arch/alpha/kernel/osf

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
SYSCALL_DEFINE1
SYSCALL_DEFINE4
osf_filldir
SYSCALL_DEFINE4
SYSCALL_DEFINE6
linux_to_osf_stat
linux_to_osf_statfs
linux_to_osf_statfs64
SYSCALL_DEFINE3
SYSCALL_DEFINE2
SYSCALL_DEFINE2
SYSCALL_DEFINE2
SYSCALL_DEFINE3
SYSCALL_DEFINE3
SYSCALL_DEFINE3
osf_ufs_mount
osf_cdfs_mount
osf_procfs_mount
SYSCALL_DEFINE4
SYSCALL_DEFINE1
SYSCALL_DEFINE0
SYSCALL_DEFINE0
SYSCALL_DEFINE2
SYSCALL_DEFINE2
SYSCALL_DEFINE2
SYSCALL_DEFINE3
SYSCALL_DEFINE5
SYSCALL_DEFINE5
get_tv32
put_tv32
put_tv_to_tv32
get_it32
put_it32
jiffies_to_timeval32
SYSCALL_DEFINE2
SYSCALL_DEFINE2
SYSCALL_DEFINE2
SYSCALL_DEFINE3
SYSCALL_DEFINE2
SYSCALL_DEFINE5
SYSCALL_DEFINE2
SYSCALL_DEFINE4
SYSCALL_DEFINE2
SYSCALL_DEFINE1
arch_get_unmapped_area_1
arch_get_unmapped_area
osf_fix_iov_len
SYSCALL_DEFINE3
SYSCALL_DEFINE3
SYSCALL_DEFINE2
SYSCALL_DEFINE0
SYSCALL_DEFINE0
SYSCALL_DEFINE0
SYSCALL_DEFINE0
SYSCALL_DEFINE1
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/alpha/kernel/osf_sys.c
   4  *
   5  *  Copyright (C) 1995  Linus Torvalds
   6  */
   7 
   8 /*
   9  * This file handles some of the stranger OSF/1 system call interfaces.
  10  * Some of the system calls expect a non-C calling standard, others have
  11  * special parameter blocks..
  12  */
  13 
  14 #include <linux/errno.h>
  15 #include <linux/sched/signal.h>
  16 #include <linux/sched/mm.h>
  17 #include <linux/sched/task_stack.h>
  18 #include <linux/sched/cputime.h>
  19 #include <linux/kernel.h>
  20 #include <linux/mm.h>
  21 #include <linux/smp.h>
  22 #include <linux/stddef.h>
  23 #include <linux/syscalls.h>
  24 #include <linux/unistd.h>
  25 #include <linux/ptrace.h>
  26 #include <linux/user.h>
  27 #include <linux/utsname.h>
  28 #include <linux/time.h>
  29 #include <linux/timex.h>
  30 #include <linux/major.h>
  31 #include <linux/stat.h>
  32 #include <linux/mman.h>
  33 #include <linux/shm.h>
  34 #include <linux/poll.h>
  35 #include <linux/file.h>
  36 #include <linux/types.h>
  37 #include <linux/ipc.h>
  38 #include <linux/namei.h>
  39 #include <linux/uio.h>
  40 #include <linux/vfs.h>
  41 #include <linux/rcupdate.h>
  42 #include <linux/slab.h>
  43 
  44 #include <asm/fpu.h>
  45 #include <asm/io.h>
  46 #include <linux/uaccess.h>
  47 #include <asm/sysinfo.h>
  48 #include <asm/thread_info.h>
  49 #include <asm/hwrpb.h>
  50 #include <asm/processor.h>
  51 
  52 /*
  53  * Brk needs to return an error.  Still support Linux's brk(0) query idiom,
  54  * which OSF programs just shouldn't be doing.  We're still not quite
  55  * identical to OSF as we don't return 0 on success, but doing otherwise
  56  * would require changes to libc.  Hopefully this is good enough.
  57  */
  58 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
  59 {
  60         unsigned long retval = sys_brk(brk);
  61         if (brk && brk != retval)
  62                 retval = -ENOMEM;
  63         return retval;
  64 }
  65  
  66 /*
  67  * This is pure guess-work..
  68  */
  69 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
  70                 unsigned long, text_len, unsigned long, bss_start,
  71                 unsigned long, bss_len)
  72 {
  73         struct mm_struct *mm;
  74 
  75         mm = current->mm;
  76         mm->end_code = bss_start + bss_len;
  77         mm->start_brk = bss_start + bss_len;
  78         mm->brk = bss_start + bss_len;
  79 #if 0
  80         printk("set_program_attributes(%lx %lx %lx %lx)\n",
  81                 text_start, text_len, bss_start, bss_len);
  82 #endif
  83         return 0;
  84 }
  85 
  86 /*
  87  * OSF/1 directory handling functions...
  88  *
  89  * The "getdents()" interface is much more sane: the "basep" stuff is
  90  * braindamage (it can't really handle filesystems where the directory
  91  * offset differences aren't the same as "d_reclen").
