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sys_ppc32.c

/*
 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 2001 IBM
 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h> 
#include <linux/mm.h> 
#include <linux/file.h> 
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/mman.h>
#include <linux/in.h>
#include <linux/syscalls.h>
#include <linux/unistd.h>
#include <linux/sysctl.h>
#include <linux/binfmts.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/ptrace.h>
#include <linux/elf.h>
#include <linux/ipc.h>

#include <asm/ptrace.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include <asm/time.h>
#include <asm/mmu_context.h>
#include <asm/ppc-pci.h>
#include <asm/syscalls.h>


asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
            compat_ulong_t __user *outp, compat_ulong_t __user *exp,
            compat_uptr_t tvp_x)
{
      /* sign extend n */
      return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
}

int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
{
      compat_ino_t ino;
      long err;

      if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
          !new_valid_dev(stat->rdev))
            return -EOVERFLOW;

      ino = stat->ino;
      if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
            return -EOVERFLOW;

      err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
      err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
      err |= __put_user(ino, &statbuf->st_ino);
      err |= __put_user(stat->mode, &statbuf->st_mode);
      err |= __put_user(stat->nlink, &statbuf->st_nlink);
      err |= __put_user(stat->uid, &statbuf->st_uid);
      err |= __put_user(stat->gid, &statbuf->st_gid);
      err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
      err |= __put_user(stat->size, &statbuf->st_size);
      err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
      err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
      err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
      err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
      err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
      err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
      err |= __put_user(stat->blksize, &statbuf->st_blksize);
      err |= __put_user(stat->blocks, &statbuf->st_blocks);
      err |= __put_user(0, &statbuf->__unused4[0]);
      err |= __put_user(0, &statbuf->__unused4[1]);

      return err;
}

/* Note: it is necessary to treat option as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
{
      return sys_sysfs((int)option, arg1, arg2);
}

asmlinkage long compat_sys_pause(void)
{
      current->state = TASK_INTERRUPTIBLE;
      schedule();
      
      return -ERESTARTNOHAND;
}

static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
{
      long usec;

      if (!access_ok(VERIFY_READ, i, sizeof(*i)))
            return -EFAULT;
      if (__get_user(o->tv_sec, &i->tv_sec))
            return -EFAULT;
      if (__get_user(usec, &i->tv_usec))
            return -EFAULT;
      o->tv_nsec = usec * 1000;
      return 0;
}

static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
{
      return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
            (__put_user(i->tv_sec, &o->tv_sec) |
             __put_user(i->tv_usec, &o->tv_usec)));
}




/* Translations due to time_t size differences.  Which affects all
   sorts of things, like timeval and itimerval.  */
extern struct timezone sys_tz;

asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
      if (tv) {
            struct timeval ktv;
            do_gettimeofday(&ktv);
            if (put_tv32(tv, &ktv))
                  return -EFAULT;
      }
      if (tz) {
            if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
                  return -EFAULT;
      }
      
      return 0;
}



asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
      struct timespec kts;
      struct timezone ktz;
      
      if (tv) {
            if (get_ts32(&kts, tv))
                  return -EFAULT;
      }
      if (tz) {
            if (copy_from_user(&ktz, tz, sizeof(ktz)))
                  return -EFAULT;
      }

      return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}

#ifdef CONFIG_SYSVIPC
long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
             u32 fifth)
{
      int version;

      version = call >> 16; /* hack for backward compatibility */
      call &= 0xffff;

      switch (call) {

      case SEMTIMEDOP:
            if (fifth)
                  /* sign extend semid */
                  return compat_sys_semtimedop((int)first,
                                         compat_ptr(ptr), second,
                                         compat_ptr(fifth));
            /* else fall through for normal semop() */
      case SEMOP:
            /* struct sembuf is the same on 32 and 64bit :)) */
            /* sign extend semid */
            return sys_semtimedop((int)first, compat_ptr(ptr), second,
                              NULL);
      case SEMGET:
            /* sign extend key, nsems */
            return sys_semget((int)first, (int)second, third);
      case SEMCTL:
            /* sign extend semid, semnum */
            return compat_sys_semctl((int)first, (int)second, third,
                               compat_ptr(ptr));

      case MSGSND:
            /* sign extend msqid */
            return compat_sys_msgsnd((int)first, (int)second, third,
                               compat_ptr(ptr));
      case MSGRCV:
            /* sign extend msqid, msgtyp */
            return compat_sys_msgrcv((int)first, second, (int)fifth,
                               third, version, compat_ptr(ptr));
      case MSGGET:
            /* sign extend key */
            return sys_msgget((int)first, second);
      case MSGCTL:
            /* sign extend msqid */
            return compat_sys_msgctl((int)first, second, compat_ptr(ptr));

