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/signal.h> 15 #include <linux/sched/mm.h> 16 #include <linux/sched/task_stack.h> 17 #include <linux/sched/cputime.h> 18 #include <linux/kernel.h> 19 #include <linux/mm.h> 20 #include <linux/smp.h> 21 #include <linux/stddef.h> 22 #include <linux/syscalls.h> 23 #include <linux/unistd.h> 24 #include <linux/ptrace.h> 25 #include <linux/user.h> 26 #include <linux/utsname.h> 27 #include <linux/time.h> 28 #include <linux/timex.h> 29 #include <linux/major.h> 30 #include <linux/stat.h> 31 #include <linux/mman.h> 32 #include <linux/shm.h> 33 #include <linux/poll.h> 34 #include <linux/file.h> 35 #include <linux/types.h> 36 #include <linux/ipc.h> 37 #include <linux/namei.h> 38 #include <linux/uio.h> 39 #include <linux/vfs.h> 40 #include <linux/rcupdate.h> 41 #include <linux/slab.h> 42 43 #include <asm/fpu.h> 44 #include <asm/io.h> 45 #include <linux/uaccess.h> 46 #include <asm/sysinfo.h> 47 #include <asm/thread_info.h> 48 #include <asm/hwrpb.h> 49 #include <asm/processor.h> 50 51 /* 52 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 53 * which OSF programs just shouldn't be doing. We're still not quite 54 * identical to OSF as we don't return 0 on success, but doing otherwise 55 * would require changes to libc. Hopefully this is good enough. 56 */ 57 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 58 { 59 unsigned long retval = sys_brk(brk); 60 if (brk && brk != retval) 61 retval = -ENOMEM; 62 return retval; 63 } 64 65 /* 66 * This is pure guess-work.. 67 */ 68 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 69 unsigned long, text_len, unsigned long, bss_start, 70 unsigned long, bss_len) 71 { 72 struct mm_struct *mm; 73 74 mm = current->mm; 75 mm->end_code = bss_start + bss_len; 76 mm->start_brk = bss_start + bss_len; 77 mm->brk = bss_start + bss_len; 78 #if 0 79 printk("set_program_attributes(%lx %lx %lx %lx)\n", 80 text_start, text_len, bss_start, bss_len); 81 #endif 82 return 0; 83 } 84 85 /* 86 * OSF/1 directory handling functions... 87 * 88 * The "getdents()" interface is much more sane: the "basep" stuff is 89 * braindamage (it can't really handle filesystems where the directory 90 * offset differences aren't the same as "d_reclen"). 91 */ 92 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 93 94 struct osf_dirent { 95 unsigned int d_ino; 96 unsigned short d_reclen; 97 unsigned short d_namlen; 98 char d_name[1]; 99 }; 100 101 struct osf_dirent_callback { 102 struct dir_context ctx; 103 struct osf_dirent __user *dirent; 104 long __user *basep; 105 unsigned int count; 106 int error; 107 }; 108 109 static int 110 osf_filldir(struct dir_context *ctx, const char *name, int namlen, 111 loff_t offset, u64 ino, unsigned int d_type) 112 { 113 struct osf_dirent __user *dirent; 114 struct osf_dirent_callback *buf = 115 container_of(ctx, struct osf_dirent_callback, ctx); 116 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 117 unsigned int d_ino; 118 119 buf->error = -EINVAL; /* only used if we fail */ 120 if (reclen > buf->count) 121 return -EINVAL; 122 d_ino = ino; 123 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 124 buf->error = -EOVERFLOW; 125 return -EOVERFLOW; 126 } 127 if (buf->basep) { 128 if (put_user(offset, buf->basep)) 129 goto Efault; 130 buf->basep = NULL; 131 } 132 dirent = buf->dirent; 133 if (put_user(d_ino, &dirent->d_ino) || 134 put_user(namlen, &dirent->d_namlen) || 135 put_user(reclen, &dirent->d_reclen) || 136 copy_to_user(dirent->d_name, name, namlen) || 137 put_user(0, dirent->d_name + namlen)) 138 goto Efault; 139 dirent = (void __user *)dirent + reclen; 140 buf->dirent = dirent; 141 buf->count -= reclen; 142 return 0; 143 Efault: 144 buf->error = -EFAULT; 145 return -EFAULT; 146 } 147 148 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 149 struct osf_dirent __user *, dirent, unsigned int, count, 150 long __user *, basep) 151 { 152 int error; 153 struct fd arg = fdget_pos(fd); 154 struct osf_dirent_callback buf = { 155 .ctx.actor = osf_filldir, 156 .dirent = dirent, 157 .basep = basep, 158 .count = count 159 }; 160 161 if (!arg.file) 162 return -EBADF; 163 164 error = iterate_dir(arg.file, &buf.ctx); 165 if (error >= 0) 166 error = buf.error; 167 if (count != buf.count) 168 error = count - buf.count; 169 170 fdput_pos(arg); 171 return error; 172 } 173 174 #undef NAME_OFFSET 175 176 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 177 unsigned long, prot, unsigned long, flags, unsigned long, fd, 178 unsigned long, off) 179 { 180 unsigned long ret = -EINVAL; 181 182 #if 0 183 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 184 printk("%s: unimplemented OSF mmap flags %04lx\n", 