 unsigned st_gen; 212 long st_spare[4]; 213 unsigned st_ino; 214 int st_ino_reserved; 215 int st_atime; 216 int st_atime_reserved; 217 int st_mtime; 218 int st_mtime_reserved; 219 int st_ctime; 220 int st_ctime_reserved; 221 long st_blksize; 222 long st_blocks; 223 }; 224 225 /* 226 * The OSF/1 statfs structure is much larger, but this should 227 * match the beginning, at least. 228 */ 229 struct osf_statfs { 230 short f_type; 231 short f_flags; 232 int f_fsize; 233 int f_bsize; 234 int f_blocks; 235 int f_bfree; 236 int f_bavail; 237 int f_files; 238 int f_ffree; 239 __kernel_fsid_t f_fsid; 240 }; 241 242 struct osf_statfs64 { 243 short f_type; 244 short f_flags; 245 int f_pad1; 246 int f_pad2; 247 int f_pad3; 248 int f_pad4; 249 int f_pad5; 250 int f_pad6; 251 int f_pad7; 252 __kernel_fsid_t f_fsid; 253 u_short f_namemax; 254 short f_reserved1; 255 int f_spare[8]; 256 char f_pad8[90]; 257 char f_pad9[90]; 258 long mount_info[10]; 259 u_long f_flags2; 260 long f_spare2[14]; 261 long f_fsize; 262 long f_bsize; 263 long f_blocks; 264 long f_bfree; 265 long f_bavail; 266 long f_files; 267 long f_ffree; 268 }; 269 270 static int 271 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) 272 { 273 struct osf_stat tmp = { 0 }; 274 275 tmp.st_dev = lstat->dev; 276 tmp.st_mode = lstat->mode; 277 tmp.st_nlink = lstat->nlink; 278 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid); 279 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid); 280 tmp.st_rdev = lstat->rdev; 281 tmp.st_ldev = lstat->rdev; 282 tmp.st_size = lstat->size; 283 tmp.st_uatime = lstat->atime.tv_nsec / 1000; 284 tmp.st_umtime = lstat->mtime.tv_nsec / 1000; 285 tmp.st_uctime = lstat->ctime.tv_nsec / 1000; 286 tmp.st_ino = lstat->ino; 287 tmp.st_atime = lstat->atime.tv_sec; 288 tmp.st_mtime = lstat->mtime.tv_sec; 289 tmp.st_ctime = lstat->ctime.tv_sec; 290 tmp.st_blksize = lstat->blksize; 291 tmp.st_blocks = lstat->blocks; 292 293 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; 294 } 295 296 static int 297 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 298 unsigned long bufsiz) 299 { 300 struct osf_statfs tmp_stat; 301 302 tmp_stat.f_type = linux_stat->f_type; 303 tmp_stat.f_flags = 0; /* mount flags */ 304 tmp_stat.f_fsize = linux_stat->f_frsize; 305 tmp_stat.f_bsize = linux_stat->f_bsize; 306 tmp_stat.f_blocks = linux_stat->f_blocks; 307 tmp_stat.f_bfree = linux_stat->f_bfree; 308 tmp_stat.f_bavail = linux_stat->f_bavail; 309 tmp_stat.f_files = linux_stat->f_files; 310 tmp_stat.f_ffree = linux_stat->f_ffree; 311 tmp_stat.f_fsid = linux_stat->f_fsid; 312 if (bufsiz > sizeof(tmp_stat)) 313 bufsiz = sizeof(tmp_stat); 314 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 315 } 316 317 static int 318 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, 319 unsigned long bufsiz) 320 { 321 struct osf_statfs64 tmp_stat = { 0 }; 322 323 tmp_stat.f_type = linux_stat->f_type; 324 tmp_stat.f_fsize = linux_stat->f_frsize; 325 tmp_stat.f_bsize = linux_stat->f_bsize; 326 tmp_stat.f_blocks = linux_stat->f_blocks; 327 tmp_stat.f_bfree = linux_stat->f_bfree; 328 tmp_stat.f_bavail = linux_stat->f_bavail; 329 tmp_stat.f_files = linux_stat->f_files; 330 tmp_stat.f_ffree = linux_stat->f_ffree; 331 tmp_stat.f_fsid = linux_stat->f_fsid; 332 if (bufsiz > sizeof(tmp_stat)) 333 bufsiz = sizeof(tmp_stat); 334 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 335 } 336 337 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 338 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 339 { 340 struct kstatfs linux_stat; 341 int error = user_statfs(pathname, &linux_stat); 342 if (!error) 343 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 344 return error; 345 } 346 347 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) 348 { 349 struct kstat stat; 350 int error; 351 352 error = vfs_stat(name, &stat); 353 if (error) 354 return error; 355 356 return linux_to_osf_stat(&stat, buf); 357 } 358 359 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) 360 { 361 struct kstat stat; 362 int error; 363 364 error = vfs_lstat(name, &stat); 365 if (error) 366 return error; 367 368 