linux/arch/powerpc/kernel/sys_ppc32.c
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   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/utsname.h>
  26#include <linux/smp.h>
  27#include <linux/smp_lock.h>
  28#include <linux/sem.h>
  29#include <linux/msg.h>
  30#include <linux/shm.h>
  31#include <linux/poll.h>
  32#include <linux/personality.h>
  33#include <linux/stat.h>
  34#include <linux/mman.h>
  35#include <linux/in.h>
  36#include <linux/syscalls.h>
  37#include <linux/unistd.h>
  38#include <linux/sysctl.h>
  39#include <linux/binfmts.h>
  40#include <linux/security.h>
  41#include <linux/compat.h>
  42#include <linux/ptrace.h>
  43#include <linux/elf.h>
  44#include <linux/ipc.h>
  45
  46#include <asm/ptrace.h>
  47#include <asm/types.h>
  48#include <asm/uaccess.h>
  49#include <asm/unistd.h>
  50#include <asm/time.h>
  51#include <asm/mmu_context.h>
  52#include <asm/ppc-pci.h>
  53#include <asm/syscalls.h>
  54
  55
  56asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
  57                compat_ulong_t __user *outp, compat_ulong_t __user *exp,
  58                compat_uptr_t tvp_x)
  59{
  60        /* sign extend n */
  61        return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
  62}
  63
  64/* Note: it is necessary to treat option as an unsigned int,
  65 * with the corresponding cast to a signed int to insure that the 
  66 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
  67 * and the register representation of a signed int (msr in 64-bit mode) is performed.
  68 */
  69asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
  70{
  71        return sys_sysfs((int)option, arg1, arg2);
  72}
  73
  74#ifdef CONFIG_SYSVIPC
  75long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
  76               u32 fifth)
  77{
  78        int version;
  79
  80        version = call >> 16; /* hack for backward compatibility */
  81        call &= 0xffff;
  82
  83        switch (call) {
  84
  85        case SEMTIMEDOP:
  86                if (fifth)
  87                        /* sign extend semid */
  88                        return compat_sys_semtimedop((int)first,
  89                                                     compat_ptr(ptr), second,
  90                                                     compat_ptr(fifth));
  91                /* else fall through for normal semop() */
  92        case SEMOP:
  93                /* struct sembuf is the same on 32 and 64bit :)) */
  94                /* sign extend semid */
  95                return sys_semtimedop((int)first, compat_ptr(ptr), second,
  96                                      NULL);
  97        case SEMGET:
  98                /* sign extend key, nsems */
  99                return sys_semget((int)first, (int)second, third);
 100        case SEMCTL:
 101                /* sign extend semid, semnum */
 102                return compat_sys_semctl((int)first, (int)second, third,
 103                                         compat_ptr(ptr));
 104
 105        case MSGSND:
 106                /* sign extend msqid */
 107                return compat_sys_msgsnd((int)first, (int)second, third,
 108                                         compat_ptr(ptr));
 109        case MSGRCV:
 110                /* sign extend msqid, msgtyp */
 111                return compat_sys_msgrcv((int)first, second, (int)fifth,
 112                                         third, version, compat_ptr(ptr));
 113        case MSGGET:
 114                /* sign extend key */
 115                return sys_msgget((int)first, second);
 116        case MSGCTL:
 117                /* sign extend msqid */
 118                return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 119
 120        case SHMAT:
 121                /* sign extend shmid */
 122                return compat_sys_shmat((int)first, second, third, version,
 123                                        compat_ptr(ptr));
 124        case SHMDT:
 125                return sys_shmdt(compat_ptr(ptr));
 126        case SHMGET:
 127                /* sign extend key_t */
 128                return sys_shmget((int)first, second, third);
 129        case SHMCTL:
 130                /* sign extend shmid */
 131                return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 132
 133        default:
 134                return -ENOSYS;
 135        }
 136
 137        return -ENOSYS;
 138}
 139#endif
 140
 141/* Note: it is necessary to treat out_fd and in_fd as unsigned ints, 
 142 * with the corresponding cast to a signed int to insure that the 
 143 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 144 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 145 */
 146asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 147{
 148        mm_segment_t old_fs = get_fs();
 149        int ret;
 150        off_t of;
 151        off_t __user *up;
 152
 153        if (offset && get_user(of, offset))
 154                return -EFAULT;
 155
 156        /* The __user pointer cast is valid because of the set_fs() */          
 157        set_fs(KERNEL_DS);
 158        up = offset ? (off_t __user *) &of : NULL;
 159        ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 160        set_fs(old_fs);
 161        
 162        if (offset && put_user(of, offset))
 163                return -EFAULT;
 164                
 165        return ret;
 166}
 167
 168asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 169{
