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/hugetlb.h> 42 #include <linux/vfs.h> 43 #include <linux/rcupdate.h> 44 #include <linux/slab.h> 45 46 #include <asm/fpu.h> 47 #include <asm/io.h> 48 #include <linux/uaccess.h> 49 #include <asm/sysinfo.h> 50 #include <asm/thread_info.h> 51 #include <asm/hwrpb.h> 52 #include <asm/processor.h> 53 54 /* 55 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 56 * which OSF programs just shouldn't be doing. We're still not quite 57 * identical to OSF as we don't return 0 on success, but doing otherwise 58 * would require changes to libc. Hopefully this is good enough. 59 */ 60 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 61 { 62 unsigned long retval = sys_brk(brk); 63 if (brk && brk != retval) 64 retval = -ENOMEM; 65 return retval; 66 } 67 68 /* 69 * This is pure guess-work.. 70 */ 71 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 72 unsigned long, text_len, unsigned long, bss_start, 73 unsigned long, bss_len) 74 { 75 struct mm_struct *mm; 76 77 mm = current->mm; 78 mm->end_code = bss_start + bss_len; 79 mm->start_brk = bss_start + bss_len; 80 mm->brk = bss_start + bss_len; 81 #if 0 82 printk("set_program_attributes(%lx %lx %lx %lx)\n", 83 text_start, text_len, bss_start, bss_len); 84 #endif 85 return 0; 86 } 87 88 /* 89 * OSF/1 directory handling functions... 90 * 91 * The "getdents()" interface is much more sane: the "basep" stuff is 92 * braindamage (it can't really handle filesystems where the directory 93 * offset differences aren't the same as "d_reclen"). 94 */ 95 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 96 97 struct osf_dirent { 98 unsigned int d_ino; 99 unsigned short d_reclen; 100 unsigned short d_namlen; 101 char d_name[]; 102 }; 103 104 struct osf_dirent_callback { 105 struct dir_context ctx; 106 struct osf_dirent __user *dirent; 107 long __user *basep; 108 unsigned int count; 109 int error; 110 }; 111 112 static bool 113 osf_filldir(struct dir_context *ctx, const char *name, int namlen, 114 loff_t offset, u64 ino, unsigned int d_type) 115 { 116 struct osf_dirent __user *dirent; 117 struct osf_dirent_callback *buf = 118 container_of(ctx, struct osf_dirent_callback, ctx); 119 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 120 unsigned int d_ino; 121 122 buf->error = -EINVAL; /* only used if we fail */ 123 if (reclen > buf->count) 124 return false; 125 d_ino = ino; 126 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 127 buf->error = -EOVERFLOW; 128 return false; 129 } 130 if (buf->basep) { 131 if (put_user(offset, buf->basep)) 132 goto Efault; 133 buf->basep = NULL; 134 } 135 dirent = buf->dirent; 136 if (put_user(d_ino, &dirent->d_ino) || 137 put_user(namlen, &dirent->d_namlen) || 138 put_user(reclen, &dirent->d_reclen) || 139 copy_to_user(dirent->d_name, name, namlen) || 140 put_user(0, dirent->d_name + namlen)) 141 goto Efault; 142 dirent = (void __user *)dirent + reclen; 143 buf->dirent = dirent; 144 buf->count -= reclen; 145 return true; 146 Efault: 147 buf->error = -EFAULT; 148 return false; 149 } 150 151 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 152 struct osf_dirent __user *, dirent, unsigned int, count, 153 long __user *, basep) 154 { 155 int error; 156 CLASS(fd_pos, arg)(fd); 157 struct osf_dirent_callback buf = { 158 .ctx.actor = osf_filldir, 159 .dirent = dirent, 160 .basep = basep, 161 .count = count 162 }; 163 164 if (fd_empty(arg)) 165 return -EBADF; 166 167 error = iterate_dir(fd_file(arg), &buf.ctx); 168 if (error >= 0) 169 error = buf.error; 170 if (count != buf.count) 171 error = count - buf.count; 172 173 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 struct ufs_args tmp; 459 char *devname __free(kfree) = NULL; 460 461 if (copy_from_user(&tmp, args, sizeof(tmp))) 