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/smp_lock.h> 19#include <linux/stddef.h> 20#include <linux/syscalls.h> 21#include <linux/unistd.h> 22#include <linux/ptrace.h> 23#include <linux/slab.h> 24#include <linux/user.h> 25#include <linux/a.out.h> 26#include <linux/utsname.h> 27#include <linux/time.h> 28#include <linux/timex.h> 29#include <linux/major.h> 30#include <linux/stat.h> 31#include <linux/mman.h> 32#include <linux/shm.h> 33#include <linux/poll.h> 34#include <linux/file.h> 35#include <linux/types.h> 36#include <linux/ipc.h> 37#include <linux/namei.h> 38#include <linux/uio.h> 39#include <linux/vfs.h> 40#include <linux/rcupdate.h> 41 42#include <asm/fpu.h> 43#include <asm/io.h> 44#include <asm/uaccess.h> 45#include <asm/system.h> 46#include <asm/sysinfo.h> 47#include <asm/hwrpb.h> 48#include <asm/processor.h> 49 50extern int do_pipe(int *); 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 */ 58asmlinkage unsigned long 59osf_brk(unsigned long brk) 60{ 61 unsigned long retval = sys_brk(brk); 62 if (brk && brk != retval) 63 retval = -ENOMEM; 64 return retval; 65} 66 67/* 68 * This is pure guess-work.. 69 */ 70asmlinkage int 71osf_set_program_attributes(unsigned long text_start, unsigned long text_len, 72 unsigned long bss_start, unsigned long bss_len) 73{ 74 struct mm_struct *mm; 75 76 lock_kernel(); 77 mm = current->mm; 78 mm->end_code = bss_start + bss_len; 79 mm->brk = bss_start + bss_len; 80 unlock_kernel(); 81 return 0; 82} 83 84/* 85 * OSF/1 directory handling functions... 86 * 87 * The "getdents()" interface is much more sane: the "basep" stuff is 88 * braindamage (it can't really handle filesystems where the directory 89 * offset differences aren't the same as "d_reclen"). 90 */ 91#define NAME_OFFSET offsetof (struct osf_dirent, d_name) 92 93struct osf_dirent { 94 unsigned int d_ino; 95 unsigned short d_reclen; 96 unsigned short d_namlen; 97 char d_name[1]; 98}; 99 100struct osf_dirent_callback { 101 struct osf_dirent __user *dirent; 102 long __user *basep; 103 unsigned int count; 104 int error; 105}; 106 107static int 108osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, 109 u64 ino, unsigned int d_type) 110{ 111 struct osf_dirent __user *dirent; 112 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; 113 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); 114 unsigned int d_ino; 115 116 buf->error = -EINVAL; /* only used if we fail */ 117 if (reclen > buf->count) 118 return -EINVAL; 119 d_ino = ino; 120 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) 121 return -EOVERFLOW; 122 if (buf->basep) { 123 if (put_user(offset, buf->basep)) 124 return -EFAULT; 125 buf->basep = NULL; 126 } 127 dirent = buf->dirent; 128 put_user(d_ino, &dirent->d_ino); 129 put_user(namlen, &dirent->d_namlen); 130 put_user(reclen, &dirent->d_reclen); 131 if (copy_to_user(dirent->d_name, name, namlen) || 132 put_user(0, dirent->d_name + namlen)) 133 return -EFAULT; 134 dirent = (void __user *)dirent + reclen; 135 buf->dirent = dirent; 136 buf->count -= reclen; 137 return 0; 138} 139 140asmlinkage int 141osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, 142 unsigned int count, long __user *basep) 143{ 144 int error; 145 struct file *file; 146 struct osf_dirent_callback buf; 147 148 error = -EBADF; 149 file = fget(fd); 150 if (!file) 151 goto out; 152 153 buf.dirent = dirent; 154 buf.basep = basep; 155 buf.count = count; 156 buf.error = 0; 157 158 error = vfs_readdir(file, osf_filldir, &buf); 159 if (error < 0) 160 goto out_putf; 161 162 error = buf.error; 163 if (count != buf.count) 164 error = count - buf.count; 165 166 out_putf: 167 fput(file); 168 out: 169 return error; 170} 171 172#undef NAME_OFFSET 173 174asmlinkage unsigned long 175osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, 176 unsigned long flags, unsigned long fd, unsigned long off) 177{ 178 struct file *file = NULL; 179 unsigned long ret = -EBADF; 180 181 if (!(flags & MAP_ANONYMOUS)) { 182 file = fget(fd); 183 if (!file) 184 goto out; 185 } 186 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); 187 down_write(¤t->mm->mmap_sem); 188 ret = do_mmap(file, addr, len, prot, flags, off); 189 up_write(¤t->mm->mmap_sem); 190 if (file) 191 fput(file); 192 out: 193 return ret; 194} 195 196 197/* 198 * The OSF/1 statfs structure is much larger, but this should 199 * match the beginning, at least. 