1 /* 2 * linux/arch/alpha/kernel/osf_sys.c 3 * 4 * Copyright (C) 1995 Linus Torvalds 5 */ 6 7 /* 8 * This file handles some of the stranger OSF/1 system call interfaces. 9 * Some of the system calls expect a non-C calling standard, others have 10 * special parameter blocks.. 11 */ 12 13 #include <linux/errno.h> 14 #include <linux/sched.h> 15 #include <linux/kernel.h> 16 #include <linux/mm.h> 17 #include <linux/smp.h> 18 #include <linux/stddef.h> 19 #include <linux/syscalls.h> 20 #include <linux/unistd.h> 21 #include <linux/ptrace.h> 22 #include <linux/user.h> 23 #include <linux/utsname.h> 24 #include <linux/time.h> 25 #include <linux/timex.h> 26 #include <linux/major.h> 27 #include <linux/stat.h> 28 #include <linux/mman.h> 29 #include <linux/shm.h> 30 #include <linux/poll.h> 31 #include <linux/file.h> 32 #include <linux/types.h> 33 #include <linux/ipc.h> 34 #include <linux/namei.h> 35 #include <linux/uio.h> 36 #include <linux/vfs.h> 37 #include <linux/rcupdate.h> 38 #include <linux/slab.h> 39 40 #include <asm/fpu.h> 41 #include <asm/io.h> 42 #include <asm/uaccess.h> 43 #include <asm/system.h> 44 #include <asm/sysinfo.h> 45 #include <asm/hwrpb.h> 46 #include <asm/processor.h> 47 48 /* 49 * Brk needs to return an error. Still support Linux's brk(0) query idiom, 50 * which OSF programs just shouldn't be doing. We're still not quite 51 * identical to OSF as we don't return 0 on success, but doing otherwise 52 * would require changes to libc. Hopefully this is good enough. 53 */ 54 SYSCALL_DEFINE1(osf_brk, unsigned long, brk) 55 { 56 unsigned long retval = sys_brk(brk); 57 if (brk && brk != retval) 58 retval = -ENOMEM; 59 return retval; 60 } 61 62 /* 63 * This is pure guess-work.. 64 */ 65 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, 66 unsigned long, text_len, unsigned long, bss_start, 67 unsigned long, bss_len) 68 { 69 struct mm_struct *mm; 70 71 mm = current->mm; 72 mm->end_code = bss_start + bss_len; 73 mm->start_brk = bss_start + bss_len; 74 mm->brk = bss_start + bss_len; 75 #if 0 76 printk("set_program_attributes(%lx %lx %lx %lx)\n", 77 text_start, text_len, bss_start, bss_len); 78 #endif 79 return 0; 80 } 81 82 /* 83 * OSF/1 directory handling functions... 84 * 85 * The "getdents()" interface is much more sane: the "basep" stuff is 86 * braindamage (it can't really handle filesystems where the directory 87 * offset differences aren't the same as "d_reclen"). 88 */ 89 #define NAME_OFFSET offsetof (struct osf_dirent, d_name) 90 91 struct osf_dirent { 92 unsigned int d_ino; 93 unsigned short d_reclen; 94 unsigned short d_namlen; 95 char d_name[1]; 96 }; 97 98 struct osf_dirent_callback { 99 struct osf_dirent __user *dirent; 100 long __user *basep; 101 unsigned int count; 102 int error; 103 }; 104 105 static int 106 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 107 u64 ino, unsigned int d_type) 108 { 109 struct osf_dirent __user *dirent; 110 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 111 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 112 unsigned int d_ino; 113 114 buf->error = -EINVAL; /* only used if we fail */ 115 if (reclen > buf->count) 116 return -EINVAL; 117 d_ino = ino; 118 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 119 buf->error = -EOVERFLOW; 120 return -EOVERFLOW; 121 } 122 if (buf->basep) { 123 if (put_user(offset, buf->basep)) 124 goto Efault; 125 buf->basep = NULL; 126 } 127 dirent = buf->dirent; 128 if (put_user(d_ino, &dirent->d_ino) || 129 put_user(namlen, &dirent->d_namlen) || 130 put_user(reclen, &dirent->d_reclen) || 131 copy_to_user(dirent->d_name, name, namlen) || 132 put_user(0, dirent->d_name + namlen)) 133 goto Efault; 134 dirent = (void __user *)dirent + reclen; 135 buf->dirent = dirent; 136 buf->count -= reclen; 137 return 0; 138 Efault: 139 buf->error = -EFAULT; 140 return -EFAULT; 141 } 142 143 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 144 struct osf_dirent __user *, dirent, unsigned int, count, 145 long __user *, basep) 146 { 147 int error; 148 struct file *file; 149 struct osf_dirent_callback buf; 150 151 error = -EBADF; 152 file = fget(fd); 153 if (!file) 