  92  */
  93 #define NAME_OFFSET     offsetof (struct osf_dirent, d_name)
  94 
  95 struct osf_dirent {
  96         unsigned int d_ino;
  97         unsigned short d_reclen;
  98         unsigned short d_namlen;
  99         char d_name[1];
 100 };
 101 
 102 struct osf_dirent_callback {
 103         struct dir_context ctx;
 104         struct osf_dirent __user *dirent;
 105         long __user *basep;
 106         unsigned int count;
 107         int error;
 108 };
 109 
 110 static int
 111 osf_filldir(struct dir_context *ctx, const char *name, int namlen,
 112             loff_t offset, u64 ino, unsigned int d_type)
 113 {
 114         struct osf_dirent __user *dirent;
 115         struct osf_dirent_callback *buf =
 116                 container_of(ctx, struct osf_dirent_callback, ctx);
 117         unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
 118         unsigned int d_ino;
 119 
 120         buf->error = -EINVAL;   /* only used if we fail */
 121         if (reclen > buf->count)
 122                 return -EINVAL;
 123         d_ino = ino;
 124         if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
 125                 buf->error = -EOVERFLOW;
 126                 return -EOVERFLOW;
 127         }
 128         if (buf->basep) {
 129                 if (put_user(offset, buf->basep))
 130                         goto Efault;
 131                 buf->basep = NULL;
 132         }
 133         dirent = buf->dirent;
 134         if (put_user(d_ino, &dirent->d_ino) ||
 135             put_user(namlen, &dirent->d_namlen) ||
 136             put_user(reclen, &dirent->d_reclen) ||
 137             copy_to_user(dirent->d_name, name, namlen) ||
 138             put_user(0, dirent->d_name + namlen))
 139                 goto Efault;
 140         dirent = (void __user *)dirent + reclen;
 141         buf->dirent = dirent;
 142         buf->count -= reclen;
 143         return 0;
 144 Efault:
 145         buf->error = -EFAULT;
 146         return -EFAULT;
 147 }
 148 
 149 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
 150                 struct osf_dirent __user *, dirent, unsigned int, count,
 151                 long __user *, basep)
 152 {
 153         int error;
 154         struct fd arg = fdget_pos(fd);
 155         struct osf_dirent_callback buf = {
 156                 .ctx.actor = osf_filldir,
 157                 .dirent = dirent,
 158                 .basep = basep,
 159                 .count = count
 160         };
 161 
 162         if (!arg.file)
 163                 return -EBADF;
 164 
 165         error = iterate_dir(arg.file, &buf.ctx);
 166         if (error >= 0)
 167                 error = buf.error;
 168         if (count != buf.count)
 169                 error = count - buf.count;
 170 
 171         fdput_pos(arg);
 172         return error;
 173 }
 174 
 175 #undef NAME_OFFSET
 176 
 177 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
 178                 unsigned long, prot, unsigned long, flags, unsigned long, fd,
 179                 unsigned long, off)
 180 {
 181         unsigned long ret = -EINVAL;
 182 
 183 #if 0
 184         if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
 185                 printk("%s: unimplemented OSF mmap flags %04lx\n", 
 186                         current->comm, flags);
 187 #endif
 188         if ((off + PAGE_ALIGN(len)) < off)
 189                 goto out;
 190         if (off & ~PAGE_MASK)
 191                 goto out;
 192         ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
 193  out:
 194         return ret;
 195 }
 196 
 197 struct osf_stat {
 198         int             st_dev;
 199         int             st_pad1;
 200         unsigned        st_mode;
 201         unsigned short  st_nlink;
 202         short           st_nlink_reserved;
 203         unsigned        st_uid;
 204         unsigned        st_gid;
 205         int             st_rdev;
 206         int             st_ldev;
 207         long            st_size;
 208         int             st_pad2;
 209         int             st_uatime;
 210         int             st_pad3;
 211         int             st_umtime;
 212         int             st_pad4;
 213         int             st_uctime;
 214         int             st_pad5;
 215         int             st_pad6;
 216         unsigned        st_flags;
 217         unsigned        st_gen;
 218         long            st_spare[4];
 219         unsigned        st_ino;
 220         int             st_ino_reserved;
 221         int             st_atime;
 222         int             st_atime_reserved;
 223         int             st_mtime;
 224         int             st_mtime_reserved;
 225         int             st_ctime;
 226         int             st_ctime_reserved;
 227         long            st_blksize;
 228         long            st_blocks;
 229 };
 230 
 231 /*
 232  * The OSF/1 statfs structure is much larger, but this should
 233  * match the beginning, at least.
 234  */
 235 struct osf_statfs {
 236         short f_type;
 237         short f_flags;
 238         int f_fsize;
 239         int f_bsize;
 240         int f_blocks;
 241         int f_bfree;
 242         int f_bavail;
 243         int f_files;
 244         int f_ffree;
 245         __kernel_fsid_t f_fsid;
 246 };
 247 
 248 struct osf_statfs64 {
 249         short f_type;
 250         short f_flags;
 251         int f_pad1;
 252         int f_pad2;
 253         int f_pad3;
 254         int f_pad4;
 255         int f_pad5;
 256         int f_pad6;
 257         int f_pad7;
 258         __kernel_fsid_t f_fsid;
 259         u_short f_namemax;
 260         short f_reserved1;
 261         int f_spare[8];
 262         char f_pad8[90];
 263         char f_pad9[90];
 264         long mount_info[10];
 265         u_long f_flags2;
 266         long f_spare2[14];
 267         long f_fsize;
 268         long f_bsize;
 269         long f_blocks;
 270         long f_bfree;
 271         long f_bavail;
 272         long f_files;
 273         long f_ffree;
 274 };
 275 
 276 static int
 277 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