200 */ 201struct osf_statfs { 202 short f_type; 203 short f_flags; 204 int f_fsize; 205 int f_bsize; 206 int f_blocks; 207 int f_bfree; 208 int f_bavail; 209 int f_files; 210 int f_ffree; 211 __kernel_fsid_t f_fsid; 212}; 213 214static int 215linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, 216 unsigned long bufsiz) 217{ 218 struct osf_statfs tmp_stat; 219 220 tmp_stat.f_type = linux_stat->f_type; 221 tmp_stat.f_flags = 0; /* mount flags */ 222 tmp_stat.f_fsize = linux_stat->f_frsize; 223 tmp_stat.f_bsize = linux_stat->f_bsize; 224 tmp_stat.f_blocks = linux_stat->f_blocks; 225 tmp_stat.f_bfree = linux_stat->f_bfree; 226 tmp_stat.f_bavail = linux_stat->f_bavail; 227 tmp_stat.f_files = linux_stat->f_files; 228 tmp_stat.f_ffree = linux_stat->f_ffree; 229 tmp_stat.f_fsid = linux_stat->f_fsid; 230 if (bufsiz > sizeof(tmp_stat)) 231 bufsiz = sizeof(tmp_stat); 232 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; 233} 234 235static int 236do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, 237 unsigned long bufsiz) 238{ 239 struct kstatfs linux_stat; 240 int error = vfs_statfs(dentry, &linux_stat); 241 if (!error) 242 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); 243 return error; 244} 245 246asmlinkage int 247osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz) 248{ 249 struct nameidata nd; 250 int retval; 251 252 retval = user_path_walk(path, &nd); 253 if (!retval) { 254 retval = do_osf_statfs(nd.dentry, buffer, bufsiz); 255 path_release(&nd); 256 } 257 return retval; 258} 259 260asmlinkage int 261osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) 262{ 263 struct file *file; 264 int retval; 265 266 retval = -EBADF; 267 file = fget(fd); 268 if (file) { 269 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz); 270 fput(file); 271 } 272 return retval; 273} 274 275/* 276 * Uhh.. OSF/1 mount parameters aren't exactly obvious.. 277 * 278 * Although to be frank, neither are the native Linux/i386 ones.. 279 */ 280struct ufs_args { 281 char __user *devname; 282 int flags; 283 uid_t exroot; 284}; 285 286struct cdfs_args { 287 char __user *devname; 288 int flags; 289 uid_t exroot; 290 291 /* This has lots more here, which Linux handles with the option block 292 but I'm too lazy to do the translation into ASCII. */ 293}; 294 295struct procfs_args { 296 char __user *devname; 297 int flags; 298 uid_t exroot; 299}; 300 301/* 302 * We can't actually handle ufs yet, so we translate UFS mounts to 303 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS 304 * layout is so braindead it's a major headache doing it. 305 * 306 * Just how long ago was it written? OTOH our UFS driver may be still 307 * unhappy with OSF UFS. [CHECKME] 308 */ 309static int 310osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) 311{ 312 int retval; 313 struct cdfs_args tmp; 314 char *devname; 315 316 retval = -EFAULT; 317 if (copy_from_user(&tmp, args, sizeof(tmp))) 318 goto out; 319 devname = getname(tmp.devname); 320 retval = PTR_ERR(devname); 321 if (IS_ERR(devname)) 322 goto out; 323 retval = do_mount(devname, dirname, "ext2", flags, NULL); 324 putname(devname); 325 out: 326 return retval; 327} 328 329static int 330osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) 331{ 332 int retval; 333 struct cdfs_args tmp; 334 char *devname; 335 336 retval = -EFAULT; 337 if (copy_from_user(&tmp, args, sizeof(tmp))) 338 goto out; 339 devname = getname(tmp.devname); 340 retval = PTR_ERR(devname); 341 if (IS_ERR(devname)) 342 goto out; 343 retval = do_mount(devname, dirname, "iso9660", flags, NULL); 344 putname(devname); 345 out: 346 return retval; 347} 348 349static int 350osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) 351{ 352 struct procfs_args tmp; 353 354 if (copy_from_user(&tmp, args, sizeof(tmp))) 355 return -EFAULT; 356 357 return do_mount("", dirname, "proc", flags, NULL); 358} 359 360asmlinkage int 361osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) 362{ 363 int retval = -EINVAL; 364 char *name; 365 366 lock_kernel(); 