154 goto out; 155 156 buf.dirent = dirent; 157 buf.basep = basep; 158 buf.count = count; 159 buf.error = 0; 160 161 error = vfs_readdir(file, osf_filldir, &buf); 162 if (error >= 0) 163 error = buf.error; 164 if (count != buf.count) 165 error = count - buf.count; 166 167 fput(file); 168 out: 169 return error; 170 } 171 172 #undef NAME_OFFSET 173 174 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 175 unsigned long, prot, unsigned long, flags, unsigned long, fd, 176 unsigned long, off) 177 { 178 unsigned long ret = -EINVAL; 179 180 #if 0 181 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) 182 printk("%s: unimplemented OSF mmap flags %04lx\n", 183 current->comm, flags); 184 #endif 185 if ((off + PAGE_ALIGN(len)) < off) 186 goto out; 187 if (off & ~PAGE_MASK) 188 goto out; 189 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 190 out: 191 return ret; 192 } 193 194 195 /* 196 * The OSF/1 statfs structure is much larger, but this should 197 * match the beginning, at least. 198 */ 199 struct osf_statfs { 200 short f_type; 201 short f_flags; 202 int f_fsize; 203 int f_bsize; 204 int f_blocks; 205 int f_bfree; 206 int f_bavail; 207 int f_files; 208 int f_ffree; 209 __kernel_fsid_t f_fsid; 210 }; 211 212 static int 213 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 214 unsigned long bufsiz) 215 { 216 struct osf_statfs tmp_stat; 217 218 tmp_stat.f_type = linux_stat->f_type; 219 tmp_stat.f_flags = 0; /* mount flags */ 220 tmp_stat.f_fsize = linux_stat->f_frsize; 221 tmp_stat.f_bsize = linux_stat->f_bsize; 222 tmp_stat.f_blocks = linux_stat->f_blocks; 223 tmp_stat.f_bfree = linux_stat->f_bfree; 224 tmp_stat.f_bavail = linux_stat->f_bavail; 225 tmp_stat.f_files = linux_stat->f_files; 226 tmp_stat.f_ffree = linux_stat->f_ffree; 227 tmp_stat.f_fsid = linux_stat->f_fsid; 228 if (bufsiz > sizeof(tmp_stat)) 229 bufsiz = sizeof(tmp_stat); 230 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 231 } 232 233 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 234 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 235 { 236 struct kstatfs linux_stat; 237 int error = user_statfs(pathname, &linux_stat); 238 if (!error) 239 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 240 return error; 241 } 242 243 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 244 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 245 { 246 struct kstatfs linux_stat; 247 int error = fd_statfs(fd, &linux_stat); 248 if (!error) 249 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 250 return error; 251 } 252 253 /* 254 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 255 * 256 * Although to be frank, neither are the native Linux/i386 ones.. 257 */ 258 struct ufs_args { 259 char __user *devname; 260 int flags; 261 uid_t exroot; 262 }; 263 264 struct cdfs_args { 265 char __user *devname; 266 int flags; 267 uid_t exroot; 268 269 /* This has lots more here, which Linux handles with the option block 270 but I'm too lazy to do the translation into ASCII. */ 271 }; 272 273 struct procfs_args { 274 char __user *devname; 275 int flags; 276 uid_t exroot; 277 }; 278 279 /* 280 * We can't actually handle ufs yet, so we translate UFS mounts to 281 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 282 * layout is so braindead it's a major headache doing it. 283 * 284 * Just how long ago was it written? OTOH our UFS driver may be still 285 * unhappy with OSF UFS. [CHECKME] 286 */ 287 static int 288 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 289 { 290 int retval; 291 struct cdfs_args tmp; 292 char *devname; 293 294 retval = -EFAULT; 295 if (copy_from_user(&tmp, args, sizeof(tmp))) 296 goto out; 297 devname = getname(tmp.devname); 298 retval = PTR_ERR(devname); 299 if (IS_ERR(devname)) 300 goto out; 301 retval = do_mount(devname, dirname, "ext2", flags, NULL); 302 putname(devname); 303 out: 304 return retval; 305 } 306 307 static int 308 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 309 { 310 int retval; 311 struct cdfs_args tmp; 312 char *devname; 313 314 retval = -EFAULT; 315 if (copy_from_user(&tmp, args, sizeof(tmp))) 316 goto out; 