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 int retval; 458 struct cdfs_args tmp; 459 struct filename *devname; 460 461 retval = -EFAULT; 462 if (copy_from_user(&tmp, args, sizeof(tmp))) 463 goto out; 464 devname = getname(tmp.devname); 465 retval = PTR_ERR(devname); 466 if (IS_ERR(devname)) 467 goto out; 468 retval = do_mount(devname->name, dirname, "ext2", flags, NULL); 469 putname(devname); 470 out: 471 return retval; 472 } 473 474 static int 475 osf_cdfs_mount(const char __user *dirname, 476 struct cdfs_args __user *args, int flags) 477 { 478 int retval; 479 struct cdfs_args tmp; 480 struct filename *devname; 481 482 retval = -EFAULT; 483 if (copy_from_user(&tmp, args, sizeof(tmp))) 484 goto out; 485 devname = getname(tmp.devname); 486 retval = PTR_ERR(devname); 487 if (IS_ERR(devname)) 488 goto out; 489 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL); 490 putname(devname); 491 out: 492 return retval; 493 } 494 495 static int 496 osf_procfs_mount(const char __user *dirname, 497 struct procfs_args __user *args, int flags) 498 { 499 struct procfs_args tmp; 500 501 if (copy_from_user(&tmp, args, sizeof(tmp))) 502 return -EFAULT; 503 504 return do_mount("", dirname, "proc", flags, NULL); 505 } 506 507 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 508 int, flag, void __user *, data) 509 { 510 int retval; 511 512 switch (typenr) { 513 case 1: 514 retval = osf_ufs_mount(path, data, flag); 515 break; 516 case 6: 517 retval = osf_cdfs_mount(path, data, flag); 518 break; 519 case 9: 520 retval = osf_procfs_mount(path, data, flag); 521 break; 522 default: 523 retval = -EINVAL; 524 printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag); 525 } 526 527 return retval; 528 } 529 530 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 531 { 532 char tmp[5 * 32]; 533 534 down_read(&uts_sem); 535 memcpy(tmp + 0 * 32, utsname()->sysname, 32); 536 memcpy(tmp + 1 * 32, utsname()->nodename, 32); 537 memcpy(tmp + 2 * 32, utsname()->release, 32); 538 memcpy(tmp + 3 * 32, utsname()->version, 32); 539 memcpy(tmp + 4 * 32, utsname()->machine, 32); 540 up_read(&uts_sem); 541 542 if (copy_to_user(name, tmp, sizeof(tmp))) 543 return -EFAULT; 544 return 0; 545 } 546 547 SYSCALL_DEFINE0(getpagesize) 548 { 549 return PAGE_SIZE; 550 } 551 552 SYSCALL_DEFINE0(getdtablesize) 553 { 554 return sysctl_nr_open; 555 } 556 557 /* 558 * For compatibility with OSF/1 only. Use utsname(2) instead. 559 */ 560 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 561 { 562 int len; 563 char *kname; 564 char tmp[32]; 565 566 if (namelen < 0 || namelen > 32) 567 namelen = 32; 568 569 down_read(&uts_sem); 570 kname = utsname()->domainname; 571 len = strnlen(kname, namelen); 572 len = min(len + 1, namelen); 573 memcpy(tmp, kname, len); 574 up_read(&uts_sem); 575 576 if (copy_to_user(name, tmp, len)) 577 return -EFAULT; 578 return 0; 579 } 580 581 /* 582 * The following stuff should move into a header file should it ever 583 * be labeled "officially supported." Right now, there is just enough 584 * support to avoid applications (such as tar) printing error 585 * messages. The attributes are not really implemented. 586 */ 587 588 /* 589 * Values for Property list entry flag 590 */ 591 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 592 by default */ 593 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 594 #define PLE_FLAG_ALL -1 /* All flag value */ 595 596 struct proplistname_args { 597 unsigned int pl_mask; 598 unsigned int pl_numnames; 599 char **pl_names; 600 }; 601 602 union pl_args { 603 struct setargs { 604 char __user *path; 605 long follow; 606 long nbytes; 607 char __user *buf; 608 } set; 609 struct fsetargs { 610 long fd; 611 long nbytes; 612 char __user *buf; 613 } fset; 614 struct getargs { 615 char __user *path; 616 long follow; 617 struct