 170        mm_segment_t old_fs = get_fs();
 171        int ret;
 172        loff_t lof;
 173        loff_t __user *up;
 174        
 175        if (offset && get_user(lof, offset))
 176                return -EFAULT;
 177                
 178        /* The __user pointer cast is valid because of the set_fs() */          
 179        set_fs(KERNEL_DS);
 180        up = offset ? (loff_t __user *) &lof : NULL;
 181        ret = sys_sendfile64(out_fd, in_fd, up, count);
 182        set_fs(old_fs);
 183        
 184        if (offset && put_user(lof, offset))
 185                return -EFAULT;
 186                
 187        return ret;
 188}
 189
 190long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 191                  unsigned long a3, unsigned long a4, unsigned long a5,
 192                  struct pt_regs *regs)
 193{
 194        int error;
 195        char * filename;
 196        
 197        filename = getname((char __user *) a0);
 198        error = PTR_ERR(filename);
 199        if (IS_ERR(filename))
 200                goto out;
 201        flush_fp_to_thread(current);
 202        flush_altivec_to_thread(current);
 203
 204        error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 205
 206        putname(filename);
 207
 208out:
 209        return error;
 210}
 211
 212/* Note: it is necessary to treat option as an unsigned int, 
 213 * with the corresponding cast to a signed int to insure that the 
 214 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 215 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 216 */
 217asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 218{
 219        return sys_prctl((int)option,
 220                         (unsigned long) arg2,
 221                         (unsigned long) arg3,
 222                         (unsigned long) arg4,
 223                         (unsigned long) arg5);
 224}
 225
 226/* Note: it is necessary to treat pid as an unsigned int, 
 227 * with the corresponding cast to a signed int to insure that the 
 228 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 229 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 230 */
 231asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 232{
 233        struct timespec t;
 234        int ret;
 235        mm_segment_t old_fs = get_fs ();
 236
 237        /* The __user pointer cast is valid because of the set_fs() */
 238        set_fs (KERNEL_DS);
 239        ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 240        set_fs (old_fs);
 241        if (put_compat_timespec(&t, interval))
 242                return -EFAULT;
 243        return ret;
 244}
 245
 246/* Note: it is necessary to treat mode as an unsigned int,
 247 * with the corresponding cast to a signed int to insure that the 
 248 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 249 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 250 */
 251asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 252{
 253        return sys_access(filename, (int)mode);
 254}
 255
 256
 257/* Note: it is necessary to treat mode as an unsigned int,
 258 * with the corresponding cast to a signed int to insure that the 
 259 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 260 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 261 */
 262asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 263{
 264        return sys_creat(pathname, (int)mode);
 265}
 266
 267
 268/* Note: it is necessary to treat pid and options as unsigned ints,
 269 * with the corresponding cast to a signed int to insure that the 
 270 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 271 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 272 */
 273asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 274{
 275        return sys_waitpid((int)pid, stat_addr, (int)options);
 276}
 277
 278
 279/* Note: it is necessary to treat gidsetsize as an unsigned int,
 280 * with the corresponding cast to a signed int to insure that the 
 281 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 282 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 283 */
 284asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 285{
 286        return sys_getgroups((int)gidsetsize, grouplist);
 287}
 288
 289
 290/* Note: it is necessary to treat pid as an unsigned int,
 291 * with the corresponding cast to a signed int to insure that the 
 292 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 293 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 294 */
 295asmlinkage long compat_sys_getpgid(u32 pid)
 296{
 297        return sys_getpgid((int)pid);
 298}
 299
 300
 301
 302/* Note: it is necessary to treat pid as an unsigned int,
 303 * with the corresponding cast to a signed int to insure that the 
 304 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 305 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 306 */
 307asmlinkage long compat_sys_getsid(u32 pid)
 308{
 309        return sys_getsid((int)pid);
 310}
 311
 312
 313/* Note: it is necessary to treat pid and sig as unsigned ints,
 314 * with the corresponding cast to a signed int to insure that the 
 315 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 316 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 317 */
 318asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 319{
 320        return sys_kill((int)pid, (int)sig);
 321}
 322
 323
 324/* Note: it is necessary to treat mode as an unsigned int,
