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[]; 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 CLASS(fd_pos, arg)(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 (fd_empty(arg)) 164 return -EBADF; 165 166 error = iterate_dir(fd_file(arg), &buf.ctx); 167 if (error >= 0) 168 error = buf.error; 169 if (count != buf.count) 170 error = count - buf.count; 171 172 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 = ksys_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 struct ufs_args tmp; 458 char *devname __free(kfree) = NULL; 459 460 if (copy_from_user(&tmp, args, sizeof(tmp))) 461 return -EFAULT; 462 devname = strndup_user(tmp.devname, PATH_MAX); 463 if (IS_ERR(devname)) 464 return PTR_ERR(devname); 465 return do_mount(devname, dirname, "ext2", flags, NULL); 466 } 467 468 static int 469 osf_cdfs_mount(const char __user *dirname, 470 struct cdfs_args __user *args, int flags) 471 { 472 struct cdfs_args tmp; 473 char *devname __free(kfree) = NULL; 474 475 if (copy_from_user(&tmp, args, sizeof(tmp))) 476 return -EFAULT; 477 devname = strndup_user(tmp.devname, PATH_MAX); 478 if (IS_ERR(devname)) 479 return PTR_ERR(devname); 480 return do_mount(devname, dirname, "iso9660", flags, NULL); 481 } 482 483 static int 484 osf_procfs_mount(const char __user *dirname, 485 struct procfs_args __user *args, int flags) 486 { 487 struct procfs_args tmp; 488 489 if (copy_from_user(&tmp, args, sizeof(tmp))) 490 return -EFAULT; 491 492 return do_mount("", dirname, "proc", flags, NULL); 493 } 494 495 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 496 int, flag, void __user *, data) 497 { 498 int retval; 499 500 switch (typenr) { 501 case 1: 502 retval = osf_ufs_mount(path, data, flag); 503 break; 504 case 6: 505 retval = osf_cdfs_mount(path, data, flag); 506 break; 507 case 9: 508 retval = osf_procfs_mount(path, data, flag); 509 break; 510 default: 511 retval = -EINVAL; 512 printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag); 513 } 514 515 return retval; 516 } 517 518 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 519 { 520 char tmp[5 * 32]; 521 522 down_read(&uts_sem); 523 memcpy(tmp + 0 * 32, utsname()->sysname, 32); 524 memcpy(tmp + 1 * 32, utsname()->nodename, 32); 525 memcpy(tmp + 2 * 32, utsname()->release, 32); 526 memcpy(tmp + 3 * 32, utsname()->version, 32); 527 memcpy(tmp + 4 * 32, utsname()->machine, 32); 528 up_read(&uts_sem); 529 530 if (copy_to_user(name, tmp, sizeof(tmp))) 531 return -EFAULT; 532 return 0; 533 } 534 535 SYSCALL_DEFINE0(getpagesize) 536 { 537 return PAGE_SIZE; 538 } 539 540 SYSCALL_DEFINE0(getdtablesize) 541 { 542 return sysctl_nr_open; 543 } 544 545 /* 546 * For compatibility with OSF/1 only. Use utsname(2) instead. 547 */ 548 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 549 { 550 int len; 551 char *kname; 552 char tmp[32]; 553 554 if (namelen < 0 || namelen > 32) 555 namelen = 32; 556 557 down_read(&uts_sem); 558 kname = utsname()->domainname; 559 len = strnlen(kname, namelen); 560 len = min(len + 1, namelen); 561 memcpy(tmp, kname, len); 562 up_read(&uts_sem); 563 564 if (copy_to_user(name, tmp, len)) 565 return -EFAULT; 566 return 0; 567 } 568 569 /* 570 * The following stuff should move into a header file should it ever 571 * be labeled "officially supported." Right now, there is just enough 572 * support to avoid applications (such as tar) printing error 573 * messages. The attributes are not really implemented. 