317 devname = getname(tmp.devname); 318 retval = PTR_ERR(devname); 319 if (IS_ERR(devname)) 320 goto out; 321 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 322 putname(devname); 323 out: 324 return retval; 325 } 326 327 static int 328 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 329 { 330 struct procfs_args tmp; 331 332 if (copy_from_user(&tmp, args, sizeof(tmp))) 333 return -EFAULT; 334 335 return do_mount("", dirname, "proc", flags, NULL); 336 } 337 338 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 339 int, flag, void __user *, data) 340 { 341 int retval; 342 char *name; 343 344 name = getname(path); 345 retval = PTR_ERR(name); 346 if (IS_ERR(name)) 347 goto out; 348 switch (typenr) { 349 case 1: 350 retval = osf_ufs_mount(name, data, flag); 351 break; 352 case 6: 353 retval = osf_cdfs_mount(name, data, flag); 354 break; 355 case 9: 356 retval = osf_procfs_mount(name, data, flag); 357 break; 358 default: 359 retval = -EINVAL; 360 printk("osf_mount(%ld, %x)\n", typenr, flag); 361 } 362 putname(name); 363 out: 364 return retval; 365 } 366 367 SYSCALL_DEFINE1(osf_utsname, char __user *, name) 368 { 369 int error; 370 371 down_read(&uts_sem); 372 error = -EFAULT; 373 if (copy_to_user(name + 0, utsname()->sysname, 32)) 374 goto out; 375 if (copy_to_user(name + 32, utsname()->nodename, 32)) 376 goto out; 377 if (copy_to_user(name + 64, utsname()->release, 32)) 378 goto out; 379 if (copy_to_user(name + 96, utsname()->version, 32)) 380 goto out; 381 if (copy_to_user(name + 128, utsname()->machine, 32)) 382 goto out; 383 384 error = 0; 385 out: 386 up_read(&uts_sem); 387 return error; 388 } 389 390 SYSCALL_DEFINE0(getpagesize) 391 { 392 return PAGE_SIZE; 393 } 394 395 SYSCALL_DEFINE0(getdtablesize) 396 { 397 return sysctl_nr_open; 398 } 399 400 /* 401 * For compatibility with OSF/1 only. Use utsname(2) instead. 402 */ 403 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 404 { 405 unsigned len; 406 int i; 407 408 if (!access_ok(VERIFY_WRITE, name, namelen)) 409 return -EFAULT; 410 411 len = namelen; 412 if (namelen > 32) 413 len = 32; 414 415 down_read(&uts_sem); 416 for (i = 0; i < len; ++i) { 417 __put_user(utsname()->domainname[i], name + i); 418 if (utsname()->domainname[i] == '\0') 419 break; 420 } 421 up_read(&uts_sem); 422 423 return 0; 424 } 425 426 /* 427 * The following stuff should move into a header file should it ever 428 * be labeled "officially supported." Right now, there is just enough 429 * support to avoid applications (such as tar) printing error 430 * messages. The attributes are not really implemented. 431 */ 432 433 /* 434 * Values for Property list entry flag 435 */ 436 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 437 by default */ 438 #define PLE_FLAG_MASK 0x1 /* Valid flag values */ 439 #define PLE_FLAG_ALL -1 /* All flag value */ 440 441 struct proplistname_args { 442 unsigned int pl_mask; 443 unsigned int pl_numnames; 444 char **pl_names; 445 }; 446 447 union pl_args { 448 struct setargs { 449 char __user *path; 450 long follow; 451 long nbytes; 452 char __user *buf; 453 } set; 454 struct fsetargs { 455 long fd; 456 long nbytes; 457 char __user *buf; 458 } fset; 459 struct getargs { 460 char __user *path; 461 long follow; 462 struct proplistname_args __user *name_args; 463 long nbytes; 464 char __user *buf; 465 int __user *min_buf_size; 466 } get; 467 struct fgetargs { 468 long fd; 469 struct proplistname_args __user *name_args; 470 long nbytes; 471 char __user *buf; 472 int __user *min_buf_size; 473 } fget; 474 struct delargs { 475 char __user *path; 476 long follow; 477 struct proplistname_args __user *name_args; 478 } del; 479 struct fdelargs { 480 long fd; 481 struct proplistname_args __user *name_args; 482 } fdel; 483 }; 484 485 enum pl_code { 486 PL_SET = 1, PL_FSET = 2, 487 PL_GET = 3, PL_FGET = 4, 488 PL_DEL = 5, PL_FDEL = 6 489 }; 490 491 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 492 union pl_args __user *, args) 493 { 494 long error; 495 int __user *min_buf_size_ptr; 496 497 switch (code) { 498 case PL_SET: 499 if (get_user(error, &args->set.nbytes)) 500 error = -EFAULT; 501 break; 502 case PL_FSET: 503 if (get_user(error, &args->fset.nbytes)) 504 error = -EFAULT; 505 break; 506 case PL_GET: 507 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 508 if (error) 509 break; 510 error = put_user(0, min_buf_size_ptr); 511 break; 512 case PL_FGET: 513 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 514 if (error) 515 break; 516 error = put_user(0, min_buf_size_ptr); 517 break; 518 case PL_DEL: 519 case PL_FDEL: 520 error = 0; 521 break; 522 default: 523 error = -EOPNOTSUPP; 524 break; 525 }; 526 return error; 527 } 528 529 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 530 struct sigstack __user *, uoss) 531 { 532 unsigned long usp = rdusp(); 533 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 534 unsigned long oss_os = on_sig_stack(usp); 535 int error; 536 537 if (uss) { 538 void __user *ss_sp; 539 540 error = -EFAULT; 541 if (get_user(ss_sp, &uss->ss_sp)) 542 goto out; 543 544 /* If the current stack was set with sigaltstack, don't 545 swap stacks while we are on it. */ 546 error = -EPERM; 547 if (current->sas_ss_sp && on_sig_stack(usp)) 548 goto out; 549 550 /* Since we don't know the extent of the stack, and we don't 551 track onstack-ness, but rather calculate it, we must 552 presume a size. Ho hum this interface is lossy. */ 553 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 554 current->sas_ss_size = SIGSTKSZ; 555 } 556 557 if (uoss) { 558 error = -EFAULT; 559 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 560 || __put_user(oss_sp, &uoss->ss_sp) 561 || __put_user(oss_os, &uoss->ss_onstack)) 562 goto out; 563 } 564 565 error = 0; 566 out: 567 return error; 568 } 569 570 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 571 { 572 const char *sysinfo_table[] = { 573 utsname()->sysname, 574 utsname()->nodename, 575 utsname()->release, 576 utsname()->version, 577 utsname()->machine, 578 "alpha", /* instruction set architecture */ 579 "dummy", /* hardware serial number */ 580 "dummy", /* hardware manufacturer */ 581 "dummy", /* secure RPC domain */ 582 }; 583 unsigned long offset; 584 const char *res; 585 long len, err = -EINVAL; 586 587 offset = command-1; 588 if (offset >= ARRAY_SIZE(sysinfo_table)) { 589 /* Digital UNIX has a few unpublished interfaces here */ 590 printk("sysinfo(%d)", command); 591 goto out; 592 } 593 594 down_read(&uts_sem); 595 res = sysinfo_table[offset]; 596 len = strlen(res)+1; 597 if (len > count) 598 len = count; 599 if (copy_to_user(buf, res, len)) 600 err = -EFAULT; 601 else 602 err = 0; 603 up_read(&uts_sem); 604 out: 605 return err; 606 } 607 608 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 609 unsigned long, nbytes, int __user *, start, void __user *, arg) 610 { 611 unsigned long w; 612 struct percpu_struct *cpu; 613 614 switch (op) { 615 case GSI_IEEE_FP_CONTROL: 616 /* Return current software fp control & status bits. */ 617 /* Note that DU doesn't verify available space here. */ 618 619 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 620 w = swcr_update_status(w, rdfpcr()); 621 if (put_user(w, (unsigned long __user *) buffer)) 622 return -EFAULT; 623 return 0; 624 625 case GSI_IEEE_STATE_AT_SIGNAL: 626 /* 627 * Not sure anybody will ever use this weird stuff. These 628 * ops can be used (under OSF/1) to set the fpcr that should 629 * be used when a signal handler starts executing. 630 */ 631 break; 632 633 case GSI_UACPROC: 634 if (nbytes < sizeof(unsigned int)) 635 return -EINVAL; 636 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 637 if (put_user(w, (unsigned int __user *)buffer)) 638 return -EFAULT; 639 return 1; 640 641 case GSI_PROC_TYPE: 642 if (nbytes < sizeof(unsigned long)) 643 return -EINVAL; 644 cpu = (struct percpu_struct*) 645 ((char*)hwrpb + hwrpb->processor_offset); 646 w = cpu->type; 647 if (put_user(w, (unsigned long __user*)buffer)) 648 return -EFAULT; 649 return 1; 650 651 case GSI_GET_HWRPB: 652 if (nbytes < sizeof(*hwrpb)) 653 return -EINVAL; 654 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 655 return -EFAULT; 656 return 1; 657 658 default: 659 break; 660 } 661 662 return -EOPNOTSUPP; 663 } 664 665 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 666 unsigned long, nbytes, int __user *, start, void __user *, arg) 667 { 668 switch (op) { 669 case SSI_IEEE_FP_CONTROL: { 670 unsigned long swcr, fpcr; 671 unsigned int *state; 672 673 /* 674 * Alpha Architecture Handbook 4.7.7.3: 675 * To be fully IEEE compiant, we must track the current IEEE 676 * exception state in software, because spurious bits can be 677 * set in the trap shadow of a software-complete insn. 678 */ 679 680 if (get_user(swcr, (unsigned long __user *)buffer)) 681 return -EFAULT; 682 state = ¤t_thread_info()->ieee_state; 683 684 /* Update softare trap enable bits. */ 685 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 686 687 /* Update the real fpcr. */ 688 fpcr = rdfpcr() & FPCR_DYN_MASK; 689 fpcr |= ieee_swcr_to_fpcr(swcr); 690 wrfpcr(fpcr); 691 692 return 0; 693 } 694 695 case SSI_IEEE_RAISE_EXCEPTION: { 696 unsigned long exc, swcr, fpcr, fex; 697 unsigned int *state; 698 699 if (get_user(exc, (unsigned long __user *)buffer)) 700 return -EFAULT; 701 state = ¤t_thread_info()->ieee_state; 702 exc &= IEEE_STATUS_MASK; 703 704 /* Update softare trap enable bits. */ 705 swcr = (*state & IEEE_SW_MASK) | exc; 706 *state |= exc; 707 708 /* Update the real fpcr. */ 709 fpcr = rdfpcr(); 710 fpcr |= ieee_swcr_to_fpcr(swcr); 711 wrfpcr(fpcr); 712 713 /* If any exceptions set by this call, and are unmasked, 714 send a signal. Old exceptions are not signaled. */ 715 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 716 if (fex) { 717 siginfo_t info; 718 int si_code = 0; 719 720 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 721 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 722 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 723 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 724 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 725 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 726 727 info.si_signo = SIGFPE; 728 info.si_errno = 0; 729 info.si_code = si_code; 730 info.si_addr = NULL; /* FIXME */ 731 send_sig_info(SIGFPE, &info, current); 732 } 733 return 0; 734 } 735 736 case SSI_IEEE_STATE_AT_SIGNAL: 737 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 738 /* 739 * Not sure anybody will ever use this weird stuff. These 740 * ops can be used (under OSF/1) to set the fpcr that should 741 * be used when a signal handler starts executing. 742 */ 743 break; 744 745 case SSI_NVPAIRS: { 746 unsigned long v, w, i; 747 unsigned int old, new; 748 749 for (i = 0; i < nbytes; ++i) { 750 751 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 752 return -EFAULT; 753 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 754 return -EFAULT; 755 switch (v) { 756 case SSIN_UACPROC: 757 again: 758 old = current_thread_info()->flags; 759 new = old & ~(UAC_BITMASK << UAC_SHIFT); 760 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 761 if (cmpxchg(¤t_thread_info()->flags, 762 old, new) != old) 763 goto again; 764 break; 765 766 default: 767 return -EOPNOTSUPP; 768 } 769 } 770 return 0; 771 } 772 773 default: 774 break; 775 } 776 777 return -EOPNOTSUPP; 778 } 779 780 /* Translations due to the fact that OSF's time_t is an int. Which 781 affects all sorts of things, like timeval and itimerval. */ 782 783 extern struct timezone sys_tz; 784 785 struct timeval32 786 { 787 int tv_sec, tv_usec; 788 }; 789 790 struct itimerval32 791 { 792 struct timeval32 it_interval; 793 struct timeval32 it_value; 794 }; 795 796 static inline long 797 get_tv32(struct timeval *o, struct timeval32 __user *i) 798 { 799 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 800 (__get_user(o->tv_sec, &i->tv_sec) | 801 __get_user(o->tv_usec, &i->tv_usec))); 802 } 803 804 static inline long 805 put_tv32(struct timeval32 __user *o, struct timeval *i) 806 { 807 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 808 (__put_user(i->tv_sec, &o->tv_sec) | 809 __put_user(i->tv_usec, &o->tv_usec))); 810 } 811 812 static inline long 813 get_it32(struct itimerval *o, struct itimerval32 __user *i) 814 { 815 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 