1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/arch/alpha/kernel/osf_sys.c 4 * 5 * Copyright (C) 1995 Linus Torvalds 6 */ 7 8 /* 9 * This file handles some of the stranger OSF/1 system call interfaces. 10 * Some of the system calls expect a non-C calling standard, others have 11 * special parameter blocks.. 12 */ 13 14 #include <linux/errno.h> 15 #include <linux/sched/signal.h> 16 #include <linux/sched/mm.h> 17 #include <linux/sched/task_stack.h> 18 #include <linux/sched/cputime.h> 19 #include <linux/kernel.h> 20 #include <linux/mm.h> 21 #include <linux/smp.h> 22 #include <linux/stddef.h> 23 #include <linux/syscalls.h> 24 #include <linux/unistd.h> 25 #include <linux/ptrace.h> 26 #include <linux/user.h> 27 #include <linux/utsname.h> 28 #include <linux/time.h> 29 #include <linux/timex.h> 30 #include <linux/major.h> 31 #include <linux/stat.h> 32 #include <linux/mman.h> 33 #include <linux/shm.h> 34 #include <linux/poll.h> 35 #include <linux/file.h> 36 #include <linux/types.h> 37 #include <linux/ipc.h> 38 #include <linux/namei.h> 39 #include <linux/uio.h> 40 #include <linux/vfs.h> 41 #include <linux/rcupdate.h> 42 #include <linux/slab.h> 43 44 #include <asm/fpu.h> 45 #include <asm/io.h> 46 #include <linux/uaccess.h> 47 #include <asm/sysinfo.h> 48 #include <asm/thread_info.h> 49 #include <asm/hwrpb.h> 50 #include <asm/processor.h> 51 52 /* 53 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 54 * which OSF programs just shouldn't be doing. We're still not quite 55 * identical to OSF as we don't return 0 on success, but doing otherwise 56 * would require changes to libc. Hopefully this is good enough. 57 */ 58 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 59 { 60 unsigned long retval = sys_brk(brk); 61 if (brk && brk != retval) 62 retval = -ENOMEM; 63 return retval; 64 } 65 66 /* 67 * This is pure guess-work.. 68 */ 69 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 70 unsigned long, text_len, unsigned long, bss_start, 71 unsigned long, bss_len) 72 { 73 struct mm_struct *mm; 74 75 mm = current->mm; 76 mm->end_code = bss_start + bss_len; 77 mm->start_brk = bss_start + bss_len; 78 mm->brk = bss_start + bss_len; 79 #if 0 80 printk("set_program_attributes(%lx %lx %lx %lx)\n", 81 text_start, text_len, bss_start, bss_len); 82 #endif 83 return 0; 84 } 85 86 /* 87 * OSF/1 directory handling functions... 88 * 89 * The "getdents()" interface is much more sane: the "basep" stuff is 90 * braindamage (it can't really handle filesystems where the directory 91 * offset differences aren't the same as "d_reclen"). 92 */ 93 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 94 95 struct osf_dirent { 96 unsigned int d_ino; 97 unsigned short d_reclen; 98 unsigned short d_namlen; 99 char d_name[1]; 100 }; 101 102 struct osf_dirent_callback { 103 struct dir_context ctx; 104 struct osf_dirent __user *dirent; 105 long __user *basep; 106 unsigned int count; 107 int error; 108 }; 109 110 static int 111 osf_filldir(struct dir_context *ctx, const char *name, int namlen, 112 loff_t offset, u64 ino, unsigned int d_type) 113 { 114 struct osf_dirent __user *dirent; 115 struct osf_dirent_callback *buf = 116 container_of(ctx, struct osf_dirent_callback, ctx); 117 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 118 unsigned int d_ino; 119 120 buf->error = -EINVAL; /* only used if we fail */ 121 if (reclen > buf->count) 122 return -EINVAL; 123 d_ino = ino; 124 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 125 buf->error = -EOVERFLOW; 126 return -EOVERFLOW; 127 } 128 if (buf->basep) { 129 if (put_user(offset, buf->basep)) 130 goto Efault; 131 buf->basep = NULL; 132 } 133 dirent = buf->dirent; 134 if (put_user(d_ino, &dirent->d_ino) || 135 put_user(namlen, &dirent->d_namlen) || 136 put_user(reclen, &dirent->d_reclen) || 137 copy_to_user(dirent->d_name, name, namlen) || 138 put_user(0, dirent->d_name + namlen)) 139 goto Efault; 140 dirent = (void __user *)dirent + reclen; 141 buf->dirent = dirent; 142 buf->count -= reclen; 143 return 0; 144 Efault: 145 buf->error = -EFAULT; 146 return -EFAULT; 147 } 148 149 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 150 struct osf_dirent __user *, dirent, unsigned int, count, 151 long __user *, basep) 152 { 153 int error; 154 struct fd arg = fdget_pos(fd); 155 struct osf_dirent_callback buf = { 156 .ctx.actor = osf_filldir, 157 .dirent = dirent, 158 .basep = basep, 159 .count = count 160 }; 161 162 if (!arg.file) 163 return -EBADF; 164 165 error = iterate_dir(arg.file, &buf.ctx); 166 if (error >= 0) 167 error = buf.error; 168 if (count != buf.count) 169 error = count - buf.count; 170 171 fdput_pos(arg); 172 return error; 173 } 174 175 #undef NAME_OFFSET 176 177 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 