462 return -EFAULT; 463 devname = strndup_user(tmp.devname, PATH_MAX); 464 if (IS_ERR(devname)) 465 return PTR_ERR(devname); 466 return do_mount(devname, dirname, "ext2", flags, NULL); 467 } 468 469 static int 470 osf_cdfs_mount(const char __user *dirname, 471 struct cdfs_args __user *args, int flags) 472 { 473 struct cdfs_args tmp; 474 char *devname __free(kfree) = NULL; 475 476 if (copy_from_user(&tmp, args, sizeof(tmp))) 477 return -EFAULT; 478 devname = strndup_user(tmp.devname, PATH_MAX); 479 if (IS_ERR(devname)) 480 return PTR_ERR(devname); 481 return do_mount(devname, dirname, "iso9660", flags, NULL); 482 } 483 484 static int 485 osf_procfs_mount(const char __user *dirname, 486 struct procfs_args __user *args, int flags) 487 { 488 struct procfs_args tmp; 489 490 if (copy_from_user(&tmp, args, sizeof(tmp))) 491 return -EFAULT; 492 493 return do_mount("", dirname, "proc", flags, NULL); 494 } 495 496 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 497 int, flag, void __user *, data) 498 { 499 int retval; 500 501 switch (typenr) { 502 case 1: 503 retval = osf_ufs_mount(path, data, flag); 504 break; 505 case 6: 506 retval = osf_cdfs_mount(path, data, flag); 507 break; 508 case 9: 509 retval = osf_procfs_mount(path, data, flag); 510 break; 511 default: 512 retval = -EINVAL; 513 printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag); 514 } 515 516 return retval; 517 } 518 519 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 520 { 521 char tmp[5 * 32]; 522 523 down_read(&uts_sem); 524 memcpy(tmp + 0 * 32, utsname()->sysname, 32); 525 memcpy(tmp + 1 * 32, utsname()->nodename, 32); 526 memcpy(tmp + 2 * 32, utsname()->release, 32); 527 memcpy(tmp + 3 * 32, utsname()->version, 32); 528 memcpy(tmp + 4 * 32, utsname()->machine, 32); 529 up_read(&uts_sem); 530 531 if (copy_to_user(name, tmp, sizeof(tmp))) 532 return -EFAULT; 533 return 0; 534 } 535 536 SYSCALL_DEFINE0(getpagesize) 537 { 538 return PAGE_SIZE; 539 } 540 541 SYSCALL_DEFINE0(getdtablesize) 542 { 543 return sysctl_nr_open; 544 } 545 546 /* 547 * For compatibility with OSF/1 only. Use utsname(2) instead. 548 */ 549 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 550 { 551 int len; 552 char *kname; 553 char tmp[32]; 554 555 if (namelen < 0 || namelen > 32) 556 namelen = 32; 557 558 down_read(&uts_sem); 559 kname = utsname()->domainname; 560 len = strnlen(kname, namelen); 561 len = min(len + 1, namelen); 562 memcpy(tmp, kname, len); 563 up_read(&uts_sem); 564 565 if (copy_to_user(name, tmp, len)) 566 return -EFAULT; 567 return 0; 568 } 569 570 /* 571 * The following stuff should move into a header file should it ever 572 * be labeled "officially supported." Right now, there is just enough 573 * support to avoid applications (such as tar) printing error 574 * messages. The attributes are not really implemented. 575 */ 576 577 /* 578 * Values for Property list entry flag 579 */ 580 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 581 by default */ 582 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 583 #define PLE_FLAG_ALL -1 /* All flag value */ 584 585 struct proplistname_args { 586 unsigned int pl_mask; 587 unsigned int pl_numnames; 588 char **pl_names; 589 }; 590 591 union pl_args { 592 struct setargs { 593 char __user *path; 594 long follow; 595 long nbytes; 596 char __user *buf; 597 } set; 598 struct fsetargs { 599 long fd; 600 long nbytes; 601 char __user *buf; 602 } fset; 603 struct getargs { 604 char __user *path; 605 long follow; 606 struct proplistname_args __user *name_args; 607 long nbytes; 608 char __user *buf; 609 int __user *min_buf_size; 610 } get; 611 struct fgetargs { 612 long fd; 613 struct proplistname_args __user *name_args; 614 long nbytes; 615 char __user *buf; 616 int __user *min_buf_size; 617 } fget; 618 struct delargs { 619 char __user *path; 620 long follow; 621 struct proplistname_args __user *name_args; 622 } del; 623 struct fdelargs { 624 long fd; 625 struct proplistname_args __user *name_args; 626 } fdel; 627 }; 628 629 enum pl_code { 630 PL_SET = 1, PL_FSET = 2, 631 PL_GET = 3, PL_FGET = 4, 632 PL_DEL = 5, PL_FDEL = 6 633 }; 634 635 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 636 union pl_args __user *, args) 637 { 638 long error; 639 int __user *min_buf_size_ptr; 640 641 switch (code) { 642 case PL_SET: 643 if (get_user(error, &args->set.nbytes)) 644 error = -EFAULT; 645 break; 646 case PL_FSET: 647 if (get_user(error, &args->fset.nbytes)) 648 error = -EFAULT; 649 break; 650 case PL_GET: 651 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 652 if (error) 653 break; 654 error = put_user(0, min_buf_size_ptr); 655 break; 656 case PL_FGET: 657 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 658 if (error) 659 break; 660 error = put_user(0, min_buf_size_ptr); 661 break; 662 case PL_DEL: 663 case PL_FDEL: 664 error = 0; 665 break; 666 default: 667 error = -EOPNOTSUPP; 668 break; 669 } 670 return error; 671 } 672 673 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 674 struct sigstack __user *, uoss) 675 { 676 unsigned long usp = rdusp(); 677 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 678 unsigned long oss_os = on_sig_stack(usp); 679 int error; 680 681 if (uss) { 682 void __user *ss_sp; 683 684 error = -EFAULT; 685 if (get_user(ss_sp, &uss->ss_sp)) 686 goto out; 687 688 /* If the current stack was set with sigaltstack, don't 689 swap stacks while we are on it. */ 690 error = -EPERM; 691 if (current->sas_ss_sp && on_sig_stack(usp)) 692 goto out; 693 694 /* Since we don't know the extent of the stack, and we don't 695 track onstack-ness, but rather calculate it, we must 696 presume a size. Ho hum this interface is lossy. */ 697 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 698 current->sas_ss_size = SIGSTKSZ; 699 } 700 701 if (uoss) { 702 error = -EFAULT; 703 if (put_user(oss_sp, &uoss->ss_sp) || 704 put_user(oss_os, &uoss->ss_onstack)) 705 goto out; 706 } 707 708 error = 0; 709 out: 710 return error; 711 } 712 713 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 714 { 715 const char *sysinfo_table[] = { 716 utsname()->sysname, 717 utsname()->nodename, 718 utsname()->release, 719 utsname()->version, 720 utsname()->machine, 721 "alpha", /* instruction set architecture */ 722 "dummy", /* hardware serial number */ 723 "dummy", /* hardware manufacturer */ 724 "dummy", /* secure RPC domain */ 725 }; 726 unsigned long offset; 727 const char *res; 728 long len; 729 char tmp[__NEW_UTS_LEN + 1]; 730 731 offset = command-1; 732 if (offset >= ARRAY_SIZE(sysinfo_table)) { 733 /* Digital UNIX has a few unpublished interfaces here */ 734 printk("sysinfo(%d)", command); 735 return -EINVAL; 736 } 737 738 down_read(&uts_sem); 739 res = sysinfo_table[offset]; 740 len = strlen(res)+1; 741 if ((unsigned long)len > (unsigned long)count) 742 len = count; 743 memcpy(tmp, res, len); 744 up_read(&uts_sem); 745 if (copy_to_user(buf, tmp, len)) 746 return -EFAULT; 747 return 0; 748 } 749 750 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 751 unsigned long, nbytes, int __user *, start, void __user *, arg) 752 { 753 unsigned long w; 754 struct percpu_struct *cpu; 755 756 switch (op) { 757 case GSI_IEEE_FP_CONTROL: 758 /* Return current software fp control & status bits. */ 759 /* Note that DU doesn't verify available space here. */ 760 761 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 762 w = swcr_update_status(w, rdfpcr()); 763 if (put_user(w, (unsigned long __user *) buffer)) 764 return -EFAULT; 765 return 0; 766 767 case GSI_IEEE_STATE_AT_SIGNAL: 768 /* 769 * Not sure anybody will ever use this weird stuff. These 770 * ops can be used (under OSF/1) to set the fpcr that should 771 * be used when a signal handler starts executing. 