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 */ 54SYSCALL_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 */ 65SYSCALL_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 return 0; 76} 77 78/* 79 * OSF/1 directory handling functions... 80 * 81 * The "getdents()" interface is much more sane: the "basep" stuff is 82 * braindamage (it can't really handle filesystems where the directory 83 * offset differences aren't the same as "d_reclen"). 84 */ 85#define NAME_OFFSET offsetof (struct osf_dirent, d_name) 86 87struct osf_dirent { 88 unsigned int d_ino; 89 unsigned short d_reclen; 90 unsigned short d_namlen; 91 char d_name[1]; 92}; 93 94struct osf_dirent_callback { 95 struct osf_dirent __user *dirent; 96 long __user *basep; 97 unsigned int count; 98 int error; 99}; 100 101static int 102osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 103 u64 ino, unsigned int d_type) 104{ 105 struct osf_dirent __user *dirent; 106 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 107 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 108 unsigned int d_ino; 109 110 buf->error = -EINVAL; /* only used if we fail */ 111 if (reclen > buf->count) 112 return -EINVAL; 113 d_ino = ino; 114 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { 115 buf->error = -EOVERFLOW; 116 return -EOVERFLOW; 117 } 118 if (buf->basep) { 119 if (put_user(offset, buf->basep)) 120 goto Efault; 121 buf->basep = NULL; 122 } 123 dirent = buf->dirent; 124 if (put_user(d_ino, &dirent->d_ino) || 125 put_user(namlen, &dirent->d_namlen) || 126 put_user(reclen, &dirent->d_reclen) || 127 copy_to_user(dirent->d_name, name, namlen) || 128 put_user(0, dirent->d_name + namlen)) 129 goto Efault; 130 dirent = (void __user *)dirent + reclen; 131 buf->dirent = dirent; 132 buf->count -= reclen; 133 return 0; 134Efault: 135 buf->error = -EFAULT; 136 return -EFAULT; 137} 138 139SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, 140 struct osf_dirent __user *, dirent, unsigned int, count, 141 long __user *, basep) 142{ 143 int error; 144 struct file *file; 145 struct osf_dirent_callback buf; 146 147 error = -EBADF; 148 file = fget(fd); 149 if (!file) 150 goto out; 151 152 buf.dirent = dirent; 153 buf.basep = basep; 154 buf.count = count; 155 buf.error = 0; 156 157 error = vfs_readdir(file, osf_filldir, &buf); 158 if (error >= 0) 159 error = buf.error; 160 if (count != buf.count) 161 error = count - buf.count; 162 163 fput(file); 164 out: 165 return error; 166} 167 168#undef NAME_OFFSET 169 170SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, 171 unsigned long, prot, unsigned long, flags, unsigned long, fd, 172 unsigned long, off) 173{ 174 unsigned long ret = -EINVAL; 175 176 if ((off + PAGE_ALIGN(len)) < off) 177 goto out; 178 if (off & ~PAGE_MASK) 179 goto out; 180 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 181 out: 182 return ret; 183} 184 185 186/* 187 * The OSF/1 statfs structure is much larger, but this should 188 * match the beginning, at least. 189 */ 190struct osf_statfs { 191 short f_type; 192 short f_flags; 193 int f_fsize; 194 int f_bsize; 195 int f_blocks; 196 int f_bfree; 197 int f_bavail; 198 int f_files; 199 int f_ffree; 200 __kernel_fsid_t f_fsid; 201}; 202 203static int 204linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 205 unsigned long bufsiz) 206{ 207 struct osf_statfs tmp_stat; 208 209 tmp_stat.f_type = linux_stat->f_type; 210 tmp_stat.f_flags = 0; /* mount flags */ 211 tmp_stat.f_fsize = linux_stat->f_frsize; 212 tmp_stat.f_bsize = linux_stat->f_bsize; 213 tmp_stat.f_blocks = linux_stat->f_blocks; 214 tmp_stat.f_bfree = linux_stat->f_bfree; 215 tmp_stat.f_bavail = linux_stat->f_bavail; 216 tmp_stat.f_files = linux_stat->f_files; 217 tmp_stat.f_ffree = linux_stat->f_ffree; 218 tmp_stat.f_fsid = linux_stat->f_fsid; 219 if (bufsiz > sizeof(tmp_stat)) 220 bufsiz = sizeof(tmp_stat); 221 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 