 325 * with the corresponding cast to a signed int to insure that the 
 326 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 327 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 328 */
 329asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 330{
 331        return sys_mkdir(pathname, (int)mode);
 332}
 333
 334long compat_sys_nice(u32 increment)
 335{
 336        /* sign extend increment */
 337        return sys_nice((int)increment);
 338}
 339
 340off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 341{
 342        /* sign extend n */
 343        return sys_lseek(fd, (int)offset, origin);
 344}
 345
 346/* Note: it is necessary to treat bufsiz as an unsigned int,
 347 * with the corresponding cast to a signed int to insure that the 
 348 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 349 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 350 */
 351asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 352{
 353        return sys_readlink(path, buf, (int)bufsiz);
 354}
 355
 356/* Note: it is necessary to treat option as an unsigned int,
 357 * with the corresponding cast to a signed int to insure that the 
 358 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 359 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 360 */
 361asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 362{
 363        return sys_sched_get_priority_max((int)policy);
 364}
 365
 366
 367/* Note: it is necessary to treat policy 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 */
 372asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 373{
 374        return sys_sched_get_priority_min((int)policy);
 375}
 376
 377
 378/* Note: it is necessary to treat pid 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 */
 383asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 384{
 385        return sys_sched_getparam((int)pid, param);
 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 */
 394asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 395{
 396        return sys_sched_getscheduler((int)pid);
 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 */
 405asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 406{
 407        return sys_sched_setparam((int)pid, param);
 408}
 409
 410
 411/* Note: it is necessary to treat pid and policy as unsigned ints,
 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 */
 416asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 417{
 418        return sys_sched_setscheduler((int)pid, (int)policy, param);
 419}
 420
 421
 422/* Note: it is necessary to treat len as an unsigned int,
 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 */
 427asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 428{
 429        return sys_setdomainname(name, (int)len);
 430}
 431
 432
 433/* Note: it is necessary to treat gidsetsize 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 */
 438asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 439{
 440        return sys_setgroups((int)gidsetsize, grouplist);
 441}
 442
 443
 444asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 445{
 446        /* sign extend len */
 447        return sys_sethostname(name, (int)len);
 448}
 449
 450
 451/* Note: it is necessary to treat pid and pgid as unsigned ints,
 452 * with the corresponding cast to a signed int to insure that the 
 453 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 454 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 455 */
 456asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 457{
 458        return sys_setpgid((int)pid, (int)pgid);
 459}
 460
 461long compat_sys_getpriority(u32 which, u32 who)
 462{
 463        /* sign extend which and who */
 464        return sys_getpriority((int)which, (int)who);
 465}
 466
 467long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 468{
 469        /* sign extend which, who and niceval */
 470        return sys_setpriority((int)which, (int)who, (int)niceval);
 471}
 472
 473long compat_sys_ioprio_get(u32 which, u32 who)
 474{
 475        /* sign extend which and who */
 476        return sys_ioprio_get((int)which, (int)who);
 477}
 478
 479long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 480{
 481        /* sign extend which, who and ioprio */
 482        return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 483}
 484
 485/* Note: it is necessary to treat newmask as an unsigned int,
 486 * with the corresponding cast to a signed int to insure that the 
 487 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 488 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 489 */
 490asmlinkage long compat_sys_ssetmask(u32 newmask)
 491{
 492        return sys_ssetmask((int) newmask);
 493}
 494
 495asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 496{
 497        /* sign extend len */
 498        return sys_syslog(type, buf, (int)len);
 499}
 500
 501
 502/* Note: it is necessary to treat mask as an unsigned int,
 503 * with the corresponding cast to a signed int to insure that the 
 504 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 505 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 506 */
 507asmlinkage long compat_sys_umask(u32 mask)
 508{
 509        return sys_umask((int)mask);
 510}
 511
 512#ifdef CONFIG_SYSCTL_SYSCALL
 513struct __sysctl_args32 {
 514        u32 name;
 515        int nlen;
 516        u32 oldval;
 517        u32 oldlenp;