816 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 817 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 818 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 819 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 820 } 821 822 static inline long 823 put_it32(struct itimerval32 __user *o, struct itimerval *i) 824 { 825 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 826 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 827 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 828 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 829 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 830 } 831 832 static inline void 833 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 834 { 835 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 836 value->tv_sec = jiffies / HZ; 837 } 838 839 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 840 struct timezone __user *, tz) 841 { 842 if (tv) { 843 struct timeval ktv; 844 do_gettimeofday(&ktv); 845 if (put_tv32(tv, &ktv)) 846 return -EFAULT; 847 } 848 if (tz) { 849 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 850 return -EFAULT; 851 } 852 return 0; 853 } 854 855 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 856 struct timezone __user *, tz) 857 { 858 struct timespec kts; 859 struct timezone ktz; 860 861 if (tv) { 862 if (get_tv32((struct timeval *)&kts, tv)) 863 return -EFAULT; 864 } 865 if (tz) { 866 if (copy_from_user(&ktz, tz, sizeof(*tz))) 867 return -EFAULT; 868 } 869 870 kts.tv_nsec *= 1000; 871 872 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 873 } 874 875 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 876 { 877 struct itimerval kit; 878 int error; 879 880 error = do_getitimer(which, &kit); 881 if (!error && put_it32(it, &kit)) 882 error = -EFAULT; 883 884 return error; 885 } 886 887 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 888 struct itimerval32 __user *, out) 889 { 890 struct itimerval kin, kout; 891 int error; 892 893 if (in) { 894 if (get_it32(&kin, in)) 895 return -EFAULT; 896 } else 897 memset(&kin, 0, sizeof(kin)); 898 899 error = do_setitimer(which, &kin, out ? &kout : NULL); 900 if (error || !out) 901 return error; 902 903 if (put_it32(out, &kout)) 904 return -EFAULT; 905 906 return 0; 907 908 } 909 910 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 911 struct timeval32 __user *, tvs) 912 { 913 struct timespec tv[2]; 914 915 if (tvs) { 916 struct timeval ktvs[2]; 917 if (get_tv32(&ktvs[0], &tvs[0]) || 918 get_tv32(&ktvs[1], &tvs[1])) 919 return -EFAULT; 920 921 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 922 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 923 return -EINVAL; 924 925 tv[0].tv_sec = ktvs[0].tv_sec; 926 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 927 tv[1].tv_sec = ktvs[1].tv_sec; 928 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 929 } 930 931 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 932 } 933 934 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 935 fd_set __user *, exp, struct timeval32 __user *, tvp) 936 { 937 struct timespec end_time, *to = NULL; 938 if (tvp) { 939 time_t sec, usec; 940 941 to = &end_time; 942 943 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 944 || __get_user(sec, &tvp->tv_sec) 945 || __get_user(usec, &tvp->tv_usec)) { 946 return -EFAULT; 947 } 948 949 if (sec < 0 || usec < 0) 950 return -EINVAL; 951 952 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 953 return -EINVAL; 954 955 } 956 957 /* OSF does not copy back the remaining time. */ 958 return core_sys_select(n, inp, outp, exp, to); 959 } 960 961 struct rusage32 { 962 struct timeval32 ru_utime; /* user time used */ 963 struct timeval32 ru_stime; /* system time used */ 964 long ru_maxrss; /* maximum resident set size */ 965 long ru_ixrss; /* integral shared memory size */ 966 long ru_idrss; /* integral unshared data size */ 967 long ru_isrss; /* integral unshared stack size */ 968 long ru_minflt; /* page reclaims */ 969 long ru_majflt; /* page faults */ 970 long ru_nswap; /* swaps */ 971 long ru_inblock; /* block input operations */ 972 long