367 368 name = getname(path); 369 retval = PTR_ERR(name); 370 if (IS_ERR(name)) 371 goto out; 372 switch (typenr) { 373 case 1: 374 retval = osf_ufs_mount(name, data, flag); 375 break; 376 case 6: 377 retval = osf_cdfs_mount(name, data, flag); 378 break; 379 case 9: 380 retval = osf_procfs_mount(name, data, flag); 381 break; 382 default: 383 printk("osf_mount(%ld, %x)\n", typenr, flag); 384 } 385 putname(name); 386 out: 387 unlock_kernel(); 388 return retval; 389} 390 391asmlinkage int 392osf_utsname(char __user *name) 393{ 394 int error; 395 396 down_read(&uts_sem); 397 error = -EFAULT; 398 if (copy_to_user(name + 0, utsname()->sysname, 32)) 399 goto out; 400 if (copy_to_user(name + 32, utsname()->nodename, 32)) 401 goto out; 402 if (copy_to_user(name + 64, utsname()->release, 32)) 403 goto out; 404 if (copy_to_user(name + 96, utsname()->version, 32)) 405 goto out; 406 if (copy_to_user(name + 128, utsname()->machine, 32)) 407 goto out; 408 409 error = 0; 410 out: 411 up_read(&uts_sem); 412 return error; 413} 414 415asmlinkage unsigned long 416sys_getpagesize(void) 417{ 418 return PAGE_SIZE; 419} 420 421asmlinkage unsigned long 422sys_getdtablesize(void) 423{ 424 return NR_OPEN; 425} 426 427/* 428 * For compatibility with OSF/1 only. Use utsname(2) instead. 429 */ 430asmlinkage int 431osf_getdomainname(char __user *name, int namelen) 432{ 433 unsigned len; 434 int i; 435 436 if (!access_ok(VERIFY_WRITE, name, namelen)) 437 return -EFAULT; 438 439 len = namelen; 440 if (namelen > 32) 441 len = 32; 442 443 down_read(&uts_sem); 444 for (i = 0; i < len; ++i) { 445 __put_user(utsname()->domainname[i], name + i); 446 if (utsname()->domainname[i] == '\0') 447 break; 448 } 449 up_read(&uts_sem); 450 451 return 0; 452} 453 454/* 455 * The following stuff should move into a header file should it ever 456 * be labeled "officially supported." Right now, there is just enough 457 * support to avoid applications (such as tar) printing error 458 * messages. The attributes are not really implemented. 459 */ 460 461/* 462 * Values for Property list entry flag 463 */ 464#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry 465 by default */ 466#define PLE_FLAG_MASK 0x1 /* Valid flag values */ 467#define PLE_FLAG_ALL -1 /* All flag value */ 468 469struct proplistname_args { 470 unsigned int pl_mask; 471 unsigned int pl_numnames; 472 char **pl_names; 473}; 474 475union pl_args { 476 struct setargs { 477 char __user *path; 478 long follow; 479 long nbytes; 480 char __user *buf; 481 } set; 482 struct fsetargs { 483 long fd; 484 long nbytes; 485 char __user *buf; 486 } fset; 487 struct getargs { 488 char __user *path; 489 long follow; 490 struct proplistname_args __user *name_args; 491 long nbytes; 492 char __user *buf; 493 int __user *min_buf_size; 494 } get; 495 struct fgetargs { 496 long fd; 497 struct proplistname_args __user *name_args; 498 long nbytes; 499 char __user *buf; 500 int __user *min_buf_size; 501 } fget; 502 struct delargs { 503 char __user *path; 504 long follow; 505 struct proplistname_args __user *name_args; 506 } del; 507 struct fdelargs { 508 long fd; 509 struct proplistname_args __user *name_args; 510 } fdel; 511}; 512 513enum pl_code { 514 PL_SET = 1, PL_FSET = 2, 515 PL_GET = 3, PL_FGET = 4, 516 PL_DEL = 5, PL_FDEL = 6 517}; 518 519asmlinkage long 520osf_proplist_syscall(enum pl_code code, union pl_args __user *args) 521{ 522 long error; 523 int __user *min_buf_size_ptr; 524 525 lock_kernel(); 526 switch (code) { 527 case PL_SET: 528 if (get_user(error, &args->set.nbytes)) 529 error = -EFAULT; 530 break; 531 case PL_FSET: 532 if (get_user(error, &args->fset.nbytes)) 533 error = -EFAULT; 534 break; 535 case PL_GET: 536 error = get_user(min_buf_size_ptr, &args->get.min_buf_size); 537 if (error) 538 break; 539 error = put_user(0, min_buf_size_ptr); 540 break; 541 case PL_FGET: 542 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); 543 if (error) 544 break; 545 error = put_user(0, min_buf_size_ptr); 546 break; 547 case PL_DEL: 548 case PL_FDEL: 549 error = 0; 550 break; 551 default: 552 error = -EOPNOTSUPP; 553 break; 554 }; 555 unlock_kernel(); 556 return error; 557} 558 559asmlinkage int 560osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) 561{ 562 unsigned long usp = rdusp(); 563 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; 564 unsigned long oss_os = on_sig_stack(usp); 565 int error; 566 567 if (uss) { 568 void __user *ss_sp; 569 570 error = -EFAULT; 571 if (get_user(ss_sp, &uss->ss_sp)) 572 goto out; 573 574 /* If the current stack was set with sigaltstack, don't 575 swap stacks while we are on it. */ 576 error = -EPERM; 577 if (current->sas_ss_sp && on_sig_stack(usp)) 578 goto out; 579 580 /* Since we don't know the extent of the stack, and we don't 581 track onstack-ness, but rather calculate it, we must 582 presume a size. Ho hum this interface is lossy. */ 583 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; 584 current->sas_ss_size = SIGSTKSZ; 585 } 586 587 if (uoss) { 588 error = -EFAULT; 589 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) 590 || __put_user(oss_sp, &uoss->ss_sp) 591 || __put_user(oss_os, &uoss->ss_onstack)) 592 goto out; 593 } 594 595 error = 0; 596 out: 597 return error; 598} 599 600asmlinkage long 601osf_sysinfo(int command, char __user *buf, long count) 602{ 603 char *sysinfo_table[] = { 604 utsname()->sysname, 605 utsname()->nodename, 606 utsname()->release, 607 utsname()->version, 608 utsname()->machine, 609 "alpha", /* instruction set architecture */ 610 "dummy", /* hardware serial number */ 611 "dummy", /* hardware manufacturer */ 612 "dummy", /* secure RPC domain */ 613 }; 614 unsigned long offset; 615 char *res; 616 long len, err = -EINVAL; 617 618 offset = command-1; 619 if (offset >= ARRAY_SIZE(sysinfo_table)) { 620 /* Digital UNIX has a few unpublished interfaces here */ 621 printk("sysinfo(%d)", command); 622 goto out; 623 } 624 625 down_read(&uts_sem); 626 res = sysinfo_table[offset]; 627 len = strlen(res)+1; 628 if (len > count) 629 len = count; 630 if (copy_to_user(buf, res, len)) 631 err = -EFAULT; 632 else 633 err = 0; 634 up_read(&uts_sem); 635 out: 636 return err; 637} 638 639asmlinkage unsigned long 640osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 641 int __user *start, void __user *arg) 642{ 643 unsigned long w; 644 struct percpu_struct *cpu; 645 646 switch (op) { 647 case GSI_IEEE_FP_CONTROL: 648 /* Return current software fp control & status bits. */ 649 /* Note that DU doesn't verify available space here. */ 650 651 w = current_thread_info()->ieee_state & IEEE_SW_MASK; 652 w = swcr_update_status(w, rdfpcr()); 653 if (put_user(w, (unsigned long __user *) buffer)) 654 return -EFAULT; 655 return 0; 656 657 case GSI_IEEE_STATE_AT_SIGNAL: 658 /* 659 * Not sure anybody will ever use this weird stuff. These 660 * ops can be used (under OSF/1) to set the fpcr that should 661 * be used when a signal handler starts executing. 662 */ 663 break; 664 665 case GSI_UACPROC: 666 if (nbytes < sizeof(unsigned int)) 667 return -EINVAL; 668 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; 669 if (put_user(w, (unsigned int __user *)buffer)) 670 return -EFAULT; 671 return 1; 672 673 case GSI_PROC_TYPE: 674 if (nbytes < sizeof(unsigned long)) 675 return -EINVAL; 676 cpu = (struct percpu_struct*) 677 ((char*)hwrpb + hwrpb->processor_offset); 678 w = cpu->type; 679 if (put_user(w, (unsigned long __user*)buffer)) 680 return -EFAULT; 681 return 1; 682 683 case GSI_GET_HWRPB: 684 if (nbytes < sizeof(*hwrpb)) 685 return -EINVAL; 686 if (copy_to_user(buffer, hwrpb, nbytes) != 0) 687 return -EFAULT; 688 return 1; 689 690 default: 691 break; 692 } 693 694 return -EOPNOTSUPP; 695} 696 697asmlinkage unsigned long 698osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, 699 int __user *start, void __user *arg) 700{ 701 switch (op) { 702 case SSI_IEEE_FP_CONTROL: { 703 unsigned long swcr, fpcr; 704 unsigned int *state; 705 706 /* 707 * Alpha Architecture Handbook 4.7.7.3: 708 * To be fully IEEE compiant, we must track the current IEEE 709 * exception state in software, because spurrious bits can be 710 * set in the trap shadow of a software-complete insn. 711 */ 712 713 if (get_user(swcr, (unsigned long __user *)buffer)) 714 return -EFAULT; 715 state = ¤t_thread_info()->ieee_state; 716 717 /* Update softare trap enable bits. */ 718 