arch/ppc64/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/config.h>
  18 #include <linux/kernel.h>
  19 #include <linux/sched.h>
  20 #include <linux/fs.h>
  21 #include <linux/mm.h>
  22 #include <linux/file.h>
  23 #include <linux/signal.h>
  24 #include <linux/resource.h>
  25 #include <linux/times.h>
  26 #include <linux/utsname.h>
  27 #include <linux/timex.h>
  28 #include <linux/smp.h>
  29 #include <linux/smp_lock.h>
  30 #include <linux/sem.h>
  31 #include <linux/msg.h>
  32 #include <linux/shm.h>
  33 #include <linux/slab.h>
  34 #include <linux/uio.h>
  35 #include <linux/aio.h>
  36 #include <linux/nfs_fs.h>
  37 #include <linux/module.h>
  38 #include <linux/sunrpc/svc.h>
  39 #include <linux/nfsd/nfsd.h>
  40 #include <linux/nfsd/cache.h>
  41 #include <linux/nfsd/xdr.h>
  42 #include <linux/nfsd/syscall.h>
  43 #include <linux/poll.h>
  44 #include <linux/personality.h>
  45 #include <linux/stat.h>
  46 #include <linux/filter.h>
  47 #include <linux/highmem.h>
  48 #include <linux/highuid.h>
  49 #include <linux/mman.h>
  50 #include <linux/ipv6.h>
  51 #include <linux/in.h>
  52 #include <linux/icmpv6.h>
  53 #include <linux/syscalls.h>
  54 #include <linux/unistd.h>
  55 #include <linux/sysctl.h>
  56 #include <linux/binfmts.h>
  57 #include <linux/dnotify.h>
  58 #include <linux/security.h>
  59 #include <linux/compat.h>
  60 #include <linux/ptrace.h>
  61 #include <linux/aio_abi.h>
  62 #include <linux/elf.h>
  63
  64 #include <net/scm.h>
  65 #include <net/sock.h>
  66
  67 #include <asm/ptrace.h>
  68 #include <asm/types.h>
  69 #include <asm/ipc.h>
  70 #include <asm/uaccess.h>
  71 #include <asm/unistd.h>
  72 #include <asm/semaphore.h>
  73 #include <asm/ppcdebug.h>
  74 #include <asm/time.h>
  75 #include <asm/mmu_context.h>
  76 #include <asm/systemcfg.h>
  77
  78 #include "pci.h"
  79
  80 /* readdir & getdents */
  81 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  82 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  83
  84 struct old_linux_dirent32 {
  85         u32             d_ino;
  86         u32             d_offset;
  87         unsigned short  d_namlen;
  88         char            d_name[1];
  89 };
  90
  91 struct readdir_callback32 {
  92         struct old_linux_dirent32 __user * dirent;
  93         int count;
  94 };
  95
  96 static int fillonedir(void * __buf, const char * name, int namlen,
  97                                   off_t offset, ino_t ino, unsigned int d_type)
  98 {
  99         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
 100         struct old_linux_dirent32 __user * dirent;
 101
 102         if (buf->count)
 103                 return -EINVAL;
 104         buf->count++;
 105         dirent = buf->dirent;
 106         put_user(ino, &dirent->d_ino);
 107         put_user(offset, &dirent->d_offset);
 108         put_user(namlen, &dirent->d_namlen);
 109         copy_to_user(dirent->d_name, name, namlen);
 110         put_user(0, dirent->d_name + namlen);
 111         return 0;
 112 }
 113
 114 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
 115 {
 116         int error = -EBADF;
 117         struct file * file;
 118         struct readdir_callback32 buf;
 119
 120         file = fget(fd);
 121         if (!file)
 122                 goto out;
 123
 124         buf.count = 0;
 125         buf.dirent = dirent;
 126
 127         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 128         if (error < 0)
 129                 goto out_putf;
 130         error = buf.count;
 131
 132 out_putf:
 133         fput(file);
 134 out:
 135         return error;
 136 }
 137
 138 struct linux_dirent32 {
 139         u32             d_ino;
 140         u32             d_off;
 141         unsigned short  d_reclen;
 142         char            d_name[1];
 143 };
 144
 145 struct getdents_callback32 {
 146         struct linux_dirent32 __user * current_dir;
 147         struct linux_dirent32 __user * previous;
 148         int count;
 149         int error;
 150 };
 151
 152 static int filldir(void * __buf, const char * name, int namlen, off_t offset,
 153                    ino_t ino, unsigned int d_type)
 154 {
 155         struct linux_dirent32 __user * dirent;
 156         struct getdents_callback32 * buf = (struct getdents_callback32 *) __buf;
 157         int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
 158
 159         buf->error = -EINVAL;   /* only used if we fail.. */
 160         if (reclen > buf->count)
 161                 return -EINVAL;
 162         dirent = buf->previous;
 163         if (dirent) {
 164                 if (__put_user(offset, &dirent->d_off))
 165                         goto efault;