178 unsigned long, prot, unsigned long, flags, unsigned long, fd, 179 unsigned long, off) 180 { 181 unsigned long ret = -EINVAL; 182 183 #if 0 184 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 185 printk("%s: unimplemented OSF mmap flags %04lx\n", 186 current->comm, flags); 187 #endif 188 if ((off + PAGE_ALIGN(len)) < off) 189 goto out; 190 if (off & ~PAGE_MASK) 191 goto out; 192 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 193 out: 194 return ret; 195 } 196 197 struct osf_stat { 198 int st_dev; 199 int st_pad1; 200 unsigned st_mode; 201 unsigned short st_nlink; 202 short st_nlink_reserved; 203 unsigned st_uid; 204 unsigned st_gid; 205 int st_rdev; 206 int st_ldev; 207 long st_size; 208 int st_pad2; 209 int st_uatime; 210 int st_pad3; 211 int st_umtime; 212 int st_pad4; 213 int st_uctime; 214 int st_pad5; 215 int st_pad6; 216 unsigned st_flags; 217 unsigned st_gen; 218 long st_spare[4]; 219 unsigned st_ino; 220 int st_ino_reserved; 221 int st_atime; 222 int st_atime_reserved; 223 int st_mtime; 224 int st_mtime_reserved; 225 int st_ctime; 226 int st_ctime_reserved; 227 long st_blksize; 228 long st_blocks; 229 }; 230 231 /* 232 * The OSF/1 statfs structure is much larger, but this should 233 * match the beginning, at least. 234 */ 235 struct osf_statfs { 236 short f_type; 237 short f_flags; 238 int f_fsize; 239 int f_bsize; 240 int f_blocks; 241 int f_bfree; 242 int f_bavail; 243 int f_files; 244 int f_ffree; 245 __kernel_fsid_t f_fsid; 246 }; 247 248 struct osf_statfs64 { 249 short f_type; 250 short f_flags; 251 int f_pad1; 252 int f_pad2; 253 int f_pad3; 254 int f_pad4; 255 int f_pad5; 256 int f_pad6; 257 int f_pad7; 258 __kernel_fsid_t f_fsid; 259 u_short f_namemax; 260 short f_reserved1; 261 int f_spare[8]; 262 char f_pad8[90]; 263 char f_pad9[90]; 264 long mount_info[10]; 265 u_long f_flags2; 266 long f_spare2[14]; 267 long f_fsize; 268 long f_bsize; 269 long f_blocks; 270 long f_bfree; 271 long f_bavail; 272 long f_files; 273 long f_ffree; 274 }; 275 276 static int 277 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat) 278 { 279 struct osf_stat tmp = { 0 }; 280 281 tmp.st_dev = lstat->dev; 282 tmp.st_mode = lstat->mode; 283 tmp.st_nlink = lstat->nlink; 284 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid); 285 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid); 286 tmp.st_rdev = lstat->rdev; 287 tmp.st_ldev = lstat->rdev; 288 tmp.st_size = lstat->size; 289 tmp.st_uatime = lstat->atime.tv_nsec / 1000; 290 tmp.st_umtime = lstat->mtime.tv_nsec / 1000; 291 tmp.st_uctime = lstat->ctime.tv_nsec / 1000; 292 tmp.st_ino = lstat->ino; 293 tmp.st_atime = lstat->atime.tv_sec; 294 tmp.st_mtime = lstat->mtime.tv_sec; 295 tmp.st_ctime = lstat->ctime.tv_sec; 296 tmp.st_blksize = lstat->blksize; 297 tmp.st_blocks = lstat->blocks; 298 299 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0; 300 } 301 302 static int 303 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 304 unsigned long bufsiz) 305 { 306 struct osf_statfs tmp_stat; 307 308 tmp_stat.f_type = linux_stat->f_type; 309 tmp_stat.f_flags = 0; /* mount flags */ 310 tmp_stat.f_fsize = linux_stat->f_frsize; 311 tmp_stat.f_bsize = linux_stat->f_bsize; 312 tmp_stat.f_blocks = linux_stat->f_blocks; 313 tmp_stat.f_bfree = linux_stat->f_bfree; 314 tmp_stat.f_bavail = linux_stat->f_bavail; 315 tmp_stat.f_files = linux_stat->f_files; 316 tmp_stat.f_ffree = linux_stat->f_ffree; 317 tmp_stat.f_fsid = linux_stat->f_fsid; 318 if (bufsiz > sizeof(tmp_stat)) 319 bufsiz = sizeof(tmp_stat); 320 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 321 } 322 323 static int 324 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat, 325 unsigned long bufsiz) 326 { 327 struct osf_statfs64 tmp_stat = { 0 }; 328 329 tmp_stat.f_type = linux_stat->f_type; 330 tmp_stat.f_fsize = linux_stat->f_frsize; 331 tmp_stat.f_bsize = linux_stat->f_bsize; 332 tmp_stat.f_blocks = linux_stat->f_blocks; 333 tmp_stat.f_bfree = linux_stat->f_bfree; 334 tmp_stat.f_bavail = linux_stat->f_bavail; 335 tmp_stat.f_files = linux_stat->f_files; 336 tmp_stat.f_ffree = linux_stat->f_ffree; 337 tmp_stat.f_fsid = linux_stat->f_fsid; 338 if (bufsiz > sizeof(tmp_stat)) 339 bufsiz = sizeof(tmp_stat); 340 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 341 } 342 343 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 344 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 345 { 346 struct kstatfs linux_stat; 347 int error = user_statfs(pathname, &linux_stat); 348 if (!error) 349 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 350 return error; 351 } 352 353 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf) 354 { 355 struct kstat stat; 356 int error; 357 358 error = vfs_stat(name, &stat); 359 