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); 719 720 /* Update the real fpcr. */ 721 fpcr = rdfpcr() & FPCR_DYN_MASK; 722 fpcr |= ieee_swcr_to_fpcr(swcr); 723 wrfpcr(fpcr); 724 725 return 0; 726 } 727 728 case SSI_IEEE_RAISE_EXCEPTION: { 729 unsigned long exc, swcr, fpcr, fex; 730 unsigned int *state; 731 732 if (get_user(exc, (unsigned long __user *)buffer)) 733 return -EFAULT; 734 state = ¤t_thread_info()->ieee_state; 735 exc &= IEEE_STATUS_MASK; 736 737 /* Update softare trap enable bits. */ 738 swcr = (*state & IEEE_SW_MASK) | exc; 739 *state |= exc; 740 741 /* Update the real fpcr. */ 742 fpcr = rdfpcr(); 743 fpcr |= ieee_swcr_to_fpcr(swcr); 744 wrfpcr(fpcr); 745 746 /* If any exceptions set by this call, and are unmasked, 747 send a signal. Old exceptions are not signaled. */ 748 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; 749 if (fex) { 750 siginfo_t info; 751 int si_code = 0; 752 753 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; 754 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; 755 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; 756 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; 757 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; 758 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; 759 760 info.si_signo = SIGFPE; 761 info.si_errno = 0; 762 info.si_code = si_code; 763 info.si_addr = NULL; 764 send_sig_info(SIGFPE, &info, current); 765 } 766 return 0; 767 } 768 769 case SSI_IEEE_STATE_AT_SIGNAL: 770 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: 771 /* 772 * Not sure anybody will ever use this weird stuff. These 773 * ops can be used (under OSF/1) to set the fpcr that should 774 * be used when a signal handler starts executing. 775 */ 776 break; 777 778 case SSI_NVPAIRS: { 779 unsigned long v, w, i; 780 unsigned int old, new; 781 782 for (i = 0; i < nbytes; ++i) { 783 784 if (get_user(v, 2*i + (unsigned int __user *)buffer)) 785 return -EFAULT; 786 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) 787 return -EFAULT; 788 switch (v) { 789 case SSIN_UACPROC: 790 again: 791 old = current_thread_info()->flags; 792 new = old & ~(UAC_BITMASK << UAC_SHIFT); 793 new = new | (w & UAC_BITMASK) << UAC_SHIFT; 794 if (cmpxchg(¤t_thread_info()->flags, 795 old, new) != old) 796 goto again; 797 break; 798 799 default: 800 return -EOPNOTSUPP; 801 } 802 } 803 return 0; 804 } 805 806 default: 807 break; 808 } 809 810 return -EOPNOTSUPP; 811} 812 813/* Translations due to the fact that OSF's time_t is an int. Which 814 affects all sorts of things, like timeval and itimerval. */ 815 816extern struct timezone sys_tz; 817 818struct timeval32 819{ 820 int tv_sec, tv_usec; 821}; 822 823struct itimerval32 824{ 825 struct timeval32 it_interval; 826 struct timeval32 it_value; 827}; 828 829static inline long 830get_tv32(struct timeval *o, struct timeval32 __user *i) 831{ 832 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 833 (__get_user(o->tv_sec, &i->tv_sec) | 834 __get_user(o->tv_usec, &i->tv_usec))); 835} 836 837static inline long 838put_tv32(struct timeval32 __user *o, struct timeval *i) 839{ 840 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 841 (__put_user(i->tv_sec, &o->tv_sec) | 842 __put_user(i->tv_usec, &o->tv_usec))); 843} 844 845static inline long 846get_it32(struct itimerval *o, struct itimerval32 __user *i) 847{ 848 return (!access_ok(VERIFY_READ, i, sizeof(*i)) || 849 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | 850 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | 851 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | 852 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); 853} 854 855static inline long 856put_it32(struct itimerval32 __user *o, struct itimerval *i) 857{ 858 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || 859 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | 860 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | 861 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | 862 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); 863} 864 865static inline void 866jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) 867{ 868 value->tv_usec = (jiffies % HZ) * (1000000L / HZ); 869 