1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/arch/alpha/kernel/osf_sys.c 4 * 5 * Copyright (C) 1995 Linus Torvalds 6 */ 7 8 /* 9 * This file handles some of the stranger OSF/1 system call interfaces. 10 * Some of the system calls expect a non-C calling standard, others have 11 * special parameter blocks.. 12 */ 13 14 #include <linux/errno.h> 15 #include <linux/sched/signal.h> 16 #include <linux/sched/mm.h> 17 #include <linux/sched/task_stack.h> 18 #include <linux/sched/cputime.h> 19 #include <linux/kernel.h> 20 #include <linux/mm.h> 21 #include <linux/smp.h> 22 #include <linux/stddef.h> 23 #include <linux/syscalls.h> 24 #include <linux/unistd.h> 25 #include <linux/ptrace.h> 26 #include <linux/user.h> 27 #include <linux/utsname.h> 28 #include <linux/time.h> 29 #include <linux/timex.h> 30 #include <linux/major.h> 31 #include <linux/stat.h> 32 #include <linux/mman.h> 33 #include <linux/shm.h> 34 #include <linux/poll.h> 35 #include <linux/file.h> 36 #include <linux/types.h> 37 #include <linux/ipc.h> 38 #include <linux/namei.h> 39 #include <linux/uio.h> 40 #include <linux/vfs.h> 41 #include <linux/rcupdate.h> 42 #include <linux/slab.h> 43 44 #include <asm/fpu.h> 45 #include <asm/io.h> 46 #include <linux/uaccess.h> 47 #include <asm/sysinfo.h> 48 #include <asm/thread_info.h> 49 #include <asm/hwrpb.h> 50 #include <asm/processor.h> 51 52 /* 53 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 54 * which OSF programs just shouldn't be doing. We're still not quite 55 * identical to OSF as we don't return 0 on success, but doing otherwise 56 * would require changes to libc. Hopefully this is good enough. 57 */ 58 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 59 { 60 unsigned long retval = sys_brk(brk); 61 if (brk && brk != retval) 62 retval = -ENOMEM; 63 return retval; 64 } 65 66 /* 67 * This is pure guess-work.. 68 */ 69 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 70 unsigned long, text_len, unsigned long, bss_start, 71 unsigned long, bss_len) 72 { 73 struct mm_struct *mm; 74 75 mm = current->mm; 76 mm->end_code = bss_start + bss_len; 77 mm->start_brk = bss_start + bss_len; 78 mm->brk = bss_start + bss_len; 79 #if 0 80 printk("set_program_attributes(%lx %lx %lx %lx)\n", 81 text_start, text_len, bss_start, bss_len); 82 #endif 83 return 0; 84 } 85 86 /* 87 * OSF/1 directory handling functions... 88 * 89 * The "getdents()" interface is much more sane: the "basep" stuff is 90 * braindamage (it can't really handle filesystems where the directory 91 * offset differences aren't the same as "d_reclen"). 92 */ 93 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 94 95 struct osf_dirent { 96 unsigned int d_ino; 97 unsigned short d_reclen; 98 unsigned short d_namlen; 99 char d_name[1]; 100 }; 101 102 struct osf_dirent_callback { 103 struct dir_context ctx; 104 struct osf_dirent __user *dirent; 105 long __user *basep; 106 unsigned int count; 107 int error; 108 }; 109 110 static int 111 osf_filldir(struct dir_context *ctx, const char *name, int namlen, 112 loff_t offset, u64 ino, unsigned int d_type) 113 { 114 struct osf_dirent __user *dirent; 115 struct osf_dirent_callback *buf = 116 container_of(ctx, struct osf_dirent_callback, ctx); 117 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 118 unsigned int d_ino; 119 120 buf->error = -EINVAL; /* only used if we fail */ 121 if (reclen > buf->count) 122 return -EINVAL; 123 d_ino = ino; 124 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 125 buf->error = -EOVERFLOW; 126 return -EOVERFLOW; 127 } 128 if (buf->basep) { 129 if (put_user(offset, buf->basep)) 130 goto Efault; 131 buf->basep = NULL; 132 } 133 dirent = buf->dirent; 134 if (put_user(d_ino, &dirent->d_ino) || 135 put_user(namlen, &dirent->d_namlen) || 136 put_user(reclen, &dirent->d_reclen) || 137 copy_to_user(dirent->d_name, name, namlen) || 138 put_user(0, dirent->d_name + namlen)) 139 goto Efault; 140 dirent = (void __user *)dirent + reclen; 141 buf->dirent = dirent; 