574 */ 575 576 /* 577 * Values for Property list entry flag 578 */ 579 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 580 by default */ 581 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 582 #define PLE_FLAG_ALL -1 /* All flag value */ 583 584 struct proplistname_args { 585 unsigned int pl_mask; 586 unsigned int pl_numnames; 587 char **pl_names; 588 }; 589 590 union pl_args { 591 struct setargs { 592 char __user *path; 593 long follow; 594 long nbytes; 595 char __user *buf; 596 } set; 597 struct fsetargs { 598 long fd; 599 long nbytes; 600 char __user *buf; 601 } fset; 602 struct getargs { 603 char __user *path; 604 long follow; 605 struct proplistname_args __user *name_args; 606 long nbytes; 607 char __user *buf; 608 int __user *min_buf_size; 609 } get; 610 struct fgetargs { 611 long fd; 612 struct proplistname_args __user *name_args; 613 long nbytes; 614 char __user *buf; 615 int __user *min_buf_size; 616 } fget; 617 struct delargs { 618 char __user *path; 619 long follow; 620 struct proplistname_args __user *name_args; 621 } del; 622 struct fdelargs { 623 long fd; 624 struct proplistname_args __user *name_args; 625 } fdel; 626 }; 627 628 enum pl_code { 629 PL_SET = 1, PL_FSET = 2, 630 PL_GET = 3, PL_FGET = 4, 631 PL_DEL = 5, PL_FDEL = 6 632 }; 633 634 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 635 union pl_args __user *, args) 636 { 637 long error; 638 int __user *min_buf_size_ptr; 639 640 switch (code) { 641 case PL_SET: 642 if (get_user(error, &args->set.nbytes)) 643 error = -EFAULT; 644 break; 645 case PL_FSET: 646 if (get_user(error, &args->fset.nbytes)) 647 error = -EFAULT; 648 break; 649 case PL_GET: 650 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 651 if (error) 652 break; 653 error = put_user(0, min_buf_size_ptr); 654 break; 655 case PL_FGET: 656 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 657 if (error) 658 break; 659 error = put_user(0, min_buf_size_ptr); 660 break; 661 case PL_DEL: 662 case PL_FDEL: 663 error = 0; 664 break; 665 default: 666 error = -EOPNOTSUPP; 667 break; 668 } 669 return error; 670 } 671 672 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 673 struct sigstack __user *, uoss) 674 { 675 unsigned long usp = rdusp(); 676 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 677 unsigned long oss_os = on_sig_stack(usp); 678 int error; 679 680 if (uss) { 681 void __user *ss_sp; 682 683 error = -EFAULT; 684 if (get_user(ss_sp, &uss->ss_sp)) 685 goto out; 686 687 /* If the current stack was set with sigaltstack, don't 688 swap stacks while we are on it. */ 689 error = -EPERM; 690 if (current->sas_ss_sp && on_sig_stack(usp)) 691 goto out; 692 693 /* Since we don't know the extent of the stack, and we don't 694 track onstack-ness, but rather calculate it, we must 695 presume a size. Ho hum this interface is lossy. */ 696 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 697 current->sas_ss_size = SIGSTKSZ; 698 } 699 700 if (uoss) { 701 error = -EFAULT; 702 if (put_user(oss_sp, &uoss->ss_sp) || 703 put_user(oss_os, &uoss->ss_onstack)) 704 goto out; 705 } 706 707 error = 0; 708 out: 709 return error; 710 } 711 712 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 713 { 714 const char *sysinfo_table[] = { 715 utsname()->sysname, 716 utsname()->nodename, 717 utsname()->release, 718 utsname()->version, 719 utsname()->machine, 720 "alpha", /* instruction set architecture */ 721 "dummy", /* hardware serial number */ 722 "dummy", /* hardware manufacturer */ 723 "dummy", /* secure RPC domain */ 724 }; 725 unsigned long offset; 726 const char *res; 727 long len; 728 char tmp[__NEW_UTS_LEN + 1]; 729 730 offset = command-1; 731 if (offset >= ARRAY_SIZE(sysinfo_table)) { 732 /* Digital UNIX has a few unpublished interfaces here */ 733 printk("sysinfo(%d)", command); 734 return -EINVAL; 735 } 736 737 down_read(&uts_sem); 738 res = sysinfo_table[offset]; 739 len = strlen(res)+1; 740 if ((unsigned long)len > (unsigned long)count) 741 len = count; 742 memcpy(tmp, res, len); 743 up_read(&uts_sem); 744 if (copy_to_user(buf, tmp, len)) 745 return -EFAULT; 746 return 0; 747 } 748 749 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 750 unsigned long, nbytes, int __user *, start, void __user *, arg) 751 { 752 unsigned long w; 753 struct percpu_struct *cpu; 754 755 switch (op) { 756 case GSI_IEEE_FP_CONTROL: 757 /* Return current software fp control & status bits. */ 758 /* Note that DU doesn't verify available space here. */ 759 760 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 761 w = swcr_update_status(w, rdfpcr()); 762 if (put_user(w, (unsigned long __user *) buffer)) 763 return -EFAULT; 764 return 0; 765 766 case GSI_IEEE_STATE_AT_SIGNAL: 767 /* 768 * Not sure anybody will ever use this weird stuff. These 769 * ops can be used (under OSF/1) to set the fpcr that should 770 * be used when a signal handler starts executing. 771 */ 772 break; 773 774 case GSI_UACPROC: 775 if (nbytes < sizeof(unsigned int)) 776 return -EINVAL; 777 w = current_thread_info()->status & UAC_BITMASK; 778 if (put_user(w, (unsigned int __user *)buffer)) 779 return -EFAULT; 780 return 1; 781 782 case GSI_PROC_TYPE: 783 if (nbytes < sizeof(unsigned long)) 784 return -EINVAL; 785 cpu = (struct percpu_struct*) 786 ((char*)hwrpb + hwrpb->processor_offset); 787 w = cpu->type; 788 if (put_user(w, (unsigned long __user*)buffer)) 789 return -EFAULT; 790 return 1; 791 792 case GSI_GET_HWRPB: 793 if (nbytes > sizeof(*hwrpb)) 794 return -EINVAL; 795 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 796 return -EFAULT; 797 return 1; 798 799 default: 800 break; 801 } 802 803 return -EOPNOTSUPP; 804 } 805 806 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 807 unsigned long, nbytes, int __user *, start, void __user *, arg) 808 { 809 switch (op) { 810 case SSI_IEEE_FP_CONTROL: { 811 unsigned long swcr, fpcr; 812 unsigned int *state; 813 814 /* 815 * Alpha Architecture Handbook 4.7.7.3: 816 * To be fully IEEE compiant, we must track the current IEEE 817 * exception state in software, because spurious bits can be 818 * set in the trap shadow of a software-complete insn. 819 */ 820 821 if (get_user(swcr, (unsigned long __user *)buffer)) 822 return -EFAULT; 823 state = ¤t_thread_info()->ieee_state; 824 825 /* Update software trap enable bits. */ 826 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 827 828 /* Update the real fpcr. */ 829 fpcr = rdfpcr() & FPCR_DYN_MASK; 830 fpcr |= ieee_swcr_to_fpcr(swcr); 831 wrfpcr(fpcr); 832 833 return 0; 834 } 835 836 case SSI_IEEE_RAISE_EXCEPTION: { 837 unsigned long exc, swcr, fpcr, fex; 838 unsigned int *state; 839 840 if (get_user(exc, (unsigned long __user *)buffer)) 841 return -EFAULT; 842 state = ¤t_thread_info()->ieee_state; 843 exc &= IEEE_STATUS_MASK; 844 845 /* Update software trap enable bits. */ 846 swcr = (*state & IEEE_SW_MASK) | exc; 847 *state |= exc; 848 849 /* Update the real fpcr. */ 850 fpcr = rdfpcr(); 851 fpcr |= ieee_swcr_to_fpcr(swcr); 852 wrfpcr(fpcr); 853 854 /* If any exceptions set by this call, and are unmasked, 855 send a signal. Old exceptions are not signaled. */ 856 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 857 if (fex) { 858 int si_code = FPE_FLTUNK; 859 860 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 861 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 862 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 863 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 864 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 865 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 866 867 send_sig_fault_trapno(SIGFPE, si_code, 868 (void __user *)NULL, /* FIXME */ 869 0, current); 870 } 871 return 0; 872 } 873 874 case SSI_IEEE_STATE_AT_SIGNAL: 875 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 876 /* 877 * Not sure anybody will ever use this weird stuff. These 878 * ops can be used (under OSF/1) to set the fpcr that should 879 * be used when a signal handler starts executing. 