return linux_to_osf_stat(&stat, buf); 369 } 370 371 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) 372 { 373 struct kstat stat; 374 int error; 375 376 error = vfs_fstat(fd, &stat); 377 if (error) 378 return error; 379 380 return linux_to_osf_stat(&stat, buf); 381 } 382 383 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 384 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 385 { 386 struct kstatfs linux_stat; 387 int error = fd_statfs(fd, &linux_stat); 388 if (!error) 389 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 390 return error; 391 } 392 393 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, 394 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 395 { 396 struct kstatfs linux_stat; 397 int error = user_statfs(pathname, &linux_stat); 398 if (!error) 399 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 400 return error; 401 } 402 403 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, 404 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 405 { 406 struct kstatfs linux_stat; 407 int error = fd_statfs(fd, &linux_stat); 408 if (!error) 409 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 410 return error; 411 } 412 413 /* 414 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 415 * 416 * Although to be frank, neither are the native Linux/i386 ones.. 417 */ 418 struct ufs_args { 419 char __user *devname; 420 int flags; 421 uid_t exroot; 422 }; 423 424 struct cdfs_args { 425 char __user *devname; 426 int flags; 427 uid_t exroot; 428 429 /* This has lots more here, which Linux handles with the option block 430 but I'm too lazy to do the translation into ASCII. */ 431 }; 432 433 struct procfs_args { 434 char __user *devname; 435 int flags; 436 uid_t exroot; 437 }; 438 439 /* 440 * We can't actually handle ufs yet, so we translate UFS mounts to 441 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 442 * layout is so braindead it's a major headache doing it. 443 * 444 * Just how long ago was it written? OTOH our UFS driver may be still 445 * unhappy with OSF UFS. [CHECKME] 446 */ 447 static int 448 osf_ufs_mount(const char *dirname, struct ufs_args __user *args, int flags) 449 { 450 int retval; 451 struct cdfs_args tmp; 452 struct filename *devname; 453 454 retval = -EFAULT; 455 if (copy_from_user(&tmp, args, sizeof(tmp))) 456 goto out; 457 devname = getname(tmp.devname); 458 retval = PTR_ERR(devname); 459 if (IS_ERR(devname)) 460 goto out; 461 retval = do_mount(devname->name, dirname, "ext2", flags, NULL); 462 putname(devname); 463 out: 464 return retval; 465 } 466 467 static int 468 osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags) 469 { 470 int retval; 471 struct cdfs_args tmp; 472 struct filename *devname; 473 474 retval = -EFAULT; 475 if (copy_from_user(&tmp, args, sizeof(tmp))) 476 goto out; 477 devname = getname(tmp.devname); 478 retval = PTR_ERR(devname); 479 if (IS_ERR(devname)) 480 goto out; 481 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); 482 putname(devname); 483 out: 484 return retval; 485 } 486 487 static int 488 osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags) 489 { 490 struct procfs_args tmp; 491 492 if (copy_from_user(&tmp, args, sizeof(tmp))) 493 return -EFAULT; 494 495 return do_mount("", dirname, "proc", flags, NULL); 496 } 497 498 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 499 int, flag, void __user *, data) 500 { 501 int retval; 502 struct filename *name; 503 504 name = getname(path); 505 retval = PTR_ERR(name); 506 if (IS_ERR(name)) 507 goto out; 508 switch (typenr) { 509 case 1: 510 retval = osf_ufs_mount(name->name, data, flag); 511 break; 512 case 6: 513 retval = osf_cdfs_mount(name->name, data, flag); 514 break; 515 case 9: 516 retval = osf_procfs_mount(name->name, data, flag); 517 break; 518 default: 519 retval = -EINVAL; 520 printk("osf_mount(%ld, %x)\n", typenr, flag); 521 } 522 putname(name); 523 out: 524 return retval; 525 } 526 527 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 528 { 529 int error; 530 531 down_read(&uts_sem); 532 error = -EFAULT; 533 if (copy_to_user(name + 0, utsname()->sysname, 32)) 534 goto out; 535 if (copy_to_user(name + 32, utsname()->nodename, 32)) 536 goto out; 537 if (copy_to_user(name + 64, utsname()->release, 32)) 538 goto out; 539 if (copy_to_user(name + 96, utsname()->version, 32)) 540 goto out; 541 if (copy_to_user(name + 128, utsname()->machine, 32)) 542 goto out; 543 544 error = 0; 545 out: 546 up_read(&uts_sem); 547 return error; 548 } 549 550 SYSCALL_DEFINE0(getpagesize) 551 { 552 return PAGE_SIZE; 553 } 554 555 SYSCALL_DEFINE0(getdtablesize) 556 { 557 return sysctl_nr_open; 558 } 559 560 /* 561 * For compatibility with OSF/1 only. Use utsname(2) instead. 