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 *dirname, struct ufs_args __user *args, int flags) 450 { 451 int retval; 452 struct cdfs_args tmp; 453 struct filename *devname; 454 455 retval = -EFAULT; 456 if (copy_from_user(&tmp, args, sizeof(tmp))) 457 goto out; 458 devname = getname(tmp.devname); 459 retval = PTR_ERR(devname); 460 if (IS_ERR(devname)) 461 goto out; 462 retval = do_mount(devname->name, dirname, "ext2", flags, NULL); 463 putname(devname); 464 out: 465 return retval; 466 } 467 468 static int 469 osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags) 470 { 471 int retval; 472 struct cdfs_args tmp; 473 struct filename *devname; 474 475 retval = -EFAULT; 476 if (copy_from_user(&tmp, args, sizeof(tmp))) 477 goto out; 478 devname = getname(tmp.devname); 479 retval = PTR_ERR(devname); 480 if (IS_ERR(devname)) 481 goto out; 482 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); 483 putname(devname); 484 out: 485 return retval; 486 } 487 488 static int 489 osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags) 490 { 491 struct procfs_args tmp; 492 493 if (copy_from_user(&tmp, args, sizeof(tmp))) 494 return -EFAULT; 495 496 return do_mount("", dirname, "proc", flags, NULL); 497 } 498 499 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 500 int, flag, void __user *, data) 501 { 502 int retval; 503 struct filename *name; 504 505 name = getname(path); 506 retval = PTR_ERR(name); 507 if (IS_ERR(name)) 508 goto out; 509 switch (typenr) { 510 case 1: 511 retval = osf_ufs_mount(name->name, data, flag); 512 break; 513 case 6: 514 retval = osf_cdfs_mount(name->name, data, flag); 515 break; 516 case 9: 517 retval = osf_procfs_mount(name->name, data, flag); 518 break; 519 default: 520 retval = -EINVAL; 521 printk("osf_mount(%ld, %x)\n", typenr, flag); 522 } 523 putname(name); 524 out: 525 return retval; 526 } 527 528 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 529 { 530 int error; 531 532 down_read(&uts_sem); 533 error = -EFAULT; 534 if (copy_to_user(name + 0, utsname()->sysname, 32)) 535 goto out; 536 if (copy_to_user(name + 32, utsname()->nodename, 32)) 537 goto out; 538 if (copy_to_user(name + 64, utsname()->release, 32)) 539 goto out; 540 if (copy_to_user(name + 96, utsname()->version, 32)) 541 goto out; 542 if (copy_to_user(name + 128, utsname()->machine, 32)) 543 goto out; 544 545 error = 0; 546 out: 547 up_read(&uts_sem); 548 return error; 549 } 550 551 SYSCALL_DEFINE0(getpagesize) 552 { 553 return PAGE_SIZE; 554 } 555 556 SYSCALL_DEFINE0(getdtablesize) 557 { 558 return sysctl_nr_open; 559 } 560 561 /* 562 * For compatibility with OSF/1 only. Use utsname(2) instead. 563 */ 564 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 565 { 566 unsigned len; 567 int i; 568 569 if (!access_ok(VERIFY_WRITE, name, namelen)) 570 return -EFAULT; 571 572 len = namelen; 573 if (len > 32) 574 len = 32; 575 576 down_read(&uts_sem); 577 for (i = 0; i < len; ++i) { 578 __put_user(utsname()->domainname[i], name + i); 579 if (utsname()->domainname[i] == '\0') 580 break; 581 } 582 up_read(&uts_sem); 583 584 return 0; 585 } 586 587 /* 588 * The following stuff should move into a header file should it ever 589 * be labeled "officially supported." Right now, there is just enough 590 * support to avoid applications (such as tar) printing error 591 * messages. The attributes are not really implemented. 