185 current->comm, flags); 186 #endif 187 if ((off + PAGE_ALIGN(len)) < off) 188 goto out; 189 if (off & ~PAGE_MASK) 190 goto out; 191 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 192 out: 193 return ret; 194 } 195 196 struct osf_stat { 197 int st_dev; 198 int st_pad1; 199 unsigned st_mode; 200 unsigned short st_nlink; 201 short st_nlink_reserved; 202 unsigned st_uid; 203 unsigned st_gid; 204 int st_rdev; 205 int st_ldev; 206 long st_size; 207 int st_pad2; 208 int st_uatime; 209 int st_pad3; 210 int st_umtime; 211 int st_pad4; 212 int st_uctime; 213 int st_pad5; 214 int st_pad6; 215 unsigned st_flags; 216 unsigned st_gen; 217 long st_spare[4]; 218 unsigned st_ino; 219 int st_ino_reserved; 220 int st_atime; 221 int st_atime_reserved; 222 int st_mtime; 223 int st_mtime_reserved; 224 int st_ctime; 225 int st_ctime_reserved; 226 long st_blksize; 227 long st_blocks; 228 }; 229 230 /* 231 * The OSF/1 statfs structure is much larger, but this should 232 * match the beginning, at least. 233 */ 234 struct osf_statfs { 235 short f_type; 236 short f_flags; 237 int f_fsize; 238 int f_bsize; 239 int f_blocks; 240 int f_bfree; 241 int f_bavail; 242 int f_files; 243 int f_ffree; 244 __kernel_fsid_t f_fsid; 245 }; 246 247 struct osf_statfs64 { 248 short f_type; 249 short f_flags; 250 int f_pad1; 251 int f_pad2; 252 int f_pad3; 253 int f_pad4; 254 int f_pad5; 255 int f_pad6; 256 int f_pad7; 257 __kernel_fsid_t f_fsid; 258 u_short f_namemax; 259 short f_reserved1; 260 int f_spare[8]; 261 char f_pad8[90]; 262 char f_pad9[90]; 263 long mount_info[10]; 264 u_long f_flags2; 265 long f_spare2[14]; 266 long f_fsize; 267 long f_bsize; 268 long f_blocks; 269 long f_bfree; 270 long f_bavail; 271 long f_files; 272 long f_ffree; 273 }; 274 275 static int 276 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) 277 { 278 struct osf_stat tmp = { 0 }; 279 280 tmp.st_dev = lstat->dev; 281 tmp.st_mode = lstat->mode; 282 tmp.st_nlink = lstat->nlink; 283 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid); 284 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid); 285 tmp.st_rdev = lstat->rdev; 286 tmp.st_ldev = lstat->rdev; 287 tmp.st_size = lstat->size; 288 tmp.st_uatime = lstat->atime.tv_nsec / 1000; 289 tmp.st_umtime = lstat->mtime.tv_nsec / 1000; 290 tmp.st_uctime = lstat->ctime.tv_nsec / 1000; 291 tmp.st_ino = lstat->ino; 292 tmp.st_atime = lstat->atime.tv_sec; 293 tmp.st_mtime = lstat->mtime.tv_sec; 294 tmp.st_ctime = lstat->ctime.tv_sec; 295 tmp.st_blksize = lstat->blksize; 296 tmp.st_blocks = lstat->blocks; 297 298 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; 299 } 300 301 static int 302 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 303 unsigned long bufsiz) 304 { 305 struct osf_statfs tmp_stat; 306 307 tmp_stat.f_type = linux_stat->f_type; 308 tmp_stat.f_flags = 0; /* mount flags */ 309 tmp_stat.f_fsize = linux_stat->f_frsize; 310 tmp_stat.f_bsize = linux_stat->f_bsize; 311 tmp_stat.f_blocks = linux_stat->f_blocks; 312 tmp_stat.f_bfree = linux_stat->f_bfree; 313 tmp_stat.f_bavail = linux_stat->f_bavail; 314 tmp_stat.f_files = linux_stat->f_files; 315 tmp_stat.f_ffree = linux_stat->f_ffree; 316 tmp_stat.f_fsid = linux_stat->f_fsid; 317 if (bufsiz > sizeof(tmp_stat)) 318 bufsiz = sizeof(tmp_stat); 319 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 320 } 321 322 static int 323 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, 324 unsigned long bufsiz) 325 { 326 struct osf_statfs64 tmp_stat = { 0 }; 327 328 tmp_stat.f_type = linux_stat->f_type; 329 tmp_stat.f_fsize = linux_stat->f_frsize; 330 tmp_stat.f_bsize = linux_stat->f_bsize; 331 tmp_stat.f_blocks = linux_stat->f_blocks; 332 tmp_stat.f_bfree = linux_stat->f_bfree; 333 tmp_stat.f_bavail = linux_stat->f_bavail; 334 tmp_stat.f_files = linux_stat->f_files; 335 tmp_stat.f_ffree = linux_stat->f_ffree; 336 tmp_stat.f_fsid = linux_stat->f_fsid; 337 if (bufsiz > sizeof(tmp_stat)) 338 bufsiz = sizeof(tmp_stat); 339 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 340 } 341 342 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 343 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 344 { 345 struct kstatfs linux_stat; 346 int error = user_statfs(pathname, &linux_stat); 347 if (!error) 348 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 349 return error; 350 } 351 352 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) 353 { 354 struct kstat stat; 355 int error; 356 357 error = vfs_stat(name, &stat); 358 if (error) 359 return error; 360 361 return linux_to_osf_stat(&stat, buf); 362 } 363 364 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) 365 { 366 struct kstat stat; 367 int error; 368 369 error = vfs_lstat(name, &stat); 370 if (error) 371 return error; 372 373 return linux_to_osf_stat(&stat, buf); 374 } 375 376 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) 377 { 378 struct kstat stat; 379 int error; 380 381 error = vfs_fstat(fd, &stat); 382 if (error) 383 return error; 384 385 return linux_to_osf_stat(&stat, buf); 386 } 387 388 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 389 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 390 { 391 struct kstatfs linux_stat; 392 int error = fd_statfs(fd, &linux_stat); 393 if (!error) 394 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 395 return error; 396 } 397 398 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, 399 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 400 { 401 struct kstatfs linux_stat; 402 int error = user_statfs(pathname, &linux_stat); 403 if (!error) 404 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 405 return error; 406 } 407 408 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, 409 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 410 { 411 struct kstatfs linux_stat; 412 int error = fd_statfs(fd, &linux_stat); 413 if (!error) 414 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 415 return error; 416 } 417 418 /* 419 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 420 * 421 * Although to be frank, neither are the native Linux/i386 ones.. 422 */ 423 struct ufs_args { 424 char __user *devname; 425 int flags; 426 uid_t exroot; 427 }; 428 429 struct cdfs_args { 430 char __user *devname; 431 int flags; 432 uid_t exroot; 433 434 /* This has lots more here, which Linux handles with the option block 435 but I'm too lazy to do the translation into ASCII. */ 436 }; 437 438 struct procfs_args { 439 char __user *devname; 440 int flags; 441 uid_t exroot; 442 }; 443 444 /* 445 * We can't actually handle ufs yet, so we translate UFS mounts to 446 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 447 * layout is so braindead it's a major headache doing it. 448 * 449 * Just how long ago was it written? OTOH our UFS driver may be still 450 * unhappy with OSF UFS. [CHECKME] 451 */ 452 static int 453 osf_ufs_mount(const char __user *dirname, 454 struct ufs_args __user *args, int flags) 455 { 456 int retval; 457 struct cdfs_args tmp; 458 struct filename *devname; 459 460 retval = -EFAULT; 461 if (copy_from_user(&tmp, args, sizeof(tmp))) 462 goto out; 463 devname = getname(tmp.devname); 464 retval = PTR_ERR(devname); 465 if (IS_ERR(devname)) 466 goto out; 467 retval = do_mount(devname->name, dirname, "ext2", flags, NULL); 468 putname(devname); 469 out: 470 return retval; 471 } 472 473 static int 474 osf_cdfs_mount(const char __user *dirname, 475 struct cdfs_args __user *args, int flags) 476 { 477 int retval; 478 struct cdfs_args tmp; 479 struct filename *devname; 480 481 retval = -EFAULT; 482 if (copy_from_user(&tmp, args, sizeof(tmp))) 483 goto out; 484 devname = getname(tmp.devname); 485 retval = PTR_ERR(devname); 486 if (IS_ERR(devname)) 487 goto out; 488 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); 489 putname(devname); 490 out: 491 return retval; 492 } 493 494 static int 495 osf_procfs_mount(const char __user *dirname, 496 struct procfs_args __user *args, int flags) 497 { 498 struct procfs_args tmp; 499 500 if (copy_from_user(&tmp, args, sizeof(tmp))) 501 return -EFAULT; 502 503 return do_mount("", dirname, "proc", flags, NULL); 504 } 505 506 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 507 int, flag, void __user *, data) 508 { 509 int retval; 510 511 switch (typenr) { 512 case 1: 513 retval = osf_ufs_mount(path, data, flag); 514 break; 515 case 6: 516 retval = osf_cdfs_mount(path, data, flag); 517 break; 518 case 9: 519 retval = osf_procfs_mount(path, data, flag); 520 break; 521 default: 522 retval = -EINVAL; 523 printk("osf_mount(%ld, %x)\n", typenr, flag); 524 } 525 526 return retval; 527 } 528 529 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 530 { 531 int error; 532 533 down_read(&uts_sem); 534 error = -EFAULT; 535 if (copy_to_user(name + 0, utsname()->sysname, 32)) 536 goto out; 537 if (copy_to_user(name + 32, utsname()->nodename, 32)) 538 goto out; 539 if (copy_to_user(name + 64, utsname()->release, 32)) 540 goto out; 541 if (copy_to_user(name + 96, utsname()->version, 32)) 542 goto out; 543 if (copy_to_user(name + 128, utsname()->machine, 32)) 544 goto out; 545 546 error = 0; 547 out: 548 up_read(&uts_sem); 549 return error; 550 } 551 552 SYSCALL_DEFINE0(getpagesize) 553 { 554 return PAGE_SIZE; 555 } 556 557 SYSCALL_DEFINE0(getdtablesize) 558 { 559 return sysctl_nr_open; 560 } 561 562 /* 563 * For compatibility with OSF/1 only. Use utsname(2) instead. 