562 */ 563 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 564 { 565 unsigned len; 566 int i; 567 568 if (!access_ok(VERIFY_WRITE, name, namelen)) 569 return -EFAULT; 570 571 len = namelen; 572 if (len > 32) 573 len = 32; 574 575 down_read(&uts_sem); 576 for (i = 0; i < len; ++i) { 577 __put_user(utsname()->domainname[i], name + i); 578 if (utsname()->domainname[i] == '\0') 579 break; 580 } 581 up_read(&uts_sem); 582 583 return 0; 584 } 585 586 /* 587 * The following stuff should move into a header file should it ever 588 * be labeled "officially supported." Right now, there is just enough 589 * support to avoid applications (such as tar) printing error 590 * messages. The attributes are not really implemented. 591 */ 592 593 /* 594 * Values for Property list entry flag 595 */ 596 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 597 by default */ 598 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 599 #define PLE_FLAG_ALL -1 /* All flag value */ 600 601 struct proplistname_args { 602 unsigned int pl_mask; 603 unsigned int pl_numnames; 604 char **pl_names; 605 }; 606 607 union pl_args { 608 struct setargs { 609 char __user *path; 610 long follow; 611 long nbytes; 612 char __user *buf; 613 } set; 614 struct fsetargs { 615 long fd; 616 long nbytes; 617 char __user *buf; 618 } fset; 619 struct getargs { 620 char __user *path; 621 long follow; 622 struct proplistname_args __user *name_args; 623 long nbytes; 624 char __user *buf; 625 int __user *min_buf_size; 626 } get; 627 struct fgetargs { 628 long fd; 629 struct proplistname_args __user *name_args; 630 long nbytes; 631 char __user *buf; 632 int __user *min_buf_size; 633 } fget; 634 struct delargs { 635 char __user *path; 636 long follow; 637 struct proplistname_args __user *name_args; 638 } del; 639 struct fdelargs { 640 long fd; 641 struct proplistname_args __user *name_args; 642 } fdel; 643 }; 644 645 enum pl_code { 646 PL_SET = 1, PL_FSET = 2, 647 PL_GET = 3, PL_FGET = 4, 648 PL_DEL = 5, PL_FDEL = 6 649 }; 650 651 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 652 union pl_args __user *, args) 653 { 654 long error; 655 int __user *min_buf_size_ptr; 656 657 switch (code) { 658 case PL_SET: 659 if (get_user(error, &args->set.nbytes)) 660 error = -EFAULT; 661 break; 662 case PL_FSET: 663 if (get_user(error, &args->fset.nbytes)) 664 error = -EFAULT; 665 break; 666 case PL_GET: 667 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 668 if (error) 669 break; 670 error = put_user(0, min_buf_size_ptr); 671 break; 672 case PL_FGET: 673 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 674 if (error) 675 break; 676 error = put_user(0, min_buf_size_ptr); 677 break; 678 case PL_DEL: 679 case PL_FDEL: 680 error = 0; 681 break; 682 default: 683 error = -EOPNOTSUPP; 684 break; 685 }; 686 return error; 687 } 688 689 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 690 struct sigstack __user *, uoss) 691 { 692 unsigned long usp = rdusp(); 693 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 694 unsigned long oss_os = on_sig_stack(usp); 695 int error; 696 697 if (uss) { 698 void __user *ss_sp; 699 700 error = -EFAULT; 701 if (get_user(ss_sp, &uss->ss_sp)) 702 goto out; 703 704 /* If the current stack was set with sigaltstack, don't 705 swap stacks while we are on it. */ 706 error = -EPERM; 707 if (current->sas_ss_sp && on_sig_stack(usp)) 708 goto out; 709 710 /* Since we don't know the extent of the stack, and we don't 711 track onstack-ness, but rather calculate it, we must 712 presume a