592 */ 593 594 /* 595 * Values for Property list entry flag 596 */ 597 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 598 by default */ 599 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 600 #define PLE_FLAG_ALL -1 /* All flag value */ 601 602 struct proplistname_args { 603 unsigned int pl_mask; 604 unsigned int pl_numnames; 605 char **pl_names; 606 }; 607 608 union pl_args { 609 struct setargs { 610 char __user *path; 611 long follow; 612 long nbytes; 613 char __user *buf; 614 } set; 615 struct fsetargs { 616 long fd; 617 long nbytes; 618 char __user *buf; 619 } fset; 620 struct getargs { 621 char __user *path; 622 long follow; 623 struct proplistname_args __user *name_args; 624 long nbytes; 625 char __user *buf; 626 int __user *min_buf_size; 627 } get; 628 struct fgetargs { 629 long fd; 630 struct proplistname_args __user *name_args; 631 long nbytes; 632 char __user *buf; 633 int __user *min_buf_size; 634 } fget; 635 struct delargs { 636 char __user *path; 637 long follow; 638 struct proplistname_args __user *name_args; 639 } del; 640 struct fdelargs { 641 long fd; 642 struct proplistname_args __user *name_args; 643 } fdel; 644 }; 645 646 enum pl_code { 647 PL_SET = 1, PL_FSET = 2, 648 PL_GET = 3, PL_FGET = 4, 649 PL_DEL = 5, PL_FDEL = 6 650 }; 651 652 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 653 union pl_args __user *, args) 654 { 655 long error; 656 int __user *min_buf_size_ptr; 657 658 switch (code) { 659 case PL_SET: 660 if (get_user(error, &args->set.nbytes)) 661 error = -EFAULT; 662 break; 663 case PL_FSET: 664 if (get_user(error, &args->fset.nbytes)) 665 error = -EFAULT; 666 break; 667 case PL_GET: 668 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 669 if (error) 670 break; 671 error = put_user(0, min_buf_size_ptr); 672 break; 673 case PL_FGET: 674 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 675 if (error) 676 break; 677 error = put_user(0, min_buf_size_ptr); 678 break; 679 case PL_DEL: 680 case PL_FDEL: 681 error = 0; 682 break; 683 default: 684 error = -EOPNOTSUPP; 685 break; 686 }; 687 return error; 688 } 689 690 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 691 struct sigstack __user *, uoss) 692 { 693 unsigned long usp = rdusp(); 694 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 695 unsigned long oss_os = on_sig_stack(usp); 696 int error; 697 698 if (uss) { 699 void __user *ss_sp; 700 701 error = -EFAULT; 702 if (get_user(ss_sp, &uss->ss_sp)) 703 goto out; 704 705 /* If the current stack was set with sigaltstack, don't 706 swap stacks while we are on it. */ 707 error = -EPERM; 708 if (current->sas_ss_sp && on_sig_stack(usp)) 709 goto out; 710 711 /* Since we don't know the extent of the stack, and we don't 712 track onstack-ness, but rather calculate it, we must 713 presume a size. Ho hum this interface is lossy. */ 714 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 715 current->sas_ss_size = SIGSTKSZ; 716 } 717 718 if (uoss) { 719 error = -EFAULT; 720 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 721 || __put_user(oss_sp, &uoss->ss_sp) 722 || __put_user(oss_os, &uoss->ss_onstack)) 723 goto out; 724 } 725 726 error = 0; 727 out: 728 return error; 729 } 730 731 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 732 { 733 const char *sysinfo_table[] = { 734 utsname()->sysname, 735 utsname()->nodename, 736 utsname()->release, 737 utsname()->version, 738 utsname()->machine, 739 "alpha", /* instruction set architecture */ 740 "dummy", /* hardware serial number */ 741 "dummy", /* hardware manufacturer */ 742 "dummy", /* secure RPC domain */ 743 }; 744 unsigned long offset; 745 const char *res; 746 long len, err = -EINVAL; 747 748 offset = command-1; 749 if (offset >= ARRAY_SIZE(sysinfo_table)) { 750 /* Digital UNIX has a few unpublished interfaces here */ 751 printk("sysinfo(%d)", command); 752 goto out; 753 } 754 755 down_read(&uts_sem); 756 res = sysinfo_table[offset]; 757 len = strlen(res)+1; 758 if ((unsigned long)len > (unsigned long)count) 759 len = count; 760 if (copy_to_user(buf, res, len)) 761 err = -EFAULT; 762 else 763 err = 0; 764 up_read(&uts_sem); 765 out: 766 return err; 767 } 768 769 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 770 unsigned long, nbytes, int __user *, start, void __user *, arg) 771 { 772 unsigned long w; 773 struct percpu_struct *cpu; 774 775 switch (op) { 776 case GSI_IEEE_FP_CONTROL: 777 /* Return current software fp control & status bits. */ 778 /* Note that DU doesn't verify available space here. */ 779 780 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 781 w = swcr_update_status(w, rdfpcr()); 782 if (put_user(w, (unsigned long __user *) buffer)) 783 return -EFAULT; 784 return 0; 785 786 case GSI_IEEE_STATE_AT_SIGNAL: 787 /* 788 * Not sure anybody will ever use this weird stuff. These 789 * ops can be used (under OSF/1) to set the fpcr that should 790 * be used when a signal handler starts executing. 791 */ 792 break; 793 794 case GSI_UACPROC: 795 if (nbytes < sizeof(unsigned int)) 796 return -EINVAL; 797 w = current_thread_info()->status & UAC_BITMASK; 798 if (put_user(w, (unsigned int __user *)buffer)) 799 return -EFAULT; 800 return 1; 801 802 case GSI_PROC_TYPE: 803 if (nbytes < sizeof(unsigned long)) 804 return -EINVAL; 805 cpu = (struct percpu_struct*) 806 ((char*)hwrpb + hwrpb->processor_offset); 807 w = cpu->type; 808 if (put_user(w, (unsigned long __user*)buffer)) 809 return -EFAULT; 810 return 1; 811 812 case GSI_GET_HWRPB: 813 if (nbytes > sizeof(*hwrpb)) 814 return -EINVAL; 815 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 816 return -EFAULT; 817 return 1; 818 819 default: 820 break; 821 } 822 823 return -EOPNOTSUPP; 824 } 825 826 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 827 unsigned long, nbytes, int __user *, start, void __user *, arg) 828 { 829 switch (op) { 830 case SSI_IEEE_FP_CONTROL: { 831 unsigned long swcr, fpcr; 832 unsigned int *state; 833 834 /* 835 * Alpha Architecture Handbook 4.7.7.3: 836 * To be fully IEEE compiant, we must track the current IEEE 837 * exception state in software, because spurious bits can be 838 * set in the trap shadow of a software-complete insn. 839 */ 840 841 if (get_user(swcr, (unsigned long __user *)buffer)) 842 return -EFAULT; 843 state = ¤t_thread_info()->ieee_state; 844 845 /* Update softare trap enable bits. */ 846 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 847 848 /* Update the real fpcr. */ 849 fpcr = rdfpcr() & FPCR_DYN_MASK; 850 fpcr |= ieee_swcr_to_fpcr(swcr); 851 wrfpcr(fpcr); 852 853 return 0; 854 } 855 856 case SSI_IEEE_RAISE_EXCEPTION: { 857 unsigned long exc, swcr, fpcr, fex; 858 unsigned int *state; 859 860 if (get_user(exc, (unsigned long __user *)buffer)) 861 return -EFAULT; 862 state = ¤t_thread_info()->ieee_state; 863 exc &= IEEE_STATUS_MASK; 864 865 /* Update softare trap enable bits. */ 866 swcr = (*state & IEEE_SW_MASK) | exc; 867 *state |= exc; 868 869 /* Update the real fpcr. */ 870 fpcr = rdfpcr(); 871 fpcr |= ieee_swcr_to_fpcr(swcr); 872 wrfpcr(fpcr); 873 874 /* If any exceptions set by this call, and are unmasked, 875 send a signal. Old exceptions are not signaled. */ 876 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 877 if (fex) { 878 siginfo_t info; 879 int si_code = 0; 880 881 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 882 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 883 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 884 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 885 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 886 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 887 888 info.si_signo = SIGFPE; 889 info.si_errno = 0; 890 info.si_code = si_code; 891 info.si_addr = NULL; /* FIXME */ 892 send_sig_info(SIGFPE, &info, current); 893 } 894 return 0; 895 } 896 897 case SSI_IEEE_STATE_AT_SIGNAL: 898 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 899 /* 900 * Not sure anybody will ever use this weird stuff. These 901 * ops can be used (under OSF/1) to set the fpcr that should 902 * be used when a signal handler starts executing. 