 166         }
 167         dirent = buf->current_dir;
 168         if (__put_user(ino, &dirent->d_ino))
 169                 goto efault;
 170         if (__put_user(reclen, &dirent->d_reclen))
 171                 goto efault;
 172         if (copy_to_user(dirent->d_name, name, namlen))
 173                 goto efault;
 174         if (__put_user(0, dirent->d_name + namlen))
 175                 goto efault;
 176         if (__put_user(d_type, (char __user *) dirent + reclen - 1))
 177                 goto efault;
 178         buf->previous = dirent;
 179         dirent = (void __user *)dirent + reclen;
 180         buf->current_dir = dirent;
 181         buf->count -= reclen;
 182         return 0;
 183 efault:
 184         buf->error = -EFAULT;
 185         return -EFAULT;
 186 }
 187
 188 asmlinkage long sys32_getdents(unsigned int fd, struct linux_dirent32 __user *dirent,
 189                     unsigned int count)
 190 {
 191         struct file * file;
 192         struct linux_dirent32 __user * lastdirent;
 193         struct getdents_callback32 buf;
 194         int error;
 195
 196         error = -EFAULT;
 197         if (!access_ok(VERIFY_WRITE, dirent, count))
 198                 goto out;
 199
 200         error = -EBADF;
 201         file = fget(fd);
 202         if (!file)
 203                 goto out;
 204
 205         buf.current_dir = dirent;
 206         buf.previous = NULL;
 207         buf.count = count;
 208         buf.error = 0;
 209
 210         error = vfs_readdir(file, (filldir_t)filldir, &buf);
 211         if (error < 0)
 212                 goto out_putf;
 213         error = buf.error;
 214         lastdirent = buf.previous;
 215         if (lastdirent) {
 216                 if (put_user(file->f_pos, &lastdirent->d_off))
 217                         error = -EFAULT;
 218                 else
 219                         error = count - buf.count;
 220         }
 221
 222 out_putf:
 223         fput(file);
 224 out:
 225         return error;
 226 }
 227
 228 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 229                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 230                 compat_uptr_t tvp_x)
 231 {
 232         /* sign extend n */
 233         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 234 }
 235
 236 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 237 {
 238         long err;
 239
 240         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 241             !new_valid_dev(stat->rdev))
 242                 return -EOVERFLOW;
 243
 244         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 245         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 246         err |= __put_user(stat->ino, &statbuf->st_ino);
 247         err |= __put_user(stat->mode, &statbuf->st_mode);
 248         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 249         err |= __put_user(stat->uid, &statbuf->st_uid);
 250         err |= __put_user(stat->gid, &statbuf->st_gid);
 251         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 252         err |= __put_user(stat->size, &statbuf->st_size);
 253         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 254         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 255         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 256         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 257         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 258         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 259         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 260         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 261         err |= __put_user(0, &statbuf->__unused4[0]);
 262         err |= __put_user(0, &statbuf->__unused4[1]);
 263
 264         return err;
 265 }
 266
 267 /* Note: it is necessary to treat option as an unsigned int,
 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 sys32_sysfs(u32 option, u32 arg1, u32 arg2)
 273 {
 274         return sys_sysfs((int)option, arg1, arg2);
 275 }
 276
 277 /* Handle adjtimex compatibility. */
 278 struct timex32 {
 279         u32 modes;
 280         s32 offset, freq, maxerror, esterror;
 281         s32 status, constant, precision, tolerance;
 282         struct compat_timeval time;
 283         s32 tick;
 284         s32 ppsfreq, jitter, shift, stabil;
 285         s32 jitcnt, calcnt, errcnt, stbcnt;
 286         s32  :32; s32  :32; s32  :32; s32  :32;
 287         s32  :32; s32  :32; s32  :32; s32  :32;
 288         s32  :32; s32  :32; s32  :32; s32  :32;
 289 };
 290
 291 extern int do_adjtimex(struct timex *);
 292 extern void ppc_adjtimex(void);
 293