size. Ho hum this interface is lossy. */ 713 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 714 current->sas_ss_size = SIGSTKSZ; 715 } 716 717 if (uoss) { 718 error = -EFAULT; 719 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 720 || __put_user(oss_sp, &uoss->ss_sp) 721 || __put_user(oss_os, &uoss->ss_onstack)) 722 goto out; 723 } 724 725 error = 0; 726 out: 727 return error; 728 } 729 730 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 731 { 732 const char *sysinfo_table[] = { 733 utsname()->sysname, 734 utsname()->nodename, 735 utsname()->release, 736 utsname()->version, 737 utsname()->machine, 738 "alpha", /* instruction set architecture */ 739 "dummy", /* hardware serial number */ 740 "dummy", /* hardware manufacturer */ 741 "dummy", /* secure RPC domain */ 742 }; 743 unsigned long offset; 744 const char *res; 745 long len, err = -EINVAL; 746 747 offset = command-1; 748 if (offset >= ARRAY_SIZE(sysinfo_table)) { 749 /* Digital UNIX has a few unpublished interfaces here */ 750 printk("sysinfo(%d)", command); 751 goto out; 752 } 753 754 down_read(&uts_sem); 755 res = sysinfo_table[offset]; 756 len = strlen(res)+1; 757 if ((unsigned long)len > (unsigned long)count) 758 len = count; 759 if (copy_to_user(buf, res, len)) 760 err = -EFAULT; 761 else 762 err = 0; 763 up_read(&uts_sem); 764 out: 765 return err; 766 } 767 768 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 769 unsigned long, nbytes, int __user *, start, void __user *, arg) 770 { 771 unsigned long w; 772 struct percpu_struct *cpu; 773 774 switch (op) { 775 case GSI_IEEE_FP_CONTROL: 776 /* Return current software fp control & status bits. */ 777 /* Note that DU doesn't verify available space here. */ 778 779 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 780 w = swcr_update_status(w, rdfpcr()); 781 if (put_user(w, (unsigned long __user *) buffer)) 782 return -EFAULT; 783 return 0; 784 785 case GSI_IEEE_STATE_AT_SIGNAL: 786 /* 787 * Not sure anybody will ever use this weird stuff. These 788 * ops can be used (under OSF/1) to set the fpcr that should 789 * be used when a signal handler starts executing. 790 */ 791 break; 792 793 case GSI_UACPROC: 794 if (nbytes < sizeof(unsigned int)) 795 return -EINVAL; 796 w = current_thread_info()->status & UAC_BITMASK; 797 if (put_user(w, (unsigned int __user *)buffer)) 798 return -EFAULT; 799 return 1; 800 801 case GSI_PROC_TYPE: 802 if (nbytes < sizeof(unsigned long)) 803 return -EINVAL; 804 cpu = (struct percpu_struct*) 805 ((char*)hwrpb + hwrpb->processor_offset); 806 w = cpu->type; 807 if (put_user(w, (unsigned long __user*)buffer)) 808 return -EFAULT; 809 return 1; 810 811 case GSI_GET_HWRPB: 812 if (nbytes > sizeof(*hwrpb)) 813 return -EINVAL; 814 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 815 return -EFAULT; 816 return 1; 817 818 default: 819 break; 820 } 821 822 return -EOPNOTSUPP; 823 } 824 825 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 826 unsigned long, nbytes, int __user *, start, void __user *, arg) 827 { 828 switch (op) { 829 case SSI_IEEE_FP_CONTROL: { 830 unsigned long swcr, fpcr; 831 unsigned int *state; 832 833 /* 834 * Alpha Architecture Handbook 4.7.7.3: 835 * To be fully IEEE compiant, we must track the current IEEE 836 * exception state in software, because spurious bits can be 837 * set in the trap shadow of a software-complete insn. 838 */ 839 840 if (get_user(swcr, (unsigned long __user *)buffer)) 841 return -EFAULT; 842 state = ¤t_thread_info()->ieee_state; 843 844 /* Update softare trap enable bits. */ 845 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 846 847 /* Update the real fpcr. */ 848 fpcr = rdfpcr() & FPCR_DYN_MASK; 849 fpcr |= ieee_swcr_to_fpcr(swcr); 850 wrfpcr(fpcr); 851 852 return 0; 853 } 854 855 case SSI_IEEE_RAISE_EXCEPTION: { 856 unsigned long exc, swcr, fpcr, fex; 857 unsigned int *state; 858 859 if (get_user(exc, (unsigned long __user *)buffer)) 860 return -EFAULT; 861 state = ¤t_thread_info()->ieee_state; 862 exc &= IEEE_STATUS_MASK; 863 864 /* Update softare trap enable bits. */ 865 swcr = (*state & IEEE_SW_MASK) | exc; 866 *state |= exc; 867 