903 */ 904 break; 905 906 case SSI_NVPAIRS: { 907 unsigned __user *p = buffer; 908 unsigned i; 909 910 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 911 unsigned v, w, status; 912 913 if (get_user(v, p) || get_user(w, p + 1)) 914 return -EFAULT; 915 switch (v) { 916 case SSIN_UACPROC: 917 w &= UAC_BITMASK; 918 status = current_thread_info()->status; 919 status = (status & ~UAC_BITMASK) | w; 920 current_thread_info()->status = status; 921 break; 922 923 default: 924 return -EOPNOTSUPP; 925 } 926 } 927 return 0; 928 } 929 930 case SSI_LMF: 931 return 0; 932 933 default: 934 break; 935 } 936 937 return -EOPNOTSUPP; 938 } 939 940 /* Translations due to the fact that OSF's time_t is an int. Which 941 affects all sorts of things, like timeval and itimerval. */ 942 943 extern struct timezone sys_tz; 944 945 struct timeval32 946 { 947 int tv_sec, tv_usec; 948 }; 949 950 struct itimerval32 951 { 952 struct timeval32 it_interval; 953 struct timeval32 it_value; 954 }; 955 956 static inline long 957 get_tv32(struct timeval *o, struct timeval32 __user *i) 958 { 959 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 960 (__get_user(o->tv_sec, &i->tv_sec) | 961 __get_user(o->tv_usec, &i->tv_usec))); 962 } 963 964 static inline long 965 put_tv32(struct timeval32 __user *o, struct timeval *i) 966 { 967 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 968 (__put_user(i->tv_sec, &o->tv_sec) | 969 __put_user(i->tv_usec, &o->tv_usec))); 970 } 971 972 static inline long 973 get_it32(struct itimerval *o, struct itimerval32 __user *i) 974 { 975 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 976 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 977 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 978 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 979 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 980 } 981 982 static inline long 983 put_it32(struct itimerval32 __user *o, struct itimerval *i) 984 { 985 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 986 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 987 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 988 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 989 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 990 } 991 992 static inline void 993 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 994 { 995 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 996 value->tv_sec = jiffies / HZ; 997 } 998 999 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 1000 struct timezone __user *, tz) 1001 { 1002 if (tv) { 1003 struct timeval ktv; 1004 do_gettimeofday(&ktv); 1005 if (put_tv32(tv, &ktv)) 1006 return -EFAULT; 1007 } 1008 if (tz) { 1009 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 1010 return -EFAULT; 1011 } 1012 return 0; 1013 } 1014 1015 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 1016 struct timezone __user *, tz) 1017 { 1018 struct timespec kts; 1019 struct timezone ktz; 1020 1021 if (tv) { 1022 if (get_tv32((struct timeval *)&kts, tv)) 1023 return -EFAULT; 1024 } 1025 if (tz) { 1026 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1027 return -EFAULT; 1028 } 1029 1030 kts.tv_nsec *= 1000; 1031 1032 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 1033 } 1034 1035 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 1036 { 1037 struct itimerval kit; 1038 int error; 1039 1040 error = do_getitimer(which, &kit); 1041 if (!error && put_it32(it, &kit)) 1042 error = -EFAULT; 1043 1044 return error; 1045 } 1046 1047 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 1048 struct itimerval32 __user *, out) 1049 { 1050 struct itimerval kin, kout; 1051 int error; 1052 1053 if (in) { 1054 if (get_it32(&kin, in)) 1055 return -EFAULT; 1056 } else 1057 memset(&kin, 0, sizeof(kin)); 1058 1059 error = do_setitimer(which, &kin, out ? &kout : NULL); 