 294 asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 295 {
 296         struct timex txc;
 297         int ret;
 298
 299         memset(&txc, 0, sizeof(struct timex));
 300
 301         if(get_user(txc.modes, &utp->modes) ||
 302            __get_user(txc.offset, &utp->offset) ||
 303            __get_user(txc.freq, &utp->freq) ||
 304            __get_user(txc.maxerror, &utp->maxerror) ||
 305            __get_user(txc.esterror, &utp->esterror) ||
 306            __get_user(txc.status, &utp->status) ||
 307            __get_user(txc.constant, &utp->constant) ||
 308            __get_user(txc.precision, &utp->precision) ||
 309            __get_user(txc.tolerance, &utp->tolerance) ||
 310            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 311            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 312            __get_user(txc.tick, &utp->tick) ||
 313            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 314            __get_user(txc.jitter, &utp->jitter) ||
 315            __get_user(txc.shift, &utp->shift) ||
 316            __get_user(txc.stabil, &utp->stabil) ||
 317            __get_user(txc.jitcnt, &utp->jitcnt) ||
 318            __get_user(txc.calcnt, &utp->calcnt) ||
 319            __get_user(txc.errcnt, &utp->errcnt) ||
 320            __get_user(txc.stbcnt, &utp->stbcnt))
 321                 return -EFAULT;
 322
 323         ret = do_adjtimex(&txc);
 324
 325         /* adjust the conversion of TB to time of day to track adjtimex */
 326         ppc_adjtimex();
 327
 328         if(put_user(txc.modes, &utp->modes) ||
 329            __put_user(txc.offset, &utp->offset) ||
 330            __put_user(txc.freq, &utp->freq) ||
 331            __put_user(txc.maxerror, &utp->maxerror) ||
 332            __put_user(txc.esterror, &utp->esterror) ||
 333            __put_user(txc.status, &utp->status) ||
 334            __put_user(txc.constant, &utp->constant) ||
 335            __put_user(txc.precision, &utp->precision) ||
 336            __put_user(txc.tolerance, &utp->tolerance) ||
 337            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 338            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 339            __put_user(txc.tick, &utp->tick) ||
 340            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 341            __put_user(txc.jitter, &utp->jitter) ||
 342            __put_user(txc.shift, &utp->shift) ||
 343            __put_user(txc.stabil, &utp->stabil) ||
 344            __put_user(txc.jitcnt, &utp->jitcnt) ||
 345            __put_user(txc.calcnt, &utp->calcnt) ||
 346            __put_user(txc.errcnt, &utp->errcnt) ||
 347            __put_user(txc.stbcnt, &utp->stbcnt))
 348                 ret = -EFAULT;
 349
 350         return ret;
 351 }
 352
 353
 354 /* These are here just in case some old sparc32 binary calls it. */
 355 asmlinkage long sys32_pause(void)
 356 {
 357         current->state = TASK_INTERRUPTIBLE;
 358         schedule();
 359
 360         return -ERESTARTNOHAND;
 361 }
 362
 363
 364
 365 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 366 {
 367         long usec;
 368
 369         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 370                 return -EFAULT;
 371         if (__get_user(o->tv_sec, &i->tv_sec))
 372                 return -EFAULT;
 373         if (__get_user(usec, &i->tv_usec))
 374                 return -EFAULT;
 375         o->tv_nsec = usec * 1000;
 376         return 0;
 377 }
 378
 379 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 380 {
 381         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 382                 (__put_user(i->tv_sec, &o->tv_sec) |
 383                  __put_user(i->tv_usec, &o->tv_usec)));
 384 }
 385
 386 struct sysinfo32 {
 387         s32 uptime;
 388         u32 loads[3];
 389         u32 totalram;
 390         u32 freeram;
 391         u32 sharedram;
 392         u32 bufferram;
 393         u32 totalswap;
 394         u32 freeswap;
 395         unsigned short procs;
 396         unsigned short pad;
 397         u32 totalhigh;
 398         u32 freehigh;
 399         u32 mem_unit;
 400         char _f[20-2*sizeof(int)-sizeof(int)];
 401 };
 402
 403 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 404 {
 405         struct sysinfo s;
 406         int ret, err;
 407         int bitcount=0;
 408         mm_segment_t old_fs = get_fs ();
 409
 410         /* The __user cast is valid due to set_fs() */
 411         set_fs (KERNEL_DS);
 412         ret = sys_sysinfo((struct sysinfo __user *)&s);
 413         set_fs (old_fs);
 414
 415         /* Check to see if any memory value is too large for 32-bit and
 416          * scale down if needed.