564 */ 565 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 566 { 567 int len, err = 0; 568 char *kname; 569 570 if (namelen > 32) 571 namelen = 32; 572 573 down_read(&uts_sem); 574 kname = utsname()->domainname; 575 len = strnlen(kname, namelen); 576 if (copy_to_user(name, kname, min(len + 1, namelen))) 577 err = -EFAULT; 578 up_read(&uts_sem); 579 580 return err; 581 } 582 583 /* 584 * The following stuff should move into a header file should it ever 585 * be labeled "officially supported." Right now, there is just enough 586 * support to avoid applications (such as tar) printing error 587 * messages. The attributes are not really implemented. 588 */ 589 590 /* 591 * Values for Property list entry flag 592 */ 593 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 594 by default */ 595 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 596 #define PLE_FLAG_ALL -1 /* All flag value */ 597 598 struct proplistname_args { 599 unsigned int pl_mask; 600 unsigned int pl_numnames; 601 char **pl_names; 602 }; 603 604 union pl_args { 605 struct setargs { 606 char __user *path; 607 long follow; 608 long nbytes; 609 char __user *buf; 610 } set; 611 struct fsetargs { 612 long fd; 613 long nbytes; 614 char __user *buf; 615 } fset; 616 struct getargs { 617 char __user *path; 618 long follow; 619 struct proplistname_args __user *name_args; 620 long nbytes; 621 char __user *buf; 622 int __user *min_buf_size; 623 } get; 624 struct fgetargs { 625 long fd; 626 struct proplistname_args __user *name_args; 627 long nbytes; 628 char __user *buf; 629 int __user *min_buf_size; 630 } fget; 631 struct delargs { 632 char __user *path; 633 long follow; 634 struct proplistname_args __user *name_args; 635 } del; 636 struct fdelargs { 637 long fd; 638 struct proplistname_args __user *name_args; 639 } fdel; 640 }; 641 642 enum pl_code { 643 PL_SET = 1, PL_FSET = 2, 644 PL_GET = 3, PL_FGET = 4, 645 PL_DEL = 5, PL_FDEL = 6 646 }; 647 648 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 649 union pl_args __user *, args) 650 { 651 long error; 652 int __user *min_buf_size_ptr; 653 654 switch (code) { 655 case PL_SET: 656 if (get_user(error, &args->set.nbytes)) 657 error = -EFAULT; 658 break; 659 case PL_FSET: 660 if (get_user(error, &args->fset.nbytes)) 661 error = -EFAULT; 662 break; 663 case PL_GET: 664 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 665 if (error) 666 break; 667 error = put_user(0, min_buf_size_ptr); 668 break; 669 case PL_FGET: 670 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 671 if (error) 672 break; 673 error = put_user(0, min_buf_size_ptr); 674 break; 675 case PL_DEL: 676 case PL_FDEL: 677 error = 0; 678 break; 679 default: 680 error = -EOPNOTSUPP; 681 break; 682 }; 683 return error; 684 } 685 686 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 687 struct sigstack __user *, uoss) 688 { 689 unsigned long usp = rdusp(); 690 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 691 unsigned long oss_os = on_sig_stack(usp); 692 int error; 693 694 if (uss) { 695 void __user *ss_sp; 696 697 error = -EFAULT; 698 if (get_user(ss_sp, &uss->ss_sp)) 699 goto out; 700 701 /* If the current stack was set with sigaltstack, don't 702 swap stacks while we are on it. */ 703 error = -EPERM; 704 if (current->sas_ss_sp && on_sig_stack(usp)) 705 goto out; 706 707 /* Since we don't know the extent of the stack, and we don't 708 track onstack-ness, but rather calculate it, we must 709 presume a size. Ho hum this interface is lossy. */ 710 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 711 current->sas_ss_size = SIGSTKSZ; 712 } 713 714 if (uoss) { 715 error = -EFAULT; 716 if (put_user(oss_sp, &uoss->ss_sp) || 717 put_user(oss_os, &uoss->ss_onstack)) 718 goto out; 719 } 720 721 error = 0; 722 out: 723 return error; 724 } 725 726 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 727 { 728 const char *sysinfo_table[] = { 729 utsname()->sysname, 730 utsname()->nodename, 731 utsname()->release, 732 utsname()->version, 733 utsname()->machine, 734 "alpha", /* instruction set architecture */ 735 "dummy", /* hardware serial number */ 736 "dummy", /* hardware manufacturer */ 737 "dummy", /* secure RPC domain */ 738 }; 739 unsigned long offset; 740 const char *res; 741 long len, err = -EINVAL; 742 743 offset = command-1; 744 if (offset >= ARRAY_SIZE(sysinfo_table)) { 745 /* Digital UNIX has a few unpublished interfaces here */ 746 printk("sysinfo(%d)", command); 747 goto out; 748 } 749 750 down_read(&uts_sem); 751 res = sysinfo_table[offset]; 752 len = strlen(res)+1; 753 if ((unsigned long)len > (unsigned long)count) 754 len = count; 755 if (copy_to_user(buf, res, len)) 