ru_oublock; /* block output operations */ 973 long ru_msgsnd; /* messages sent */ 974 long ru_msgrcv; /* messages received */ 975 long ru_nsignals; /* signals received */ 976 long ru_nvcsw; /* voluntary context switches */ 977 long ru_nivcsw; /* involuntary " */ 978 }; 979 980 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 981 { 982 struct rusage32 r; 983 984 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 985 return -EINVAL; 986 987 memset(&r, 0, sizeof(r)); 988 switch (who) { 989 case RUSAGE_SELF: 990 jiffies_to_timeval32(current->utime, &r.ru_utime); 991 jiffies_to_timeval32(current->stime, &r.ru_stime); 992 r.ru_minflt = current->min_flt; 993 r.ru_majflt = current->maj_flt; 994 break; 995 case RUSAGE_CHILDREN: 996 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 997 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 998 r.ru_minflt = current->signal->cmin_flt; 999 r.ru_majflt = current->signal->cmaj_flt; 1000 break; 1001 } 1002 1003 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1004 } 1005 1006 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1007 struct rusage32 __user *, ur) 1008 { 1009 struct rusage r; 1010 long ret, err; 1011 mm_segment_t old_fs; 1012 1013 if (!ur) 1014 return sys_wait4(pid, ustatus, options, NULL); 1015 1016 old_fs = get_fs(); 1017 1018 set_fs (KERNEL_DS); 1019 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1020 set_fs (old_fs); 1021 1022 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1023 return -EFAULT; 1024 1025 err = 0; 1026 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1027 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1028 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1029 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1030 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1031 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1032 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1033 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1034 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1035 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1036 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1037 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1038 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1039 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1040 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1041 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1042 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1043 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1044 1045 return err ? err : ret; 1046 } 1047 1048 /* 1049 * I don't know what the parameters are: the first one 1050 * seems to be a timeval pointer, and I suspect the second 1051 * one is the time remaining.. Ho humm.. No documentation. 1052 */ 1053 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1054 struct timeval32 __user *, remain) 1055 { 1056 struct timeval tmp; 1057 unsigned long ticks; 1058 1059 if (get_tv32(&tmp, sleep)) 1060 goto fault; 1061 1062 ticks = timeval_to_jiffies(&tmp); 1063 1064 ticks = schedule_timeout_interruptible(ticks); 1065 1066 if (remain) { 1067 jiffies_to_timeval(ticks, &tmp); 1068 if (put_tv32(remain, &tmp)) 1069 goto fault; 1070 } 1071 1072 return 0; 1073 fault: 1074 return -EFAULT; 1075 } 1076 1077 1078 struct timex32 { 1079 unsigned int modes; /* mode selector */ 1080 long offset; /* time offset (usec) */ 1081 long freq; /* frequency offset (scaled ppm) */ 1082 long maxerror; /* maximum error (usec) */ 1083 long esterror; /* estimated error (usec) */ 1084 int status; /* clock command/status */ 1085 long constant; /* pll time constant */ 1086 long precision; /* clock precision (usec) (read only) */ 1087 long tolerance; /* clock frequency tolerance (ppm) 1088 * (read only) 1089 */ 1090 struct timeval32 time; /* (read only) */ 1091 long tick; /* (modified) usecs between clock ticks */ 1092 1093 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1094 long jitter; /* pps jitter (us) (ro) */ 1095 int shift; /* interval duration (s) (shift) (ro) */ 1096 long stabil; /* pps stability (scaled ppm) (ro) */ 