 417          */
 418         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 419             while (s.mem_unit < PAGE_SIZE) {
 420                 s.mem_unit <<= 1;
 421                 bitcount++;
 422             }
 423             s.totalram >>=bitcount;
 424             s.freeram >>= bitcount;
 425             s.sharedram >>= bitcount;
 426             s.bufferram >>= bitcount;
 427             s.totalswap >>= bitcount;
 428             s.freeswap >>= bitcount;
 429             s.totalhigh >>= bitcount;
 430             s.freehigh >>= bitcount;
 431         }
 432
 433         err = put_user (s.uptime, &info->uptime);
 434         err |= __put_user (s.loads[0], &info->loads[0]);
 435         err |= __put_user (s.loads[1], &info->loads[1]);
 436         err |= __put_user (s.loads[2], &info->loads[2]);
 437         err |= __put_user (s.totalram, &info->totalram);
 438         err |= __put_user (s.freeram, &info->freeram);
 439         err |= __put_user (s.sharedram, &info->sharedram);
 440         err |= __put_user (s.bufferram, &info->bufferram);
 441         err |= __put_user (s.totalswap, &info->totalswap);
 442         err |= __put_user (s.freeswap, &info->freeswap);
 443         err |= __put_user (s.procs, &info->procs);
 444         err |= __put_user (s.totalhigh, &info->totalhigh);
 445         err |= __put_user (s.freehigh, &info->freehigh);
 446         err |= __put_user (s.mem_unit, &info->mem_unit);
 447         if (err)
 448                 return -EFAULT;
 449
 450         return ret;
 451 }
 452
 453
 454
 455
 456 /* Translations due to time_t size differences.  Which affects all
 457    sorts of things, like timeval and itimerval.  */
 458 extern struct timezone sys_tz;
 459
 460 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 461 {
 462         if (tv) {
 463                 struct timeval ktv;
 464                 do_gettimeofday(&ktv);
 465                 if (put_tv32(tv, &ktv))
 466                         return -EFAULT;
 467         }
 468         if (tz) {
 469                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 470                         return -EFAULT;
 471         }
 472
 473         return 0;
 474 }
 475
 476
 477
 478 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 479 {
 480         struct timespec kts;
 481         struct timezone ktz;
 482
 483         if (tv) {
 484                 if (get_ts32(&kts, tv))
 485                         return -EFAULT;
 486         }
 487         if (tz) {
 488                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 489                         return -EFAULT;
 490         }
 491
 492         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 493 }
 494
 495 #ifdef CONFIG_SYSVIPC
 496 long sys32_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 497                u32 fifth)
 498 {
 499         int version;
 500
 501         version = call >> 16; /* hack for backward compatibility */
 502         call &= 0xffff;
 503
 504         switch (call) {
 505
 506         case SEMTIMEDOP:
 507                 if (fifth)
 508                         /* sign extend semid */
 509                         return compat_sys_semtimedop((int)first,
 510                                                      compat_ptr(ptr), second,
 511                                                      compat_ptr(fifth));
 512                 /* else fall through for normal semop() */
 513         case SEMOP:
 514                 /* struct sembuf is the same on 32 and 64bit :)) */
 515                 /* sign extend semid */
 516                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 517                                       NULL);
 518         case SEMGET:
 519                 /* sign extend key, nsems */
 520                 return sys_semget((int)first, (int)second, third);
 521         case SEMCTL:
 522                 /* sign extend semid, semnum */
 523                 return compat_sys_semctl((int)first, (int)second, third,
 524                                          compat_ptr(ptr));
 525
 526         case MSGSND:
 527                 /* sign extend msqid */
 528                 return compat_sys_msgsnd((int)first, (int)second, third,
 529                                          compat_ptr(ptr));
 530         case MSGRCV:
 531                 /* sign extend msqid, msgtyp */
 532                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 533                                          third, version, compat_ptr(ptr));
 534         case MSGGET:
 535                 /* sign extend key */
 536                 return sys_msgget((int)first, second);
 537         case MSGCTL:
 538                 /* sign extend msqid */
 539                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 540
 541         case SHMAT:
 542                 /* sign extend shmid */
 543                 return compat_sys_shmat((int)first, second, third, version,
 544                                         compat_ptr(ptr));
 545         case SHMDT:
 546                 return sys_shmdt(compat_ptr(ptr));
 547         case SHMGET:
 548                 /* sign extend key_t */
 549                 return sys_shmget((int)first, second, third);
 550         case SHMCTL:
 551                 /* sign extend shmid */
 552                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 553
 554         default:
 555                 return -ENOSYS;
 556         }
 557
 558         return -ENOSYS;
 559 }
 560 #endif
 561
 562 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 563  * with the corresponding cast to a signed int to insure that the
 564  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 565  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 566  */
 567 asmlinkage long sys32_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 568 {
 569         mm_segment_t old_fs = get_fs();
 570         int ret;
 571         off_t of;
 572         off_t __user *up;
 573
 574         if (offset && get_user(of, offset))
 575                 return -EFAULT;
 576
 577         /* The __user pointer cast is valid because of the set_fs() */
 578         set_fs(KERNEL_DS);
 579         up = offset ? (off_t __user *) &of : NULL;
 580         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 581         set_fs(old_fs);
 582
 583         if (offset && put_user(of, offset))