1060 if (error || !out) 1061 return error; 1062 1063 if (put_it32(out, &kout)) 1064 return -EFAULT; 1065 1066 return 0; 1067 1068 } 1069 1070 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1071 struct timeval32 __user *, tvs) 1072 { 1073 struct timespec tv[2]; 1074 1075 if (tvs) { 1076 struct timeval ktvs[2]; 1077 if (get_tv32(&ktvs[0], &tvs[0]) || 1078 get_tv32(&ktvs[1], &tvs[1])) 1079 return -EFAULT; 1080 1081 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 1082 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 1083 return -EINVAL; 1084 1085 tv[0].tv_sec = ktvs[0].tv_sec; 1086 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 1087 tv[1].tv_sec = ktvs[1].tv_sec; 1088 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 1089 } 1090 1091 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1092 } 1093 1094 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1095 fd_set __user *, exp, struct timeval32 __user *, tvp) 1096 { 1097 struct timespec end_time, *to = NULL; 1098 if (tvp) { 1099 time_t sec, usec; 1100 1101 to = &end_time; 1102 1103 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 1104 || __get_user(sec, &tvp->tv_sec) 1105 || __get_user(usec, &tvp->tv_usec)) { 1106 return -EFAULT; 1107 } 1108 1109 if (sec < 0 || usec < 0) 1110 return -EINVAL; 1111 1112 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 1113 return -EINVAL; 1114 1115 } 1116 1117 /* OSF does not copy back the remaining time. */ 1118 return core_sys_select(n, inp, outp, exp, to); 1119 } 1120 1121 struct rusage32 { 1122 struct timeval32 ru_utime; /* user time used */ 1123 struct timeval32 ru_stime; /* system time used */ 1124 long ru_maxrss; /* maximum resident set size */ 1125 long ru_ixrss; /* integral shared memory size */ 1126 long ru_idrss; /* integral unshared data size */ 1127 long ru_isrss; /* integral unshared stack size */ 1128 long ru_minflt; /* page reclaims */ 1129 long ru_majflt; /* page faults */ 1130 long ru_nswap; /* swaps */ 1131 long ru_inblock; /* block input operations */ 1132 long ru_oublock; /* block output operations */ 1133 long ru_msgsnd; /* messages sent */ 1134 long ru_msgrcv; /* messages received */ 1135 long ru_nsignals; /* signals received */ 1136 long ru_nvcsw; /* voluntary context switches */ 1137 long ru_nivcsw; /* involuntary " */ 1138 }; 1139 1140 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1141 { 1142 struct rusage32 r; 1143 cputime_t utime, stime; 1144 1145 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1146 return -EINVAL; 1147 1148 memset(&r, 0, sizeof(r)); 1149 switch (who) { 1150 case RUSAGE_SELF: 1151 task_cputime(current, &utime, &stime); 1152 jiffies_to_timeval32(utime, &r.ru_utime); 1153 jiffies_to_timeval32(stime, &r.ru_stime); 1154 r.ru_minflt = current->min_flt; 1155 r.ru_majflt = current->maj_flt; 1156 break; 1157 case RUSAGE_CHILDREN: 1158 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1159 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1160 r.ru_minflt = current->signal->cmin_flt; 1161 r.ru_majflt = current->signal->cmaj_flt; 1162 break; 1163 } 1164 1165 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1166 } 1167 1168 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1169 struct rusage32 __user *, ur) 1170 { 1171 struct rusage r; 1172 long ret, err; 1173 unsigned int status = 0; 1174 mm_segment_t old_fs; 1175 1176 if (!ur) 1177 return sys_wait4(pid, ustatus, options, NULL); 1178 1179 old_fs = get_fs(); 1180 1181 set_fs (KERNEL_DS); 1182 ret = sys_wait4(pid, (unsigned int __user *) &status, options, 1183 (struct rusage __user *) &r); 1184 set_fs (old_fs); 1185 1186 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1187 return -EFAULT; 1188 1189 err = 0; 1190 err |= put_user(status, ustatus); 1191 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1192 