 278 {
 279         struct osf_stat tmp = { 0 };
 280 
 281         tmp.st_dev      = lstat->dev;
 282         tmp.st_mode     = lstat->mode;
 283         tmp.st_nlink    = lstat->nlink;
 284         tmp.st_uid      = from_kuid_munged(current_user_ns(), lstat->uid);
 285         tmp.st_gid      = from_kgid_munged(current_user_ns(), lstat->gid);
 286         tmp.st_rdev     = lstat->rdev;
 287         tmp.st_ldev     = lstat->rdev;
 288         tmp.st_size     = lstat->size;
 289         tmp.st_uatime   = lstat->atime.tv_nsec / 1000;
 290         tmp.st_umtime   = lstat->mtime.tv_nsec / 1000;
 291         tmp.st_uctime   = lstat->ctime.tv_nsec / 1000;
 292         tmp.st_ino      = lstat->ino;
 293         tmp.st_atime    = lstat->atime.tv_sec;
 294         tmp.st_mtime    = lstat->mtime.tv_sec;
 295         tmp.st_ctime    = lstat->ctime.tv_sec;
 296         tmp.st_blksize  = lstat->blksize;
 297         tmp.st_blocks   = lstat->blocks;
 298 
 299         return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
 300 }
 301 
 302 static int
 303 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
 304                     unsigned long bufsiz)
 305 {
 306         struct osf_statfs tmp_stat;
 307 
 308         tmp_stat.f_type = linux_stat->f_type;
 309         tmp_stat.f_flags = 0;   /* mount flags */
 310         tmp_stat.f_fsize = linux_stat->f_frsize;
 311         tmp_stat.f_bsize = linux_stat->f_bsize;
 312         tmp_stat.f_blocks = linux_stat->f_blocks;
 313         tmp_stat.f_bfree = linux_stat->f_bfree;
 314         tmp_stat.f_bavail = linux_stat->f_bavail;
 315         tmp_stat.f_files = linux_stat->f_files;
 316         tmp_stat.f_ffree = linux_stat->f_ffree;
 317         tmp_stat.f_fsid = linux_stat->f_fsid;
 318         if (bufsiz > sizeof(tmp_stat))
 319                 bufsiz = sizeof(tmp_stat);
 320         return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
 321 }
 322 
 323 static int
 324 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
 325                       unsigned long bufsiz)
 326 {
 327         struct osf_statfs64 tmp_stat = { 0 };
 328 
 329         tmp_stat.f_type = linux_stat->f_type;
 330         tmp_stat.f_fsize = linux_stat->f_frsize;
 331         tmp_stat.f_bsize = linux_stat->f_bsize;
 332         tmp_stat.f_blocks = linux_stat->f_blocks;
 333         tmp_stat.f_bfree = linux_stat->f_bfree;
 334         tmp_stat.f_bavail = linux_stat->f_bavail;
 335         tmp_stat.f_files = linux_stat->f_files;
 336         tmp_stat.f_ffree = linux_stat->f_ffree;
 337         tmp_stat.f_fsid = linux_stat->f_fsid;
 338         if (bufsiz > sizeof(tmp_stat))
 339                 bufsiz = sizeof(tmp_stat);
 340         return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
 341 }
 342 
 343 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
 344                 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
 345 {
 346         struct kstatfs linux_stat;
 347         int error = user_statfs(pathname, &linux_stat);
 348         if (!error)
 349                 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 350         return error;   
 351 }
 352 
 353 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
 354 {
 355         struct kstat stat;
 356         int error;
 357 
 358         error = vfs_stat(name, &stat);
 359         if (error)
 360                 return error;
 361 
 362         return linux_to_osf_stat(&stat, buf);
 363 }
 364 
 365 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
 366 {
 367         struct kstat stat;
 368         int error;
 369 
 370         error = vfs_lstat(name, &stat);
 371         if (error)
 372                 return error;
 373 
 374         return linux_to_osf_stat(&stat, buf);
 375 }
 376 
 377 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
 378 {
 379         struct kstat stat;
 380         int error;
 381 
 382         error = vfs_fstat(fd, &stat);
 383         if (error)
 384                 return error;
 385 
 386         return linux_to_osf_stat(&stat, buf);
 387 }
 388 
 389 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
 390                 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
 391 {
 392         struct kstatfs linux_stat;
 393         int error = fd_statfs(fd, &linux_stat);
 394         if (!error)
 395                 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 396         return error;
 397 }
 398 
 399 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
 400                 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
 401 {
 402         struct kstatfs linux_stat;
 403         int error = user_statfs(pathname, &linux_stat);
 404         if (!error)
 405                 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
 406         return error;
 407 }
 408 
 409 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
 410                 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
 411 {
 412         struct kstatfs linux_stat;
 413         int error = fd_statfs(fd, &linux_stat);
 414         if (!error)
 415                 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
 416         return error;
 417 }
 418 
 419 /*
 420  * Uhh.. OSF/1 mount parameters aren't exactly obvious..
 421  *
 422  * Although to be frank, neither are the native Linux/i386 ones..
 423  */
 424 struct ufs_args {
 425         char __user *devname;
 426         int flags;
 427         uid_t exroot;
 428 };
 429 
 430 struct cdfs_args {
 431         char __user *devname;
 432         int flags;
 433         uid_t exroot;
 434 
 435         /* This has lots more here, which Linux handles with the option block
 436            but I'm too lazy to do the translation into ASCII.  */
 437 };
 438 
 439 struct procfs_args {
 440         char __user *devname;
 441         int flags;
 442         uid_t exroot;
 443 };
 444 
 445 /*
 446  * We can't actually handle ufs yet, so we translate UFS mounts to
 447  * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
 448  * layout is so braindead it's a major headache doing it.