 584                 return -EFAULT;
 585
 586         return ret;
 587 }
 588
 589 asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 590 {
 591         mm_segment_t old_fs = get_fs();
 592         int ret;
 593         loff_t lof;
 594         loff_t __user *up;
 595
 596         if (offset && get_user(lof, offset))
 597                 return -EFAULT;
 598
 599         /* The __user pointer cast is valid because of the set_fs() */
 600         set_fs(KERNEL_DS);
 601         up = offset ? (loff_t __user *) &lof : NULL;
 602         ret = sys_sendfile64(out_fd, in_fd, up, count);
 603         set_fs(old_fs);
 604
 605         if (offset && put_user(lof, offset))
 606                 return -EFAULT;
 607
 608         return ret;
 609 }
 610
 611 long sys32_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 612                   unsigned long a3, unsigned long a4, unsigned long a5,
 613                   struct pt_regs *regs)
 614 {
 615         int error;
 616         char * filename;
 617
 618         filename = getname((char __user *) a0);
 619         error = PTR_ERR(filename);
 620         if (IS_ERR(filename))
 621                 goto out;
 622         flush_fp_to_thread(current);
 623         flush_altivec_to_thread(current);
 624
 625         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 626
 627         if (error == 0) {
 628                 task_lock(current);
 629                 current->ptrace &= ~PT_DTRACE;
 630                 task_unlock(current);
 631         }
 632         putname(filename);
 633
 634 out:
 635         return error;
 636 }
 637
 638 /* Set up a thread for executing a new program. */
 639 void start_thread32(struct pt_regs* regs, unsigned long nip, unsigned long sp)
 640 {
 641         set_fs(USER_DS);
 642
 643         /*
 644          * If we exec out of a kernel thread then thread.regs will not be
 645          * set. Do it now.
 646          */
 647         if (!current->thread.regs) {
 648                 unsigned long childregs = (unsigned long)current->thread_info +
 649                                                 THREAD_SIZE;
 650                 childregs -= sizeof(struct pt_regs);
 651                 current->thread.regs = (struct pt_regs *)childregs;
 652         }
 653
 654         /*
 655          * ELF_PLAT_INIT already clears all registers but it also sets r2.
 656          * So just clear r2 here.
 657          */
 658         regs->gpr[2] = 0;
 659
 660         regs->nip = nip;
 661         regs->gpr[1] = sp;
 662         regs->msr = MSR_USER32;
 663 #ifndef CONFIG_SMP
 664         if (last_task_used_math == current)
 665                 last_task_used_math = 0;
 666 #endif /* CONFIG_SMP */
 667         current->thread.fpscr = 0;
 668         memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
 669 #ifdef CONFIG_ALTIVEC
 670 #ifndef CONFIG_SMP
 671         if (last_task_used_altivec == current)
 672                 last_task_used_altivec = 0;
 673 #endif /* CONFIG_SMP */
 674         memset(current->thread.vr, 0, sizeof(current->thread.vr));
 675         current->thread.vscr.u[0] = 0;
 676         current->thread.vscr.u[1] = 0;
 677         current->thread.vscr.u[2] = 0;
 678         current->thread.vscr.u[3] = 0x00010000; /* Java mode disabled */
 679         current->thread.vrsave = 0;
 680         current->thread.used_vr = 0;
 681 #endif /* CONFIG_ALTIVEC */
 682 }
 683
 684 /* Note: it is necessary to treat option as an unsigned int,
 685  * with the corresponding cast to a signed int to insure that the
 686  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 687  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 688  */
 689 asmlinkage long sys32_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 690 {
 691         return sys_prctl((int)option,
 692                          (unsigned long) arg2,
 693                          (unsigned long) arg3,
 694                          (unsigned long) arg4,
 695                          (unsigned long) arg5);
 696 }
 697
 698 /* Note: it is necessary to treat pid as an unsigned int,
 699  * with the corresponding cast to a signed int to insure that the
 700  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 701  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 702  */
 703 asmlinkage long sys32_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 704 {
 705         struct timespec t;
 706         int ret;
 707         mm_segment_t old_fs = get_fs ();
 708
 709         /* The __user pointer cast is valid because of the set_fs() */
 710         set_fs (KERNEL_DS);
 711         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 712         set_fs (old_fs);
 713         if (put_compat_timespec(&t, interval))
 714                 return -EFAULT;
 715         return ret;
 716 }
 717
 718 asmlinkage int sys32_pciconfig_read(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf)
 719 {
 720         return sys_pciconfig_read((unsigned long) bus,
 721                                   (unsigned long) dfn,
 722                                   (unsigned long) off,
 723                                   (unsigned long) len,
 724                                   compat_ptr(ubuf));
 725 }
 726
 727 asmlinkage int sys32_pciconfig_write(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf)
 728 {
 729         return sys_pciconfig_write((unsigned long) bus,
 730                                    (unsigned long) dfn,
 731                                    (unsigned long) off,
 732                                    (unsigned long) len,
 733                                    compat_ptr(ubuf));
 734 }
 735
 736 #define IOBASE_BRIDGE_NUMBER    0
 737 #define IOBASE_MEMORY           1
 738 #define IOBASE_IO               2
 739 #define IOBASE_ISA_IO           3
 740 #define IOBASE_ISA_MEM          4
 741
 742 asmlinkage int sys32_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn)
 743 {
 744         struct pci_controller* hose;
 745         struct list_head *ln;
 746         struct pci_bus *bus = NULL;
 747         struct device_node *hose_node;
 748
 749         /* Argh ! Please forgive me for that hack, but that's the
 750          * simplest way to get existing XFree to not lockup on some
 751          * G5 machines... So when something asks for bus 0 io base
 752          * (bus 0 is HT root), we return the AGP one instead.