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1193 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1194 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1195 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1196 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1197 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1198 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1199 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1200 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1201 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1202 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1203 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1204 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1205 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1206 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1207 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1208 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1209 1210 return err ? err : ret; 1211 } 1212 1213 /* 1214 * I don't know what the parameters are: the first one 1215 * seems to be a timeval pointer, and I suspect the second 1216 * one is the time remaining.. Ho humm.. No documentation. 1217 */ 1218 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1219 struct timeval32 __user *, remain) 1220 { 1221 struct timeval tmp; 1222 unsigned long ticks; 1223 1224 if (get_tv32(&tmp, sleep)) 1225 goto fault; 1226 1227 ticks = timeval_to_jiffies(&tmp); 1228 1229 ticks = schedule_timeout_interruptible(ticks); 1230 1231 if (remain) { 1232 jiffies_to_timeval(ticks, &tmp); 1233 if (put_tv32(remain, &tmp)) 1234 goto fault; 1235 } 1236 1237 return 0; 1238 fault: 1239 return -EFAULT; 1240 } 1241 1242 1243 struct timex32 { 1244 unsigned int modes; /* mode selector */ 1245 long offset; /* time offset (usec) */ 1246 long freq; /* frequency offset (scaled ppm) */ 1247 long maxerror; /* maximum error (usec) */ 1248 long esterror; /* estimated error (usec) */ 1249 int status; /* clock command/status */ 1250 long constant; /* pll time constant */ 1251 long precision; /* clock precision (usec) (read only) */ 1252 long tolerance; /* clock frequency tolerance (ppm) 1253 * (read only) 1254 */ 1255 struct timeval32 time; /* (read only) */ 1256 long tick; /* (modified) usecs between clock ticks */ 1257 1258 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1259 long jitter; /* pps jitter (us) (ro) */ 1260 int shift; /* interval duration (s) (shift) (ro) */ 1261 long stabil; /* pps stability (scaled ppm) (ro) */ 1262 long jitcnt; /* jitter limit exceeded (ro) */ 1263 long calcnt; /* calibration intervals (ro) */ 1264 long errcnt; /* calibration errors (ro) */ 1265 long stbcnt; /* stability limit exceeded (ro) */ 1266 1267 int :32; int :32; int :32; int :32; 1268 int :32; int :32; int :32; int :32; 1269 int :32; int :32; int :32; int :32; 1270 }; 1271 1272 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1273 { 1274 struct timex txc; 1275 int ret; 1276 1277 /* copy relevant bits of struct timex. */ 1278 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1279 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1280 offsetof(struct timex32, time))) 1281 return -EFAULT; 1282 1283 ret = do_adjtimex(&txc); 1284 if (ret < 0) 1285 return ret; 1286 1287 /* copy back to timex32 */ 1288 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1289 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1290 offsetof(struct timex32, tick))) || 1291 (put_tv32(&txc_p->time, &txc.time))) 1292 return -EFAULT; 1293 1294 return ret; 1295 } 1296 1297 /* Get an address range which is currently unmapped. Similar to the 1298 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1299 1300 static unsigned long 1301 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1302 unsigned long limit) 1303 { 1304 struct