772 */ 773 break; 774 775 case GSI_UACPROC: 776 if (nbytes < sizeof(unsigned int)) 777 return -EINVAL; 778 w = current_thread_info()->status & UAC_BITMASK; 779 if (put_user(w, (unsigned int __user *)buffer)) 780 return -EFAULT; 781 return 1; 782 783 case GSI_PROC_TYPE: 784 if (nbytes < sizeof(unsigned long)) 785 return -EINVAL; 786 cpu = (struct percpu_struct*) 787 ((char*)hwrpb + hwrpb->processor_offset); 788 w = cpu->type; 789 if (put_user(w, (unsigned long __user*)buffer)) 790 return -EFAULT; 791 return 1; 792 793 case GSI_GET_HWRPB: 794 if (nbytes > sizeof(*hwrpb)) 795 return -EINVAL; 796 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 797 return -EFAULT; 798 return 1; 799 800 default: 801 break; 802 } 803 804 return -EOPNOTSUPP; 805 } 806 807 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 808 unsigned long, nbytes, int __user *, start, void __user *, arg) 809 { 810 switch (op) { 811 case SSI_IEEE_FP_CONTROL: { 812 unsigned long swcr, fpcr; 813 unsigned int *state; 814 815 /* 816 * Alpha Architecture Handbook 4.7.7.3: 817 * To be fully IEEE compiant, we must track the current IEEE 818 * exception state in software, because spurious bits can be 819 * set in the trap shadow of a software-complete insn. 820 */ 821 822 if (get_user(swcr, (unsigned long __user *)buffer)) 823 return -EFAULT; 824 state = ¤t_thread_info()->ieee_state; 825 826 /* Update software trap enable bits. */ 827 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 828 829 /* Update the real fpcr. */ 830 fpcr = rdfpcr() & FPCR_DYN_MASK; 831 fpcr |= ieee_swcr_to_fpcr(swcr); 832 wrfpcr(fpcr); 833 834 return 0; 835 } 836 837 case SSI_IEEE_RAISE_EXCEPTION: { 838 unsigned long exc, swcr, fpcr, fex; 839 unsigned int *state; 840 841 if (get_user(exc, (unsigned long __user *)buffer)) 842 return -EFAULT; 843 state = ¤t_thread_info()->ieee_state; 844 exc &= IEEE_STATUS_MASK; 845 846 /* Update software trap enable bits. */ 847 swcr = (*state & IEEE_SW_MASK) | exc; 848 *state |= exc; 849 850 /* Update the real fpcr. */ 851 fpcr = rdfpcr(); 852 fpcr |= ieee_swcr_to_fpcr(swcr); 853 wrfpcr(fpcr); 854 855 /* If any exceptions set by this call, and are unmasked, 856 send a signal. Old exceptions are not signaled. */ 857 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 858 if (fex) { 859 int si_code = FPE_FLTUNK; 860 861 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 862 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 863 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 864 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 865 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 866 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 867 868 send_sig_fault_trapno(SIGFPE, si_code, 869 (void __user *)NULL, /* FIXME */ 870 0, current); 871 } 872 return 0; 873 } 874 875 case SSI_IEEE_STATE_AT_SIGNAL: 876 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 877 /* 878 * Not sure anybody will ever use this weird stuff. These 879 * ops can be used (under OSF/1) to set the fpcr that should 880 * be used when a signal handler starts executing. 