 753          */
 754 #ifdef CONFIG_PPC_PMAC
 755         if (systemcfg->platform == PLATFORM_POWERMAC &&
 756             machine_is_compatible("MacRISC4"))
 757                 if (in_bus == 0)
 758                         in_bus = 0xf0;
 759 #endif /* CONFIG_PPC_PMAC */
 760
 761         /* That syscall isn't quite compatible with PCI domains, but it's
 762          * used on pre-domains setup. We return the first match
 763          */
 764
 765         for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
 766                 bus = pci_bus_b(ln);
 767                 if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
 768                         break;
 769                 bus = NULL;
 770         }
 771         if (bus == NULL || bus->sysdata == NULL)
 772                 return -ENODEV;
 773
 774         hose_node = (struct device_node *)bus->sysdata;
 775         hose = hose_node->phb;
 776
 777         switch (which) {
 778         case IOBASE_BRIDGE_NUMBER:
 779                 return (long)hose->first_busno;
 780         case IOBASE_MEMORY:
 781                 return (long)hose->pci_mem_offset;
 782         case IOBASE_IO:
 783                 return (long)hose->io_base_phys;
 784         case IOBASE_ISA_IO:
 785                 return (long)isa_io_base;
 786         case IOBASE_ISA_MEM:
 787                 return -EINVAL;
 788         }
 789
 790         return -EOPNOTSUPP;
 791 }
 792
 793
 794 asmlinkage int ppc64_newuname(struct new_utsname __user * name)
 795 {
 796         int errno = sys_newuname(name);
 797
 798         if (current->personality == PER_LINUX32 && !errno) {
 799                 if(copy_to_user(name->machine, "ppc\0\0", 8)) {
 800                         errno = -EFAULT;
 801                 }
 802         }
 803         return errno;
 804 }
 805
 806 asmlinkage int ppc64_personality(unsigned long personality)
 807 {
 808         int ret;
 809         if (current->personality == PER_LINUX32 && personality == PER_LINUX)
 810                 personality = PER_LINUX32;
 811         ret = sys_personality(personality);
 812         if (ret == PER_LINUX32)
 813                 ret = PER_LINUX;
 814         return ret;
 815 }
 816
 817
 818
 819 /* Note: it is necessary to treat mode as an unsigned int,
 820  * with the corresponding cast to a signed int to insure that the
 821  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 822  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 823  */
 824 asmlinkage long sys32_access(const char __user * filename, u32 mode)
 825 {
 826         return sys_access(filename, (int)mode);
 827 }
 828
 829
 830 /* Note: it is necessary to treat mode as an unsigned int,
 831  * with the corresponding cast to a signed int to insure that the
 832  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 833  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 834  */
 835 asmlinkage long sys32_creat(const char __user * pathname, u32 mode)
 836 {
 837         return sys_creat(pathname, (int)mode);
 838 }
 839
 840
 841 /* Note: it is necessary to treat pid and options as unsigned ints,
 842  * with the corresponding cast to a signed int to insure that the
 843  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 844  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 845  */
 846 asmlinkage long sys32_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 847 {
 848         return sys_waitpid((int)pid, stat_addr, (int)options);
 849 }
 850
 851
 852 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 853  * with the corresponding cast to a signed int to insure that the
 854  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 855  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 856  */
 857 asmlinkage long sys32_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 858 {
 859         return sys_getgroups((int)gidsetsize, grouplist);
 860 }
 861
 862
 863 /* Note: it is necessary to treat pid as an unsigned int,
 864  * with the corresponding cast to a signed int to insure that the
 865  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 866  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 867  */
 868 asmlinkage long sys32_getpgid(u32 pid)
 869 {
 870         return sys_getpgid((int)pid);
 871 }
 872
 873
 874 /* Note: it is necessary to treat which and who as unsigned ints,
 875  * with the corresponding cast to a signed int to insure that the
 876  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 877  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 878  */
 879 asmlinkage long sys32_getpriority(u32 which, u32 who)
 880 {
 881         return sys_getpriority((int)which, (int)who);
 882 }
 883
 884
 885 /* Note: it is necessary to treat pid as an unsigned int,
 886  * with the corresponding cast to a signed int to insure that the
 887  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 888  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 889  */
 890 asmlinkage long sys32_getsid(u32 pid)
 891 {
 892         return sys_getsid((int)pid);
 893 }
 894
 895
 896 /* Note: it is necessary to treat pid and sig as unsigned ints,
 897  * with the corresponding cast to a signed int to insure that the
 898  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 899  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 900  */