proplistname_args __user *name_args; 618 long nbytes; 619 char __user *buf; 620 int __user *min_buf_size; 621 } get; 622 struct fgetargs { 623 long fd; 624 struct proplistname_args __user *name_args; 625 long nbytes; 626 char __user *buf; 627 int __user *min_buf_size; 628 } fget; 629 struct delargs { 630 char __user *path; 631 long follow; 632 struct proplistname_args __user *name_args; 633 } del; 634 struct fdelargs { 635 long fd; 636 struct proplistname_args __user *name_args; 637 } fdel; 638 }; 639 640 enum pl_code { 641 PL_SET = 1, PL_FSET = 2, 642 PL_GET = 3, PL_FGET = 4, 643 PL_DEL = 5, PL_FDEL = 6 644 }; 645 646 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 647 union pl_args __user *, args) 648 { 649 long error; 650 int __user *min_buf_size_ptr; 651 652 switch (code) { 653 case PL_SET: 654 if (get_user(error, &args->set.nbytes)) 655 error = -EFAULT; 656 break; 657 case PL_FSET: 658 if (get_user(error, &args->fset.nbytes)) 659 error = -EFAULT; 660 break; 661 case PL_GET: 662 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 663 if (error) 664 break; 665 error = put_user(0, min_buf_size_ptr); 666 break; 667 case PL_FGET: 668 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 669 if (error) 670 break; 671 error = put_user(0, min_buf_size_ptr); 672 break; 673 case PL_DEL: 674 case PL_FDEL: 675 error = 0; 676 break; 677 default: 678 error = -EOPNOTSUPP; 679 break; 680 } 681 return error; 682 } 683 684 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 685 struct sigstack __user *, uoss) 686 { 687 unsigned long usp = rdusp(); 688 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 689 unsigned long oss_os = on_sig_stack(usp); 690 int error; 691 692 if (uss) { 693 void __user *ss_sp; 694 695 error = -EFAULT; 696 if (get_user(ss_sp, &uss->ss_sp)) 697 goto out; 698 699 /* If the current stack was set with sigaltstack, don't 700 swap stacks while we are on it. */ 701 error = -EPERM; 702 if (current->sas_ss_sp && on_sig_stack(usp)) 703 goto out; 704 705 /* Since we don't know the extent of the stack, and we don't 706 track onstack-ness, but rather calculate it, we must 707 presume a size. Ho hum this interface is lossy. */ 708 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 709 current->sas_ss_size = SIGSTKSZ; 710 } 711 712 if (uoss) { 713 error = -EFAULT; 714 if (put_user(oss_sp, &uoss->ss_sp) || 715 put_user(oss_os, &uoss->ss_onstack)) 716 goto out; 717 } 718 719 error = 0; 720 out: 721 return error; 722 } 723 724 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 725 { 726 const char *sysinfo_table[] = { 727 utsname()->sysname, 728 utsname()->nodename, 729 utsname()->release, 730 utsname()->version, 731 utsname()->machine, 732 "alpha", /* instruction set architecture */ 733 "dummy", /* hardware serial number */ 734 "dummy", /* hardware manufacturer */ 735 "dummy", /* secure RPC domain */ 736 }; 737 unsigned long offset; 738 const char *res; 739 long len; 740 char tmp[__NEW_UTS_LEN + 1]; 741 742 offset = command-1; 743 if (offset >= ARRAY_SIZE(sysinfo_table)) { 744 /* Digital UNIX has a few unpublished interfaces here */ 745 printk("sysinfo(%d)", command); 746 return -EINVAL; 747 } 748 749 down_read(&uts_sem); 750 res = sysinfo_table[offset]; 751 len = strlen(res)+1; 752 if ((unsigned long)len > (unsigned long)count) 753 len = count; 754 memcpy(tmp, res, len); 755 up_read(&uts_sem); 756 if (copy_to_user(buf, tmp, len)) 757 return -EFAULT; 758 return 0; 759 } 760 761 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 762 unsigned long, nbytes, int __user *, start, void __user *, arg) 763 { 764 unsigned long w; 765 struct percpu_struct *cpu; 766 767 switch (op) { 768 case GSI_IEEE_FP_CONTROL: 769 /* Return current software fp control & status bits. */ 770 /* Note that DU doesn't verify available space here. */ 771 772 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 773 w = swcr_update_status(w, rdfpcr()); 774 if (put_user(w, (unsigned long __user *) buffer)) 775 return -EFAULT; 776 return 0; 777 778 case GSI_IEEE_STATE_AT_SIGNAL: 779 /* 780 * Not sure anybody will ever use this weird stuff. These 781 * ops can be used (under OSF/1) to set the fpcr that should 782 * be used when a signal handler starts executing. 