222} 223 224static int 225do_osf_statfs(struct path *path, struct osf_statfs __user *buffer, 226 unsigned long bufsiz) 227{ 228 struct kstatfs linux_stat; 229 int error = vfs_statfs(path, &linux_stat); 230 if (!error) 231 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 232 return error; 233} 234 235SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname, 236 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 237{ 238 struct path path; 239 int retval; 240 241 retval = user_path(pathname, &path); 242 if (!retval) { 243 retval = do_osf_statfs(&path, buffer, bufsiz); 244 path_put(&path); 245 } 246 return retval; 247} 248 249SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, 250 struct osf_statfs __user *, buffer, unsigned long, bufsiz) 251{ 252 struct file *file; 253 int retval; 254 255 retval = -EBADF; 256 file = fget(fd); 257 if (file) { 258 retval = do_osf_statfs(&file->f_path, buffer, bufsiz); 259 fput(file); 260 } 261 return retval; 262} 263 264/* 265 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 266 * 267 * Although to be frank, neither are the native Linux/i386 ones.. 268 */ 269struct ufs_args { 270 char __user *devname; 271 int flags; 272 uid_t exroot; 273}; 274 275struct cdfs_args { 276 char __user *devname; 277 int flags; 278 uid_t exroot; 279 280 /* This has lots more here, which Linux handles with the option block 281 but I'm too lazy to do the translation into ASCII. */ 282}; 283 284struct procfs_args { 285 char __user *devname; 286 int flags; 287 uid_t exroot; 288}; 289 290/* 291 * We can't actually handle ufs yet, so we translate UFS mounts to 292 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 293 * layout is so braindead it's a major headache doing it. 294 * 295 * Just how long ago was it written? OTOH our UFS driver may be still 296 * unhappy with OSF UFS. [CHECKME] 297 */ 298static int 299osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 300{ 301 int retval; 302 struct cdfs_args tmp; 303 char *devname; 304 305 retval = -EFAULT; 306 if (copy_from_user(&tmp, args, sizeof(tmp))) 307 goto out; 308 devname = getname(tmp.devname); 309 retval = PTR_ERR(devname); 310 if (IS_ERR(devname)) 311 goto out; 312 retval = do_mount(devname, dirname, "ext2", flags, NULL); 313 putname(devname); 314 out: 315 return retval; 316} 317 318static int 319osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 320{ 321 int retval; 322 struct cdfs_args tmp; 323 char *devname; 324 325 retval = -EFAULT; 326 if (copy_from_user(&tmp, args, sizeof(tmp))) 327 goto out; 328 devname = getname(tmp.devname); 329 retval = PTR_ERR(devname); 330 if (IS_ERR(devname)) 331 goto out; 332 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 333 putname(devname); 334 out: 335 return retval; 336} 337 338static int 339osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 340{ 341 struct procfs_args tmp; 342 343 if (copy_from_user(&tmp, args, sizeof(tmp))) 344 return -EFAULT; 345 346 return do_mount("", dirname, "proc", flags, NULL); 347} 348 349SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path, 350 int, flag, void __user *, data) 351{ 352 int retval; 353 char *name; 354 355 name = getname(path); 356 retval = PTR_ERR(name); 357 if (IS_ERR(name)) 358 goto out; 359 switch (typenr) { 360 case 1: 361 retval = osf_ufs_mount(name, data, flag); 362 break; 363 case 6: 364 retval = osf_cdfs_mount(name, data, flag); 365 break; 366 case 9: 367 retval = osf_procfs_mount(name, data, flag); 368 break; 369 default: 370 retval = -EINVAL; 371 printk("osf_mount(%ld, %x)\n", typenr, flag); 372 } 373 putname(name); 374 out: 375 return retval; 376} 377 378SYSCALL_DEFINE1(osf_utsname, char __user *, name) 379{ 380 int error; 381 382 down_read(&uts_sem); 383 error = -EFAULT; 384 if (copy_to_user(name + 0, utsname()->sysname, 32)) 385 goto out; 386 if (copy_to_user(name + 32, utsname()->nodename, 32)) 387 goto out; 388 if (copy_to_user(name + 64, utsname()->release, 32)) 389 goto out; 390 if (copy_to_user(name + 96, utsname()->version, 32)) 391 goto out; 392 if (copy_to_user(name + 128, utsname()->machine, 32)) 393 goto out; 394 395 error = 0; 396 out: 397 up_read(&uts_sem); 398 return error; 399} 400 401SYSCALL_DEFINE0(getpagesize) 402{ 403 return PAGE_SIZE; 404} 405 406SYSCALL_DEFINE0(getdtablesize) 407{ 408 return sysctl_nr_open; 409} 410 411/* 412 * For compatibility with OSF/1 only. Use utsname(2) instead. 