 901 asmlinkage long sys32_kill(u32 pid, u32 sig)
 902 {
 903         return sys_kill((int)pid, (int)sig);
 904 }
 905
 906
 907 /* Note: it is necessary to treat mode as an unsigned int,
 908  * with the corresponding cast to a signed int to insure that the
 909  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 910  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 911  */
 912 asmlinkage long sys32_mkdir(const char __user * pathname, u32 mode)
 913 {
 914         return sys_mkdir(pathname, (int)mode);
 915 }
 916
 917 long sys32_nice(u32 increment)
 918 {
 919         /* sign extend increment */
 920         return sys_nice((int)increment);
 921 }
 922
 923 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 924 {
 925         /* sign extend n */
 926         return sys_lseek(fd, (int)offset, origin);
 927 }
 928
 929 /*
 930  * This is just a version for 32-bit applications which does
 931  * not force O_LARGEFILE on.
 932  */
 933 asmlinkage long sys32_open(const char __user * filename, int flags, int mode)
 934 {
 935         char * tmp;
 936         int fd, error;
 937
 938         tmp = getname(filename);
 939         fd = PTR_ERR(tmp);
 940         if (!IS_ERR(tmp)) {
 941                 fd = get_unused_fd();
 942                 if (fd >= 0) {
 943                         struct file * f = filp_open(tmp, flags, mode);
 944                         error = PTR_ERR(f);
 945                         if (IS_ERR(f))
 946                                 goto out_error;
 947                         fd_install(fd, f);
 948                 }
 949 out:
 950                 putname(tmp);
 951         }
 952         return fd;
 953
 954 out_error:
 955         put_unused_fd(fd);
 956         fd = error;
 957         goto out;
 958 }
 959
 960 /* Note: it is necessary to treat bufsiz as an unsigned int,
 961  * with the corresponding cast to a signed int to insure that the
 962  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 963  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 964  */
 965 asmlinkage long sys32_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 966 {
 967         return sys_readlink(path, buf, (int)bufsiz);
 968 }
 969
 970 /* Note: it is necessary to treat option as an unsigned int,
 971  * with the corresponding cast to a signed int to insure that the
 972  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 973  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 974  */
 975 asmlinkage long sys32_sched_get_priority_max(u32 policy)
 976 {
 977         return sys_sched_get_priority_max((int)policy);
 978 }
 979
 980
 981 /* Note: it is necessary to treat policy as an unsigned int,
 982  * with the corresponding cast to a signed int to insure that the
 983  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 984  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 985  */
 986 asmlinkage long sys32_sched_get_priority_min(u32 policy)
 987 {
 988         return sys_sched_get_priority_min((int)policy);
 989 }
 990
 991
 992 /* Note: it is necessary to treat pid as an unsigned int,
 993  * with the corresponding cast to a signed int to insure that the
 994  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 995  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 996  */
 997 asmlinkage long sys32_sched_getparam(u32 pid, struct sched_param __user *param)
 998 {
 999         return sys_sched_getparam((int)pid, param);
1000 }
1001
1002
1003 /* Note: it is necessary to treat pid as an unsigned int,
1004  * with the corresponding cast to a signed int to insure that the
1005  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1006  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1007  */
1008 asmlinkage long sys32_sched_getscheduler(u32 pid)
1009 {
1010         return sys_sched_getscheduler((int)pid);
1011 }
1012
1013
1014 /* Note: it is necessary to treat pid as an unsigned int,
1015  * with the corresponding cast to a signed int to insure that the
1016  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1017  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1018  */
1019 asmlinkage long sys32_sched_setparam(u32 pid, struct sched_param __user *param)
1020 {
1021         return sys_sched_setparam((int)pid, param);
1022 }
1023
1024
1025 /* Note: it is necessary to treat pid and policy as unsigned ints,
1026  * with the corresponding cast to a signed int to insure that the
1027  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1028  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1029  */
1030 asmlinkage long sys32_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
1031 {
1032         return sys_sched_setscheduler((int)pid, (int)policy, param);
1033 }
1034
1035
1036 /* Note: it is necessary to treat len as an unsigned int,
1037  * with the corresponding cast to a signed int to insure that the
1038  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1039  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1040  */
1041 asmlinkage long sys32_setdomainname(char __user *name, u32 len)
1042 {
1043         return sys_setdomainname(name, (int)len);
1044 }
1045
1046
1047 /* Note: it is necessary to treat gidsetsize as an unsigned int,
1048  * with the corresponding cast to a signed int to insure that the