868 /* Update the real fpcr. */ 869 fpcr = rdfpcr(); 870 fpcr |= ieee_swcr_to_fpcr(swcr); 871 wrfpcr(fpcr); 872 873 /* If any exceptions set by this call, and are unmasked, 874 send a signal. Old exceptions are not signaled. */ 875 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 876 if (fex) { 877 siginfo_t info; 878 int si_code = 0; 879 880 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 881 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 882 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 883 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 884 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 885 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 886 887 info.si_signo = SIGFPE; 888 info.si_errno = 0; 889 info.si_code = si_code; 890 info.si_addr = NULL; /* FIXME */ 891 send_sig_info(SIGFPE, &info, current); 892 } 893 return 0; 894 } 895 896 case SSI_IEEE_STATE_AT_SIGNAL: 897 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 898 /* 899 * Not sure anybody will ever use this weird stuff. These 900 * ops can be used (under OSF/1) to set the fpcr that should 901 * be used when a signal handler starts executing. 902 */ 903 break; 904 905 case SSI_NVPAIRS: { 906 unsigned __user *p = buffer; 907 unsigned i; 908 909 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 910 unsigned v, w, status; 911 912 if (get_user(v, p) || get_user(w, p + 1)) 913 return -EFAULT; 914 switch (v) { 915 case SSIN_UACPROC: 916 w &= UAC_BITMASK; 917 status = current_thread_info()->status; 918 status = (status & ~UAC_BITMASK) | w; 919 current_thread_info()->status = status; 920 break; 921 922 default: 923 return -EOPNOTSUPP; 924 } 925 } 926 return 0; 927 } 928 929 case SSI_LMF: 930 return 0; 931 932 default: 933 break; 934 } 935 936 return -EOPNOTSUPP; 937 } 938 939 /* Translations due to the fact that OSF's time_t is an int. Which 940 affects all sorts of things, like timeval and itimerval. */ 941 942 extern struct timezone sys_tz; 943 944 struct timeval32 945 { 946 int tv_sec, tv_usec; 947 }; 948 949 struct itimerval32 950 { 951 struct timeval32 it_interval; 952 struct timeval32 it_value; 953 }; 954 955 static inline long 956 get_tv32(struct timeval *o, struct timeval32 __user *i) 957 { 958 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 959 (__get_user(o->tv_sec, &i->tv_sec) | 960 __get_user(o->tv_usec, &i->tv_usec))); 961 } 962 963 static inline long 964 put_tv32(struct timeval32 __user *o, struct timeval *i) 965 { 966 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 967 (__put_user(i->tv_sec, &o->tv_sec) | 968 __put_user(i->tv_usec, &o->tv_usec))); 969 } 970 971 static inline long 972 get_it32(struct itimerval *o, struct itimerval32 __user *i) 973 { 974 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 975 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 976 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 977 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 978 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 979 } 980 981 static inline long 982 put_it32(struct itimerval32 __user *o, struct itimerval *i) 983 { 984 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 985 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 986 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 987 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 988 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 989 } 990 991 static inline void 992 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 993 { 994 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 995 value->tv_sec = jiffies / HZ; 996 } 997 998 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 999 struct timezone __user *, tz) 1000 { 1001 if (tv) { 1002 struct timeval ktv; 1003 do_gettimeofday(&ktv); 1004 if (put_tv32(tv, &ktv)) 1005 return -EFAULT; 1006 } 1007 if (tz) { 1008 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 1009 return -EFAULT; 1010 } 1011 return 0; 1012 } 1013 1014 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 1015 struct timezone __user *, tz) 1016 { 1017 struct timespec kts; 1018 struct timezone ktz; 1019 