      case SHMAT:
            /* sign extend shmid */
            return compat_sys_shmat((int)first, second, third, version,
                              compat_ptr(ptr));
      case SHMDT:
            return sys_shmdt(compat_ptr(ptr));
      case SHMGET:
            /* sign extend key_t */
            return sys_shmget((int)first, second, third);
      case SHMCTL:
            /* sign extend shmid */
            return compat_sys_shmctl((int)first, second, compat_ptr(ptr));

      default:
            return -ENOSYS;
      }

      return -ENOSYS;
}
#endif

/* Note: it is necessary to treat out_fd and in_fd as unsigned ints, 
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
{
      mm_segment_t old_fs = get_fs();
      int ret;
      off_t of;
      off_t __user *up;

      if (offset && get_user(of, offset))
            return -EFAULT;

      /* The __user pointer cast is valid because of the set_fs() */          
      set_fs(KERNEL_DS);
      up = offset ? (off_t __user *) &of : NULL;
      ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
      set_fs(old_fs);
      
      if (offset && put_user(of, offset))
            return -EFAULT;
            
      return ret;
}

asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
{
      mm_segment_t old_fs = get_fs();
      int ret;
      loff_t lof;
      loff_t __user *up;
      
      if (offset && get_user(lof, offset))
            return -EFAULT;
            
      /* The __user pointer cast is valid because of the set_fs() */          
      set_fs(KERNEL_DS);
      up = offset ? (loff_t __user *) &lof : NULL;
      ret = sys_sendfile64(out_fd, in_fd, up, count);
      set_fs(old_fs);
      
      if (offset && put_user(lof, offset))
            return -EFAULT;
            
      return ret;
}

long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
              unsigned long a3, unsigned long a4, unsigned long a5,
              struct pt_regs *regs)
{
      int error;
      char * filename;
      
      filename = getname((char __user *) a0);
      error = PTR_ERR(filename);
      if (IS_ERR(filename))
            goto out;
      flush_fp_to_thread(current);
      flush_altivec_to_thread(current);

      error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);

      putname(filename);

out:
      return error;
}

/* Note: it is necessary to treat option as an unsigned int, 
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
{
      return sys_prctl((int)option,
                   (unsigned long) arg2,
                   (unsigned long) arg3,
                   (unsigned long) arg4,
                   (unsigned long) arg5);
}

/* Note: it is necessary to treat pid as an unsigned int, 
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
{
      struct timespec t;
      int ret;
      mm_segment_t old_fs = get_fs ();

      /* The __user pointer cast is valid because of the set_fs() */
      set_fs (KERNEL_DS);
      ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
      set_fs (old_fs);
      if (put_compat_timespec(&t, interval))
            return -EFAULT;
      return ret;
}

/* Note: it is necessary to treat mode as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
{
      return sys_access(filename, (int)mode);
}


/* Note: it is necessary to treat mode as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
{
      return sys_creat(pathname, (int)mode);
}


/* Note: it is necessary to treat pid and options as unsigned ints,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
{
      return sys_waitpid((int)pid, stat_addr, (int)options);
}


/* Note: it is necessary to treat gidsetsize as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
{
      return sys_getgroups((int)gidsetsize, grouplist);
}


/* Note: it is necessary to treat pid as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_getpgid(u32 pid)
{
      return sys_getpgid((int)pid);
}



/* Note: it is necessary to treat pid as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_getsid(u32 pid)
{
      return sys_getsid((int)pid);
}


/* Note: it is necessary to treat pid and sig as unsigned ints,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_kill(u32 pid, u32 sig)
{
      return sys_kill((int)pid, (int)sig);
}


/* Note: it is necessary to treat mode as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
{
      return sys_mkdir(pathname, (int)mode);
}

long compat_sys_nice(u32 increment)
{
      /* sign extend increment */
      return sys_nice((int)increment);
}

off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
{
      /* sign extend n */
      return sys_lseek(fd, (int)offset, origin);
}

/* Note: it is necessary to treat bufsiz as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
{
      return sys_readlink(path, buf, (int)bufsiz);
}

/* Note: it is necessary to treat option as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
{
      return sys_sched_get_priority_max((int)policy);
}


/* Note: it is necessary to treat policy as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
{
      return sys_sched_get_priority_min((int)policy);
}


/* Note: it is necessary to treat pid as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
{
      return sys_sched_getparam((int)pid, param);
}


/* Note: it is necessary to treat pid as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_getscheduler(u32 pid)
{
      return sys_sched_getscheduler((int)pid);
}


/* Note: it is necessary to treat pid as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
{
      return sys_sched_setparam((int)pid, param);
}


