arch/powerpc/kernel/sys_ppc32.c

   1 /*
   2  * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 2001 IBM
   5  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * environment.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/sched.h>
  19 #include <linux/fs.h>
  20 #include <linux/mm.h>
  21 #include <linux/file.h>
  22 #include <linux/signal.h>
  23 #include <linux/resource.h>
  24 #include <linux/times.h>
  25 #include <linux/smp.h>
  26 #include <linux/sem.h>
  27 #include <linux/msg.h>
  28 #include <linux/shm.h>
  29 #include <linux/poll.h>
  30 #include <linux/personality.h>
  31 #include <linux/stat.h>
  32 #include <linux/mman.h>
  33 #include <linux/in.h>
  34 #include <linux/syscalls.h>
  35 #include <linux/unistd.h>
  36 #include <linux/sysctl.h>
  37 #include <linux/binfmts.h>
  38 #include <linux/security.h>
  39 #include <linux/compat.h>
  40 #include <linux/ptrace.h>
  41 #include <linux/elf.h>
  42 #include <linux/ipc.h>
  43 #include <linux/slab.h>
  44
  45 #include <asm/ptrace.h>
  46 #include <asm/types.h>
  47 #include <asm/uaccess.h>
  48 #include <asm/unistd.h>
  49 #include <asm/time.h>
  50 #include <asm/mmu_context.h>
  51 #include <asm/ppc-pci.h>
  52 #include <asm/syscalls.h>
  53
  54
  55 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
  56                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
  57                 compat_uptr_t tvp_x)
  58 {
  59         /* sign extend n */
  60         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
  61 }
  62
  63 /* Note: it is necessary to treat option as an unsigned int,
  64  * with the corresponding cast to a signed int to insure that the
  65  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
  66  * and the register representation of a signed int (msr in 64-bit mode) is performed.
  67  */
  68 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
  69 {
  70         return sys_sysfs((int)option, arg1, arg2);
  71 }
  72
  73 #ifdef CONFIG_SYSVIPC
  74 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
  75                u32 fifth)
  76 {
  77         int version;
  78
  79         version = call >> 16; /* hack for backward compatibility */
  80         call &= 0xffff;
  81
  82         switch (call) {
  83
  84         case SEMTIMEDOP:
  85                 if (fifth)
  86                         /* sign extend semid */
  87                         return compat_sys_semtimedop((int)first,
  88                                                      compat_ptr(ptr), second,
  89                                                      compat_ptr(fifth));
  90                 /* else fall through for normal semop() */
  91         case SEMOP:
  92                 /* struct sembuf is the same on 32 and 64bit :)) */
  93                 /* sign extend semid */
  94                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
  95                                       NULL);
  96         case SEMGET:
  97                 /* sign extend key, nsems */
  98                 return sys_semget((int)first, (int)second, third);
  99         case SEMCTL:
 100                 /* sign extend semid, semnum */
 101                 return compat_sys_semctl((int)first, (int)second, third,
 102                                          compat_ptr(ptr));
 103
 104         case MSGSND:
 105                 /* sign extend msqid */
 106                 return compat_sys_msgsnd((int)first, (int)second, third,
 107                                          compat_ptr(ptr));
 108         case MSGRCV:
 109                 /* sign extend msqid, msgtyp */
 110                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 111                                          third, version, compat_ptr(ptr));
 112         case MSGGET:
 113                 /* sign extend key */
 114                 return sys_msgget((int)first, second);
 115         case MSGCTL:
 116                 /* sign extend msqid */
 117                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 118
 119         case SHMAT:
 120                 /* sign extend shmid */
 121                 return compat_sys_shmat((int)first, second, third, version,
 122                                         compat_ptr(ptr));
 123         case SHMDT:
 124                 return sys_shmdt(compat_ptr(ptr));
 125         case SHMGET:
 126                 /* sign extend key_t */
 127                 return sys_shmget((int)first, second, third);
 128         case SHMCTL:
 129                 /* sign extend shmid */
 130                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 131
 132         default:
 133                 return -ENOSYS;
 134         }
 135
 136         return -ENOSYS;
 137 }
 138 #endif
 139
 140 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 141  * with the corresponding cast to a signed int to insure that the
 142  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 143  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 144  */
 145 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 146 {
 147         mm_segment_t old_fs = get_fs();
 148         int ret;
 149         off_t of;
 150         off_t __user *up;
 151
 152         if (offset && get_user(of, offset))
 153                 return -EFAULT;
 154
 155         /* The __user pointer cast is valid because of the set_fs() */
 156         set_fs(KERNEL_DS);
 157         up = offset ? (off_t __user *) &of : NULL;