413 */ 414SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) 415{ 416 unsigned len; 417 int i; 418 419 if (!access_ok(VERIFY_WRITE, name, namelen)) 420 return -EFAULT; 421 422 len = namelen; 423 if (namelen > 32) 424 len = 32; 425 426 down_read(&uts_sem); 427 for (i = 0; i < len; ++i) { 428 __put_user(utsname()->domainname[i], name + i); 429 if (utsname()->domainname[i] == '\0') 430 break; 431 } 432 up_read(&uts_sem); 433 434 return 0; 435} 436 437/* 438 * The following stuff should move into a header file should it ever 439 * be labeled "officially supported." Right now, there is just enough 440 * support to avoid applications (such as tar) printing error 441 * messages. The attributes are not really implemented. 442 */ 443 444/* 445 * Values for Property list entry flag 446 */ 447#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 448 by default */ 449#define PLE_FLAG_MASK 0x1 /* Valid flag values */ 450#define PLE_FLAG_ALL -1 /* All flag value */ 451 452struct proplistname_args { 453 unsigned int pl_mask; 454 unsigned int pl_numnames; 455 char **pl_names; 456}; 457 458union pl_args { 459 struct setargs { 460 char __user *path; 461 long follow; 462 long nbytes; 463 char __user *buf; 464 } set; 465 struct fsetargs { 466 long fd; 467 long nbytes; 468 char __user *buf; 469 } fset; 470 struct getargs { 471 char __user *path; 472 long follow; 473 struct proplistname_args __user *name_args; 474 long nbytes; 475 char __user *buf; 476 int __user *min_buf_size; 477 } get; 478 struct fgetargs { 479 long fd; 480 struct proplistname_args __user *name_args; 481 long nbytes; 482 char __user *buf; 483 int __user *min_buf_size; 484 } fget; 485 struct delargs { 486 char __user *path; 487 long follow; 488 struct proplistname_args __user *name_args; 489 } del; 490 struct fdelargs { 491 long fd; 492 struct proplistname_args __user *name_args; 493 } fdel; 494}; 495 496enum pl_code { 497 PL_SET = 1, PL_FSET = 2, 498 PL_GET = 3, PL_FGET = 4, 499 PL_DEL = 5, PL_FDEL = 6 500}; 501 502SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, 503 union pl_args __user *, args) 504{ 505 long error; 506 int __user *min_buf_size_ptr; 507 508 switch (code) { 509 case PL_SET: 510 if (get_user(error, &args->set.nbytes)) 511 error = -EFAULT; 512 break; 513 case PL_FSET: 514 if (get_user(error, &args->fset.nbytes)) 515 error = -EFAULT; 516 break; 517 case PL_GET: 518 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 519 if (error) 520 break; 521 error = put_user(0, min_buf_size_ptr); 522 break; 523 case PL_FGET: 524 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 525 if (error) 526 break; 527 error = put_user(0, min_buf_size_ptr); 528 break; 529 case PL_DEL: 530 case PL_FDEL: 531 error = 0; 532 break; 533 default: 534 error = -EOPNOTSUPP; 535 break; 536 }; 537 return error; 538} 539 540SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, 541 struct sigstack __user *, uoss) 542{ 543 unsigned long usp = rdusp(); 544 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 545 unsigned long oss_os = on_sig_stack(usp); 546 int error; 547 548 if (uss) { 549 void __user *ss_sp; 550 551 error = -EFAULT; 552 if (get_user(ss_sp, &uss->ss_sp)) 553 goto out; 554 555 /* If the current stack was set with sigaltstack, don't 556 swap stacks while we are on it. */ 557 error = -EPERM; 558 if (current->sas_ss_sp && on_sig_stack(usp)) 559 goto out; 560 561 /* Since we don't know the extent of the stack, and we don't 562 track onstack-ness, but rather calculate it, we must 563 presume a size. Ho hum this interface is lossy. */ 564 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 565 current->sas_ss_size = SIGSTKSZ; 566 } 567 568 if (uoss) { 569 error = -EFAULT; 570 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 571 || __put_user(oss_sp, &uoss->ss_sp) 572 || __put_user(oss_os, &uoss->ss_onstack)) 573 goto out; 574 } 575 576 error = 0; 577 out: 578 return error; 579} 580 581SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) 582{ 583 const char *sysinfo_table[] = { 584 utsname()->sysname, 585 utsname()->nodename, 586 utsname()->release, 587 utsname()->version, 588 utsname()->machine, 589 "alpha", /* instruction set architecture */ 590 "dummy", /* hardware serial number */ 591 "dummy", /* hardware manufacturer */ 592 "dummy", /* secure RPC domain */ 593 }; 594 unsigned long offset; 595 const char *res; 596 long len, err = -EINVAL; 597 598 offset = command-1; 599 if (offset >= ARRAY_SIZE(sysinfo_table)) { 600 /* Digital UNIX has a few unpublished interfaces here */ 601 printk("sysinfo(%d)", command); 602 goto out; 603 } 604 605 down_read(&uts_sem); 606 res = sysinfo_table[offset]; 607 len = strlen(res)+1; 608 if (len > count) 609 len = count; 610 if (copy_to_user(buf, res, len)) 611 err = -EFAULT; 612 else 613 err = 0; 614 up_read(&uts_sem); 615 out: 616 return err; 617} 618 619SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, 620 unsigned long, nbytes, int __user *, start, void __user *, arg) 621{ 622 unsigned long w; 623 struct percpu_struct *cpu; 624 625 switch (op) { 626 case GSI_IEEE_FP_CONTROL: 627 /* Return current software fp control & status bits. */ 628 /* Note that DU doesn't verify available space here. */ 629 630 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 631 w = swcr_update_status(w, rdfpcr()); 632 if (put_user(w, (unsigned long __user *) buffer)) 633 return -EFAULT; 634 return 0; 635 636 case GSI_IEEE_STATE_AT_SIGNAL: 637 /* 638 * Not sure anybody will ever use this weird stuff. These 639 * ops can be used (under OSF/1) to set the fpcr that should 640 * be used when a signal handler starts executing. 641 */ 642 break; 643 644 case GSI_UACPROC: 645 if (nbytes < sizeof(unsigned int)) 646 return -EINVAL; 647 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 648 if (put_user(w, (unsigned int __user *)buffer)) 649 return -EFAULT; 650 return 1; 651 652 case GSI_PROC_TYPE: 653 if (nbytes < sizeof(unsigned long)) 654 return -EINVAL; 655 cpu = (struct percpu_struct*) 656 ((char*)hwrpb + hwrpb->processor_offset); 657 w = cpu->type; 658 if (put_user(w, (unsigned long __user*)buffer)) 659 return -EFAULT; 660 return 1; 661 662 case GSI_GET_HWRPB: 663 if (nbytes < sizeof(*hwrpb)) 664 return -EINVAL; 665 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 666 return -EFAULT; 667 return 1; 668 669 default: 670 break; 671 } 672 673 return -EOPNOTSUPP; 674} 675 676SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, 677 unsigned long, nbytes, int __user *, start, void __user *, arg) 678{ 679 switch (op) { 680 case SSI_IEEE_FP_CONTROL: { 681 unsigned long swcr, fpcr; 682 unsigned int *state; 683 684 /* 685 * Alpha Architecture Handbook 4.7.7.3: 686 * To be fully IEEE compiant, we must track the current IEEE 687 * exception state in software, because spurious bits can be 688 * set in the trap shadow of a software-complete insn. 689 */ 690 691 if (get_user(swcr, (unsigned long __user *)buffer)) 692 return -EFAULT; 693 state = ¤t_thread_info()->ieee_state; 694 695 /* Update softare trap enable bits. */ 696 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 697 698 /* Update the real fpcr. */ 699 fpcr = rdfpcr() & FPCR_DYN_MASK; 700 fpcr |= ieee_swcr_to_fpcr(swcr); 701 wrfpcr(fpcr); 702 703 return 0; 704 } 705 706 case SSI_IEEE_RAISE_EXCEPTION: { 707 unsigned long exc, swcr, fpcr, fex; 708 unsigned int *state; 709 710 if (get_user(exc, (unsigned long __user *)buffer)) 711 return -EFAULT; 712 state = ¤t_thread_info()->ieee_state; 713 exc &= IEEE_STATUS_MASK; 714 715 /* Update softare trap enable bits. */ 716 swcr = (*state & IEEE_SW_MASK) | exc; 717 *state |= exc; 718 719 /* Update the real fpcr. */ 720 fpcr = rdfpcr(); 721 fpcr |= ieee_swcr_to_fpcr(swcr); 722 wrfpcr(fpcr); 723 724 /* If any exceptions set by this call, and are unmasked, 725 send a signal. Old exceptions are not signaled. */ 726 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 727 if (fex) { 728 siginfo_t info; 729 int si_code = 0; 730 731 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 732 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 733 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 734 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 735 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 736 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 737 738 info.si_signo = SIGFPE; 739 info.si_errno = 0; 740 info.si_code = si_code; 741 info.si_addr = NULL; 742 send_sig_info(SIGFPE, &info, current); 743 } 744 return 0; 745 } 746 747 case SSI_IEEE_STATE_AT_SIGNAL: 748 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 749 /* 750 * Not sure anybody will ever use this weird stuff. These 751 * ops can be used (under OSF/1) to set the fpcr that should 752 * be used when a signal handler starts executing. 753 */ 754 break; 755 756 case SSI_NVPAIRS: { 757 unsigned long v, w, i; 758 unsigned int old, new; 759 760 for (i = 0; i < nbytes; ++i) { 761 762 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 763 return -EFAULT; 764 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 765 return -EFAULT; 766 switch (v) { 767 case SSIN_UACPROC: 768 again: 769 old = current_thread_info()->flags; 770 new = old & ~(UAC_BITMASK << UAC_SHIFT); 771 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 772 if (cmpxchg(¤t_thread_info()->flags, 773 old, new) != old) 774 goto again; 775 break; 776 777 default: 778 return -EOPNOTSUPP; 779 } 780 } 781 return 0; 782 } 783 784 default: 785 break; 786 } 787 788 return -EOPNOTSUPP; 789} 790 791/* Translations due to the fact that OSF's time_t is an int. Which 792 affects all sorts of things, like timeval and itimerval. */ 793 794extern struct timezone sys_tz; 795 796struct timeval32 797{ 798 int tv_sec, tv_usec; 799}; 800 801struct itimerval32 802{ 803 struct timeval32 it_interval; 804 struct timeval32 it_value; 805}; 806 807static inline long 808get_tv32(struct timeval *o, struct timeval32 __user *i) 809{ 810 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 811 (__get_user(o->tv_sec, &i->tv_sec) | 812 __get_user(o->tv_usec, &i->tv_usec))); 813} 814 815static inline long 816put_tv32(struct timeval32 __user *o, struct timeval *i) 817{ 818 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 819 (__put_user(i->tv_sec, &o->tv_sec) | 820 __put_user(i->tv_usec, &o->tv_usec))); 821} 822 823static inline long 824get_it32(struct itimerval *o, struct itimerval32 __user *i) 825{ 826 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 827 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 828 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 829 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 830 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 831} 832 833static inline long 834put_it32(struct itimerval32 __user *o, struct itimerval *i) 835{ 836 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 837 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 838 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 839 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 840 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 841} 842 843static inline void 844jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 845{ 846 