783 */ 784 break; 785 786 case GSI_UACPROC: 787 if (nbytes < sizeof(unsigned int)) 788 return -EINVAL; 789 w = current_thread_info()->status & UAC_BITMASK; 790 if (put_user(w, (unsigned int __user *)buffer)) 791 return -EFAULT; 792 return 1; 793 794 case GSI_PROC_TYPE: 795 if (nbytes < sizeof(unsigned long)) 796 return -EINVAL; 797 cpu = (struct percpu_struct*) 798 ((char*)hwrpb + hwrpb->processor_offset); 799 w = cpu->type; 800 if (put_user(w, (unsigned long __user*)buffer)) 801 return -EFAULT; 802 return 1; 803 804 case GSI_GET_HWRPB: 805 if (nbytes > sizeof(*hwrpb)) 806 return -EINVAL; 807 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 808 return -EFAULT; 809 return 1; 810 811 default: 812 break; 813 } 814 815 return -EOPNOTSUPP; 816 } 817 818 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 819 unsigned long, nbytes, int __user *, start, void __user *, arg) 820 { 821 switch (op) { 822 case SSI_IEEE_FP_CONTROL: { 823 unsigned long swcr, fpcr; 824 unsigned int *state; 825 826 /* 827 * Alpha Architecture Handbook 4.7.7.3: 828 * To be fully IEEE compiant, we must track the current IEEE 829 * exception state in software, because spurious bits can be 830 * set in the trap shadow of a software-complete insn. 831 */ 832 833 if (get_user(swcr, (unsigned long __user *)buffer)) 834 return -EFAULT; 835 state = ¤t_thread_info()->ieee_state; 836 837 /* Update software trap enable bits. */ 838 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 839 840 /* Update the real fpcr. */ 841 fpcr = rdfpcr() & FPCR_DYN_MASK; 842 fpcr |= ieee_swcr_to_fpcr(swcr); 843 wrfpcr(fpcr); 844 845 return 0; 846 } 847 848 case SSI_IEEE_RAISE_EXCEPTION: { 849 unsigned long exc, swcr, fpcr, fex; 850 unsigned int *state; 851 852 if (get_user(exc, (unsigned long __user *)buffer)) 853 return -EFAULT; 854 state = ¤t_thread_info()->ieee_state; 855 exc &= IEEE_STATUS_MASK; 856 857 /* Update software trap enable bits. */ 858 swcr = (*state & IEEE_SW_MASK) | exc; 859 *state |= exc; 860 861 /* Update the real fpcr. */ 862 fpcr = rdfpcr(); 863 fpcr |= ieee_swcr_to_fpcr(swcr); 864 wrfpcr(fpcr); 865 866 /* If any exceptions set by this call, and are unmasked, 867 send a signal. Old exceptions are not signaled. */ 868 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 869 if (fex) { 870 int si_code = FPE_FLTUNK; 871 872 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 873 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 874 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 875 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 876 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 877 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 878 879 send_sig_fault_trapno(SIGFPE, si_code, 880 (void __user *)NULL, /* FIXME */ 881 0, current); 882 } 883 return 0; 884 } 885 886 case SSI_IEEE_STATE_AT_SIGNAL: 887 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 888 /* 889 * Not sure anybody will ever use this weird stuff. These 890 * ops can be used (under OSF/1) to set the fpcr that should 891 * be used when a signal handler starts executing. 