 158         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 159         set_fs(old_fs);
 160
 161         if (offset && put_user(of, offset))
 162                 return -EFAULT;
 163
 164         return ret;
 165 }
 166
 167 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 168 {
 169         mm_segment_t old_fs = get_fs();
 170         int ret;
 171         loff_t lof;
 172         loff_t __user *up;
 173
 174         if (offset && get_user(lof, offset))
 175                 return -EFAULT;
 176
 177         /* The __user pointer cast is valid because of the set_fs() */
 178         set_fs(KERNEL_DS);
 179         up = offset ? (loff_t __user *) &lof : NULL;
 180         ret = sys_sendfile64(out_fd, in_fd, up, count);
 181         set_fs(old_fs);
 182
 183         if (offset && put_user(lof, offset))
 184                 return -EFAULT;
 185
 186         return ret;
 187 }
 188
 189 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 190                   unsigned long a3, unsigned long a4, unsigned long a5,
 191                   struct pt_regs *regs)
 192 {
 193         int error;
 194         char * filename;
 195
 196         filename = getname((char __user *) a0);
 197         error = PTR_ERR(filename);
 198         if (IS_ERR(filename))
 199                 goto out;
 200         flush_fp_to_thread(current);
 201         flush_altivec_to_thread(current);
 202
 203         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 204
 205         putname(filename);
 206
 207 out:
 208         return error;
 209 }
 210
 211 /* Note: it is necessary to treat option as an unsigned int,
 212  * with the corresponding cast to a signed int to insure that the
 213  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 214  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 215  */
 216 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 217 {
 218         return sys_prctl((int)option,
 219                          (unsigned long) arg2,
 220                          (unsigned long) arg3,
 221                          (unsigned long) arg4,
 222                          (unsigned long) arg5);
 223 }
 224
 225 /* Note: it is necessary to treat pid as an unsigned int,
 226  * with the corresponding cast to a signed int to insure that the
 227  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 228  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 229  */
 230 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 231 {
 232         struct timespec t;
 233         int ret;
 234         mm_segment_t old_fs = get_fs ();
 235
 236         /* The __user pointer cast is valid because of the set_fs() */
 237         set_fs (KERNEL_DS);
 238         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 239         set_fs (old_fs);
 240         if (put_compat_timespec(&t, interval))
 241                 return -EFAULT;
 242         return ret;
 243 }
 244
 245 /* Note: it is necessary to treat mode as an unsigned int,
 246  * with the corresponding cast to a signed int to insure that the
 247  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 248  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 249  */
 250 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 251 {
 252         return sys_access(filename, (int)mode);
 253 }
 254
 255
 256 /* Note: it is necessary to treat mode as an unsigned int,
 257  * with the corresponding cast to a signed int to insure that the
 258  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 259  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 260  */
 261 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 262 {
 263         return sys_creat(pathname, (int)mode);
 264 }
 265
 266
 267 /* Note: it is necessary to treat pid and options as unsigned ints,
 268  * with the corresponding cast to a signed int to insure that the
 269  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 270  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 271  */
 272 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 273 {
 274         return sys_waitpid((int)pid, stat_addr, (int)options);
 275 }
 276
 277
 278 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 279  * with the corresponding cast to a signed int to insure that the
 280  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 281  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 282  */
 283 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 284 {
 285         return sys_getgroups((int)gidsetsize, grouplist);
 286 }
 287
 288
 289 /* Note: it is necessary to treat pid as an unsigned int,
 290  * with the corresponding cast to a signed int to insure that the
 291  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 292  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 293  */
 294 asmlinkage long compat_sys_getpgid(u32 pid)
 295 {
 296         return sys_getpgid((int)pid);
 297 }
 298
 299
 300
 301 /* Note: it is necessary to treat pid as an unsigned int,
 302  * with the corresponding cast to a signed int to insure that the
 303  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 304  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 305  */
 306 asmlinkage long compat_sys_getsid(u32 pid)
 307 {
 308         return sys_getsid((int)pid);
 309 }
 310
 311
 312 /* Note: it is necessary to treat pid and sig as unsigned ints,
 313  * with the corresponding cast to a signed int to insure that the
 314  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 315  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 316  */