 449  *
 450  * Just how long ago was it written? OTOH our UFS driver may be still
 451  * unhappy with OSF UFS. [CHECKME]
 452  */
 453 static int
 454 osf_ufs_mount(const char __user *dirname,
 455               struct ufs_args __user *args, int flags)
 456 {
 457         int retval;
 458         struct cdfs_args tmp;
 459         struct filename *devname;
 460 
 461         retval = -EFAULT;
 462         if (copy_from_user(&tmp, args, sizeof(tmp)))
 463                 goto out;
 464         devname = getname(tmp.devname);
 465         retval = PTR_ERR(devname);
 466         if (IS_ERR(devname))
 467                 goto out;
 468         retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
 469         putname(devname);
 470  out:
 471         return retval;
 472 }
 473 
 474 static int
 475 osf_cdfs_mount(const char __user *dirname,
 476                struct cdfs_args __user *args, int flags)
 477 {
 478         int retval;
 479         struct cdfs_args tmp;
 480         struct filename *devname;
 481 
 482         retval = -EFAULT;
 483         if (copy_from_user(&tmp, args, sizeof(tmp)))
 484                 goto out;
 485         devname = getname(tmp.devname);
 486         retval = PTR_ERR(devname);
 487         if (IS_ERR(devname))
 488                 goto out;
 489         retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
 490         putname(devname);
 491  out:
 492         return retval;
 493 }
 494 
 495 static int
 496 osf_procfs_mount(const char __user *dirname,
 497                  struct procfs_args __user *args, int flags)
 498 {
 499         struct procfs_args tmp;
 500 
 501         if (copy_from_user(&tmp, args, sizeof(tmp)))
 502                 return -EFAULT;
 503 
 504         return do_mount("", dirname, "proc", flags, NULL);
 505 }
 506 
 507 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
 508                 int, flag, void __user *, data)
 509 {
 510         int retval;
 511 
 512         switch (typenr) {
 513         case 1:
 514                 retval = osf_ufs_mount(path, data, flag);
 515                 break;
 516         case 6:
 517                 retval = osf_cdfs_mount(path, data, flag);
 518                 break;
 519         case 9:
 520                 retval = osf_procfs_mount(path, data, flag);
 521                 break;
 522         default:
 523                 retval = -EINVAL;
 524                 printk("osf_mount(%ld, %x)\n", typenr, flag);
 525         }
 526 
 527         return retval;
 528 }
 529 
 530 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
 531 {
 532         char tmp[5 * 32];
 533 
 534         down_read(&uts_sem);
 535         memcpy(tmp + 0 * 32, utsname()->sysname, 32);
 536         memcpy(tmp + 1 * 32, utsname()->nodename, 32);
 537         memcpy(tmp + 2 * 32, utsname()->release, 32);
 538         memcpy(tmp + 3 * 32, utsname()->version, 32);
 539         memcpy(tmp + 4 * 32, utsname()->machine, 32);
 540         up_read(&uts_sem);
 541 
 542         if (copy_to_user(name, tmp, sizeof(tmp)))
 543                 return -EFAULT;
 544         return 0;
 545 }
 546 
 547 SYSCALL_DEFINE0(getpagesize)
 548 {
 549         return PAGE_SIZE;
 550 }
 551 
 552 SYSCALL_DEFINE0(getdtablesize)
 553 {
 554         return sysctl_nr_open;
 555 }
 556 
 557 /*
 558  * For compatibility with OSF/1 only.  Use utsname(2) instead.
 559  */
 560 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
 561 {
 562         int len;
 563         char *kname;
 564         char tmp[32];
 565 
 566         if (namelen < 0 || namelen > 32)
 567                 namelen = 32;
 568 
 569         down_read(&uts_sem);
 570         kname = utsname()->domainname;
 571         len = strnlen(kname, namelen);
 572         len = min(len + 1, namelen);
 573         memcpy(tmp, kname, len);
 574         up_read(&uts_sem);
 575 
 576         if (copy_to_user(name, tmp, len))
 577                 return -EFAULT;
 578         return 0;
 579 }
 580 
 581 /*
 582  * The following stuff should move into a header file should it ever
 583  * be labeled "officially supported."  Right now, there is just enough
 584  * support to avoid applications (such as tar) printing error
 585  * messages.  The attributes are not really implemented.
 586  */
 587 
 588 /*
 589  * Values for Property list entry flag
 590  */
 591 #define PLE_PROPAGATE_ON_COPY           0x1     /* cp(1) will copy entry
 592                                                    by default */
 593 #define PLE_FLAG_MASK                   0x1     /* Valid flag values */
 594 #define PLE_FLAG_ALL                    -1      /* All flag value */
 595 
 596 struct proplistname_args {
 597         unsigned int pl_mask;
 598         unsigned int pl_numnames;
 599         char **pl_names;
 600 };
 601 
 602 union pl_args {
 603         struct setargs {
 604                 char __user *path;
 605                 long follow;
 606                 long nbytes;
 607                 char __user *buf;
 608         } set;
 609         struct fsetargs {
 610                 long fd;
 611                 long nbytes;
 612                 char __user *buf;
 613         } fset;
 614         struct getargs {
 615                 char __user *path;
 616                 long follow;
 617                 struct proplistname_args __user *name_args;
 618                 long nbytes;
 619                 char __user *buf;
 620                 int __user *min_buf_size;
 621         } get;
 622         struct fgetargs {
 623                 long fd;
 624                 struct proplistname_args __user *name_args;
 625                 long nbytes;
 626                 char __user *buf;
 627                 int __user *min_buf_size;
 628         } fget;
 629         struct delargs {
 630                 char __user *path;
 631                 long follow;
 632                 struct proplistname_args __user *name_args;
 633         } del;
 634         struct fdelargs {
 635                 long fd;
 636                 struct proplistname_args __user *name_args;
 637         } fdel;
 638 };
 639 
 640 enum pl_code {
 641         PL_SET = 1, PL_FSET = 2,
 642         PL_GET = 3, PL_FGET = 4,
 643         PL_DEL = 5, PL_FDEL = 6
 644 };
 645 
 646 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
 647                 union pl_args __user *, args)
 648 {
 649         long error;
 650         int __user *min_buf_size_ptr;
 651 
 652         switch (code) {
 653         case PL_SET:
 654                 if (get_user(error, &args->set.nbytes))
 655                         error = -EFAULT;
 656                 break;
 657         case PL_FSET:
 658                 if (get_user(error, &args->fset.nbytes))
 659                         error = -EFAULT;
 660                 break;
 661         case PL_GET:
 662                 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
 663                 if (error)
 664                         break;
 665                 error = put_user(0, min_buf_size_ptr);
 666                 break;
 667         case PL_FGET:
 668                 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
 669                 if (error)
 670                         break;
 671                 error = put_user(0, min_buf_size_ptr);
 672                 break;
 673         case PL_DEL:
 674         case PL_FDEL:
 675                 error = 0;
 676                 break;
 677         default:
 678                 error = -EOPNOTSUPP;
 679                 break;
 680         };
 681         return error;
 682 }
 683 
 684 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
 685                 struct sigstack __user *, uoss)
 686 {
 687         unsigned long usp = rdusp();
 688         unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
 689         unsigned long oss_os = on_sig_stack(usp);
 690         int error;
 691 
 692         if (uss) {
 693                 void __user *ss_sp;
 694 
 695                 error = -EFAULT;
 696                 if (get_user(ss_sp, &uss->ss_sp))
 697                         goto out;
 698 