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 847 value->tv_sec = jiffies / HZ; 848} 849 850SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, 851 struct timezone __user *, tz) 852{ 853 if (tv) { 854 struct timeval ktv; 855 do_gettimeofday(&ktv); 856 if (put_tv32(tv, &ktv)) 857 return -EFAULT; 858 } 859 if (tz) { 860 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 861 return -EFAULT; 862 } 863 return 0; 864} 865 866SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, 867 struct timezone __user *, tz) 868{ 869 struct timespec kts; 870 struct timezone ktz; 871 872 if (tv) { 873 if (get_tv32((struct timeval *)&kts, tv)) 874 return -EFAULT; 875 } 876 if (tz) { 877 if (copy_from_user(&ktz, tz, sizeof(*tz))) 878 return -EFAULT; 879 } 880 881 kts.tv_nsec *= 1000; 882 883 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 884} 885 886SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) 887{ 888 struct itimerval kit; 889 int error; 890 891 error = do_getitimer(which, &kit); 892 if (!error && put_it32(it, &kit)) 893 error = -EFAULT; 894 895 return error; 896} 897 898SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, 899 struct itimerval32 __user *, out) 900{ 901 struct itimerval kin, kout; 902 int error; 903 904 if (in) { 905 if (get_it32(&kin, in)) 906 return -EFAULT; 907 } else 908 memset(&kin, 0, sizeof(kin)); 909 910 error = do_setitimer(which, &kin, out ? &kout : NULL); 911 if (error || !out) 912 return error; 913 914 if (put_it32(out, &kout)) 915 return -EFAULT; 916 917 return 0; 918 919} 920 921SYSCALL_DEFINE2(osf_utimes, const char __user *, filename, 922 struct timeval32 __user *, tvs) 923{ 924 struct timespec tv[2]; 925 926 if (tvs) { 927 struct timeval ktvs[2]; 928 if (get_tv32(&ktvs[0], &tvs[0]) || 929 get_tv32(&ktvs[1], &tvs[1])) 930 return -EFAULT; 931 932 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 933 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 934 return -EINVAL; 935 936 tv[0].tv_sec = ktvs[0].tv_sec; 937 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 938 tv[1].tv_sec = ktvs[1].tv_sec; 939 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 940 } 941 942 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 943} 944 945#define MAX_SELECT_SECONDS \ 946 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) 947 948SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, 949 fd_set __user *, exp, struct timeval32 __user *, tvp) 950{ 951 struct timespec end_time, *to = NULL; 952 if (tvp) { 953 time_t sec, usec; 954 955 to = &end_time; 956 957 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 958 || __get_user(sec, &tvp->tv_sec) 959 || __get_user(usec, &tvp->tv_usec)) { 960 return -EFAULT; 961 } 962 963 if (sec < 0 || usec < 0) 964 return -EINVAL; 965 966 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC)) 967 return -EINVAL; 968 969 } 970 971 /* OSF does not copy back the remaining time. */ 972 return core_sys_select(n, inp, outp, exp, to); 973} 974 975struct rusage32 { 976 struct timeval32 ru_utime; /* user time used */ 977 struct timeval32 ru_stime; /* system time used */ 978 long ru_maxrss; /* maximum resident set size */ 979 long ru_ixrss; /* integral shared memory size */ 980 long ru_idrss; /* integral unshared data size */ 981 long ru_isrss; /* integral unshared stack size */ 982 long ru_minflt; /* page reclaims */ 983 long ru_majflt; /* page faults */ 984 long ru_nswap; /* swaps */ 985 long ru_inblock; /* block input operations */ 986 long ru_oublock; /* block output operations */ 987 long ru_msgsnd; /* messages sent */ 988 long ru_msgrcv; /* messages received */ 989 long ru_nsignals; /* signals received */ 990 long ru_nvcsw; /* voluntary context switches */ 991 long ru_nivcsw; /* involuntary " */ 992}; 993 994SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) 995{ 996 struct rusage32 r; 997 998 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 