756 err = -EFAULT; 757 else 758 err = 0; 759 up_read(&uts_sem); 760 out: 761 return err; 762 } 763 764 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 765 unsigned long, nbytes, int __user *, start, void __user *, arg) 766 { 767 unsigned long w; 768 struct percpu_struct *cpu; 769 770 switch (op) { 771 case GSI_IEEE_FP_CONTROL: 772 /* Return current software fp control & status bits. */ 773 /* Note that DU doesn't verify available space here. */ 774 775 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 776 w = swcr_update_status(w, rdfpcr()); 777 if (put_user(w, (unsigned long __user *) buffer)) 778 return -EFAULT; 779 return 0; 780 781 case GSI_IEEE_STATE_AT_SIGNAL: 782 /* 783 * Not sure anybody will ever use this weird stuff. These 784 * ops can be used (under OSF/1) to set the fpcr that should 785 * be used when a signal handler starts executing. 786 */ 787 break; 788 789 case GSI_UACPROC: 790 if (nbytes < sizeof(unsigned int)) 791 return -EINVAL; 792 w = current_thread_info()->status & UAC_BITMASK; 793 if (put_user(w, (unsigned int __user *)buffer)) 794 return -EFAULT; 795 return 1; 796 797 case GSI_PROC_TYPE: 798 if (nbytes < sizeof(unsigned long)) 799 return -EINVAL; 800 cpu = (struct percpu_struct*) 801 ((char*)hwrpb + hwrpb->processor_offset); 802 w = cpu->type; 803 if (put_user(w, (unsigned long __user*)buffer)) 804 return -EFAULT; 805 return 1; 806 807 case GSI_GET_HWRPB: 808 if (nbytes > sizeof(*hwrpb)) 809 return -EINVAL; 810 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 811 return -EFAULT; 812 return 1; 813 814 default: 815 break; 816 } 817 818 return -EOPNOTSUPP; 819 } 820 821 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 822 unsigned long, nbytes, int __user *, start, void __user *, arg) 823 { 824 switch (op) { 825 case SSI_IEEE_FP_CONTROL: { 826 unsigned long swcr, fpcr; 827 unsigned int *state; 828 829 /* 830 * Alpha Architecture Handbook 4.7.7.3: 831 * To be fully IEEE compiant, we must track the current IEEE 832 * exception state in software, because spurious bits can be 833 * set in the trap shadow of a software-complete insn. 834 */ 835 836 if (get_user(swcr, (unsigned long __user *)buffer)) 837 return -EFAULT; 838 state = ¤t_thread_info()->ieee_state; 839 840 /* Update softare trap enable bits. */ 841 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 842 843 /* Update the real fpcr. */ 844 fpcr = rdfpcr() & FPCR_DYN_MASK; 845 fpcr |= ieee_swcr_to_fpcr(swcr); 846 wrfpcr(fpcr); 847 848 return 0; 849 } 850 851 case SSI_IEEE_RAISE_EXCEPTION: { 852 unsigned long exc, swcr, fpcr, fex; 853 unsigned int *state; 854 855 if (get_user(exc, (unsigned long __user *)buffer)) 856 return -EFAULT; 857 state = ¤t_thread_info()->ieee_state; 858 exc &= IEEE_STATUS_MASK; 859 860 /* Update softare trap enable bits. */ 861 swcr = (*state & IEEE_SW_MASK) | exc; 862 *state |= exc; 863 864 /* Update the real fpcr. */ 865 fpcr = rdfpcr(); 866 fpcr |= ieee_swcr_to_fpcr(swcr); 867 wrfpcr(fpcr); 868 869 /* If any exceptions set by this call, and are unmasked, 870 send a signal. Old exceptions are not signaled. */ 871 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 872 if (fex) { 873 siginfo_t info; 874 int si_code = 0; 875 876 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 877 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 878 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 879 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 880 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 881 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 882 883 info.si_signo = SIGFPE; 884 info.si_errno = 0; 885 info.si_code = si_code; 886 info.si_addr = NULL; /* FIXME */ 887 send_sig_info(SIGFPE, &info, current); 888 } 889 return 0; 890 } 891 892 case SSI_IEEE_STATE_AT_SIGNAL: 893 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 894 /* 895 * Not sure anybody will ever use this weird stuff. These 896 * ops can be used (under OSF/1) to set the fpcr that should 897 * be used when a signal handler starts executing. 