 699                 /* If the current stack was set with sigaltstack, don't
 700                    swap stacks while we are on it.  */
 701                 error = -EPERM;
 702                 if (current->sas_ss_sp && on_sig_stack(usp))
 703                         goto out;
 704 
 705                 /* Since we don't know the extent of the stack, and we don't
 706                    track onstack-ness, but rather calculate it, we must 
 707                    presume a size.  Ho hum this interface is lossy.  */
 708                 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
 709                 current->sas_ss_size = SIGSTKSZ;
 710         }
 711 
 712         if (uoss) {
 713                 error = -EFAULT;
 714                 if (put_user(oss_sp, &uoss->ss_sp) ||
 715                     put_user(oss_os, &uoss->ss_onstack))
 716                         goto out;
 717         }
 718 
 719         error = 0;
 720  out:
 721         return error;
 722 }
 723 
 724 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
 725 {
 726         const char *sysinfo_table[] = {
 727                 utsname()->sysname,
 728                 utsname()->nodename,
 729                 utsname()->release,
 730                 utsname()->version,
 731                 utsname()->machine,
 732                 "alpha",        /* instruction set architecture */
 733                 "dummy",        /* hardware serial number */
 734                 "dummy",        /* hardware manufacturer */
 735                 "dummy",        /* secure RPC domain */
 736         };
 737         unsigned long offset;
 738         const char *res;
 739         long len;
 740         char tmp[__NEW_UTS_LEN + 1];
 741 
 742         offset = command-1;
 743         if (offset >= ARRAY_SIZE(sysinfo_table)) {
 744                 /* Digital UNIX has a few unpublished interfaces here */
 745                 printk("sysinfo(%d)", command);
 746                 return -EINVAL;
 747         }
 748 
 749         down_read(&uts_sem);
 750         res = sysinfo_table[offset];
 751         len = strlen(res)+1;
 752         if ((unsigned long)len > (unsigned long)count)
 753                 len = count;
 754         memcpy(tmp, res, len);
 755         up_read(&uts_sem);
 756         if (copy_to_user(buf, tmp, len))
 757                 return -EFAULT;
 758         return 0;
 759 }
 760 
 761 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
 762                 unsigned long, nbytes, int __user *, start, void __user *, arg)
 763 {
 764         unsigned long w;
 765         struct percpu_struct *cpu;
 766 
 767         switch (op) {
 768         case GSI_IEEE_FP_CONTROL:
 769                 /* Return current software fp control & status bits.  */
 770                 /* Note that DU doesn't verify available space here.  */
 771 
 772                 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
 773                 w = swcr_update_status(w, rdfpcr());
 774                 if (put_user(w, (unsigned long __user *) buffer))
 775                         return -EFAULT;
 776                 return 0;
 777 
 778         case GSI_IEEE_STATE_AT_SIGNAL:
 779                 /*
 780                  * Not sure anybody will ever use this weird stuff.  These
 781                  * ops can be used (under OSF/1) to set the fpcr that should
 782                  * be used when a signal handler starts executing.
 783                  */
 784                 break;
 785 
 786         case GSI_UACPROC:
 787                 if (nbytes < sizeof(unsigned int))
 788                         return -EINVAL;
 789                 w = current_thread_info()->status & UAC_BITMASK;
 790                 if (put_user(w, (unsigned int __user *)buffer))
 791                         return -EFAULT;
 792                 return 1;
 793 
 794         case GSI_PROC_TYPE:
 795                 if (nbytes < sizeof(unsigned long))
 796                         return -EINVAL;
 797                 cpu = (struct percpu_struct*)
 798                   ((char*)hwrpb + hwrpb->processor_offset);
 799                 w = cpu->type;
 800                 if (put_user(w, (unsigned long  __user*)buffer))
 801                         return -EFAULT;
 802                 return 1;
 803 
 804         case GSI_GET_HWRPB:
 805                 if (nbytes > sizeof(*hwrpb))
 806                         return -EINVAL;
 807                 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
 808                         return -EFAULT;
 809                 return 1;
 810 
 811         default:
 812                 break;
 813         }
 814 
 815         return -EOPNOTSUPP;
 816 }
 817 
 818 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
 819                 unsigned long, nbytes, int __user *, start, void __user *, arg)
 820 {
 821         switch (op) {
 822         case SSI_IEEE_FP_CONTROL: {
 823                 unsigned long swcr, fpcr;
 824                 unsigned int *state;
 825 
 826                 /* 
 827                  * Alpha Architecture Handbook 4.7.7.3:
 828                  * To be fully IEEE compiant, we must track the current IEEE
 829                  * exception state in software, because spurious bits can be
 830                  * set in the trap shadow of a software-complete insn.
 831                  */
 832 
 833                 if (get_user(swcr, (unsigned long __user *)buffer))
 834                         return -EFAULT;
 835                 state = &current_thread_info()->ieee_state;
 836 
 837                 /* Update softare trap enable bits.  */
 838                 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
 839 
 840                 /* Update the real fpcr.  */
 841                 fpcr = rdfpcr() & FPCR_DYN_MASK;
 842                 fpcr |= ieee_swcr_to_fpcr(swcr);
 843                 wrfpcr(fpcr);
 844 
 845                 return 0;
 846         }
 847 
 848         case SSI_IEEE_RAISE_EXCEPTION: {
 849                 unsigned long exc, swcr, fpcr, fex;
 850                 unsigned int *state;
 851 
 852                 if (get_user(exc, (unsigned long __user *)buffer))
 853                         return -EFAULT;
 854                 state = &current_thread_info()->ieee_state;
 855                 exc &= IEEE_STATUS_MASK;
 856 
 857                 /* Update softare trap enable bits.  */
 858                 swcr = (*state & IEEE_SW_MASK) | exc;
 859                 *state |= exc;
 860 
 861                 /* Update the real fpcr.  */
 862                 fpcr = rdfpcr();
 863                 fpcr |= ieee_swcr_to_fpcr(swcr);
 864                 wrfpcr(fpcr);
 865 
 866                 /* If any exceptions set by this call, and are unmasked,
 867                    send a signal.  Old exceptions are not signaled.  */
 868                 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
 869                 if (fex) {
 870                         int si_code = FPE_FLTUNK;
 871 
 872                         if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
 873                         if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
 874                         if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
 875                         if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
 876                         if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
 877                         if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
 878 
 879                         send_sig_fault(SIGFPE, si_code,
 880                                        (void __user *)NULL,  /* FIXME */
 881                                        0, current);
 882                 }
 883                 return 0;
 884         }
 885 
 886         case SSI_IEEE_STATE_AT_SIGNAL:
 887         case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
 888                 /*
 889                  * Not sure anybody will ever use this weird stuff.  These
 890                  * ops can be used (under OSF/1) to set the fpcr that should
 891                  * be used when a signal handler starts executing.