 518        u32 newval;
 519        u32 newlen;
 520        u32 __unused[4];
 521};
 522
 523asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 524{
 525        struct __sysctl_args32 tmp;
 526        int error;
 527        size_t oldlen;
 528        size_t __user *oldlenp = NULL;
 529        unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 530
 531        if (copy_from_user(&tmp, args, sizeof(tmp)))
 532                return -EFAULT;
 533
 534        if (tmp.oldval && tmp.oldlenp) {
 535                /* Duh, this is ugly and might not work if sysctl_args
 536                   is in read-only memory, but do_sysctl does indirectly
 537                   a lot of uaccess in both directions and we'd have to
 538                   basically copy the whole sysctl.c here, and
 539                   glibc's __sysctl uses rw memory for the structure
 540                   anyway.  */
 541                oldlenp = (size_t __user *)addr;
 542                if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 543                    put_user(oldlen, oldlenp))
 544                        return -EFAULT;
 545        }
 546
 547        lock_kernel();
 548        error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 549                          compat_ptr(tmp.oldval), oldlenp,
 550                          compat_ptr(tmp.newval), tmp.newlen);
 551        unlock_kernel();
 552        if (oldlenp) {
 553                if (!error) {
 554                        if (get_user(oldlen, oldlenp) ||
 555                            put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 556                                error = -EFAULT;
 557                }
 558                copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 559        }
 560        return error;
 561}
 562#endif
 563
 564unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 565                          unsigned long prot, unsigned long flags,
 566                          unsigned long fd, unsigned long pgoff)
 567{
 568        /* This should remain 12 even if PAGE_SIZE changes */
 569        return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 570}
 571
 572long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 573{
 574        /* sign extend tgid, pid */
 575        return sys_tgkill((int)tgid, (int)pid, sig);
 576}
 577
 578/* 
 579 * long long munging:
 580 * The 32 bit ABI passes long longs in an odd even register pair.
 581 */
 582
 583compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 584                             u32 reg6, u32 poshi, u32 poslo)
 585{
 586        return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 587}
 588
 589compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 590                              u32 reg6, u32 poshi, u32 poslo)
 591{
 592        return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 593}
 594
 595compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 596{
 597        return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 598}
 599
 600asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 601                                unsigned long high, unsigned long low)
 602{
 603        return sys_truncate(path, (high << 32) | low);
 604}
 605
 606asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 607                                     u32 lenhi, u32 lenlo)
 608{
 609        return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 610                             ((loff_t)lenhi << 32) | lenlo);
 611}
 612
 613asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 614                                 unsigned long low)
 615{
 616        return sys_ftruncate(fd, (high << 32) | low);
 617}
 618
 619long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 620                          size_t len)
 621{
 622        return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 623                                  buf, len);
 624}
 625
 626long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 627                     size_t len, int advice)
 628{
 629        return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 630                             advice);
 631}
 632
 633asmlinkage long compat_sys_add_key(const char __user *_type,
 634                              const char __user *_description,
 635                              const void __user *_payload,
 636                              u32 plen,
 637                              u32 ringid)
 638{
 639        return sys_add_key(_type, _description, _payload, plen, ringid);
 640}
 641
 642asmlinkage long compat_sys_request_key(const char __user *_type,
 643                                  const char __user *_description,
 644                                  const char __user *_callout_info,
 645                                  u32 destringid)
 646{
 647        return sys_request_key(_type, _description, _callout_info, destringid);
 648}
 649
 650asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 651                                   unsigned offset_hi, unsigned offset_lo,
 652                                   unsigned nbytes_hi, unsigned nbytes_lo)
 653{
 654        loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 655        loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 656
 657        return sys_sync_file_range(fd, offset, nbytes, flags);
 658}
 659
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