999 return -EINVAL; 1000 1001 memset(&r, 0, sizeof(r)); 1002 switch (who) { 1003 case RUSAGE_SELF: 1004 jiffies_to_timeval32(current->utime, &r.ru_utime); 1005 jiffies_to_timeval32(current->stime, &r.ru_stime); 1006 r.ru_minflt = current->min_flt; 1007 r.ru_majflt = current->maj_flt; 1008 break; 1009 case RUSAGE_CHILDREN: 1010 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1011 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1012 r.ru_minflt = current->signal->cmin_flt; 1013 r.ru_majflt = current->signal->cmaj_flt; 1014 break; 1015 } 1016 1017 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1018} 1019 1020SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, 1021 struct rusage32 __user *, ur) 1022{ 1023 struct rusage r; 1024 long ret, err; 1025 mm_segment_t old_fs; 1026 1027 if (!ur) 1028 return sys_wait4(pid, ustatus, options, NULL); 1029 1030 old_fs = get_fs(); 1031 1032 set_fs (KERNEL_DS); 1033 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1034 set_fs (old_fs); 1035 1036 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1037 return -EFAULT; 1038 1039 err = 0; 1040 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1041 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1042 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1043 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1044 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1045 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1046 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1047 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1048 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1049 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1050 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1051 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1052 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1053 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1054 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1055 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1056 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1057 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1058 1059 return err ? err : ret; 1060} 1061 1062/* 1063 * I don't know what the parameters are: the first one 1064 * seems to be a timeval pointer, and I suspect the second 1065 * one is the time remaining.. Ho humm.. No documentation. 1066 */ 1067SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, 1068 struct timeval32 __user *, remain) 1069{ 1070 struct timeval tmp; 1071 unsigned long ticks; 1072 1073 if (get_tv32(&tmp, sleep)) 1074 goto fault; 1075 1076 ticks = timeval_to_jiffies(&tmp); 1077 1078 ticks = schedule_timeout_interruptible(ticks); 1079 1080 if (remain) { 1081 jiffies_to_timeval(ticks, &tmp); 1082 if (put_tv32(remain, &tmp)) 1083 goto fault; 1084 } 1085 1086 return 0; 1087 fault: 1088 return -EFAULT; 1089} 1090 1091 1092struct timex32 { 1093 unsigned int modes; /* mode selector */ 1094 long offset; /* time offset (usec) */ 1095 long freq; /* frequency offset (scaled ppm) */ 1096 long maxerror; /* maximum error (usec) */ 1097 long esterror; /* estimated error (usec) */ 1098 int status; /* clock command/status */ 1099 long constant; /* pll time constant */ 1100 long precision; /* clock precision (usec) (read only) */ 1101 long tolerance; /* clock frequency tolerance (ppm) 1102 * (read only) 1103 */ 1104 struct timeval32 time; /* (read only) */ 1105 long tick; /* (modified) usecs between clock ticks */ 1106 1107 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1108 long jitter; /* pps jitter (us) (ro) */ 1109 int shift; /* interval duration (s) (shift) (ro) */ 1110 long stabil; /* pps stability (scaled ppm) (ro) */ 1111 long jitcnt; /* jitter limit exceeded (ro) */ 1112 long calcnt; /* calibration intervals (ro) */ 1113 long errcnt; /* calibration errors (ro) */ 1114 long stbcnt; /* stability