142 buf->count -= reclen; 143 return 0; 144 Efault: 145 buf->error = -EFAULT; 146 return -EFAULT; 147 } 148 149 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 150 struct osf_dirent __user *, dirent, unsigned int, count, 151 long __user *, basep) 152 { 153 int error; 154 struct fd arg = fdget_pos(fd); 155 struct osf_dirent_callback buf = { 156 .ctx.actor = osf_filldir, 157 .dirent = dirent, 158 .basep = basep, 159 .count = count 160 }; 161 162 if (!arg.file) 163 return -EBADF; 164 165 error = iterate_dir(arg.file, &buf.ctx); 166 if (error >= 0) 167 error = buf.error; 168 if (count != buf.count) 169 error = count - buf.count; 170 171 fdput_pos(arg); 172 return error; 173 } 174 175 #undef NAME_OFFSET 176 177 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 178 unsigned long, prot, unsigned long, flags, unsigned long, fd, 179 unsigned long, off) 180 { 181 unsigned long ret = -EINVAL; 182 183 #if 0 184 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 185 printk("%s: unimplemented OSF mmap flags %04lx\n", 186 current->comm, flags); 187 #endif 188 if ((off + PAGE_ALIGN(len)) < off) 189 goto out; 190 if (off & ~PAGE_MASK) 191 goto out; 192 ret = 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("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 softare 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 softare 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(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 asmlinkage long sys_ni_posix_timers(void); 1017 1018 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 1019 struct timeval32 __user *, tvs) 1020 { 1021 struct timespec64 tv[2]; 1022 1023 if (tvs) { 1024 if (get_tv32(&tv[0], &tvs[0]) || 1025 get_tv32(&tv[1], &tvs[1])) 1026 return -EFAULT; 1027 1028 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 || 1029 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000) 1030 return -EINVAL; 1031 } 1032 1033 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 1034 } 1035 1036 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 1037 fd_set __user *, exp, struct timeval32 __user *, tvp) 1038 { 1039 struct timespec64 end_time, *to = NULL; 1040 if (tvp) { 1041 struct timespec64 tv; 1042 to = &end_time; 1043 1044 if (get_tv32(&tv, tvp)) 1045 return -EFAULT; 1046 1047 if (tv.tv_sec < 0 || tv.tv_nsec < 0) 1048 return -EINVAL; 1049 1050 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec)) 1051 return -EINVAL; 1052 1053 } 1054 1055 /* OSF does not copy back the remaining time. */ 1056 return core_sys_select(n, inp, outp, exp, to); 1057 } 1058 1059 struct rusage32 { 1060 struct timeval32 ru_utime; /* user time used */ 1061 struct timeval32 ru_stime; /* system time used */ 1062 long ru_maxrss; /* maximum resident set size */ 1063 long ru_ixrss; /* integral shared memory size */ 1064 long ru_idrss; /* integral unshared data size */ 1065 long ru_isrss; /* integral unshared stack size */ 1066 long ru_minflt; /* page reclaims */ 1067 long ru_majflt; /* page faults */ 1068 long ru_nswap; /* swaps */ 1069 long ru_inblock; /* block input operations */ 1070 long ru_oublock; /* block output operations */ 1071 long ru_msgsnd; /* messages sent */ 1072 long ru_msgrcv; /* messages received */ 1073 long ru_nsignals; /* signals received */ 1074 long ru_nvcsw; /* voluntary context switches */ 1075 long ru_nivcsw; /* involuntary " */ 1076 }; 1077 1078 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 1079 { 1080 struct rusage32 r; 1081 u64 utime, stime; 1082 unsigned long utime_jiffies, stime_jiffies; 1083 1084 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1085 return -EINVAL; 1086 1087 memset(&r, 0, sizeof(r)); 1088 switch (who) { 1089 case RUSAGE_SELF: 1090 task_cputime(current, &utime, &stime); 1091 utime_jiffies = nsecs_to_jiffies(utime); 1092 stime_jiffies = nsecs_to_jiffies(stime); 1093 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1094 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1095 r.ru_minflt = current->min_flt; 1096 r.ru_majflt = current->maj_flt; 1097 break; 1098 case RUSAGE_CHILDREN: 1099 utime_jiffies = nsecs_to_jiffies(current->signal->cutime); 1100 stime_jiffies = nsecs_to_jiffies(current->signal->cstime); 1101 jiffies_to_timeval32(utime_jiffies, &r.ru_utime); 1102 jiffies_to_timeval32(stime_jiffies, &r.ru_stime); 1103 r.ru_minflt = current->signal->cmin_flt; 1104 r.ru_majflt = current->signal->cmaj_flt; 1105 break; 1106 } 1107 1108 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1109 } 1110 1111 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1112 struct rusage32 __user *, ur) 1113 { 1114 struct rusage r; 1115 long err = kernel_wait4(pid, ustatus, options, &r); 1116 if (err <= 0) 1117 return err; 1118 if (!ur) 1119 return err; 1120 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime)) 1121 return -EFAULT; 1122 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime)) 1123 return -EFAULT; 1124 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss, 1125 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss))) 1126 return -EFAULT; 1127 return err; 1128 } 1129 1130 /* 1131 * I don't know what the parameters are: the first one 1132 * seems to be a timeval pointer, and I suspect the second 1133 * one is the time remaining.. Ho humm.. No documentation. 1134 */ 1135 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1136 struct timeval32 __user *, remain) 1137 { 1138 struct timespec64 tmp; 1139 unsigned long ticks; 1140 1141 if (get_tv32(&tmp, sleep)) 1142 goto fault; 1143 1144 ticks = timespec64_to_jiffies(&tmp); 1145 1146 ticks = schedule_timeout_interruptible(ticks); 1147 1148 if (remain) { 1149 jiffies_to_timespec64(ticks, &tmp); 1150 if (put_tv32(remain, &tmp)) 1151 goto fault; 1152 } 1153 1154 return 0; 1155 fault: 1156 return -EFAULT; 1157 } 1158 1159 1160 struct timex32 { 1161 unsigned int modes; /* mode selector */ 1162 long offset; /* time offset (usec) */ 1163 long freq; /* frequency offset (scaled ppm) */ 1164 long maxerror; /* maximum error (usec) */ 1165 long esterror; /* estimated error (usec) */ 1166 int status; /* clock command/status */ 1167 long constant; /* pll time constant */ 1168 long precision; /* clock precision (usec) (read only) */ 1169 long tolerance; /* clock frequency tolerance (ppm) 1170 * (read only) 1171 */ 1172 struct timeval32 time; /* (read only) */ 1173 long tick; /* (modified) usecs between clock ticks */ 1174 1175 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1176 long jitter; /* pps jitter (us) (ro) */ 1177 int shift; /* interval duration (s) (shift) (ro) */ 1178 long stabil; /* pps stability (scaled ppm) (ro) */ 1179 long jitcnt; /* jitter limit exceeded (ro) */ 1180 long calcnt; /* calibration intervals (ro) */ 1181 long errcnt; /* calibration errors (ro) */ 1182 long stbcnt; /* stability limit exceeded (ro) */ 1183 1184 int :32; int :32; int :32; int :32; 1185 int :32; int :32; int :32; int :32; 1186 int :32; int :32; int :32; int :32; 1187 }; 1188 1189 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1190 { 1191 struct __kernel_timex txc; 1192 int ret; 1193 1194 /* copy relevant bits of struct timex. */ 1195 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1196 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1197 offsetof(struct timex32, tick))) 1198 return -EFAULT; 1199 1200 ret = do_adjtimex(&txc); 1201 if (ret < 0) 1202 return ret; 1203 1204 /* copy back to timex32 */ 1205 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1206 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1207 offsetof(struct timex32, tick))) || 1208 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) || 1209 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec))) 1210 return -EFAULT; 1211 1212 return ret; 1213 } 1214 1215 /* Get an address range which is currently unmapped. Similar to the 1216 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1217 1218 static unsigned long 1219 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1220 