881 */ 882 break; 883 884 case SSI_NVPAIRS: { 885 unsigned __user *p = buffer; 886 unsigned i; 887 888 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 889 unsigned v, w, status; 890 891 if (get_user(v, p) || get_user(w, p + 1)) 892 return -EFAULT; 893 switch (v) { 894 case SSIN_UACPROC: 895 w &= UAC_BITMASK; 896 status = current_thread_info()->status; 897 status = (status & ~UAC_BITMASK) | w; 898 current_thread_info()->status = status; 899 break; 900 901 default: 902 return -EOPNOTSUPP; 903 } 904 } 905 return 0; 906 } 907 908 case SSI_LMF: 909 return 0; 910 911 default: 912 break; 913 } 914 915 return -EOPNOTSUPP; 916 } 917 918 /* Translations due to the fact that OSF's time_t is an int. Which 919 affects all sorts of things, like timeval and itimerval. */ 920 921 extern struct timezone sys_tz; 922 923 struct timeval32 924 { 925 int tv_sec, tv_usec; 926 }; 927 928 struct itimerval32 929 { 930 struct timeval32 it_interval; 931 struct timeval32 it_value; 932 }; 933 934 static inline long 935 get_tv32(struct timespec64 *o, struct timeval32 __user *i) 936 { 937 struct timeval32 tv; 938 if (copy_from_user(&tv, i, sizeof(struct timeval32))) 939 return -EFAULT; 940 o->tv_sec = tv.tv_sec; 941 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC; 942 return 0; 943 } 944 945 static inline long 946 put_tv32(struct timeval32 __user *o, struct timespec64 *i) 947 { 948 return copy_to_user(o, &(struct timeval32){ 949 .tv_sec = i->tv_sec, 950 .tv_usec = i->tv_nsec / NSEC_PER_USEC}, 951 sizeof(struct timeval32)); 952 } 953 954 static inline long 955 put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i) 956 { 957 return copy_to_user(o, &(struct timeval32){ 958 .tv_sec = i->tv_sec, 959 .tv_usec = i->tv_usec}, 960 sizeof(struct timeval32)); 961 } 962 963 static inline void 964 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 965 { 966 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 967 value->tv_sec = jiffies / HZ; 968 } 969 970 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 971 struct timezone __user *, tz) 972 { 973 if (tv) { 974 struct timespec64 kts; 975 976 ktime_get_real_ts64(&kts); 977 if (put_tv32(tv, &kts)) 978 return -EFAULT; 979 } 980 if (tz) { 981 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 982 return -EFAULT; 983 } 984 return 0; 985 } 986 987 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 988 struct timezone __user *, tz) 989 { 990 struct timespec64 kts; 991 struct timezone ktz; 992 993 if (tv) { 994 if (get_tv32(&kts, tv)) 995 return -EFAULT; 996 } 997 if (tz) { 998 if (copy_from_user(&ktz, tz, sizeof(*tz))) 999 return -EFAULT; 1000 } 1001 1002 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL); 1003 } 1004 1005 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1006 struct timeval32 __user *, tvs) 1007 { 1008 struct timespec64 tv[2]; 1009 1010 if (tvs) { 1011 if (get_tv32(&tv[0], &tvs[0]) || 1012 get_tv32(&tv[1], &tvs[1])) 1013 return -EFAULT; 1014 1015 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || 1016 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) 1017 return -EINVAL; 1018 } 1019 1020 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1021 } 1022 1023 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1024 fd_set __user *, exp, struct timeval32 __user *, tvp) 1025 { 1026 struct timespec64 end_time, *to = NULL; 1027 if (tvp) { 1028 struct timespec64 tv; 1029 to = &end_time; 1030 1031 if (get_tv32(&tv, tvp)) 1032 return -EFAULT; 1033 1034 if (tv.tv_sec < 0 || tv.tv_nsec < 0) 1035 return -EINVAL; 1036 1037 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) 1038 return -EINVAL; 1039 1040 } 1041 1042 /* OSF does not copy back the remaining time. */ 1043 return core_sys_select(n, inp, outp, exp, to); 1044 } 1045 1046 struct rusage32 { 1047 struct timeval32 ru_utime; /* user time used */ 1048 struct timeval32 ru_stime; /* system time used */ 1049 long ru_maxrss; /* maximum resident set size */ 1050 long ru_ixrss; /* integral shared memory size */ 1051 long ru_idrss; /* integral unshared data size */ 1052 long ru_isrss; /* integral unshared stack size */ 1053 long ru_minflt; /* page reclaims */ 1054 long ru_majflt; /* page faults */ 1055 long ru_nswap; /* swaps */ 1056 long ru_inblock; /* block