if (error) 360 return error; 361 362 return linux_to_osf_stat(&stat, buf); 363 } 364 365 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf) 366 { 367 struct kstat stat; 368 int error; 369 370 error = vfs_lstat(name, &stat); 371 if (error) 372 return error; 373 374 return linux_to_osf_stat(&stat, buf); 375 } 376 377 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf) 378 { 379 struct kstat stat; 380 int error; 381 382 error = vfs_fstat(fd, &stat); 383 if (error) 384 return error; 385 386 return linux_to_osf_stat(&stat, buf); 387 } 388 389 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 390 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 391 { 392 struct kstatfs linux_stat; 393 int error = fd_statfs(fd, &linux_stat); 394 if (!error) 395 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 396 return error; 397 } 398 399 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname, 400 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 401 { 402 struct kstatfs linux_stat; 403 int error = user_statfs(pathname, &linux_stat); 404 if (!error) 405 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 406 return error; 407 } 408 409 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd, 410 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz) 411 { 412 struct kstatfs linux_stat; 413 int error = fd_statfs(fd, &linux_stat); 414 if (!error) 415 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz); 416 return error; 417 } 418 419 /* 420 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 421 * 422 * Although to be frank, neither are the native Linux/i386 ones.. 423 */ 424 struct ufs_args { 425 char __user *devname; 426 int flags; 427 uid_t exroot; 428 }; 429 430 struct cdfs_args { 431 char __user *devname; 432 int flags; 433 uid_t exroot; 434 435 /* This has lots more here, which Linux handles with the option block 436 but I'm too lazy to do the translation into ASCII. */ 437 }; 438 439 struct procfs_args { 440 char __user *devname; 441 int flags; 442 uid_t exroot; 443 }; 444 445 /* 446 * We can't actually handle ufs yet, so we translate UFS mounts to 447 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 448 * layout is so braindead it's a major headache doing it. 449 * 450 * Just how long ago was it written? OTOH our UFS driver may be still 451 * unhappy with OSF UFS. [CHECKME] 452 */ 453 static int 454 osf_ufs_mount(const char __user *dirname, 455 struct ufs_args __user *args, int flags) 456 { 457 int retval; 458 struct cdfs_args tmp; 459 struct filename *devname; 460 461 retval = -EFAULT; 462 if (copy_from_user(&tmp, args, sizeof(tmp))) 463 goto out; 464 devname = getname(tmp.devname); 465 retval = PTR_ERR(devname); 466 if (IS_ERR(devname)) 467 goto out; 468 retval = do_mount(devname->name, dirname, "ext2", flags, NULL); 469 putname(devname); 470 out: 471 return retval; 472 } 473 474 static int 475 osf_cdfs_mount(const char __user *dirname, 476 struct cdfs_args __user *args, int flags) 477 { 478 int retval; 479 struct cdfs_args tmp; 480 struct filename *devname; 481 482 retval = -EFAULT; 483 if (copy_from_user(&tmp, args, sizeof(tmp))) 484 goto out; 485 devname = getname(tmp.devname); 486 retval = PTR_ERR(devname); 487 if (IS_ERR(devname)) 488 goto out; 489 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); 490 putname(devname); 491 out: 492 return retval; 493 } 494 495 static int 496 osf_procfs_mount(const char __user *dirname, 497 struct procfs_args __user *args, int flags) 498 { 499 struct procfs_args tmp; 500 501 if (copy_from_user(&tmp, args, sizeof(tmp))) 502 return -EFAULT; 503 504 return do_mount("", dirname, "proc", flags, NULL); 505 } 506 507 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 508 int, flag, void __user *, data) 509 { 510 int retval; 511 512 switch (typenr) { 513 case 1: 514 retval = osf_ufs_mount(path, data, flag); 515 break; 516 case 6: 517 retval = osf_cdfs_mount(path, data, flag); 518 break; 519 case 9: 520 retval = osf_procfs_mount(path, data, flag); 521 break; 522 default: 523 retval = -EINVAL; 524 printk("osf_mount(%ld, %x)\n", typenr, flag); 525 } 526 527 return retval; 528 } 529 530 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 531 { 532 int error; 533 534 down_read(&uts_sem); 535 error = -EFAULT; 536 if (copy_to_user(name + 0, utsname()->sysname, 32)) 537 goto out; 538 if (copy_to_user(name + 32, utsname()->nodename, 32)) 539 goto out; 540 if (copy_to_user(name + 64, utsname()->release, 32)) 541 goto out; 542 if (copy_to_user(name + 96, utsname()->version, 32)) 543 goto out; 544 if (copy_to_user(name + 128, utsname()->machine, 32)) 545 goto out; 546 547 error = 0; 548 out: 549 up_read(&uts_sem); 550 return error; 551 } 552 553 SYSCALL_DEFINE0(getpagesize) 554 { 555 return PAGE_SIZE; 556 } 557 558 SYSCALL_DEFINE0(getdtablesize) 559 { 560 return sysctl_nr_open; 561 } 562 563 /* 564 * For compatibility with OSF/1 only. Use utsname(2) instead. 