880 */ 881 break; 882 883 case SSI_NVPAIRS: { 884 unsigned __user *p = buffer; 885 unsigned i; 886 887 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 888 unsigned v, w, status; 889 890 if (get_user(v, p) || get_user(w, p + 1)) 891 return -EFAULT; 892 switch (v) { 893 case SSIN_UACPROC: 894 w &= UAC_BITMASK; 895 status = current_thread_info()->status; 896 status = (status & ~UAC_BITMASK) | w; 897 current_thread_info()->status = status; 898 break; 899 900 default: 901 return -EOPNOTSUPP; 902 } 903 } 904 return 0; 905 } 906 907 case SSI_LMF: 908 return 0; 909 910 default: 911 break; 912 } 913 914 return -EOPNOTSUPP; 915 } 916 917 /* Translations due to the fact that OSF's time_t is an int. Which 918 affects all sorts of things, like timeval and itimerval. */ 919 920 extern struct timezone sys_tz; 921 922 struct timeval32 923 { 924 int tv_sec, tv_usec; 925 }; 926 927 struct itimerval32 928 { 929 struct timeval32 it_interval; 930 struct timeval32 it_value; 931 }; 932 933 static inline long 934 get_tv32(struct timespec64 *o, struct timeval32 __user *i) 935 { 936 struct timeval32 tv; 937 if (copy_from_user(&tv, i, sizeof(struct timeval32))) 938 return -EFAULT; 939 o->tv_sec = tv.tv_sec; 940 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC; 941 return 0; 942 } 943 944 static inline long 945 put_tv32(struct timeval32 __user *o, struct timespec64 *i) 946 { 947 return copy_to_user(o, &(struct timeval32){ 948 .tv_sec = i->tv_sec, 949 .tv_usec = i->tv_nsec / NSEC_PER_USEC}, 950 sizeof(struct timeval32)); 951 } 952 953 static inline long 954 put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i) 955 { 956 return copy_to_user(o, &(struct timeval32){ 957 .tv_sec = i->tv_sec, 958 .tv_usec = i->tv_usec}, 959 sizeof(struct timeval32)); 960 } 961 962 static inline void 963 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 964 { 965 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 966 value->tv_sec = jiffies / HZ; 967 } 968 969 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 970 struct timezone __user *, tz) 971 { 972 if (tv) { 973 struct timespec64 kts; 974 975 ktime_get_real_ts64(&kts); 976 if (put_tv32(tv, &kts)) 977 return -EFAULT; 978 } 979 if (tz) { 980 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 981 return -EFAULT; 982 } 983 return 0; 984 } 985 986 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 987 struct timezone __user *, tz) 988 { 989 struct timespec64 kts; 990 struct timezone ktz; 991 992 if (tv) { 993 if (get_tv32(&kts, tv)) 994 return -EFAULT; 995 } 996 if (tz) { 997 if (copy_from_user(&ktz, tz, sizeof(*tz))) 998 return -EFAULT; 999 } 1000 1001 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL); 1002 } 1003 1004 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1005 struct timeval32 __user *, tvs) 1006 { 1007 struct timespec64 tv[2]; 1008 1009 if (tvs) { 1010 if (get_tv32(&tv[0], &tvs[0]) || 1011 get_tv32(&tv[1], &tvs[1])) 1012 return -EFAULT; 1013 1014 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || 1015 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) 1016 return -EINVAL; 1017 } 1018 1019 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1020 } 1021 1022 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1023 fd_set __user *, exp, struct timeval32 __user *, tvp) 1024 { 1025 struct timespec64 end_time, *to = NULL; 1026 if (tvp) { 1027 struct timespec64 tv; 1028 to = &end_time; 1029 1030 if (get_tv32(&tv, tvp)) 1031 return -EFAULT; 1032 1033 if (tv.tv_sec < 0 || tv.tv_nsec < 0) 1034 return -EINVAL; 1035 1036 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) 1037 return -EINVAL; 1038 1039 } 1040 1041 /* OSF does not copy back the remaining time. */ 1042 return core_sys_select(n, inp, outp, exp, to); 1043 } 1044 1045 struct rusage32 { 1046 struct timeval32 ru_utime; /* user time used */ 1047 struct timeval32 ru_stime; /* system time used */ 1048 long ru_maxrss; /* maximum resident