 892                  */
 893                 break;
 894 
 895         case SSI_NVPAIRS: {
 896                 unsigned __user *p = buffer;
 897                 unsigned i;
 898                 
 899                 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
 900                         unsigned v, w, status;
 901 
 902                         if (get_user(v, p) || get_user(w, p + 1))
 903                                 return -EFAULT;
 904                         switch (v) {
 905                         case SSIN_UACPROC:
 906                                 w &= UAC_BITMASK;
 907                                 status = current_thread_info()->status;
 908                                 status = (status & ~UAC_BITMASK) | w;
 909                                 current_thread_info()->status = status;
 910                                 break;
 911  
 912                         default:
 913                                 return -EOPNOTSUPP;
 914                         }
 915                 }
 916                 return 0;
 917         }
 918  
 919         case SSI_LMF:
 920                 return 0;
 921 
 922         default:
 923                 break;
 924         }
 925 
 926         return -EOPNOTSUPP;
 927 }
 928 
 929 /* Translations due to the fact that OSF's time_t is an int.  Which
 930    affects all sorts of things, like timeval and itimerval.  */
 931 
 932 extern struct timezone sys_tz;
 933 
 934 struct timeval32
 935 {
 936     int tv_sec, tv_usec;
 937 };
 938 
 939 struct itimerval32
 940 {
 941     struct timeval32 it_interval;
 942     struct timeval32 it_value;
 943 };
 944 
 945 static inline long
 946 get_tv32(struct timespec64 *o, struct timeval32 __user *i)
 947 {
 948         struct timeval32 tv;
 949         if (copy_from_user(&tv, i, sizeof(struct timeval32)))
 950                 return -EFAULT;
 951         o->tv_sec = tv.tv_sec;
 952         o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
 953         return 0;
 954 }
 955 
 956 static inline long
 957 put_tv32(struct timeval32 __user *o, struct timespec64 *i)
 958 {
 959         return copy_to_user(o, &(struct timeval32){
 960                                 .tv_sec = i->tv_sec,
 961                                 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
 962                             sizeof(struct timeval32));
 963 }
 964 
 965 static inline long
 966 put_tv_to_tv32(struct timeval32 __user *o, struct timeval *i)
 967 {
 968         return copy_to_user(o, &(struct timeval32){
 969                                 .tv_sec = i->tv_sec,
 970                                 .tv_usec = i->tv_usec},
 971                             sizeof(struct timeval32));
 972 }
 973 
 974 static inline long
 975 get_it32(struct itimerval *o, struct itimerval32 __user *i)
 976 {
 977         struct itimerval32 itv;
 978         if (copy_from_user(&itv, i, sizeof(struct itimerval32)))
 979                 return -EFAULT;
 980         o->it_interval.tv_sec = itv.it_interval.tv_sec;
 981         o->it_interval.tv_usec = itv.it_interval.tv_usec;
 982         o->it_value.tv_sec = itv.it_value.tv_sec;
 983         o->it_value.tv_usec = itv.it_value.tv_usec;
 984         return 0;
 985 }
 986 
 987 static inline long
 988 put_it32(struct itimerval32 __user *o, struct itimerval *i)
 989 {
 990         return copy_to_user(o, &(struct itimerval32){
 991                                 .it_interval.tv_sec = o->it_interval.tv_sec,
 992                                 .it_interval.tv_usec = o->it_interval.tv_usec,
 993                                 .it_value.tv_sec = o->it_value.tv_sec,
 994                                 .it_value.tv_usec = o->it_value.tv_usec},
 995                             sizeof(struct itimerval32));
 996 }
 997 
 998 static inline void
 999 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
1000 {
1001         value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
1002         value->tv_sec = jiffies / HZ;
1003 }
1004 
1005 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1006                 struct timezone __user *, tz)
1007 {
1008         if (tv) {
1009                 struct timespec64 kts;
1010 
1011                 ktime_get_real_ts64(&kts);
1012                 if (put_tv32(tv, &kts))
1013                         return -EFAULT;
1014         }
1015         if (tz) {
1016                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1017                         return -EFAULT;
1018         }
1019         return 0;
1020 }
1021 
1022 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1023                 struct timezone __user *, tz)
1024 {
1025         struct timespec64 kts;
1026         struct timezone ktz;
1027 
1028         if (tv) {
1029                 if (get_tv32(&kts, tv))
1030                         return -EFAULT;
1031         }
1032         if (tz) {
1033                 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1034                         return -EFAULT;
1035         }
1036 
1037         return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1038 }
1039 
1040 asmlinkage long sys_ni_posix_timers(void);
1041 
1042 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1043 {
1044         struct itimerval kit;
1045         int error;
1046 
1047         if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1048                 return sys_ni_posix_timers();
1049 
1050         error = do_getitimer(which, &kit);
1051         if (!error && put_it32(it, &kit))
1052                 error = -EFAULT;
1053 
1054         return error;
1055 }
1056 
1057 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1058                 struct itimerval32 __user *, out)