input operations */ 1057 long ru_oublock; /* block output operations */ 1058 long ru_msgsnd; /* messages sent */ 1059 long ru_msgrcv; /* messages received */ 1060 long ru_nsignals; /* signals received */ 1061 long ru_nvcsw; /* voluntary context switches */ 1062 long ru_nivcsw; /* involuntary " */ 1063 }; 1064 1065 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1066 { 1067 struct rusage32 r; 1068 u64 utime, stime; 1069 unsigned long utime_jiffies, stime_jiffies; 1070 1071 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1072 return -EINVAL; 1073 1074 memset(&r, 0, sizeof(r)); 1075 switch (who) { 1076 case RUSAGE_SELF: 1077 task_cputime(current, &utime, &stime); 1078 utime_jiffies = nsecs_to_jiffies(utime); 1079 stime_jiffies = nsecs_to_jiffies(stime); 1080 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1081 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1082 r.ru_minflt = current->min_flt; 1083 r.ru_majflt = current->maj_flt; 1084 break; 1085 case RUSAGE_CHILDREN: 1086 utime_jiffies = nsecs_to_jiffies(current->signal->cutime); 1087 stime_jiffies = nsecs_to_jiffies(current->signal->cstime); 1088 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1089 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1090 r.ru_minflt = current->signal->cmin_flt; 1091 r.ru_majflt = current->signal->cmaj_flt; 1092 break; 1093 } 1094 1095 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1096 } 1097 1098 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1099 struct rusage32 __user *, ur) 1100 { 1101 struct rusage r; 1102 long err = kernel_wait4(pid, ustatus, options, &r); 1103 if (err <= 0) 1104 return err; 1105 if (!ur) 1106 return err; 1107 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) 1108 return -EFAULT; 1109 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) 1110 return -EFAULT; 1111 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, 1112 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) 1113 return -EFAULT; 1114 return err; 1115 } 1116 1117 /* 1118 * I don't know what the parameters are: the first one 1119 * seems to be a timeval pointer, and I suspect the second 1120 * one is the time remaining.. Ho humm.. No documentation. 1121 */ 1122 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1123 struct timeval32 __user *, remain) 1124 { 1125 struct timespec64 tmp; 1126 unsigned long ticks; 1127 1128 if (get_tv32(&tmp, sleep)) 1129 goto fault; 1130 1131 ticks = timespec64_to_jiffies(&tmp); 1132 1133 ticks = schedule_timeout_interruptible(ticks); 1134 1135 if (remain) { 1136 jiffies_to_timespec64(ticks, &tmp); 1137 if (put_tv32(remain, &tmp)) 1138 goto fault; 1139 } 1140 1141 return 0; 1142 fault: 1143 return -EFAULT; 1144 } 1145 1146 1147 struct timex32 { 1148 unsigned int modes; /* mode selector */ 1149 long offset; /* time offset (usec) */ 1150 long freq; /* frequency offset (scaled ppm) */ 1151 long maxerror; /* maximum error (usec) */ 1152 long esterror; /* estimated error (usec) */ 1153 int status; /* clock command/status */ 1154 long constant; /* pll time constant */ 1155 long precision; /* clock precision (usec) (read only) */ 1156 long tolerance; /* clock frequency tolerance (ppm) 1157 * (read only) 1158 */ 1159 struct timeval32 time; /* (read only) */ 1160 long tick; /* (modified) usecs between clock ticks */ 1161 1162 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1163 long jitter; /* pps jitter (us) (ro) */ 1164 int shift; /* interval duration (s) (shift) (ro) */ 1165 long stabil; /* pps stability (scaled ppm) (ro) */ 1166 long jitcnt; /* jitter limit exceeded (ro) */ 1167 long calcnt; /* calibration intervals (ro) */ 1168 long errcnt; /* calibration errors (ro) */ 1169 long stbcnt; /* stability limit exceeded (ro) */ 1170 1171 int :32; int :32; int :32; int :32; 1172 int :32; int :32; int :32; int :32; 1173 int :32; int :32; int :32; int :32; 1174 }; 1175 1176 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1177 { 1178 struct __kernel_timex txc; 1179 int ret; 1180 1181 /* copy relevant bits of struct timex. */ 1182 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1183 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1184 offsetof(struct timex32, tick))) 1185 return -EFAULT; 1186 1187 ret = do_adjtimex(&txc); 1188 if (ret < 0) 1189 return ret; 1190 1191 /* copy back to timex32 */ 1192 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1193 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1194 offsetof(struct timex32, tick))) || 1195 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) || 1196 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec))) 1197 return -EFAULT; 1198 1199 return ret; 1200 } 1201 1202 /* Get an address range which is currently unmapped. */ 1203 1204 static unsigned long 1205 arch_get_unmapped_area_1(struct file *filp, unsigned long addr, 1206 unsigned long len, unsigned long limit) 1207 { 1208 struct vm_unmapped_area_info info = {}; 1209 1210 info.length = len; 1211 info.low_limit = addr; 1212 info.high_limit = limit; 1213 if (filp && is_file_hugepages(filp)) 1214 info.align_mask = huge_page_mask_align(filp); 1215 return vm_unmapped_area(&info); 1216 } 1217 1218 unsigned long 1219 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1220 unsigned long len, unsigned long pgoff, 1221 unsigned long flags, vm_flags_t vm_flags) 1222 { 1223 unsigned long limit = TASK_SIZE; 1224 1225 if (len > limit) 1226 return -ENOMEM; 1227 1228 if (flags & MAP_FIXED) 1229 return addr; 1230 1231 /* First, see if the given suggestion fits. 1232 1233 The OSF/1 loader (/sbin/loader) relies on us returning an 1234 address larger than the requested if one exists, which is 1235 a terribly broken way to program. 1236 1237 That said, I can see the use in being able to suggest not 1238 merely specific addresses, but regions of memory -- perhaps 1239 this feature should be incorporated into all ports? */ 1240 1241 if (addr) { 1242 addr = arch_get_unmapped_area_1 (filp, PAGE_ALIGN(addr), len, 1243 limit); 1244 if (addr != (unsigned long) -ENOMEM) 1245 return addr; 1246 } 1247 1248 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1249 addr = arch_get_unmapped_area_1 (filp, PAGE_ALIGN(TASK_UNMAPPED_BASE), 1250 len, limit); 1251 if (addr != (unsigned long) -ENOMEM) 1252 return addr; 1253 1254 /* Finally, try allocating in low memory. */ 1255 addr = arch_get_unmapped_area_1 (filp, PAGE_SIZE, len, limit); 1256 1257 return addr; 1258 } 1259 1260 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1261 { 1262 int prio = sys_getpriority(which, who); 1263 if (prio >= 0) { 1264 /* Return value is the unbiased priority, i.e. 20 - prio. 1265 This does result in negative return values, so signal 1266 no error */ 1267 force_successful_syscall_return(); 1268 prio = 20 - prio; 1269 } 1270 return prio; 1271 } 1272 1273 SYSCALL_DEFINE0(getxuid) 1274 { 1275 current_pt_regs()->r20 = sys_geteuid(); 1276 return sys_getuid(); 1277 } 1278 1279 SYSCALL_DEFINE0(getxgid) 1280 { 1281 current_pt_regs()->r20 = sys_getegid(); 1282 return sys_getgid(); 1283 } 1284 1285 SYSCALL_DEFINE0(getxpid) 1286 { 1287 current_pt_regs()->r20 = sys_getppid(); 1288 return sys_getpid(); 1289 } 1290 1291 SYSCALL_DEFINE0(alpha_pipe) 1292 { 1293 int fd[2]; 1294 int res = do_pipe_flags(fd, 0); 1295 if (!res) { 1296 /* The return values are in $0 and $20. */ 1297 current_pt_regs()->r20 = fd[1]; 1298 res = fd[0]; 1299 } 1300 return res; 1301 } 1302 1303 SYSCALL_DEFINE1(sethae, unsigned long, val) 1304 { 1305 current_pt_regs()->hae = val; 1306 return 0; 1307 } 1308