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