1059 {
1060         struct itimerval kin, kout;
1061         int error;
1062 
1063         if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1064                 return sys_ni_posix_timers();
1065 
1066         if (in) {
1067                 if (get_it32(&kin, in))
1068                         return -EFAULT;
1069         } else
1070                 memset(&kin, 0, sizeof(kin));
1071 
1072         error = do_setitimer(which, &kin, out ? &kout : NULL);
1073         if (error || !out)
1074                 return error;
1075 
1076         if (put_it32(out, &kout))
1077                 return -EFAULT;
1078 
1079         return 0;
1080 
1081 }
1082 
1083 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1084                 struct timeval32 __user *, tvs)
1085 {
1086         struct timespec64 tv[2];
1087 
1088         if (tvs) {
1089                 if (get_tv32(&tv[0], &tvs[0]) ||
1090                     get_tv32(&tv[1], &tvs[1]))
1091                         return -EFAULT;
1092 
1093                 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1094                     tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1095                         return -EINVAL;
1096         }
1097 
1098         return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1099 }
1100 
1101 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1102                 fd_set __user *, exp, struct timeval32 __user *, tvp)
1103 {
1104         struct timespec64 end_time, *to = NULL;
1105         if (tvp) {
1106                 struct timespec64 tv;
1107                 to = &end_time;
1108 
1109                 if (get_tv32(&tv, tvp))
1110                         return -EFAULT;
1111 
1112                 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1113                         return -EINVAL;
1114 
1115                 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1116                         return -EINVAL;         
1117 
1118         }
1119 
1120         /* OSF does not copy back the remaining time.  */
1121         return core_sys_select(n, inp, outp, exp, to);
1122 }
1123 
1124 struct rusage32 {
1125         struct timeval32 ru_utime;      /* user time used */
1126         struct timeval32 ru_stime;      /* system time used */
1127         long    ru_maxrss;              /* maximum resident set size */
1128         long    ru_ixrss;               /* integral shared memory size */
1129         long    ru_idrss;               /* integral unshared data size */
1130         long    ru_isrss;               /* integral unshared stack size */
1131         long    ru_minflt;              /* page reclaims */
1132         long    ru_majflt;              /* page faults */
1133         long    ru_nswap;               /* swaps */
1134         long    ru_inblock;             /* block input operations */
1135         long    ru_oublock;             /* block output operations */
1136         long    ru_msgsnd;              /* messages sent */
1137         long    ru_msgrcv;              /* messages received */
1138         long    ru_nsignals;            /* signals received */
1139         long    ru_nvcsw;               /* voluntary context switches */
1140         long    ru_nivcsw;              /* involuntary " */
1141 };
1142 
1143 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1144 {
1145         struct rusage32 r;
1146         u64 utime, stime;
1147         unsigned long utime_jiffies, stime_jiffies;
1148 
1149         if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1150                 return -EINVAL;
1151 
1152         memset(&r, 0, sizeof(r));
1153         switch (who) {
1154         case RUSAGE_SELF:
1155                 task_cputime(current, &utime, &stime);
1156                 utime_jiffies = nsecs_to_jiffies(utime);
1157                 stime_jiffies = nsecs_to_jiffies(stime);
1158                 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1159                 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1160                 r.ru_minflt = current->min_flt;
1161                 r.ru_majflt = current->maj_flt;
1162                 break;
1163         case RUSAGE_CHILDREN:
1164                 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1165                 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1166                 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1167                 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1168                 r.ru_minflt = current->signal->cmin_flt;
1169                 r.ru_majflt = current->signal->cmaj_flt;
1170                 break;
1171         }
1172 
1173         return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1174 }
1175 
1176 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1177                 struct rusage32 __user *, ur)
1178 {
1179         struct rusage r;
1180         long err = kernel_wait4(pid, ustatus, options, &r);
1181         if (err <= 0)
1182                 return err;
1183         if (!ur)
1184                 return err;
1185         if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1186                 return -EFAULT;
1187         if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1188                 return -EFAULT;
1189         if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1190               sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1191                 return -EFAULT;
1192         return err;
1193 }
1194 
1195 /*
1196  * I don't know what the parameters are: the first one
1197  * seems to be a timeval pointer, and I suspect the second
1198  * one is the time remaining.. Ho humm.. No documentation.