565 */ 566 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 567 { 568 int len, err = 0; 569 char *kname; 570 571 if (namelen > 32) 572 namelen = 32; 573 574 down_read(&uts_sem); 575 kname = utsname()->domainname; 576 len = strnlen(kname, namelen); 577 if (copy_to_user(name, kname, min(len + 1, namelen))) 578 err = -EFAULT; 579 up_read(&uts_sem); 580 581 return err; 582 } 583 584 /* 585 * The following stuff should move into a header file should it ever 586 * be labeled "officially supported." Right now, there is just enough 587 * support to avoid applications (such as tar) printing error 588 * messages. The attributes are not really implemented. 589 */ 590 591 /* 592 * Values for Property list entry flag 593 */ 594 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 595 by default */ 596 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 597 #define PLE_FLAG_ALL -1 /* All flag value */ 598 599 struct proplistname_args { 600 unsigned int pl_mask; 601 unsigned int pl_numnames; 602 char **pl_names; 603 }; 604 605 union pl_args { 606 struct setargs { 607 char __user *path; 608 long follow; 609 long nbytes; 610 char __user *buf; 611 } set; 612 struct fsetargs { 613 long fd; 614 long nbytes; 615 char __user *buf; 616 } fset; 617 struct getargs { 618 char __user *path; 619 long follow; 620 struct proplistname_args __user *name_args; 621 long nbytes; 622 char __user *buf; 623 int __user *min_buf_size; 624 } get; 625 struct fgetargs { 626 long fd; 627 struct proplistname_args __user *name_args; 628 long nbytes; 629 char __user *buf; 630 int __user *min_buf_size; 631 } fget; 632 struct delargs { 633 char __user *path; 634 long follow; 635 struct proplistname_args __user *name_args; 636 } del; 637 struct fdelargs { 638 long fd; 639 struct proplistname_args __user *name_args; 640 } fdel; 641 }; 642 643 enum pl_code { 644 PL_SET = 1, PL_FSET = 2, 645 PL_GET = 3, PL_FGET = 4, 646 PL_DEL = 5, PL_FDEL = 6 647 }; 648 649 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 650 union pl_args __user *, args) 651 { 652 long error; 653 int __user *min_buf_size_ptr; 654 655 switch (code) { 656 case PL_SET: 657 if (get_user(error, &args->set.nbytes)) 658 error = -EFAULT; 659 break; 660 case PL_FSET: 661 if (get_user(error, &args->fset.nbytes)) 662 error = -EFAULT; 663 break; 664 case PL_GET: 665 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 666 if (error) 667 break; 668 error = put_user(0, min_buf_size_ptr); 669 break; 670 case PL_FGET: 671 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 672 if (error) 673 break; 674 error = put_user(0, min_buf_size_ptr); 675 break; 676 case PL_DEL: 677 case PL_FDEL: 678 error = 0; 679 break; 680 default: 681 error = -EOPNOTSUPP; 682 break; 683 }; 684 return error; 685 } 686 687 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 688 struct sigstack __user *, uoss) 689 { 690 unsigned long usp = rdusp(); 691 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 692 unsigned long oss_os = on_sig_stack(usp); 693 int error; 694 695 if (uss) { 696 void __user *ss_sp; 697 698 error = -EFAULT; 699 if (get_user(ss_sp, &uss->ss_sp)) 700 goto out; 701 702 /* If the current stack was set with sigaltstack, don't 703 swap stacks while we are on it. */ 704 error = -EPERM; 705 if (current->sas_ss_sp && on_sig_stack(usp)) 706 goto out; 707 708 /* Since we don't know the extent of the stack, and we don't 709 track onstack-ness, but rather calculate it, we must 710 presume a size. Ho hum this interface is lossy. */ 711 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 712 current->sas_ss_size = SIGSTKSZ; 713 } 714 715 if (uoss) { 716 error = -EFAULT; 717 if (put_user(oss_sp, &uoss->ss_sp) || 718 put_user(oss_os, &uoss->ss_onstack)) 719 goto out; 720 } 721 722 error = 0; 723 out: 724 return error; 725 } 726 727 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 728 { 729 const char *sysinfo_table[] = { 730 utsname()->sysname, 731 utsname()->nodename, 732 utsname()->release, 733 utsname()->version, 734 utsname()->machine, 735 "alpha", /* instruction set architecture */ 736 "dummy", /* hardware serial number */ 737 "dummy", /* hardware manufacturer */ 738 "dummy", /* secure RPC domain */ 739 }; 740 unsigned long offset; 741 const char *res; 742 long len, err = -EINVAL; 743 744 offset = command-1; 745 if (offset >= ARRAY_SIZE(sysinfo_table)) { 746 /* Digital UNIX has a few unpublished interfaces here */ 747 printk("sysinfo(%d)", command); 748 goto out; 749 } 750 751 down_read(&uts_sem); 752 res = sysinfo_table[offset]; 753 len = strlen(res)+1; 754 if ((unsigned