 317 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 318 {
 319         return sys_kill((int)pid, (int)sig);
 320 }
 321
 322
 323 /* Note: it is necessary to treat mode as an unsigned int,
 324  * with the corresponding cast to a signed int to insure that the
 325  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 326  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 327  */
 328 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 329 {
 330         return sys_mkdir(pathname, (int)mode);
 331 }
 332
 333 long compat_sys_nice(u32 increment)
 334 {
 335         /* sign extend increment */
 336         return sys_nice((int)increment);
 337 }
 338
 339 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 340 {
 341         /* sign extend n */
 342         return sys_lseek(fd, (int)offset, origin);
 343 }
 344
 345 long compat_sys_truncate(const char __user * path, u32 length)
 346 {
 347         /* sign extend length */
 348         return sys_truncate(path, (int)length);
 349 }
 350
 351 long compat_sys_ftruncate(int fd, u32 length)
 352 {
 353         /* sign extend length */
 354         return sys_ftruncate(fd, (int)length);
 355 }
 356
 357 /* Note: it is necessary to treat bufsiz as an unsigned int,
 358  * with the corresponding cast to a signed int to insure that the
 359  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 360  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 361  */
 362 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 363 {
 364         return sys_readlink(path, buf, (int)bufsiz);
 365 }
 366
 367 /* Note: it is necessary to treat option as an unsigned int,
 368  * with the corresponding cast to a signed int to insure that the
 369  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 370  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 371  */
 372 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 373 {
 374         return sys_sched_get_priority_max((int)policy);
 375 }
 376
 377
 378 /* Note: it is necessary to treat policy as an unsigned int,
 379  * with the corresponding cast to a signed int to insure that the
 380  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 381  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 382  */
 383 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 384 {
 385         return sys_sched_get_priority_min((int)policy);
 386 }
 387
 388
 389 /* Note: it is necessary to treat pid as an unsigned int,
 390  * with the corresponding cast to a signed int to insure that the
 391  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 392  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 393  */
 394 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 395 {
 396         return sys_sched_getparam((int)pid, param);
 397 }
 398
 399
 400 /* Note: it is necessary to treat pid as an unsigned int,
 401  * with the corresponding cast to a signed int to insure that the
 402  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 403  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 404  */
 405 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 406 {
 407         return sys_sched_getscheduler((int)pid);
 408 }
 409
 410
 411 /* Note: it is necessary to treat pid as an unsigned int,
 412  * with the corresponding cast to a signed int to insure that the
 413  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 414  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 415  */
 416 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 417 {
 418         return sys_sched_setparam((int)pid, param);
 419 }
 420
 421
 422 /* Note: it is necessary to treat pid and policy as unsigned ints,
 423  * with the corresponding cast to a signed int to insure that the
 424  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 425  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 426  */
 427 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 428 {
 429         return sys_sched_setscheduler((int)pid, (int)policy, param);
 430 }
 431
 432
 433 /* Note: it is necessary to treat len as an unsigned int,
 434  * with the corresponding cast to a signed int to insure that the
 435  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 436  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 437  */
 438 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 439 {
 440         return sys_setdomainname(name, (int)len);
 441 }
 442
 443
 444 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 445  * with the corresponding cast to a signed int to insure that the
 446  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 447  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 448  */
 449 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 450 {
 451         return sys_setgroups((int)gidsetsize, grouplist);
 452 }
 453
 454
 455 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 456 {
 457         /* sign extend len */
 458         return sys_sethostname(name, (int)len);
 459 }
 460
 461
 462 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 463  * with the corresponding cast to a signed int to insure that the
 464  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 465  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 466  */
 467 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 468 {
 469         return sys_setpgid((int)pid, (int)pgid);
 470 }
 471
 472 long compat_sys_getpriority(u32 which, u32 who)
 473 {
 474         /* sign extend which and who */