1097 long jitcnt; /* jitter limit exceeded (ro) */ 1098 long calcnt; /* calibration intervals (ro) */ 1099 long errcnt; /* calibration errors (ro) */ 1100 long stbcnt; /* stability limit exceeded (ro) */ 1101 1102 int :32; int :32; int :32; int :32; 1103 int :32; int :32; int :32; int :32; 1104 int :32; int :32; int :32; int :32; 1105 }; 1106 1107 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1108 { 1109 struct timex txc; 1110 int ret; 1111 1112 /* copy relevant bits of struct timex. */ 1113 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1114 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1115 offsetof(struct timex32, time))) 1116 return -EFAULT; 1117 1118 ret = do_adjtimex(&txc); 1119 if (ret < 0) 1120 return ret; 1121 1122 /* copy back to timex32 */ 1123 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1124 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1125 offsetof(struct timex32, tick))) || 1126 (put_tv32(&txc_p->time, &txc.time))) 1127 return -EFAULT; 1128 1129 return ret; 1130 } 1131 1132 /* Get an address range which is currently unmapped. Similar to the 1133 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1134 1135 static unsigned long 1136 arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1137 unsigned long limit) 1138 { 1139 struct vm_area_struct *vma = find_vma(current->mm, addr); 1140 1141 while (1) { 1142 /* At this point: (!vma || addr < vma->vm_end). */ 1143 if (limit - len < addr) 1144 return -ENOMEM; 1145 if (!vma || addr + len <= vma->vm_start) 1146 return addr; 1147 addr = vma->vm_end; 1148 vma = vma->vm_next; 1149 } 1150 } 1151 1152 unsigned long 1153 arch_get_unmapped_area(struct file *filp, unsigned long addr, 1154 unsigned long len, unsigned long pgoff, 1155 unsigned long flags) 1156 { 1157 unsigned long limit; 1158 1159 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1160 if (current->personality & ADDR_LIMIT_32BIT) 1161 limit = 0x80000000; 1162 else 1163 limit = TASK_SIZE; 1164 1165 if (len > limit) 1166 return -ENOMEM; 1167 1168 if (flags & MAP_FIXED) 1169 return addr; 1170 1171 /* First, see if the given suggestion fits. 1172 1173 The OSF/1 loader (/sbin/loader) relies on us returning an 1174 address larger than the requested if one exists, which is 1175 a terribly broken way to program. 1176 1177 That said, I can see the use in being able to suggest not 1178 merely specific addresses, but regions of memory -- perhaps 1179 this feature should be incorporated into all ports? */ 1180 1181 if (addr) { 1182 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1183 if (addr != (unsigned long) -ENOMEM) 1184 return addr; 1185 } 1186 1187 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1188 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1189 len, limit); 1190 if (addr != (unsigned long) -ENOMEM) 1191 return addr; 1192 1193 /* Finally, try allocating in low memory. */ 1194 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1195 1196 return addr; 1197 } 1198 1199 #ifdef CONFIG_OSF4_COMPAT 1200 1201 /* Clear top 32 bits of iov_len in the user's buffer for 1202 compatibility with old versions of OSF/1 where iov_len 1203 was defined as int. */ 1204 static int 1205 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1206 { 1207 unsigned long i; 1208 1209 for (i = 0 ; i < count ; i++) { 1210 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1211 1212 if (put_user(0, iov_len_high)) 1213 return -EFAULT; 1214 } 1215 return 0; 1216 } 1217 1218 SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1219 const struct iovec __user *, vector, unsigned long, count) 1220 { 1221 if (unlikely(personality(current->personality) == PER_OSF4)) 1222 if (osf_fix_iov_len(vector, count)) 1223 return -EFAULT; 1224 return sys_readv(fd, vector, count); 1225 } 1226 1227 SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1228 const struct iovec __user *, vector, unsigned long, count) 1229 { 1230 if (unlikely(personality(current->personality) == PER_OSF4)) 1231 if (osf_fix_iov_len(vector, count)) 1232 return -EFAULT; 1233 return sys_writev(fd, vector, count); 1234 } 1235 1236 #endif 1237