unsigned long limit) 1221 { 1222 struct vm_unmapped_area_info info; 1223 1224 info.flags = 0; 1225 info.length = len; 1226 info.low_limit = addr; 1227 info.high_limit = limit; 1228 info.align_mask = 0; 1229 info.align_offset = 0; 1230 return vm_unmapped_area(&info); 1231 } 1232 1233 unsigned long 1234 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1235 unsigned long len, unsigned long pgoff, 1236 unsigned long flags) 1237 { 1238 unsigned long limit; 1239 1240 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1241 if (current->personality & ADDR_LIMIT_32BIT) 1242 limit = 0x80000000; 1243 else 1244 limit = TASK_SIZE; 1245 1246 if (len > limit) 1247 return -ENOMEM; 1248 1249 if (flags & MAP_FIXED) 1250 return addr; 1251 1252 /* First, see if the given suggestion fits. 1253 1254 The OSF/1 loader (/sbin/loader) relies on us returning an 1255 address larger than the requested if one exists, which is 1256 a terribly broken way to program. 1257 1258 That said, I can see the use in being able to suggest not 1259 merely specific addresses, but regions of memory -- perhaps 1260 this feature should be incorporated into all ports? */ 1261 1262 if (addr) { 1263 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1264 if (addr != (unsigned long) -ENOMEM) 1265 return addr; 1266 } 1267 1268 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1269 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1270 len, limit); 1271 if (addr != (unsigned long) -ENOMEM) 1272 return addr; 1273 1274 /* Finally, try allocating in low memory. */ 1275 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1276 1277 return addr; 1278 } 1279 1280 #ifdef CONFIG_OSF4_COMPAT 1281 /* Clear top 32 bits of iov_len in the user's buffer for 1282 compatibility with old versions of OSF/1 where iov_len 1283 was defined as int. */ 1284 static int 1285 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1286 { 1287 unsigned long i; 1288 1289 for (i = 0 ; i < count ; i++) { 1290 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1291 1292 if (put_user(0, iov_len_high)) 1293 return -EFAULT; 1294 } 1295 return 0; 1296 } 1297 #endif 1298 1299 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1300 const struct iovec __user *, vector, unsigned long, count) 1301 { 1302 #ifdef CONFIG_OSF4_COMPAT 1303 if (unlikely(personality(current->personality) == PER_OSF4)) 1304 if (osf_fix_iov_len(vector, count)) 1305 return -EFAULT; 1306 #endif 1307 1308 return sys_readv(fd, vector, count); 1309 } 1310 1311 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1312 const struct iovec __user *, vector, unsigned long, count) 1313 { 1314 #ifdef CONFIG_OSF4_COMPAT 1315 if (unlikely(personality(current->personality) == PER_OSF4)) 1316 if (osf_fix_iov_len(vector, count)) 1317 return -EFAULT; 1318 #endif 1319 return sys_writev(fd, vector, count); 1320 } 1321 1322 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who) 1323 { 1324 int prio = sys_getpriority(which, who); 1325 if (prio >= 0) { 1326 /* Return value is the unbiased priority, i.e. 20 - prio. 1327 This does result in negative return values, so signal 1328 no error */ 1329 force_successful_syscall_return(); 1330 prio = 20 - prio; 1331 } 1332 return prio; 1333 } 1334 1335 SYSCALL_DEFINE0(getxuid) 1336 { 1337 current_pt_regs()->r20 = sys_geteuid(); 1338 return sys_getuid(); 1339 } 1340 1341 SYSCALL_DEFINE0(getxgid) 1342 { 1343 current_pt_regs()->r20 = sys_getegid(); 1344 return sys_getgid(); 1345 } 1346 1347 SYSCALL_DEFINE0(getxpid) 1348 { 1349 current_pt_regs()->r20 = sys_getppid(); 1350 return sys_getpid(); 1351 } 1352 1353 SYSCALL_DEFINE0(alpha_pipe) 1354 { 1355 int fd[2]; 1356 int res = do_pipe_flags(fd, 0); 1357 if (!res) { 1358 /* The return values are in $0 and $20. */ 1359 current_pt_regs()->r20 = fd[1]; 1360 res = fd[0]; 1361 } 1362 return res; 1363 } 1364 1365 SYSCALL_DEFINE1(sethae, unsigned long, val) 1366 { 1367 current_pt_regs()->hae = val; 1368 return 0; 1369 } 1370