value->tv_sec = jiffies / HZ; 870} 871 872asmlinkage int 873osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 874{ 875 if (tv) { 876 struct timeval ktv; 877 do_gettimeofday(&ktv); 878 if (put_tv32(tv, &ktv)) 879 return -EFAULT; 880 } 881 if (tz) { 882 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) 883 return -EFAULT; 884 } 885 return 0; 886} 887 888asmlinkage int 889osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) 890{ 891 struct timespec kts; 892 struct timezone ktz; 893 894 if (tv) { 895 if (get_tv32((struct timeval *)&kts, tv)) 896 return -EFAULT; 897 } 898 if (tz) { 899 if (copy_from_user(&ktz, tz, sizeof(*tz))) 900 return -EFAULT; 901 } 902 903 kts.tv_nsec *= 1000; 904 905 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); 906} 907 908asmlinkage int 909osf_getitimer(int which, struct itimerval32 __user *it) 910{ 911 struct itimerval kit; 912 int error; 913 914 error = do_getitimer(which, &kit); 915 if (!error && put_it32(it, &kit)) 916 error = -EFAULT; 917 918 return error; 919} 920 921asmlinkage int 922osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) 923{ 924 struct itimerval kin, kout; 925 int error; 926 927 if (in) { 928 if (get_it32(&kin, in)) 929 return -EFAULT; 930 } else 931 memset(&kin, 0, sizeof(kin)); 932 933 error = do_setitimer(which, &kin, out ? &kout : NULL); 934 if (error || !out) 935 return error; 936 937 if (put_it32(out, &kout)) 938 return -EFAULT; 939 940 return 0; 941 942} 943 944asmlinkage int 945osf_utimes(char __user *filename, struct timeval32 __user *tvs) 946{ 947 struct timespec tv[2]; 948 949 if (tvs) { 950 struct timeval ktvs[2]; 951 if (get_tv32(&ktvs[0], &tvs[0]) || 952 get_tv32(&ktvs[1], &tvs[1])) 953 return -EFAULT; 954 955 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || 956 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) 957 return -EINVAL; 958 959 tv[0].tv_sec = ktvs[0].tv_sec; 960 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; 961 tv[1].tv_sec = ktvs[1].tv_sec; 962 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; 963 } 964 965 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); 966} 967 968#define MAX_SELECT_SECONDS \ 969 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) 970 971asmlinkage int 972osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, 973 struct timeval32 __user *tvp) 974{ 975 fd_set_bits fds; 976 char *bits; 977 size_t size; 978 long timeout; 979 int ret = -EINVAL; 980 struct fdtable *fdt; 981 int max_fds; 982 983 timeout = MAX_SCHEDULE_TIMEOUT; 984 if (tvp) { 985 time_t sec, usec; 986 987 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) 988 || __get_user(sec, &tvp->tv_sec) 989 || __get_user(usec, &tvp->tv_usec)) { 990 ret = -EFAULT; 991 goto out_nofds; 992 } 993 994 if (sec < 0 || usec < 0) 995 goto out_nofds; 996 997 if ((unsigned long) sec < MAX_SELECT_SECONDS) { 998 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); 999 timeout += sec * (unsigned long) HZ; 1000 } 1001 } 1002 1003 rcu_read_lock(); 1004 fdt = files_fdtable(current->files); 1005 max_fds = fdt->max_fds; 1006 rcu_read_unlock(); 1007 if (n < 0 || n > max_fds) 1008 goto out_nofds; 1009 1010 /* 1011 * We need 6 bitmaps (in/out/ex for both incoming and outgoing), 1012 * since we used fdset we need to allocate memory in units of 1013 * long-words. 1014 */ 1015 ret = -ENOMEM; 1016 size = FDS_BYTES(n); 1017 bits = kmalloc(6 * size, GFP_KERNEL); 1018 if (!bits) 1019 goto out_nofds; 1020 fds.in = (unsigned long *) bits; 1021 fds.out = (unsigned long *) (bits + size); 1022 fds.ex = (unsigned long *) (bits + 2*size); 1023 fds.res_in = (unsigned long *) (bits + 3*size); 1024 fds.res_out = (unsigned long *) (bits + 4*size); 1025 fds.res_ex = (unsigned long *) (bits + 5*size); 1026 1027 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || 1028 (ret = get_fd_set(n, outp->fds_bits, fds.out)) || 1029 (ret = get_fd_set(n, exp->fds_bits, fds.ex))) 1030 goto out; 1031 zero_fd_set(n, fds.res_in); 1032 zero_fd_set(n, fds.res_out); 1033 zero_fd_set(n, fds.res_ex); 1034 1035 ret = do_select(n, &fds, &timeout); 1036 1037 /* OSF does not copy back the remaining time. */ 1038 1039 if (ret < 0) 1040 goto out; 1041 if (!ret) { 1042 