892 */ 893 break; 894 895 case SSI_NVPAIRS: { 896 unsigned __user *p = buffer; 897 unsigned i; 898 899 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) { 900 unsigned v, w, status; 901 902 if (get_user(v, p) || get_user(w, p + 1)) 903 return -EFAULT; 904 switch (v) { 905 case SSIN_UACPROC: 906 w &= UAC_BITMASK; 907 status = current_thread_info()->status; 908 status = (status & ~UAC_BITMASK) | w; 909 current_thread_info()->status = status; 910 break; 911 912 default: 913 return -EOPNOTSUPP; 914 } 915 } 916 return 0; 917 } 918 919 case SSI_LMF: 920 return 0; 921 922 default: 923 break; 924 } 925 926 return -EOPNOTSUPP; 927 } 928 929 /* Translations due to the fact that OSF's time_t is an int. Which 930 affects all sorts of things, like timeval and itimerval. */ 931 932 extern struct timezone sys_tz; 933 934 struct timeval32 935 { 936 int tv_sec, tv_usec; 937 }; 938 939 struct itimerval32 940 { 941 struct timeval32 it_interval; 942 struct timeval32 it_value; 943 }; 944 945 static inline long 946 get_tv32(struct timespec64 *o, struct timeval32 __user *i) 947 { 948 struct timeval32 tv; 949 if (copy_from_user(&tv, i, sizeof(struct timeval32))) 950 return -EFAULT; 951 o->tv_sec = tv.tv_sec; 952 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC; 953 return 0; 954 } 955 956 static inline long 957 put_tv32(struct timeval32 __user *o, struct timespec64 *i) 958 { 959 return copy_to_user(o, &(struct timeval32){ 960 .tv_sec = i->tv_sec, 961 .tv_usec = i->tv_nsec / NSEC_PER_USEC}, 962 sizeof(struct timeval32)); 963 } 964 965 static inline long 966 put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i) 967 { 968 return copy_to_user(o, &(struct timeval32){ 969 .tv_sec = i->tv_sec, 970 .tv_usec = i->tv_usec}, 971 sizeof(struct timeval32)); 972 } 973 974 static inline void 975 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 976 { 977 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 978 value->tv_sec = jiffies / HZ; 979 } 980 981 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 982 struct timezone __user *, tz) 983 { 984 if (tv) { 985 struct timespec64 kts; 986 987 ktime_get_real_ts64(&kts); 988 if (put_tv32(tv, &kts)) 989 return -EFAULT; 990 } 991 if (tz) { 992 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 993 return -EFAULT; 994 } 995 return 0; 996 } 997 998 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 999 struct timezone __user *, tz) 1000 { 1001 struct timespec64 kts; 1002 struct timezone ktz; 1003 1004 if (tv) { 1005 if (get_tv32(&kts, tv)) 1006 return -EFAULT; 1007 } 1008 if (tz) { 1009 if (copy_from_user(&ktz, tz, sizeof(*tz))) 1010 return -EFAULT; 1011 } 1012 1013 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL); 1014 } 1015 1016 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1017 struct timeval32 __user *, tvs) 1018 { 1019 struct timespec64 tv[2]; 1020 1021 if (tvs) { 1022 if (get_tv32(&tv[0], &tvs[0]) || 1023 get_tv32(&tv[1], &tvs[1])) 1024 return -EFAULT; 1025 1026 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || 1027 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) 1028 return -EINVAL; 1029 } 1030 1031 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1032 } 1033 1034 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1035 fd_set __user *, exp, struct timeval32 __user *, tvp) 1036 { 1037 struct timespec64 end_time, *to = NULL; 1038 if (tvp) { 1039 struct timespec64 tv; 1040 to = &end_time; 1041 1042 if (get_tv32(&tv, tvp)) 1043 return -EFAULT; 1044 1045 if (tv.tv_sec < 0 || tv.tv_nsec < 0) 1046 return -EINVAL; 1047 1048 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) 1049 return -EINVAL; 1050 1051 } 1052 1053 /* OSF does not copy back the remaining time. */ 1054 return core_sys_select(n, inp, outp, exp, to); 1055 } 1056 1057 struct rusage32 { 1058 struct timeval32 ru_utime; /* user time used */ 1059 struct timeval32 ru_stime; /* system time used */ 1060 long ru_maxrss; /* maximum resident set size */ 1061 long ru_ixrss; /* integral shared memory size */ 1062 long ru_idrss; /* integral unshared data size */ 1063 long ru_isrss; /* integral unshared stack size */ 1064 long ru_minflt; /* page reclaims */ 1065 long ru_majflt; /* page