1199  */
1200 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1201                 struct timeval32 __user *, remain)
1202 {
1203         struct timespec64 tmp;
1204         unsigned long ticks;
1205 
1206         if (get_tv32(&tmp, sleep))
1207                 goto fault;
1208 
1209         ticks = timespec64_to_jiffies(&tmp);
1210 
1211         ticks = schedule_timeout_interruptible(ticks);
1212 
1213         if (remain) {
1214                 jiffies_to_timespec64(ticks, &tmp);
1215                 if (put_tv32(remain, &tmp))
1216                         goto fault;
1217         }
1218         
1219         return 0;
1220  fault:
1221         return -EFAULT;
1222 }
1223 
1224 
1225 struct timex32 {
1226         unsigned int modes;     /* mode selector */
1227         long offset;            /* time offset (usec) */
1228         long freq;              /* frequency offset (scaled ppm) */
1229         long maxerror;          /* maximum error (usec) */
1230         long esterror;          /* estimated error (usec) */
1231         int status;             /* clock command/status */
1232         long constant;          /* pll time constant */
1233         long precision;         /* clock precision (usec) (read only) */
1234         long tolerance;         /* clock frequency tolerance (ppm)
1235                                  * (read only)
1236                                  */
1237         struct timeval32 time;  /* (read only) */
1238         long tick;              /* (modified) usecs between clock ticks */
1239 
1240         long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
1241         long jitter;            /* pps jitter (us) (ro) */
1242         int shift;              /* interval duration (s) (shift) (ro) */
1243         long stabil;            /* pps stability (scaled ppm) (ro) */
1244         long jitcnt;            /* jitter limit exceeded (ro) */
1245         long calcnt;            /* calibration intervals (ro) */
1246         long errcnt;            /* calibration errors (ro) */
1247         long stbcnt;            /* stability limit exceeded (ro) */
1248 
1249         int  :32; int  :32; int  :32; int  :32;
1250         int  :32; int  :32; int  :32; int  :32;
1251         int  :32; int  :32; int  :32; int  :32;
1252 };
1253 
1254 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1255 {
1256         struct __kernel_timex txc;
1257         int ret;
1258 
1259         /* copy relevant bits of struct timex. */
1260         if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1261             copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 
1262                            offsetof(struct timex32, tick)))
1263           return -EFAULT;
1264 
1265         ret = do_adjtimex(&txc);        
1266         if (ret < 0)
1267           return ret;
1268         
1269         /* copy back to timex32 */
1270         if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1271             (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 
1272                           offsetof(struct timex32, tick))) ||
1273             (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1274             (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1275           return -EFAULT;
1276 
1277         return ret;
1278 }
1279 
1280 /* Get an address range which is currently unmapped.  Similar to the
1281    generic version except that we know how to honor ADDR_LIMIT_32BIT.  */
1282 
1283 static unsigned long
1284 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1285                          unsigned long limit)
1286 {
1287         struct vm_unmapped_area_info info;
1288 
1289         info.flags = 0;
1290         info.length = len;
1291         info.low_limit = addr;
1292         info.high_limit = limit;
1293         info.align_mask = 0;
1294         info.align_offset = 0;
1295         return vm_unmapped_area(&info);
1296 }
1297 
1298 unsigned long
1299 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1300                        unsigned long len, unsigned long pgoff,
1301                        unsigned long flags)
1302 {
1303         unsigned long limit;
1304 
1305         /* "32 bit" actually means 31 bit, since pointers sign extend.  */
1306         if (current->personality & ADDR_LIMIT_32BIT)
1307                 limit = 0x80000000;
1308         else
1309                 limit = TASK_SIZE;
1310 
1311         if (len > limit)
1312                 return -ENOMEM;
1313 
1314         if (flags & MAP_FIXED)
1315                 return addr;
1316 
1317         /* First, see if the given suggestion fits.
1318 
1319            The OSF/1 loader (/sbin/loader) relies on us returning an
1320            address larger than the requested if one exists, which is
1321            a terribly broken way to program.
1322 
1323            That said, I can see the use in being able to suggest not
1324            merely specific addresses, but regions of memory -- perhaps
1325            this feature should be incorporated into all ports?  */
1326 
1327         if (addr) {
1328                 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1329                 if (addr != (unsigned long) -ENOMEM)
1330                         return addr;
1331         }
1332 
1333         /* Next, try allocating at TASK_UNMAPPED_BASE.  */
1334         addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1335                                          len, limit);
1336         if (addr != (unsigned long) -ENOMEM)
1337                 return addr;
1338 
1339         /* Finally, try allocating in low memory.  */
1340         addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1341 
1342         return addr;
1343 }
1344 
1345 #ifdef CONFIG_OSF4_COMPAT
1346 /* Clear top 32 bits of iov_len in the user's buffer for
1347    compatibility with old versions of OSF/1 where iov_len
1348    was defined as int. */
1349 static int
1350 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1351 {
1352         unsigned long i;
1353 
1354         for (i = 0 ; i < count ; i++) {
1355                 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1356 
1357                 if (put_user(0, iov_len_high))
1358                         return -EFAULT;
1359         }
1360         return 0;
1361 }
1362 #endif
1363 
1364 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1365                 const struct iovec __user *, vector, unsigned long, count)
1366 {
1367 #ifdef CONFIG_OSF4_COMPAT
1368         if (unlikely(personality(current->personality) == PER_OSF4))
1369                 if (osf_fix_iov_len(vector, count))
1370                         return -EFAULT;
1371 #endif
1372 
1373         return sys_readv(fd, vector, count);
1374 }
1375 
1376 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1377                 const struct iovec __user *, vector, unsigned long, count)
1378 {
1379 #ifdef CONFIG_OSF4_COMPAT
1380         if (unlikely(personality(current->personality) == PER_OSF4))
1381                 if (osf_fix_iov_len(vector, count))
1382                         return -EFAULT;
1383 #endif
1384         return sys_writev(fd, vector, count);
1385 }
1386 
1387 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1388 {
1389         int prio = sys_getpriority(which, who);
1390         if (prio >= 0) {
1391                 /* Return value is the unbiased priority, i.e. 20 - prio.
1392                    This does result in negative return values, so signal
1393                    no error */
1394                 force_successful_syscall_return();
1395                 prio = 20 - prio;
1396         }
1397         return prio;
1398 }
1399 
1400 SYSCALL_DEFINE0(getxuid)
1401 {
1402         current_pt_regs()->r20 = sys_geteuid();
1403         return sys_getuid();
1404 }
1405 
1406 SYSCALL_DEFINE0(getxgid)
1407 {
1408         current_pt_regs()->r20 = sys_getegid();
1409         return sys_getgid();
1410 }
1411 
1412 SYSCALL_DEFINE0(getxpid)
1413 {
1414         current_pt_regs()->r20 = sys_getppid();
1415         return sys_getpid();
1416 }
1417 
1418 SYSCALL_DEFINE0(alpha_pipe)
1419 {
1420         int fd[2];
1421         int res = do_pipe_flags(fd, 0);
1422         if (!res) {
1423                 /* The return values are in $0 and $20.  */
1424                 current_pt_regs()->r20 = fd[1];
1425                 res = fd[0];
1426         }
1427         return res;
1428 }
1429 
1430 SYSCALL_DEFINE1(sethae, unsigned long, val)
1431 {
1432         current_pt_regs()->hae = val;
1433         return 0;
1434 }
/* [<][>][^][v][top][bottom][index][help] */
root/arch/alpha/kernel/osf_sys.c

DEFINITIONS