 475         return sys_getpriority((int)which, (int)who);
 476 }
 477
 478 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 479 {
 480         /* sign extend which, who and niceval */
 481         return sys_setpriority((int)which, (int)who, (int)niceval);
 482 }
 483
 484 long compat_sys_ioprio_get(u32 which, u32 who)
 485 {
 486         /* sign extend which and who */
 487         return sys_ioprio_get((int)which, (int)who);
 488 }
 489
 490 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 491 {
 492         /* sign extend which, who and ioprio */
 493         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 494 }
 495
 496 /* Note: it is necessary to treat newmask as an unsigned int,
 497  * with the corresponding cast to a signed int to insure that the
 498  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 499  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 500  */
 501 asmlinkage long compat_sys_ssetmask(u32 newmask)
 502 {
 503         return sys_ssetmask((int) newmask);
 504 }
 505
 506 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 507 {
 508         /* sign extend len */
 509         return sys_syslog(type, buf, (int)len);
 510 }
 511
 512
 513 /* Note: it is necessary to treat mask as an unsigned int,
 514  * with the corresponding cast to a signed int to insure that the
 515  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 516  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 517  */
 518 asmlinkage long compat_sys_umask(u32 mask)
 519 {
 520         return sys_umask((int)mask);
 521 }
 522
 523 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 524                           unsigned long prot, unsigned long flags,
 525                           unsigned long fd, unsigned long pgoff)
 526 {
 527         /* This should remain 12 even if PAGE_SIZE changes */
 528         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 529 }
 530
 531 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 532 {
 533         /* sign extend tgid, pid */
 534         return sys_tgkill((int)tgid, (int)pid, sig);
 535 }
 536
 537 /*
 538  * long long munging:
 539  * The 32 bit ABI passes long longs in an odd even register pair.
 540  */
 541
 542 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 543                              u32 reg6, u32 poshi, u32 poslo)
 544 {
 545         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 546 }
 547
 548 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
 549                               u32 reg6, u32 poshi, u32 poslo)
 550 {
 551         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 552 }
 553
 554 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 555 {
 556         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 557 }
 558
 559 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 560                                 unsigned long high, unsigned long low)
 561 {
 562         return sys_truncate(path, (high << 32) | low);
 563 }
 564
 565 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 566                                      u32 lenhi, u32 lenlo)
 567 {
 568         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 569                              ((loff_t)lenhi << 32) | lenlo);
 570 }
 571
 572 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 573                                  unsigned long low)
 574 {
 575         return sys_ftruncate(fd, (high << 32) | low);
 576 }
 577
 578 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 579                           size_t len)
 580 {
 581         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 582                                   buf, len);
 583 }
 584
 585 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 586                      size_t len, int advice)
 587 {
 588         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 589                              advice);
 590 }
 591
 592 asmlinkage long compat_sys_add_key(const char __user *_type,
 593                               const char __user *_description,
 594                               const void __user *_payload,
 595                               u32 plen,
 596                               u32 ringid)
 597 {
 598         return sys_add_key(_type, _description, _payload, plen, ringid);
 599 }
 600
 601 asmlinkage long compat_sys_request_key(const char __user *_type,
 602                                   const char __user *_description,
 603                                   const char __user *_callout_info,
 604                                   u32 destringid)
 605 {
 606         return sys_request_key(_type, _description, _callout_info, destringid);
 607 }
 608
 609 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 610                                    unsigned offset_hi, unsigned offset_lo,
 611                                    unsigned nbytes_hi, unsigned nbytes_lo)
 612 {
 613         loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 614         loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 615
 616         return sys_sync_file_range(fd, offset, nbytes, flags);
 617 }
 618
 619 asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
 620                                          unsigned mask_hi, unsigned mask_lo,
 621                                          int dfd, const char __user *pathname)
 622 {
 623         u64 mask = ((u64)mask_hi << 32) | mask_lo;
 624         return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
 625 }