vm_unmapped_area_info info; 1305 1306 info.flags = 0; 1307 info.length = len; 1308 info.low_limit = addr; 1309 info.high_limit = limit; 1310 info.align_mask = 0; 1311 info.align_offset = 0; 1312 return vm_unmapped_area(&info); 1313 } 1314 1315 unsigned long 1316 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1317 unsigned long len, unsigned long pgoff, 1318 unsigned long flags) 1319 { 1320 unsigned long limit; 1321 1322 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1323 if (current->personality & ADDR_LIMIT_32BIT) 1324 limit = 0x80000000; 1325 else 1326 limit = TASK_SIZE; 1327 1328 if (len > limit) 1329 return -ENOMEM; 1330 1331 if (flags & MAP_FIXED) 1332 return addr; 1333 1334 /* First, see if the given suggestion fits. 1335 1336 The OSF/1 loader (/sbin/loader) relies on us returning an 1337 address larger than the requested if one exists, which is 1338 a terribly broken way to program. 1339 1340 That said, I can see the use in being able to suggest not 1341 merely specific addresses, but regions of memory -- perhaps 1342 this feature should be incorporated into all ports? */ 1343 1344 if (addr) { 1345 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1346 if (addr != (unsigned long) -ENOMEM) 1347 return addr; 1348 } 1349 1350 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1351 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1352 len, limit); 1353 if (addr != (unsigned long) -ENOMEM) 1354 return addr; 1355 1356 /* Finally, try allocating in low memory. */ 1357 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1358 1359 return addr; 1360 } 1361 1362 #ifdef CONFIG_OSF4_COMPAT 1363 1364 /* Clear top 32 bits of iov_len in the user's buffer for 1365 compatibility with old versions of OSF/1 where iov_len 1366 was defined as int. */ 1367 static int 1368 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1369 { 1370 unsigned long i; 1371 1372 for (i = 0 ; i < count ; i++) { 1373 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1374 1375 if (put_user(0, iov_len_high)) 1376 return -EFAULT; 1377 } 1378 return 0; 1379 } 1380 1381 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1382 const struct iovec __user *, vector, unsigned long, count) 1383 { 1384 if (unlikely(personality(current->personality) == PER_OSF4)) 1385 if (osf_fix_iov_len(vector, count)) 1386 return -EFAULT; 1387 return sys_readv(fd, vector, count); 1388 } 1389 1390 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1391 const struct iovec __user *, vector, unsigned long, count) 1392 { 1393 if (unlikely(personality(current->personality) == PER_OSF4)) 1394 if (osf_fix_iov_len(vector, count)) 1395 return -EFAULT; 1396 return sys_writev(fd, vector, count); 1397 } 1398 1399 #endif 1400 1401 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1402 { 1403 int prio = sys_getpriority(which, who); 1404 if (prio >= 0) { 1405 /* Return value is the unbiased priority, i.e. 20 - prio. 1406 This does result in negative return values, so signal 1407 no error */ 1408 force_successful_syscall_return(); 1409 prio = 20 - prio; 1410 } 1411 return prio; 1412 } 1413 1414 SYSCALL_DEFINE0(getxuid) 1415 { 1416 current_pt_regs()->r20 = sys_geteuid(); 1417 return sys_getuid(); 1418 } 1419 1420 SYSCALL_DEFINE0(getxgid) 1421 { 1422 current_pt_regs()->r20 = sys_getegid(); 1423 return sys_getgid(); 1424 } 1425 1426 SYSCALL_DEFINE0(getxpid) 1427 { 1428 current_pt_regs()->r20 = sys_getppid(); 1429 return sys_getpid(); 1430 } 1431 1432 SYSCALL_DEFINE0(alpha_pipe) 1433 { 1434 int fd[2]; 1435 int res = do_pipe_flags(fd, 0); 1436 if (!res) { 1437 /* The return values are in $0 and $20. */ 1438 current_pt_regs()->r20 = fd[1]; 1439 res = fd[0]; 1440 } 1441 return res; 1442 } 1443 1444 SYSCALL_DEFINE1(sethae, unsigned long, val) 1445 { 1446 current_pt_regs()->hae = val; 1447 return 0; 1448 } 1449