1020 if (tv) { 1021 if (get_tv32((struct timeval *)&kts, tv)) 1022 return -EFAULT; 1023 } 1024 if (tz) { 1025 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1026 return -EFAULT; 1027 } 1028 1029 kts.tv_nsec *= 1000; 1030 1031 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 1032 } 1033 1034 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 1035 { 1036 struct itimerval kit; 1037 int error; 1038 1039 error = do_getitimer(which, &kit); 1040 if (!error && put_it32(it, &kit)) 1041 error = -EFAULT; 1042 1043 return error; 1044 } 1045 1046 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 1047 struct itimerval32 __user *, out) 1048 { 1049 struct itimerval kin, kout; 1050 int error; 1051 1052 if (in) { 1053 if (get_it32(&kin, in)) 1054 return -EFAULT; 1055 } else 1056 memset(&kin, 0, sizeof(kin)); 1057 1058 error = do_setitimer(which, &kin, out ? &kout : NULL); 1059 if (error || !out) 1060 return error; 1061 1062 if (put_it32(out, &kout)) 1063 return -EFAULT; 1064 1065 return 0; 1066 1067 } 1068 1069 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1070 struct timeval32 __user *, tvs) 1071 { 1072 struct timespec tv[2]; 1073 1074 if (tvs) { 1075 struct timeval ktvs[2]; 1076 if (get_tv32(&ktvs[0], &tvs[0]) || 1077 get_tv32(&ktvs[1], &tvs[1])) 1078 return -EFAULT; 1079 1080 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 1081 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 1082 return -EINVAL; 1083 1084 tv[0].tv_sec = ktvs[0].tv_sec; 1085 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 1086 tv[1].tv_sec = ktvs[1].tv_sec; 1087 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 1088 } 1089 1090 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1091 } 1092 1093 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1094 fd_set __user *, exp, struct timeval32 __user *, tvp) 1095 { 1096 struct timespec end_time, *to = NULL; 1097 if (tvp) { 1098 time_t sec, usec; 1099 1100 to = &end_time; 1101 1102 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 1103 || __get_user(sec, &tvp->tv_sec) 1104 || __get_user(usec, &tvp->tv_usec)) { 1105 return -EFAULT; 1106 } 1107 1108 if (sec < 0 || usec < 0) 1109 return -EINVAL; 1110 1111 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 1112 return -EINVAL; 1113 1114 } 1115 1116 /* OSF does not copy back the remaining time. */ 1117 return core_sys_select(n, inp, outp, exp, to); 1118 } 1119 1120 struct rusage32 { 1121 struct timeval32 ru_utime; /* user time used */ 1122 struct timeval32 ru_stime; /* system time used */ 1123 long ru_maxrss; /* maximum resident set size */ 1124 long ru_ixrss; /* integral shared memory size */ 1125 long ru_idrss; /* integral unshared data size */ 1126 long ru_isrss; /* integral unshared stack size */ 1127 long ru_minflt; /* page reclaims */ 1128 long ru_majflt; /* page faults */ 1129 long ru_nswap; /* swaps */ 1130 long ru_inblock; /* block input operations */ 1131 long ru_oublock; /* block output operations */ 1132 long ru_msgsnd; /* messages sent */ 1133 long ru_msgrcv; /* messages received */ 1134 long ru_nsignals; /* signals received */ 1135 long ru_nvcsw; /* voluntary context switches */ 1136 long ru_nivcsw; /* involuntary " */ 1137 }; 1138 1139 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1140 { 1141 struct rusage32 r; 1142 cputime_t utime, stime; 1143 1144 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1145 return -EINVAL; 1146 1147 memset(&r, 0, sizeof(r)); 1148 switch (who) { 1149 case RUSAGE_SELF: 1150 task_cputime(current, &utime, &stime); 1151 jiffies_to_timeval32(utime, &r.ru_utime); 1152 jiffies_to_timeval32(stime, &r.ru_stime); 1153 r.ru_minflt = current->min_flt; 1154 r.ru_majflt = current->maj_flt; 1155 break; 1156 case RUSAGE_CHILDREN: 1157 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1158 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1159 r.ru_minflt = current->signal->cmin_flt; 1160 r.ru_majflt = current->signal->cmaj_flt; 1161 break; 1162 } 1163 1164 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1165 } 1166 1167 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1168 struct rusage32 __user *, ur) 1169 { 1170 struct rusage r; 1171 long ret, err; 1172 unsigned int status = 0; 1173 mm_segment_t old_fs; 1174 1175 if (!ur) 1176 return sys_wait4(pid, ustatus, options, NULL); 1177 1178 old_fs = get_fs(); 1179 1180 set_fs (KERNEL_DS); 1181 ret = sys_wait4(pid, (unsigned int __user *) &status, options, 1182 (struct rusage __user *) &r); 1183 set_fs (old_fs); 1184 1185 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1186 return -EFAULT; 1187 1188 err = 0; 1189 err |= put_user(status, ustatus); 1190 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1191 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1192 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1193 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1194 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1195 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1196 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1197 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1198 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1199 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1200 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1201 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1202 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1203 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1204 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1205 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1206 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1207 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1208 1209 return err ? err : ret; 1210 } 1211 1212 /* 1213 * I don't know what the parameters are: the first one 1214 * seems to be a timeval pointer, and I suspect the second 1215 * one is the time remaining.. Ho humm.. No documentation. 1216 */ 1217 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1218 struct timeval32 __user *, remain) 1219 { 1220 struct timeval tmp; 1221 unsigned long ticks; 1222 1223 if (get_tv32(&tmp, sleep)) 1224 goto fault; 1225 1226 ticks = timeval_to_jiffies(&tmp); 1227 1228 ticks = schedule_timeout_interruptible(ticks); 1229 1230 if (remain) { 1231 jiffies_to_timeval(ticks, &tmp); 1232 if (put_tv32(remain, &tmp)) 1233 goto fault; 1234 } 1235 1236 return 0; 1237 fault: 1238 return -EFAULT; 1239 } 1240 1241 1242 struct timex32 { 1243 unsigned int modes; /* mode selector */ 1244 long offset; /* time offset (usec) */ 1245 long freq; /* frequency offset (scaled ppm) */ 1246 long maxerror; /* maximum error (usec) */ 1247 long esterror; /* estimated error (usec) */ 1248 int status; /* clock command/status */ 1249 long constant; /* pll time constant */ 1250 long precision; /* clock precision (usec) (read only) */ 1251 long tolerance; /* clock frequency tolerance (ppm) 1252 * (read only) 1253 */ 1254 struct timeval32 time; /* (read only) */ 1255 long tick; /* (modified) usecs between clock ticks */ 1256 1257 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1258 long jitter; /* pps jitter (us) (ro) */ 1259 int shift; /* interval duration (s) (shift) (ro) */ 1260 long stabil; /* pps stability (scaled ppm) (ro) */ 1261 long jitcnt; /* jitter limit exceeded (ro) */ 1262 long calcnt; /* calibration intervals (ro) */ 1263 long errcnt; /* calibration errors (ro) */ 1264 long stbcnt; /* stability limit exceeded (ro) */ 1265 1266 int :32; int :32; int :32; int :32; 1267 int :32; int :32; int :32; int :32; 1268 int :32; int :32; int :32; int :32; 1269 }; 1270 1271 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1272 { 1273 struct timex txc; 1274 int ret; 1275 1276 /* copy relevant bits of struct timex. */ 1277 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1278 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1279 offsetof(struct timex32, time))) 1280 return -EFAULT; 1281 1282 ret = do_adjtimex(&txc); 1283 if (ret < 0) 1284 return ret; 1285 1286 /* copy back to timex32 */ 1287 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1288 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1289 offsetof(struct timex32, tick))) || 1290 (put_tv32(&txc_p->time, &txc.time))) 1291 return -EFAULT; 1292 