/* Note: it is necessary to treat pid and policy as unsigned ints,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
{
      return sys_sched_setscheduler((int)pid, (int)policy, param);
}


/* Note: it is necessary to treat len as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
{
      return sys_setdomainname(name, (int)len);
}


/* Note: it is necessary to treat gidsetsize as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
{
      return sys_setgroups((int)gidsetsize, grouplist);
}


asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
{
      /* sign extend len */
      return sys_sethostname(name, (int)len);
}


/* Note: it is necessary to treat pid and pgid as unsigned ints,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
{
      return sys_setpgid((int)pid, (int)pgid);
}

long compat_sys_getpriority(u32 which, u32 who)
{
      /* sign extend which and who */
      return sys_getpriority((int)which, (int)who);
}

long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
{
      /* sign extend which, who and niceval */
      return sys_setpriority((int)which, (int)who, (int)niceval);
}

long compat_sys_ioprio_get(u32 which, u32 who)
{
      /* sign extend which and who */
      return sys_ioprio_get((int)which, (int)who);
}

long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
{
      /* sign extend which, who and ioprio */
      return sys_ioprio_set((int)which, (int)who, (int)ioprio);
}

/* Note: it is necessary to treat newmask as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_ssetmask(u32 newmask)
{
      return sys_ssetmask((int) newmask);
}

asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
{
      /* sign extend len */
      return sys_syslog(type, buf, (int)len);
}


/* Note: it is necessary to treat mask as an unsigned int,
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_umask(u32 mask)
{
      return sys_umask((int)mask);
}

#ifdef CONFIG_SYSCTL_SYSCALL
struct __sysctl_args32 {
      u32 name;
      int nlen;
      u32 oldval;
      u32 oldlenp;
      u32 newval;
      u32 newlen;
      u32 __unused[4];
};

asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
{
      struct __sysctl_args32 tmp;
      int error;
      size_t oldlen;
      size_t __user *oldlenp = NULL;
      unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;

      if (copy_from_user(&tmp, args, sizeof(tmp)))
            return -EFAULT;

      if (tmp.oldval && tmp.oldlenp) {
            /* Duh, this is ugly and might not work if sysctl_args
               is in read-only memory, but do_sysctl does indirectly
               a lot of uaccess in both directions and we'd have to
               basically copy the whole sysctl.c here, and
               glibc's __sysctl uses rw memory for the structure
               anyway.  */
            oldlenp = (size_t __user *)addr;
            if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
                put_user(oldlen, oldlenp))
                  return -EFAULT;
      }

      lock_kernel();
      error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
                    compat_ptr(tmp.oldval), oldlenp,
                    compat_ptr(tmp.newval), tmp.newlen);
      unlock_kernel();
      if (oldlenp) {
            if (!error) {
                  if (get_user(oldlen, oldlenp) ||
                      put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
                        error = -EFAULT;
            }
            copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
      }
      return error;
}
#endif

unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
                    unsigned long prot, unsigned long flags,
                    unsigned long fd, unsigned long pgoff)
{
      /* This should remain 12 even if PAGE_SIZE changes */
      return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
}

long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
{
      /* sign extend tgid, pid */
      return sys_tgkill((int)tgid, (int)pid, sig);
}

/* 
 * long long munging:
 * The 32 bit ABI passes long longs in an odd even register pair.
 */

compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
                       u32 reg6, u32 poshi, u32 poslo)
{
      return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
}

compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
                        u32 reg6, u32 poshi, u32 poslo)
{
      return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
}

compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
{
      return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
}

asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
                        unsigned long high, unsigned long low)
{
      return sys_truncate(path, (high << 32) | low);
}

asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
                             u32 lenhi, u32 lenlo)
{
      return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
                       ((loff_t)lenhi << 32) | lenlo);
}

asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
                         unsigned long low)
{
      return sys_ftruncate(fd, (high << 32) | low);
}

long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
                    size_t len)
{
      return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
                          buf, len);
}

long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
                 size_t len, int advice)
{
      return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
                       advice);
}

asmlinkage long compat_sys_add_key(const char __user *_type,
                        const char __user *_description,
                        const void __user *_payload,
                        u32 plen,
                        u32 ringid)
{
      return sys_add_key(_type, _description, _payload, plen, ringid);
}

asmlinkage long compat_sys_request_key(const char __user *_type,
                          const char __user *_description,
                          const char __user *_callout_info,
                          u32 destringid)
{
      return sys_request_key(_type, _description, _callout_info, destringid);
}

asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
                           unsigned offset_hi, unsigned offset_lo,
                           unsigned nbytes_hi, unsigned nbytes_lo)
{
      loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
      loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;

      return sys_sync_file_range(fd, offset, nbytes, flags);
}

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