long)len > (unsigned long)count) 755 len = count; 756 if (copy_to_user(buf, res, len)) 757 err = -EFAULT; 758 else 759 err = 0; 760 up_read(&uts_sem); 761 out: 762 return err; 763 } 764 765 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 766 unsigned long, nbytes, int __user *, start, void __user *, arg) 767 { 768 unsigned long w; 769 struct percpu_struct *cpu; 770 771 switch (op) { 772 case GSI_IEEE_FP_CONTROL: 773 /* Return current software fp control & status bits. */ 774 /* Note that DU doesn't verify available space here. */ 775 776 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 777 w = swcr_update_status(w, rdfpcr()); 778 if (put_user(w, (unsigned long __user *) buffer)) 779 return -EFAULT; 780 return 0; 781 782 case GSI_IEEE_STATE_AT_SIGNAL: 783 /* 784 * Not sure anybody will ever use this weird stuff. These 785 * ops can be used (under OSF/1) to set the fpcr that should 786 * be used when a signal handler starts executing. 787 */ 788 break; 789 790 case GSI_UACPROC: 791 if (nbytes < sizeof(unsigned int)) 792 return -EINVAL; 793 w = current_thread_info()->status & UAC_BITMASK; 794 if (put_user(w, (unsigned int __user *)buffer)) 795 return -EFAULT; 796 return 1; 797 798 case GSI_PROC_TYPE: 799 if (nbytes < sizeof(unsigned long)) 800 return -EINVAL; 801 cpu = (struct percpu_struct*) 802 ((char*)hwrpb + hwrpb->processor_offset); 803 w = cpu->type; 804 if (put_user(w, (unsigned long __user*)buffer)) 805 return -EFAULT; 806 return 1; 807 808 case GSI_GET_HWRPB: 809 if (nbytes > sizeof(*hwrpb)) 810 return -EINVAL; 811 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 812 return -EFAULT; 813 return 1; 814 815 default: 816 break; 817 } 818 819 return -EOPNOTSUPP; 820 } 821 822 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 823 unsigned long, nbytes, int __user *, start, void __user *, arg) 824 { 825 switch (op) { 826 case SSI_IEEE_FP_CONTROL: { 827 unsigned long swcr, fpcr; 828 unsigned int *state; 829 830 /* 831 * Alpha Architecture Handbook 4.7.7.3: 832 * To be fully IEEE compiant, we must track the current IEEE 833 * exception state in software, because spurious bits can be 834 * set in the trap shadow of a software-complete insn. 835 */ 836 837 if (get_user(swcr, (unsigned long __user *)buffer)) 838 return -EFAULT; 839 state = ¤t_thread_info()->ieee_state; 840 841 /* Update softare trap enable bits. */ 842 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 843 844 /* Update the real fpcr. */ 845 fpcr = rdfpcr() & FPCR_DYN_MASK; 846 fpcr |= ieee_swcr_to_fpcr(swcr); 847 wrfpcr(fpcr); 848 849 return 0; 850 } 851 852 case SSI_IEEE_RAISE_EXCEPTION: { 853 unsigned long exc, swcr, fpcr, fex; 854 unsigned int *state; 855 856 if (get_user(exc, (unsigned long __user *)buffer)) 857 return -EFAULT; 858 state = ¤t_thread_info()->ieee_state; 859 exc &= IEEE_STATUS_MASK; 860 861 /* Update softare trap enable bits. */ 862 swcr = (*state & IEEE_SW_MASK) | exc; 863 *state |= exc; 864 865 /* Update the real fpcr. */ 866 fpcr = rdfpcr(); 867 fpcr |= ieee_swcr_to_fpcr(swcr); 868 wrfpcr(fpcr); 869 870 /* If any exceptions set by this call, and are unmasked, 871 send a signal. Old exceptions are not signaled. */ 872 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 873 if (fex) { 874 siginfo_t info; 875 int si_code = 0; 876 877 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 878 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 879 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 880 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 881 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 882 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 883 884 info.si_signo = SIGFPE; 885 info.si_errno = 0; 886 info.si_code = si_code; 887 info.si_addr = NULL; /* FIXME */ 888 send_sig_info(SIGFPE, &info, current); 889 } 890 return 0; 891 } 892 893 case SSI_IEEE_STATE_AT_SIGNAL: 894 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 895 /* 896 * Not sure anybody will ever use this weird stuff. These 897 * ops can be used (under OSF/1) to set the fpcr that should 898 * be used when a signal handler starts executing. 