898 */ 899 break; 900 901 case SSI_NVPAIRS: { 902 unsigned __user *p = buffer; 903 unsigned i; 904 905 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 906 unsigned v, w, status; 907 908 if (get_user(v, p) || get_user(w, p + 1)) 909 return -EFAULT; 910 switch (v) { 911 case SSIN_UACPROC: 912 w &= UAC_BITMASK; 913 status = current_thread_info()->status; 914 status = (status & ~UAC_BITMASK) | w; 915 current_thread_info()->status = status; 916 break; 917 918 default: 919 return -EOPNOTSUPP; 920 } 921 } 922 return 0; 923 } 924 925 case SSI_LMF: 926 return 0; 927 928 default: 929 break; 930 } 931 932 return -EOPNOTSUPP; 933 } 934 935 /* Translations due to the fact that OSF's time_t is an int. Which 936 affects all sorts of things, like timeval and itimerval. */ 937 938 extern struct timezone sys_tz; 939 940 struct timeval32 941 { 942 int tv_sec, tv_usec; 943 }; 944 945 struct itimerval32 946 { 947 struct timeval32 it_interval; 948 struct timeval32 it_value; 949 }; 950 951 static inline long 952 get_tv32(struct timeval *o, struct timeval32 __user *i) 953 { 954 struct timeval32 tv; 955 if (copy_from_user(&tv, i, sizeof(struct timeval32))) 956 return -EFAULT; 957 o->tv_sec = tv.tv_sec; 958 o->tv_usec = tv.tv_usec; 959 return 0; 960 } 961 962 static inline long 963 put_tv32(struct timeval32 __user *o, struct timeval *i) 964 { 965 return copy_to_user(o, &(struct timeval32){ 966 .tv_sec = o->tv_sec, 967 .tv_usec = o->tv_usec}, 968 sizeof(struct timeval32)); 969 } 970 971 static inline long 972 get_it32(struct itimerval *o, struct itimerval32 __user *i) 973 { 974 struct itimerval32 itv; 975 if (copy_from_user(&itv, i, sizeof(struct itimerval32))) 976 return -EFAULT; 977 o->it_interval.tv_sec = itv.it_interval.tv_sec; 978 o->it_interval.tv_usec = itv.it_interval.tv_usec; 979 o->it_value.tv_sec = itv.it_value.tv_sec; 980 o->it_value.tv_usec = itv.it_value.tv_usec; 981 return 0; 982 } 983 984 static inline long 985 put_it32(struct itimerval32 __user *o, struct itimerval *i) 986 { 987 return copy_to_user(o, &(struct itimerval32){ 988 .it_interval.tv_sec = o->it_interval.tv_sec, 989 .it_interval.tv_usec = o->it_interval.tv_usec, 990 .it_value.tv_sec = o->it_value.tv_sec, 991 .it_value.tv_usec = o->it_value.tv_usec}, 992 sizeof(struct itimerval32)); 993 } 994 995 static inline void 996 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 997 { 998 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 999 value->tv_sec = jiffies / HZ; 1000 } 1001 1002 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 1003 struct timezone __user *, tz) 1004 { 1005 if (tv) { 1006 struct timeval ktv; 1007 do_gettimeofday(&ktv); 1008 if (put_tv32(tv, &ktv)) 1009 return -EFAULT; 1010 } 1011 if (tz) { 1012 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 1013 return -EFAULT; 1014 } 1015 return 0; 1016 } 1017 1018 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 1019 struct timezone __user *, tz) 1020 { 1021 struct timespec64 kts64; 1022 struct timespec kts; 1023 struct timezone ktz; 1024 1025 if (tv) { 1026 if (get_tv32((struct timeval *)&kts, tv)) 1027 return -EFAULT; 1028 kts.tv_nsec *= 1000; 1029 kts64 = timespec_to_timespec64(kts); 1030 } 1031 if (tz) { 1032 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1033 return -EFAULT; 1034 } 1035 1036 return do_sys_settimeofday64(tv ? &kts64 : NULL, tz ? &ktz : NULL); 1037 } 1038 1039 asmlinkage long sys_ni_posix_timers(void); 1040 1041 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 1042 { 1043 struct itimerval kit; 1044 int error; 1045 1046 if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) 1047 return sys_ni_posix_timers(); 1048 1049 error = do_getitimer(which, &kit); 1050 if (!error && put_it32(it, &kit)) 1051 error = -EFAULT; 1052 1053 return error; 1054 } 1055 1056 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 1057 struct itimerval32 __user *, out) 1058 { 1059 struct itimerval kin, kout; 1060 int error; 1061 1062 if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) 1063 return sys_ni_posix_timers(); 1064 1065 if (in) { 1066 if (get_it32(&kin, in)) 1067 return -EFAULT; 1068 } else 1069 memset(&kin, 0, sizeof(kin)); 1070 1071 error = do_setitimer(which, &kin, out ? &kout : NULL); 1072 if (error || !out) 1073 return error; 1074 1075 if (put_it32(out, &kout)) 1076 return -EFAULT; 1077 1078 return 0; 1079 1080 } 1081 1082 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1083 struct timeval32 __user *, tvs) 1084 { 1085 struct timespec tv[2]; 1086 1087 if (tvs) { 1088 struct timeval ktvs[2]; 1089 if (get_tv32(&ktvs[0], &tvs[0]) || 1090 get_tv32(&ktvs[1], &tvs[1])) 1091 return -EFAULT; 1092 1093 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 1094 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 1095 return -EINVAL; 1096 1097 tv[0].tv_sec = ktvs[0].tv_sec; 1098 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 1099 tv[1].tv_sec = ktvs[1].tv_sec; 1100 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 1101 } 1102 1103 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1104 } 1105 1106 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1107 fd_set __user *, exp, struct timeval32 __user *, tvp) 1108 { 1109 struct timespec end_time, *to = NULL; 1110 if (tvp) { 1111 struct timeval tv; 1112 to = &end_time; 1113 1114 if (get_tv32(&tv, tvp)) 