ret = -ERESTARTNOHAND; 1043 if (signal_pending(current)) 1044 goto out; 1045 ret = 0; 1046 } 1047 1048 if (set_fd_set(n, inp->fds_bits, fds.res_in) || 1049 set_fd_set(n, outp->fds_bits, fds.res_out) || 1050 set_fd_set(n, exp->fds_bits, fds.res_ex)) 1051 ret = -EFAULT; 1052 1053 out: 1054 kfree(bits); 1055 out_nofds: 1056 return ret; 1057} 1058 1059struct 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 1078asmlinkage int 1079osf_getrusage(int who, struct rusage32 __user *ru) 1080{ 1081 struct rusage32 r; 1082 1083 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) 1084 return -EINVAL; 1085 1086 memset(&r, 0, sizeof(r)); 1087 switch (who) { 1088 case RUSAGE_SELF: 1089 jiffies_to_timeval32(current->utime, &r.ru_utime); 1090 jiffies_to_timeval32(current->stime, &r.ru_stime); 1091 r.ru_minflt = current->min_flt; 1092 r.ru_majflt = current->maj_flt; 1093 break; 1094 case RUSAGE_CHILDREN: 1095 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); 1096 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); 1097 r.ru_minflt = current->signal->cmin_flt; 1098 r.ru_majflt = current->signal->cmaj_flt; 1099 break; 1100 } 1101 1102 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; 1103} 1104 1105asmlinkage long 1106osf_wait4(pid_t pid, int __user *ustatus, int options, 1107 struct rusage32 __user *ur) 1108{ 1109 struct rusage r; 1110 long ret, err; 1111 mm_segment_t old_fs; 1112 1113 if (!ur) 1114 return sys_wait4(pid, ustatus, options, NULL); 1115 1116 old_fs = get_fs(); 1117 1118 set_fs (KERNEL_DS); 1119 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); 1120 set_fs (old_fs); 1121 1122 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) 1123 return -EFAULT; 1124 1125 err = 0; 1126 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); 1127 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); 1128 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); 1129 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); 1130 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); 1131 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); 1132 err |= __put_user(r.ru_idrss, &ur->ru_idrss); 1133 err |= __put_user(r.ru_isrss, &ur->ru_isrss); 1134 err |= __put_user(r.ru_minflt, &ur->ru_minflt); 1135 err |= __put_user(r.ru_majflt, &ur->ru_majflt); 1136 err |= __put_user(r.ru_nswap, &ur->ru_nswap); 1137 err |= __put_user(r.ru_inblock, &ur->ru_inblock); 1138 err |= __put_user(r.ru_oublock, &ur->ru_oublock); 1139 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); 1140 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); 1141 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); 1142 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); 1143 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); 1144 1145 return err ? err : ret; 1146} 1147 1148/* 1149 * I don't know what the parameters are: the first one 1150 * seems to be a timeval pointer, and I suspect the second 1151 * one is the time remaining.. Ho humm.. No documentation. 1152 */ 1153asmlinkage int 1154osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) 1155{ 1156 struct timeval tmp; 1157 unsigned long ticks; 1158 1159 if (get_tv32(&tmp, sleep)) 1160 goto fault; 1161 1162 ticks = timeval_to_jiffies(&tmp); 1163 1164 ticks = schedule_timeout_interruptible(ticks); 1165 1166 if (remain) { 1167 jiffies_to_timeval(ticks, &tmp); 1168 if (put_tv32(remain, &tmp)) 1169 goto fault; 1170 } 1171 1172 return 0; 1173 fault: 1174 return -EFAULT; 1175} 1176 1177 1178struct timex32 { 1179 unsigned int modes; /* mode selector */ 1180 long offset; /* time offset (usec) */ 1181 long freq; /* frequency offset (scaled ppm) */ 1182 long maxerror; /* maximum error (usec) */ 1183 long esterror; /* estimated error (usec) */ 1184 int status; /* clock command/status */ 1185 long constant; /* pll time constant */ 1186 long precision; /* clock precision (usec) (read only) */ 1187 long tolerance; /* clock frequency tolerance (ppm) 1188 * (read only) 1189 */ 1190 struct timeval32 time; /* (read only) */ 1191 long tick; /* (modified) usecs between clock ticks */ 1192 1193 long ppsfreq; /* pps frequency (scaled ppm) (ro) */ 1194 long jitter; /* pps jitter (us) (ro) */ 1195 