899 */ 900 break; 901 902 case SSI_NVPAIRS: { 903 unsigned __user *p = buffer; 904 unsigned i; 905 906 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 907 unsigned v, w, status; 908 909 if (get_user(v, p) || get_user(w, p + 1)) 910 return -EFAULT; 911 switch (v) { 912 case SSIN_UACPROC: 913 w &= UAC_BITMASK; 914 status = current_thread_info()->status; 915 status = (status & ~UAC_BITMASK) | w; 916 current_thread_info()->status = status; 917 break; 918 919 default: 920 return -EOPNOTSUPP; 921 } 922 } 923 return 0; 924 } 925 926 case SSI_LMF: 927 return 0; 928 929 default: 930 break; 931 } 932 933 return -EOPNOTSUPP; 934 } 935 936 /* Translations due to the fact that OSF's time_t is an int. Which 937 affects all sorts of things, like timeval and itimerval. */ 938 939 extern struct timezone sys_tz; 940 941 struct timeval32 942 { 943 int tv_sec, tv_usec; 944 }; 945 946 struct itimerval32 947 { 948 struct timeval32 it_interval; 949 struct timeval32 it_value; 950 }; 951 952 static inline long 953 get_tv32(struct timespec64 *o, struct timeval32 __user *i) 954 { 955 struct timeval32 tv; 956 if (copy_from_user(&tv, i, sizeof(struct timeval32))) 957 return -EFAULT; 958 o->tv_sec = tv.tv_sec; 959 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC; 960 return 0; 961 } 962 963 static inline long 964 put_tv32(struct timeval32 __user *o, struct timespec64 *i) 965 { 966 return copy_to_user(o, &(struct timeval32){ 967 .tv_sec = i->tv_sec, 968 .tv_usec = i->tv_nsec / NSEC_PER_USEC}, 969 sizeof(struct timeval32)); 970 } 971 972 static inline long 973 put_tv_to_tv32(struct timeval32 __user *o, struct timeval *i) 974 { 975 return copy_to_user(o, &(struct timeval32){ 976 .tv_sec = i->tv_sec, 977 .tv_usec = i->tv_usec}, 978 sizeof(struct timeval32)); 979 } 980 981 static inline long 982 get_it32(struct itimerval *o, struct itimerval32 __user *i) 983 { 984 struct itimerval32 itv; 985 if (copy_from_user(&itv, i, sizeof(struct itimerval32))) 986 return -EFAULT; 987 o->it_interval.tv_sec = itv.it_interval.tv_sec; 988 o->it_interval.tv_usec = itv.it_interval.tv_usec; 989 o->it_value.tv_sec = itv.it_value.tv_sec; 990 o->it_value.tv_usec = itv.it_value.tv_usec; 991 return 0; 992 } 993 994 static inline long 995 put_it32(struct itimerval32 __user *o, struct itimerval *i) 996 { 997 return copy_to_user(o, &(struct itimerval32){ 998 .it_interval.tv_sec = o->it_interval.tv_sec, 999 .it_interval.tv_usec = o->it_interval.tv_usec, 1000 .it_value.tv_sec = o->it_value.tv_sec, 1001 .it_value.tv_usec = o->it_value.tv_usec}, 1002 sizeof(struct itimerval32)); 1003 } 1004 1005 static inline void 1006 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 1007 { 1008 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 1009 value->tv_sec = jiffies / HZ; 1010 } 1011 1012 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 1013 struct timezone __user *, tz) 1014 { 1015 if (tv) { 1016 struct timespec64 kts; 1017 1018 ktime_get_real_ts64(&kts); 1019 if (put_tv32(tv, &kts)) 1020 return -EFAULT; 1021 } 1022 if (tz) { 1023 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 1024 return -EFAULT; 1025 } 1026 return 0; 1027 } 1028 1029 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 1030 struct timezone __user *, tz) 1031 { 1032 struct timespec64 kts; 1033 struct timezone ktz; 1034 1035 if (tv) { 1036 if (get_tv32(&kts, tv)) 1037 return -EFAULT; 1038 } 1039 if (tz) { 1040 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1041 return -EFAULT; 1042 } 1043 1044 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL); 1045 } 1046 1047 asmlinkage long sys_ni_posix_timers(void); 1048 1049 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 1050 { 1051 struct itimerval kit; 1052 int error; 1053 1054 if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) 1055 return sys_ni_posix_timers(); 1056 1057 error = do_getitimer(which, &kit); 1058 if (!error && put_it32(it, &kit)) 1059 error = -EFAULT; 1060 1061 return error; 1062 } 1063 1064 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 1065 struct itimerval32 __user *, out) 1066 { 1067 struct itimerval kin, kout; 1068 int error; 1069 1070 if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) 1071 return sys_ni_posix_timers(); 1072 1073 if (in) { 1074 if (get_it32(&kin, in)) 1075 return -EFAULT; 1076 } else 1077 memset(&kin, 0, sizeof(kin)); 1078 1079 error = do_setitimer(which, &kin, out ? &kout : NULL); 1080 if (error || !out) 1081 return error; 1082 1083 if (put_it32(out, &kout)) 1084 return -EFAULT; 1085 1086 return 0; 1087 1088 } 1089 1090 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1091 struct timeval32 __user *, tvs) 1092 { 1093 struct timespec64 tv[2]; 1094 1095 if (tvs) { 1096 if (get_tv32(&tv[0], &tvs[0]) || 1097 get_tv32(&tv[1], &tvs[1])) 1098 return -EFAULT; 1099 1100 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || 1101 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) 1102 return -EINVAL; 1103 } 1104 1105 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1106 } 1107 1108 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1109 fd_set __user *, exp, struct timeval32 __user *, tvp) 1110 { 1111 struct timespec64 end_time, *to = NULL; 1112 if (tvp) { 1113 struct timespec64 tv; 1114 to = &end_time; 1115 1116 if (get_tv32(&tv, tvp)) 1117 return -EFAULT; 1118 1119 if (tv.tv_sec < 0 || tv.tv_nsec < 0) 1120 return -EINVAL; 1121 1122 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) 1123 return -EINVAL; 1124 1125 } 1126 1127 /* OSF does not copy back the remaining time. */ 1128 return core_sys_select(n, inp, outp, exp, to); 1129 } 1130 1131 struct rusage32 { 1132 struct timeval32 ru_utime; /* user time used */ 1133 struct timeval32 ru_stime; /* system time used */ 1134 long ru_maxrss; /* maximum resident set size */ 1135 long ru_ixrss; /* integral shared memory size */ 1136 long ru_idrss; /* integral unshared data size */ 1137 long ru_isrss; /* integral unshared stack size */ 1138 long ru_minflt; /* page reclaims */ 1139 long ru_majflt; /* page faults */ 1140 long ru_nswap; /* swaps */ 1141 long ru_inblock; /* block input operations */ 1142 long ru_oublock; /* block output operations */ 1143 long ru_msgsnd; /* messages sent */ 1144 long ru_msgrcv; /* messages received */ 1145 long ru_nsignals; /* signals received */ 1146 long ru_nvcsw; /* voluntary context switches */ 1147 long ru_nivcsw; /* involuntary " */ 1148 }; 1149 1150 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1151 { 1152 struct rusage32 r; 1153 u64 utime, stime; 1154 unsigned long utime_jiffies, stime_jiffies; 1155 1156 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1157 return -EINVAL; 1158 1159 memset(&r, 0, sizeof(r)); 1160 switch (who) { 1161 case RUSAGE_SELF: 1162 task_cputime(current, &utime, &stime); 1163 utime_jiffies = nsecs_to_jiffies(utime); 1164 stime_jiffies = nsecs_to_jiffies(stime); 1165 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1166 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1167 r.ru_minflt = current->min_flt; 1168 r.ru_majflt = current->maj_flt; 1169 break; 1170 case RUSAGE_CHILDREN: 1171 utime_jiffies = nsecs_to_jiffies(current->signal->cutime); 1172 stime_jiffies = nsecs_to_jiffies(current->signal->cstime); 1173 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1174 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1175 r.ru_minflt = current->signal->cmin_flt; 1176 r.ru_majflt = current->signal->cmaj_flt; 1177 break; 1178 } 1179 1180 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1181 } 1182 1183 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1184 struct rusage32 __user *, ur) 1185 { 1186 unsigned int status = 0; 1187 struct rusage r; 1188 long err = kernel_wait4(pid, &status, options, &r); 1189 if (err <= 0) 1190 return err; 1191 if (put_user(status, ustatus)) 1192 return -EFAULT; 1193 if (!ur) 1194 return err; 1195 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) 1196 return -EFAULT; 1197 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) 1198 return -EFAULT; 1199 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, 1200 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) 1201 return -EFAULT; 1202 return err; 1203 } 1204 1205 /* 1206 * I don't know what the parameters are: the first one 1207 * seems to be a timeval pointer, and I suspect the second 1208 * one is the time remaining.. Ho humm.. No documentation. 1209 */ 1210 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1211 struct timeval32 __user *, remain) 1212 { 1213 struct timespec64 tmp; 1214 unsigned long ticks; 1215 1216 if (get_tv32(&tmp, sleep)) 1217 goto fault; 1218 1219 ticks = timespec64_to_jiffies(&tmp); 1220 1221 ticks = schedule_timeout_interruptible(ticks); 1222 1223 if (remain) { 1224 jiffies_to_timespec64(ticks, &tmp); 1225 if (put_tv32(remain, &tmp)) 1226 goto fault; 1227 } 1228 1229 return 0; 1230 fault: 1231 return -EFAULT; 1232 } 1233 1234 1235 struct timex32 { 1236 unsigned int modes; /* mode selector */ 1237 long offset; /* time offset (usec) */ 1238 long freq; /* frequency offset (scaled ppm) */ 1239 long maxerror; /* maximum error (usec) */ 1240 long esterror; /* estimated error (usec) */ 1241 int status; /* clock command/status */ 1242 long constant; /* pll time constant */ 1243 long precision; /* clock precision (usec) (read only) */ 1244 long tolerance; /* clock frequency tolerance (ppm) 1245 * (read only) 1246 */ 1247 struct timeval32 time; /* (read only) */ 1248 long tick; /* (modified) usecs between clock ticks */ 1249 1250 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1251 long jitter; /* pps jitter (us) (ro) */ 1252 int shift; /* interval duration (s) (shift) (ro) */ 1253 long stabil; /* pps stability (scaled ppm) (ro) */ 1254 long jitcnt; /* jitter limit exceeded (ro) */ 1255 long calcnt; /* calibration intervals (ro) */ 1256 long errcnt; /* calibration errors (ro) */ 1257 long stbcnt; /* stability limit exceeded (ro) */ 1258 1259 int :32; int :32; int :32; int :32; 1260 int :32; int :32; int :32; int :32; 1261 int :32; int :32; int :32; int :32; 1262 }; 1263 1264 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1265 { 1266 struct timex txc; 1267 int ret; 1268 1269 /* copy relevant bits of struct timex. */ 1270 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1271 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1272 offsetof(struct timex32, tick))) 1273 return -EFAULT; 1274 1275 ret = do_adjtimex(&txc); 1276 if (ret < 0) 1277 return ret; 1278 1279 /* copy back to timex32 */ 1280 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1281 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1282 offsetof(struct timex32, tick))) || 1283 (put_tv_to_tv32(&txc_p->time, &txc.time))) 1284 return -EFAULT; 1285 1286 return ret; 1287 } 1288 1289 /* Get an address range which is currently unmapped. Similar to the 1290 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1291 1292 static unsigned long 1293 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1294 unsigned long limit) 1295 { 1296 struct vm_unmapped_area_info info; 1297 1298 info.flags = 0; 1299 info.length = len; 1300 info.low_limit = addr; 1301 info.high_limit = limit; 1302 info.align_mask = 0; 1303 info.align_offset = 0; 1304 return vm_unmapped_area(&info); 1305 } 1306 1307 unsigned long 1308 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1309 unsigned long len, unsigned long pgoff, 1310 unsigned long flags) 1311 { 1312 unsigned long limit; 1313 1314 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1315 if (current->personality & ADDR_LIMIT_32BIT) 1316 limit = 0x80000000; 1317 else 1318 limit = TASK_SIZE; 1319 1320 if (len > limit) 1321 return -ENOMEM; 1322 1323 if (flags & MAP_FIXED) 1324 return addr; 1325 1326 /* First, see if the given suggestion fits. 1327 1328 The OSF/1 loader (/sbin/loader) relies on us returning an 1329 address larger than the requested if one exists, which is 1330 a terribly broken way to program. 1331 1332 That said, I can see the use in being able to suggest not 1333 merely specific addresses, but regions of memory -- perhaps 1334 this feature should be incorporated into all ports? */ 1335 1336 if (addr) { 1337 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1338 if (addr != (unsigned long) -ENOMEM) 1339 return addr; 1340 } 1341 1342 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1343 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1344 len, limit); 1345 if (addr != (unsigned long) -ENOMEM) 1346 return addr; 1347 1348 /* Finally, try allocating in low memory. */ 1349 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1350 1351 return addr; 1352 } 1353 1354 #ifdef CONFIG_OSF4_COMPAT 1355 1356 /* Clear top 32 bits of iov_len in the user's buffer for 1357 compatibility with old versions of OSF/1 where iov_len 1358 was defined as int. */ 1359 static int 1360 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1361 { 1362 unsigned long i; 1363 1364 for (i = 0 ; i < count ; i++) { 1365 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1366 1367 if (put_user(0, iov_len_high)) 1368 return -EFAULT; 1369 } 1370 return 0; 1371 } 1372 1373 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1374 const struct iovec __user *, vector, unsigned long, count) 1375 { 1376 if (unlikely(personality(current->personality) == PER_OSF4)) 1377 if (osf_fix_iov_len(vector, count)) 1378 return -EFAULT; 1379 return sys_readv(fd, vector, count); 1380 } 1381 1382 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1383 const struct iovec __user *, vector, unsigned long, count) 1384 { 1385 if (unlikely(personality(current->personality) == PER_OSF4)) 1386 if (osf_fix_iov_len(vector, count)) 1387 return -EFAULT; 1388 return sys_writev(fd, vector, count); 1389 } 1390 1391 #endif 1392 1393 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1394 { 1395 int prio = sys_getpriority(which, who); 1396 if (prio >= 0) { 1397 /* Return value is the unbiased priority, i.e. 20 - prio. 1398 This does result in negative return values, so signal 1399 no error */ 1400 force_successful_syscall_return(); 1401 prio = 20 - prio; 1402 } 1403 return prio; 1404 } 1405 1406 SYSCALL_DEFINE0(getxuid) 1407 { 1408 current_pt_regs()->r20 = sys_geteuid(); 1409 return sys_getuid(); 1410 } 1411 1412 SYSCALL_DEFINE0(getxgid) 1413 { 1414 current_pt_regs()->r20 = sys_getegid(); 1415 return sys_getgid(); 1416 } 1417 1418 SYSCALL_DEFINE0(getxpid) 1419 { 1420 current_pt_regs()->r20 = sys_getppid(); 1421 return sys_getpid(); 1422 } 1423 1424 SYSCALL_DEFINE0(alpha_pipe) 1425 { 1426 int fd[2]; 1427 int res = do_pipe_flags(fd, 0); 1428 if (!res) { 1429 /* The return values are in $0 and $20. */ 1430 current_pt_regs()->r20 = fd[1]; 1431 res = fd[0]; 1432 } 1433 return res; 1434 } 1435 1436 SYSCALL_DEFINE1(sethae, unsigned long, val) 1437 { 1438 current_pt_regs()->hae = val; 1439 return 0; 1440 } 1441