limit exceeded (ro) */ 1115 1116 int :32; int :32; int :32; int :32; 1117 int :32; int :32; int :32; int :32; 1118 int :32; int :32; int :32; int :32; 1119}; 1120 1121SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) 1122{ 1123 struct timex txc; 1124 int ret; 1125 1126 /* copy relevant bits of struct timex. */ 1127 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1128 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1129 offsetof(struct timex32, time))) 1130 return -EFAULT; 1131 1132 ret = do_adjtimex(&txc); 1133 if (ret < 0) 1134 return ret; 1135 1136 /* copy back to timex32 */ 1137 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1138 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1139 offsetof(struct timex32, tick))) || 1140 (put_tv32(&txc_p->time, &txc.time))) 1141 return -EFAULT; 1142 1143 return ret; 1144} 1145 1146/* Get an address range which is currently unmapped. Similar to the 1147 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1148 1149static unsigned long 1150arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1151 unsigned long limit) 1152{ 1153 struct vm_area_struct *vma = find_vma(current->mm, addr); 1154 1155 while (1) { 1156 /* At this point: (!vma || addr < vma->vm_end). */ 1157 if (limit - len < addr) 1158 return -ENOMEM; 1159 if (!vma || addr + len <= vma->vm_start) 1160 return addr; 1161 addr = vma->vm_end; 1162 vma = vma->vm_next; 1163 } 1164} 1165 1166unsigned long 1167arch_get_unmapped_area(struct file *filp, unsigned long addr, 1168 unsigned long len, unsigned long pgoff, 1169 unsigned long flags) 1170{ 1171 unsigned long limit; 1172 1173 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1174 if (current->personality & ADDR_LIMIT_32BIT) 1175 limit = 0x80000000; 1176 else 1177 limit = TASK_SIZE; 1178 1179 if (len > limit) 1180 return -ENOMEM; 1181 1182 if (flags & MAP_FIXED) 1183 return addr; 1184 1185 /* First, see if the given suggestion fits. 1186 1187 The OSF/1 loader (/sbin/loader) relies on us returning an 1188 address larger than the requested if one exists, which is 1189 a terribly broken way to program. 1190 1191 That said, I can see the use in being able to suggest not 1192 merely specific addresses, but regions of memory -- perhaps 1193 this feature should be incorporated into all ports? */ 1194 1195 if (addr) { 1196 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1197 if (addr != (unsigned long) -ENOMEM) 1198 return addr; 1199 } 1200 1201 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1202 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1203 len, limit); 1204 if (addr != (unsigned long) -ENOMEM) 1205 return addr; 1206 1207 /* Finally, try allocating in low memory. */ 1208 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1209 1210 return addr; 1211} 1212 1213#ifdef CONFIG_OSF4_COMPAT 1214 1215/* Clear top 32 bits of iov_len in the user's buffer for 1216 compatibility with old versions of OSF/1 where iov_len 1217 was defined as int. */ 1218static int 1219osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1220{ 1221 unsigned long i; 1222 1223 for (i = 0 ; i < count ; i++) { 1224 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1225 1226 if (put_user(0, iov_len_high)) 1227 return -EFAULT; 1228 } 1229 return 0; 1230} 1231 1232SYSCALL_DEFINE3(osf_readv, unsigned long, fd, 1233 const struct iovec __user *, vector, unsigned long, count) 1234{ 1235 if (unlikely(personality(current->personality) == PER_OSF4)) 1236 if (osf_fix_iov_len(vector, count)) 1237 return -EFAULT; 1238 return sys_readv(fd, vector, count); 1239} 1240 1241SYSCALL_DEFINE3(osf_writev, unsigned long, fd, 1242 const struct iovec __user *, vector, unsigned long, count) 1243{ 1244 if (unlikely(personality(current->personality) == PER_OSF4)) 1245 if (osf_fix_iov_len(vector, count)) 1246 return -EFAULT; 1247 return sys_writev(fd, vector, count); 1248} 1249 1250#endif 1251