faults */ 1066 long ru_nswap; /* swaps */ 1067 long ru_inblock; /* block input operations */ 1068 long ru_oublock; /* block output operations */ 1069 long ru_msgsnd; /* messages sent */ 1070 long ru_msgrcv; /* messages received */ 1071 long ru_nsignals; /* signals received */ 1072 long ru_nvcsw; /* voluntary context switches */ 1073 long ru_nivcsw; /* involuntary " */ 1074 }; 1075 1076 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1077 { 1078 struct rusage32 r; 1079 u64 utime, stime; 1080 unsigned long utime_jiffies, stime_jiffies; 1081 1082 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1083 return -EINVAL; 1084 1085 memset(&r, 0, sizeof(r)); 1086 switch (who) { 1087 case RUSAGE_SELF: 1088 task_cputime(current, &utime, &stime); 1089 utime_jiffies = nsecs_to_jiffies(utime); 1090 stime_jiffies = nsecs_to_jiffies(stime); 1091 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1092 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1093 r.ru_minflt = current->min_flt; 1094 r.ru_majflt = current->maj_flt; 1095 break; 1096 case RUSAGE_CHILDREN: 1097 utime_jiffies = nsecs_to_jiffies(current->signal->cutime); 1098 stime_jiffies = nsecs_to_jiffies(current->signal->cstime); 1099 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1100 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1101 r.ru_minflt = current->signal->cmin_flt; 1102 r.ru_majflt = current->signal->cmaj_flt; 1103 break; 1104 } 1105 1106 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1107 } 1108 1109 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1110 struct rusage32 __user *, ur) 1111 { 1112 struct rusage r; 1113 long err = kernel_wait4(pid, ustatus, options, &r); 1114 if (err <= 0) 1115 return err; 1116 if (!ur) 1117 return err; 1118 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) 1119 return -EFAULT; 1120 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) 1121 return -EFAULT; 1122 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, 1123 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) 1124 return -EFAULT; 1125 return err; 1126 } 1127 1128 /* 1129 * I don't know what the parameters are: the first one 1130 * seems to be a timeval pointer, and I suspect the second 1131 * one is the time remaining.. Ho humm.. No documentation. 1132 */ 1133 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1134 struct timeval32 __user *, remain) 1135 { 1136 struct timespec64 tmp; 1137 unsigned long ticks; 1138 1139 if (get_tv32(&tmp, sleep)) 1140 goto fault; 1141 1142 ticks = timespec64_to_jiffies(&tmp); 1143 1144 ticks = schedule_timeout_interruptible(ticks); 1145 1146 if (remain) { 1147 jiffies_to_timespec64(ticks, &tmp); 1148 if (put_tv32(remain, &tmp)) 1149 goto fault; 1150 } 1151 1152 return 0; 1153 fault: 1154 return -EFAULT; 1155 } 1156 1157 1158 struct timex32 { 1159 unsigned int modes; /* mode selector */ 1160 long offset; /* time offset (usec) */ 1161 long freq; /* frequency offset (scaled ppm) */ 1162 long maxerror; /* maximum error (usec) */ 1163 long esterror; /* estimated error (usec) */ 1164 int status; /* clock command/status */ 1165 long constant; /* pll time constant */ 1166 long precision; /* clock precision (usec) (read only) */ 1167 long tolerance; /* clock frequency tolerance (ppm) 1168 * (read only) 1169 */ 1170 struct timeval32 time; /* (read only) */ 1171 long tick; /* (modified) usecs between clock ticks */ 1172 1173 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1174 long jitter; /* pps jitter (us) (ro) */ 1175 int shift; /* interval duration (s) (shift) (ro) */ 1176 long stabil; /* pps stability (scaled ppm) (ro) */ 1177 long jitcnt; /* jitter limit exceeded (ro) */ 1178 long calcnt; /* calibration intervals (ro) */ 1179 long errcnt; /* calibration errors (ro) */ 1180 long stbcnt; /* stability limit exceeded (ro) */ 1181 1182 int :32; int :32; int :32; int :32; 1183 int :32; int :32; int :32; int :32; 1184 int :32; int :32; int :32; int :32; 1185 }; 1186 1187 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1188 { 1189 struct __kernel_timex txc; 1190 int ret; 1191 1192 /* copy relevant bits of struct timex. */ 1193 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1194 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1195 offsetof(struct timex32, tick))) 1196 return -EFAULT; 1197 1198 ret = do_adjtimex(&txc); 1199 if (ret < 0) 1200 return ret; 1201 1202 /* copy back to timex32 */ 1203 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1204 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1205 offsetof(struct timex32, tick))) || 1206 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) || 1207 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec))) 1208 return -EFAULT; 1209 1210 return ret; 1211 } 1212 1213 /* Get an address range which is currently unmapped. Similar to the 1214 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1215 1216 static unsigned long 1217 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1218 unsigned long limit) 1219 { 1220 struct vm_unmapped_area_info info = {}; 1221 1222 info.length = len; 1223 info.low_limit = addr; 1224 info.high_limit = limit; 1225 return vm_unmapped_area(&info); 1226 } 1227 1228 unsigned long 1229 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1230 unsigned long len, unsigned long pgoff, 1231 unsigned long flags, vm_flags_t vm_flags) 1232 { 1233 unsigned long limit; 1234 1235 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1236 if (current->personality & ADDR_LIMIT_32BIT) 1237 limit = 0x80000000; 1238 else 1239 limit = TASK_SIZE; 1240 1241 if (len > limit) 1242 return -ENOMEM; 1243 1244 if (flags & MAP_FIXED) 1245 return addr; 1246 1247 /* First, see if the given suggestion fits. 1248 1249 The OSF/1 loader (/sbin/loader) relies on us returning an 1250 address larger than the requested if one exists, which is 1251 a terribly broken way to program. 1252 1253 That said, I can see the use in being able to suggest not 1254 merely specific addresses, but regions of memory -- perhaps 1255 this feature should be incorporated into all ports? */ 1256 1257 if (addr) { 1258 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1259 if (addr != (unsigned long) -ENOMEM) 1260 return addr; 1261 } 1262 1263 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1264 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1265 len, limit); 1266 if (addr != (unsigned long) -ENOMEM) 1267 return addr; 1268 1269 /* Finally, try allocating in low memory. */ 1270 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1271 1272 return addr; 1273 } 1274 1275 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1276 { 1277 int prio = sys_getpriority(which, who); 1278 if (prio >= 0) { 1279 /* Return value is the unbiased priority, i.e. 20 - prio. 1280 This does result in negative return values, so signal 1281 no error */ 1282 force_successful_syscall_return(); 1283 prio = 20 - prio; 1284 } 1285 return prio; 1286 } 1287 1288 SYSCALL_DEFINE0(getxuid) 1289 { 1290 current_pt_regs()->r20 = sys_geteuid(); 1291 return sys_getuid(); 1292 } 1293 1294 SYSCALL_DEFINE0(getxgid) 1295 { 1296 current_pt_regs()->r20 = sys_getegid(); 1297 return sys_getgid(); 1298 } 1299 1300 SYSCALL_DEFINE0(getxpid) 1301 { 1302 current_pt_regs()->r20 = sys_getppid(); 1303 return sys_getpid(); 1304 } 1305 1306 SYSCALL_DEFINE0(alpha_pipe) 1307 { 1308 int fd[2]; 1309 int res = do_pipe_flags(fd, 0); 1310 if (!res) { 1311 /* The return values are in $0 and $20. */ 1312 current_pt_regs()->r20 = fd[1]; 1313 res = fd[0]; 1314 } 1315 return res; 1316 } 1317 1318 SYSCALL_DEFINE1(sethae, unsigned long, val) 1319 { 1320 current_pt_regs()->hae = val; 1321 return 0; 1322 } 1323