int shift; /* interval duration (s) (shift) (ro) */ 1196 long stabil; /* pps stability (scaled ppm) (ro) */ 1197 long jitcnt; /* jitter limit exceeded (ro) */ 1198 long calcnt; /* calibration intervals (ro) */ 1199 long errcnt; /* calibration errors (ro) */ 1200 long stbcnt; /* stability limit exceeded (ro) */ 1201 1202 int :32; int :32; int :32; int :32; 1203 int :32; int :32; int :32; int :32; 1204 int :32; int :32; int :32; int :32; 1205}; 1206 1207asmlinkage int 1208sys_old_adjtimex(struct timex32 __user *txc_p) 1209{ 1210 struct timex txc; 1211 int ret; 1212 1213 /* copy relevant bits of struct timex. */ 1214 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || 1215 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 1216 offsetof(struct timex32, time))) 1217 return -EFAULT; 1218 1219 ret = do_adjtimex(&txc); 1220 if (ret < 0) 1221 return ret; 1222 1223 /* copy back to timex32 */ 1224 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || 1225 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 1226 offsetof(struct timex32, tick))) || 1227 (put_tv32(&txc_p->time, &txc.time))) 1228 return -EFAULT; 1229 1230 return ret; 1231} 1232 1233/* Get an address range which is currently unmapped. Similar to the 1234 generic version except that we know how to honor ADDR_LIMIT_32BIT. */ 1235 1236static unsigned long 1237arch_get_unmapped_area_1(unsigned long addr, unsigned long len, 1238 unsigned long limit) 1239{ 1240 struct vm_area_struct *vma = find_vma(current->mm, addr); 1241 1242 while (1) { 1243 /* At this point: (!vma || addr < vma->vm_end). */ 1244 if (limit - len < addr) 1245 return -ENOMEM; 1246 if (!vma || addr + len <= vma->vm_start) 1247 return addr; 1248 addr = vma->vm_end; 1249 vma = vma->vm_next; 1250 } 1251} 1252 1253unsigned long 1254arch_get_unmapped_area(struct file *filp, unsigned long addr, 1255 unsigned long len, unsigned long pgoff, 1256 unsigned long flags) 1257{ 1258 unsigned long limit; 1259 1260 /* "32 bit" actually means 31 bit, since pointers sign extend. */ 1261 if (current->personality & ADDR_LIMIT_32BIT) 1262 limit = 0x80000000; 1263 else 1264 limit = TASK_SIZE; 1265 1266 if (len > limit) 1267 return -ENOMEM; 1268 1269 if (flags & MAP_FIXED) 1270 return addr; 1271 1272 /* First, see if the given suggestion fits. 1273 1274 The OSF/1 loader (/sbin/loader) relies on us returning an 1275 address larger than the requested if one exists, which is 1276 a terribly broken way to program. 1277 1278 That said, I can see the use in being able to suggest not 1279 merely specific addresses, but regions of memory -- perhaps 1280 this feature should be incorporated into all ports? */ 1281 1282 if (addr) { 1283 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); 1284 if (addr != (unsigned long) -ENOMEM) 1285 return addr; 1286 } 1287 1288 /* Next, try allocating at TASK_UNMAPPED_BASE. */ 1289 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), 1290 len, limit); 1291 if (addr != (unsigned long) -ENOMEM) 1292 return addr; 1293 1294 /* Finally, try allocating in low memory. */ 1295 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); 1296 1297 return addr; 1298} 1299 1300#ifdef CONFIG_OSF4_COMPAT 1301 1302/* Clear top 32 bits of iov_len in the user's buffer for 1303 compatibility with old versions of OSF/1 where iov_len 1304 was defined as int. */ 1305static int 1306osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) 1307{ 1308 unsigned long i; 1309 1310 for (i = 0 ; i < count ; i++) { 1311 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; 1312 1313 if (put_user(0, iov_len_high)) 1314 return -EFAULT; 1315 } 1316 return 0; 1317} 1318 1319asmlinkage ssize_t 1320osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1321{ 1322 if (unlikely(personality(current->personality) == PER_OSF4)) 1323 if (osf_fix_iov_len(vector, count)) 1324 return -EFAULT; 1325 return sys_readv(fd, vector, count); 1326} 1327 1328asmlinkage ssize_t 1329osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) 1330{ 1331 if (unlikely(personality(current->personality) == PER_OSF4)) 1332 if (osf_fix_iov_len(vector, count)) 1333 return -EFAULT; 1334 return sys_writev(fd, vector, count); 1335} 1336 1337#endif 1338