1293 return ret; 1294 } 1295 1296 /* Get an address range which is currently unmapped. Similar to the 1297 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1298 1299 static unsigned long 1300 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1301 unsigned long limit) 1302 { 1303 struct vm_unmapped_area_info info; 1304 1305 info.flags = 0; 1306 info.length = len; 1307 info.low_limit = addr; 1308 info.high_limit = limit; 1309 info.align_mask = 0; 1310 info.align_offset = 0; 1311 return vm_unmapped_area(&info); 1312 } 1313 1314 unsigned long 1315 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1316 unsigned long len, unsigned long pgoff, 1317 unsigned long flags) 1318 { 1319 unsigned long limit; 1320 1321 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1322 if (current->personality & ADDR_LIMIT_32BIT) 1323 limit = 0x80000000; 1324 else 1325 limit = TASK_SIZE; 1326 1327 if (len > limit) 1328 return -ENOMEM; 1329 1330 if (flags & MAP_FIXED) 1331 return addr; 1332 1333 /* First, see if the given suggestion fits. 1334 1335 The OSF/1 loader (/sbin/loader) relies on us returning an 1336 address larger than the requested if one exists, which is 1337 a terribly broken way to program. 1338 1339 That said, I can see the use in being able to suggest not 1340 merely specific addresses, but regions of memory -- perhaps 1341 this feature should be incorporated into all ports? */ 1342 1343 if (addr) { 1344 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1345 if (addr != (unsigned long) -ENOMEM) 1346 return addr; 1347 } 1348 1349 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1350 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1351 len, limit); 1352 if (addr != (unsigned long) -ENOMEM) 1353 return addr; 1354 1355 /* Finally, try allocating in low memory. */ 1356 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1357 1358 return addr; 1359 } 1360 1361 #ifdef CONFIG_OSF4_COMPAT 1362 1363 /* Clear top 32 bits of iov_len in the user's buffer for 1364 compatibility with old versions of OSF/1 where iov_len 1365 was defined as int. */ 1366 static int 1367 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1368 { 1369 unsigned long i; 1370 1371 for (i = 0 ; i < count ; i++) { 1372 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1373 1374 if (put_user(0, iov_len_high)) 1375 return -EFAULT; 1376 } 1377 return 0; 1378 } 1379 1380 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1381 const struct iovec __user *, vector, unsigned long, count) 1382 { 1383 if (unlikely(personality(current->personality) == PER_OSF4)) 1384 if (osf_fix_iov_len(vector, count)) 1385 return -EFAULT; 1386 return sys_readv(fd, vector, count); 1387 } 1388 1389 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1390 const struct iovec __user *, vector, unsigned long, count) 1391 { 1392 if (unlikely(personality(current->personality) == PER_OSF4)) 1393 if (osf_fix_iov_len(vector, count)) 1394 return -EFAULT; 1395 return sys_writev(fd, vector, count); 1396 } 1397 1398 #endif 1399 1400 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1401 { 1402 int prio = sys_getpriority(which, who); 1403 if (prio >= 0) { 1404 /* Return value is the unbiased priority, i.e. 20 - prio. 1405 This does result in negative return values, so signal 1406 no error */ 1407 force_successful_syscall_return(); 1408 prio = 20 - prio; 1409 } 1410 return prio; 1411 } 1412 1413 SYSCALL_DEFINE0(getxuid) 1414 { 1415 current_pt_regs()->r20 = sys_geteuid(); 1416 return sys_getuid(); 1417 } 1418 1419 SYSCALL_DEFINE0(getxgid) 1420 { 1421 current_pt_regs()->r20 = sys_getegid(); 1422 return sys_getgid(); 1423 } 1424 1425 SYSCALL_DEFINE0(getxpid) 1426 { 1427 current_pt_regs()->r20 = sys_getppid(); 1428 return sys_getpid(); 1429 } 1430 1431 SYSCALL_DEFINE0(alpha_pipe) 1432 { 1433 int fd[2]; 1434 int res = do_pipe_flags(fd, 0); 1435 if (!res) { 1436 /* The return values are in $0 and $20. */ 1437 current_pt_regs()->r20 = fd[1]; 1438 res = fd[0]; 1439 } 1440 return res; 1441 } 1442 1443 SYSCALL_DEFINE1(sethae, unsigned long, val) 1444 { 1445 current_pt_regs()->hae = val; 1446 return 0; 1447 } 1448