set size */ 1049 long ru_ixrss; /* integral shared memory size */ 1050 long ru_idrss; /* integral unshared data size */ 1051 long ru_isrss; /* integral unshared stack size */ 1052 long ru_minflt; /* page reclaims */ 1053 long ru_majflt; /* page faults */ 1054 long ru_nswap; /* swaps */ 1055 long ru_inblock; /* block input operations */ 1056 long ru_oublock; /* block output operations */ 1057 long ru_msgsnd; /* messages sent */ 1058 long ru_msgrcv; /* messages received */ 1059 long ru_nsignals; /* signals received */ 1060 long ru_nvcsw; /* voluntary context switches */ 1061 long ru_nivcsw; /* involuntary " */ 1062 }; 1063 1064 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1065 { 1066 struct rusage32 r; 1067 u64 utime, stime; 1068 unsigned long utime_jiffies, stime_jiffies; 1069 1070 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1071 return -EINVAL; 1072 1073 memset(&r, 0, sizeof(r)); 1074 switch (who) { 1075 case RUSAGE_SELF: 1076 task_cputime(current, &utime, &stime); 1077 utime_jiffies = nsecs_to_jiffies(utime); 1078 stime_jiffies = nsecs_to_jiffies(stime); 1079 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1080 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1081 r.ru_minflt = current->min_flt; 1082 r.ru_majflt = current->maj_flt; 1083 break; 1084 case RUSAGE_CHILDREN: 1085 utime_jiffies = nsecs_to_jiffies(current->signal->cutime); 1086 stime_jiffies = nsecs_to_jiffies(current->signal->cstime); 1087 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1088 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1089 r.ru_minflt = current->signal->cmin_flt; 1090 r.ru_majflt = current->signal->cmaj_flt; 1091 break; 1092 } 1093 1094 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1095 } 1096 1097 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1098 struct rusage32 __user *, ur) 1099 { 1100 struct rusage r; 1101 long err = kernel_wait4(pid, ustatus, options, &r); 1102 if (err <= 0) 1103 return err; 1104 if (!ur) 1105 return err; 1106 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) 1107 return -EFAULT; 1108 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) 1109 return -EFAULT; 1110 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, 1111 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) 1112 return -EFAULT; 1113 return err; 1114 } 1115 1116 /* 1117 * I don't know what the parameters are: the first one 1118 * seems to be a timeval pointer, and I suspect the second 1119 * one is the time remaining.. Ho humm.. No documentation. 1120 */ 1121 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1122 struct timeval32 __user *, remain) 1123 { 1124 struct timespec64 tmp; 1125 unsigned long ticks; 1126 1127 if (get_tv32(&tmp, sleep)) 1128 goto fault; 1129 1130 ticks = timespec64_to_jiffies(&tmp); 1131 1132 ticks = schedule_timeout_interruptible(ticks); 1133 1134 if (remain) { 1135 jiffies_to_timespec64(ticks, &tmp); 1136 if (put_tv32(remain, &tmp)) 1137 goto fault; 1138 } 1139 1140 return 0; 1141 fault: 1142 return -EFAULT; 1143 } 1144 1145 1146 struct timex32 { 1147 unsigned int modes; /* mode selector */ 1148 long offset; /* time offset (usec) */ 1149 long freq; /* frequency offset (scaled ppm) */ 1150 long maxerror; /* maximum error (usec) */ 1151 long esterror; /* estimated error (usec) */ 1152 int status; /* clock command/status */ 1153 long constant; /* pll time constant */ 1154 long precision; /* clock precision (usec) (read only) */ 1155 long tolerance; /* clock frequency tolerance (ppm) 1156 * (read only) 1157 */ 1158 struct timeval32 time; /* (read only) */ 1159 long tick; /* (modified) usecs between clock ticks */ 1160 1161 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1162 long jitter; /* pps jitter (us) (ro) */ 1163 int shift; /* interval duration (s) (shift) (ro) */ 1164 long stabil; /* pps stability (scaled ppm) (ro) */ 1165 long jitcnt; /* jitter limit exceeded (ro) */ 1166 long calcnt; /* calibration intervals (ro) */ 1167 long errcnt; /* calibration errors (ro) */ 1168 long stbcnt; /* stability limit exceeded (ro) */ 1169 1170 int :32; int :32; int :32; int :32; 1171 int :32; int :32; int :32; int :32; 1172 int :32; int :32; int :32; int :32; 1173 }; 1174 1175 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1176 { 1177 struct __kernel_timex txc; 1178 int ret; 1179 1180 /* copy relevant bits of struct timex. */ 1181 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1182 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1183 offsetof(struct timex32, tick))) 1184 return -EFAULT; 1185 1186 ret = do_adjtimex(&txc); 1187 if (ret < 0) 1188 return ret; 1189 1190 /* copy back to timex32 */ 1191 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1192 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1193 offsetof(struct timex32, tick))) || 1194 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) || 1195 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec))) 1196 return -EFAULT; 1197 1198 return ret; 1199 } 1200 1201 /* Get an address range which is currently unmapped. */ 1202 1203 static unsigned long 1204 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1205 unsigned long limit) 1206 { 1207 struct vm_unmapped_area_info info = {}; 1208 1209 info.length = len; 1210 info.low_limit = addr; 1211 info.high_limit = limit; 1212 return vm_unmapped_area(&info); 1213 } 1214 1215 unsigned long 1216 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1217 unsigned long len, unsigned long pgoff, 1218 unsigned long flags, vm_flags_t vm_flags) 1219 { 1220 unsigned long limit = TASK_SIZE; 1221 1222 if (len > limit) 1223 return -ENOMEM; 1224 1225 if (flags & MAP_FIXED) 1226 return addr; 1227 1228 /* First, see if the given suggestion fits. 1229 1230 The OSF/1 loader (/sbin/loader) relies on us returning an 1231 address larger than the requested if one exists, which is 1232 a terribly broken way to program. 1233 1234 That said, I can see the use in being able to suggest not 1235 merely specific addresses, but regions of memory -- perhaps 1236 this feature should be incorporated into all ports? */ 1237 1238 if (addr) { 1239 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1240 if (addr != (unsigned long) -ENOMEM) 1241 return addr; 1242 } 1243 1244 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1245 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1246 len, limit); 1247 if (addr != (unsigned long) -ENOMEM) 1248 return addr; 1249 1250 /* Finally, try allocating in low memory. */ 1251 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1252 1253 return addr; 1254 } 1255 1256 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1257 { 1258 int prio = sys_getpriority(which, who); 1259 if (prio >= 0) { 1260 /* Return value is the unbiased priority, i.e. 20 - prio. 1261 This does result in negative return values, so signal 1262 no error */ 1263 force_successful_syscall_return(); 1264 prio = 20 - prio; 1265 } 1266 return prio; 1267 } 1268 1269 SYSCALL_DEFINE0(getxuid) 1270 { 1271 current_pt_regs()->r20 = sys_geteuid(); 1272 return sys_getuid(); 1273 } 1274 1275 SYSCALL_DEFINE0(getxgid) 1276 { 1277 current_pt_regs()->r20 = sys_getegid(); 1278 return sys_getgid(); 1279 } 1280 1281 SYSCALL_DEFINE0(getxpid) 1282 { 1283 current_pt_regs()->r20 = sys_getppid(); 1284 return sys_getpid(); 1285 } 1286 1287 SYSCALL_DEFINE0(alpha_pipe) 1288 { 1289 int fd[2]; 1290 int res = do_pipe_flags(fd, 0); 1291 if (!res) { 1292 /* The return values are in $0 and $20. */ 1293 current_pt_regs()->r20 = fd[1]; 1294 res = fd[0]; 1295 } 1296 return res; 1297 } 1298 1299 SYSCALL_DEFINE1(sethae, unsigned long, val) 1300 { 1301 current_pt_regs()->hae = val; 1302 return 0; 1303 } 1304