1115 return -EFAULT; 1116 1117 if (tv.tv_sec < 0 || tv.tv_usec < 0) 1118 return -EINVAL; 1119 1120 if (poll_select_set_timeout(to, tv.tv_sec, 1121 tv.tv_usec * NSEC_PER_USEC)) 1122 return -EINVAL; 1123 1124 } 1125 1126 /* OSF does not copy back the remaining time. */ 1127 return core_sys_select(n, inp, outp, exp, to); 1128 } 1129 1130 struct rusage32 { 1131 struct timeval32 ru_utime; /* user time used */ 1132 struct timeval32 ru_stime; /* system time used */ 1133 long ru_maxrss; /* maximum resident set size */ 1134 long ru_ixrss; /* integral shared memory size */ 1135 long ru_idrss; /* integral unshared data size */ 1136 long ru_isrss; /* integral unshared stack size */ 1137 long ru_minflt; /* page reclaims */ 1138 long ru_majflt; /* page faults */ 1139 long ru_nswap; /* swaps */ 1140 long ru_inblock; /* block input operations */ 1141 long ru_oublock; /* block output operations */ 1142 long ru_msgsnd; /* messages sent */ 1143 long ru_msgrcv; /* messages received */ 1144 long ru_nsignals; /* signals received */ 1145 long ru_nvcsw; /* voluntary context switches */ 1146 long ru_nivcsw; /* involuntary " */ 1147 }; 1148 1149 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1150 { 1151 struct rusage32 r; 1152 u64 utime, stime; 1153 unsigned long utime_jiffies, stime_jiffies; 1154 1155 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1156 return -EINVAL; 1157 1158 memset(&r, 0, sizeof(r)); 1159 switch (who) { 1160 case RUSAGE_SELF: 1161 task_cputime(current, &utime, &stime); 1162 utime_jiffies = nsecs_to_jiffies(utime); 1163 stime_jiffies = nsecs_to_jiffies(stime); 1164 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1165 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1166 r.ru_minflt = current->min_flt; 1167 r.ru_majflt = current->maj_flt; 1168 break; 1169 case RUSAGE_CHILDREN: 1170 utime_jiffies = nsecs_to_jiffies(current->signal->cutime); 1171 stime_jiffies = nsecs_to_jiffies(current->signal->cstime); 1172 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1173 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1174 r.ru_minflt = current->signal->cmin_flt; 1175 r.ru_majflt = current->signal->cmaj_flt; 1176 break; 1177 } 1178 1179 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1180 } 1181 1182 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1183 struct rusage32 __user *, ur) 1184 { 1185 unsigned int status = 0; 1186 struct rusage r; 1187 long err = kernel_wait4(pid, &status, options, &r); 1188 if (err <= 0) 1189 return err; 1190 if (put_user(status, ustatus)) 1191 return -EFAULT; 1192 if (!ur) 1193 return err; 1194 if (put_tv32(&ur->ru_utime, &r.ru_utime)) 1195 return -EFAULT; 1196 if (put_tv32(&ur->ru_stime, &r.ru_stime)) 1197 return -EFAULT; 1198 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, 1199 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) 1200 return -EFAULT; 1201 return err; 1202 } 1203 1204 /* 1205 * I don't know what the parameters are: the first one 1206 * seems to be a timeval pointer, and I suspect the second 1207 * one is the time remaining.. Ho humm.. No documentation. 1208 */ 1209 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1210 struct timeval32 __user *, remain) 1211 { 1212 struct timeval tmp; 1213 unsigned long ticks; 1214 1215 if (get_tv32(&tmp, sleep)) 1216 goto fault; 1217 1218 ticks = timeval_to_jiffies(&tmp); 1219 1220 ticks = schedule_timeout_interruptible(ticks); 1221 1222 if (remain) { 1223 jiffies_to_timeval(ticks, &tmp); 1224 if (put_tv32(remain, &tmp)) 1225 goto fault; 1226 } 1227 1228 return 0; 1229 fault: 1230 return -EFAULT; 1231 } 1232 1233 1234 struct timex32 { 1235 unsigned int modes; /* mode selector */ 1236 long offset; /* time offset (usec) */ 1237 long freq; /* frequency offset (scaled ppm) */ 1238 long maxerror; /* maximum error (usec) */ 1239 long esterror; /* estimated error (usec) */ 1240 int status; /* clock command/status */ 1241 long constant; /* pll time constant */ 1242 long precision; /* clock precision (usec) (read only) */ 1243 long tolerance; /* clock frequency tolerance (ppm) 1244 * (read only) 1245 */ 1246 struct timeval32 time; /* (read only) */ 1247 long tick; /* (modified) usecs between clock ticks */ 1248 1249 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1250 long jitter; /* pps jitter (us) (ro) */ 1251 int shift; /* interval duration (s) (shift) (ro) */ 1252 long stabil; /* pps stability (scaled ppm) (ro) */ 1253 long jitcnt; /* jitter limit exceeded (ro) */ 1254 long calcnt; /* calibration intervals (ro) */ 1255 long errcnt; /* calibration errors (ro) */ 1256 long stbcnt; /* stability limit exceeded (ro) */ 1257 1258 int :32; int :32; int :32; int :32; 1259 int :32; int :32; int :32; int :32; 1260 int :32; int :32; int :32; int :32; 1261 }; 1262 1263 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1264 { 1265 struct timex txc; 1266 int ret; 1267 1268 /* copy relevant bits of struct timex. */ 1269 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1270 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1271 offsetof(struct timex32, tick))) 1272 return -EFAULT; 1273 1274 ret = do_adjtimex(&txc); 1275 if (ret < 0) 1276 return ret; 1277 1278 /* copy back to timex32 */ 1279 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1280 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1281 offsetof(struct timex32, tick))) || 1282 (put_tv32(&txc_p->time, &txc.time))) 1283 return -EFAULT; 1284 1285 return ret; 1286 } 1287 1288 /* Get an address range which is currently unmapped. Similar to the 1289 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1290 1291 static unsigned long 1292 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1293 unsigned long limit) 1294 { 1295 struct vm_unmapped_area_info info; 1296 1297 info.flags = 0; 1298 info.length = len; 1299 info.low_limit = addr; 1300 info.high_limit = limit; 1301 info.align_mask = 0; 1302 info.align_offset = 0; 1303 return vm_unmapped_area(&info); 1304 } 1305 1306 unsigned long 1307 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1308 unsigned long len, unsigned long pgoff, 1309 unsigned long flags) 1310 { 1311 unsigned long limit; 1312 1313 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1314 if (current->personality & ADDR_LIMIT_32BIT) 1315 limit = 0x80000000; 1316 else 1317 limit = TASK_SIZE; 1318 1319 if (len > limit) 1320 return -ENOMEM; 1321 1322 if (flags & MAP_FIXED) 1323 return addr; 1324 1325 /* First, see if the given suggestion fits. 1326 1327 The OSF/1 loader (/sbin/loader) relies on us returning an 1328 address larger than the requested if one exists, which is 1329 a terribly broken way to program. 1330 1331 That said, I can see the use in being able to suggest not 1332 merely specific addresses, but regions of memory -- perhaps 1333 this feature should be incorporated into all ports? */ 1334 1335 if (addr) { 1336 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1337 if (addr != (unsigned long) -ENOMEM) 1338 return addr; 1339 } 1340 1341 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1342 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1343 len, limit); 1344 if (addr != (unsigned long) -ENOMEM) 1345 return addr; 1346 1347 /* Finally, try allocating in low memory. */ 1348 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1349 1350 return addr; 1351 } 1352 1353 #ifdef CONFIG_OSF4_COMPAT 1354 1355 /* Clear top 32 bits of iov_len in the user's buffer for 1356 compatibility with old versions of OSF/1 where iov_len 1357 was defined as int. */ 1358 static int 1359 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1360 { 1361 unsigned long i; 1362 1363 for (i = 0 ; i < count ; i++) { 1364 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1365 1366 if (put_user(0, iov_len_high)) 1367 return -EFAULT; 1368 } 1369 return 0; 1370 } 1371 1372 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1373 const struct iovec __user *, vector, unsigned long, count) 1374 { 1375 if (unlikely(personality(current->personality) == PER_OSF4)) 1376 if (osf_fix_iov_len(vector, count)) 1377 return -EFAULT; 1378 return sys_readv(fd, vector, count); 1379 } 1380 1381 SYSCALL_DEFINE3(osf_writev, 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_writev(fd, vector, count); 1388 } 1389 1390 #endif 1391 1392 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1393 { 1394 int prio = sys_getpriority(which, who); 1395 if (prio >= 0) { 1396 /* Return value is the unbiased priority, i.e. 20 - prio. 1397 This does result in negative return values, so signal 1398 no error */ 1399 force_successful_syscall_return(); 1400 prio = 20 - prio; 1401 } 1402 return prio; 1403 } 1404 1405 SYSCALL_DEFINE0(getxuid) 1406 { 1407 current_pt_regs()->r20 = sys_geteuid(); 1408 return sys_getuid(); 1409 } 1410 1411 SYSCALL_DEFINE0(getxgid) 1412 { 1413 current_pt_regs()->r20 = sys_getegid(); 1414 return sys_getgid(); 1415 } 1416 1417 SYSCALL_DEFINE0(getxpid) 1418 { 1419 current_pt_regs()->r20 = sys_getppid(); 1420 return sys_getpid(); 1421 } 1422 1423 SYSCALL_DEFINE0(alpha_pipe) 1424 { 1425 int fd[2]; 1426 int res = do_pipe_flags(fd, 0); 1427 if (!res) { 1428 /* The return values are in $0 and $20. */ 1429 current_pt_regs()->r20 = fd[1]; 1430 res = fd[0]; 1431 } 1432 return res; 1433 } 1434 1435 SYSCALL_DEFINE1(sethae, unsigned long, val) 1436 { 1437 current_pt_regs()->hae = val; 1438 return 0; 1439 } 1440