1049  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1050  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1051  */
1052 asmlinkage long sys32_setgroups(u32 gidsetsize, gid_t __user *grouplist)
1053 {
1054         return sys_setgroups((int)gidsetsize, grouplist);
1055 }
1056
1057
1058 asmlinkage long sys32_sethostname(char __user *name, u32 len)
1059 {
1060         /* sign extend len */
1061         return sys_sethostname(name, (int)len);
1062 }
1063
1064
1065 /* Note: it is necessary to treat pid and pgid as unsigned ints,
1066  * with the corresponding cast to a signed int to insure that the
1067  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1068  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1069  */
1070 asmlinkage long sys32_setpgid(u32 pid, u32 pgid)
1071 {
1072         return sys_setpgid((int)pid, (int)pgid);
1073 }
1074
1075
1076 long sys32_setpriority(u32 which, u32 who, u32 niceval)
1077 {
1078         /* sign extend which, who and niceval */
1079         return sys_setpriority((int)which, (int)who, (int)niceval);
1080 }
1081
1082 /* Note: it is necessary to treat newmask as an unsigned int,
1083  * with the corresponding cast to a signed int to insure that the
1084  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1085  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1086  */
1087 asmlinkage long sys32_ssetmask(u32 newmask)
1088 {
1089         return sys_ssetmask((int) newmask);
1090 }
1091
1092 asmlinkage long sys32_syslog(u32 type, char __user * buf, u32 len)
1093 {
1094         /* sign extend len */
1095         return sys_syslog(type, buf, (int)len);
1096 }
1097
1098
1099 /* Note: it is necessary to treat mask as an unsigned int,
1100  * with the corresponding cast to a signed int to insure that the
1101  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1102  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1103  */
1104 asmlinkage long sys32_umask(u32 mask)
1105 {
1106         return sys_umask((int)mask);
1107 }
1108
1109 #ifdef CONFIG_SYSCTL
1110 struct __sysctl_args32 {
1111         u32 name;
1112         int nlen;
1113         u32 oldval;
1114         u32 oldlenp;
1115         u32 newval;
1116         u32 newlen;
1117         u32 __unused[4];
1118 };
1119
1120 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1121 {
1122         struct __sysctl_args32 tmp;
1123         int error;
1124         size_t oldlen;
1125         size_t __user *oldlenp = NULL;
1126         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1127
1128         if (copy_from_user(&tmp, args, sizeof(tmp)))
1129                 return -EFAULT;
1130
1131         if (tmp.oldval && tmp.oldlenp) {
1132                 /* Duh, this is ugly and might not work if sysctl_args
1133                    is in read-only memory, but do_sysctl does indirectly
1134                    a lot of uaccess in both directions and we'd have to
1135                    basically copy the whole sysctl.c here, and
1136                    glibc's __sysctl uses rw memory for the structure
1137                    anyway.  */
1138                 oldlenp = (size_t __user *)addr;
1139                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
1140                     put_user(oldlen, oldlenp))
1141                         return -EFAULT;
1142         }
1143
1144         lock_kernel();
1145         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
1146                           compat_ptr(tmp.oldval), oldlenp,
1147                           compat_ptr(tmp.newval), tmp.newlen);
1148         unlock_kernel();
1149         if (oldlenp) {
1150                 if (!error) {
1151                         if (get_user(oldlen, oldlenp) ||
1152                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
1153                                 error = -EFAULT;
1154                 }
1155                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
1156         }
1157         return error;
1158 }
1159 #endif
1160
1161 asmlinkage int sys32_olduname(struct oldold_utsname __user * name)
1162 {
1163         int error;
1164
1165         if (!name)
1166                 return -EFAULT;
1167         if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
1168                 return -EFAULT;
1169
1170         down_read(&uts_sem);
1171         error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
1172         error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
1173         error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
1174         error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
1175         error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
1176         error -= __put_user(0,name->release+__OLD_UTS_LEN);
1177         error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
1178         error -= __put_user(0,name->version+__OLD_UTS_LEN);
1179         error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
1180         error = __put_user(0,name->machine+__OLD_UTS_LEN);
1181         up_read(&uts_sem);
1182
1183         error = error ? -EFAULT : 0;
1184
1185         return error;
1186 }
1187
1188 unsigned long sys32_mmap2(unsigned long addr, size_t len,
1189                           unsigned long prot, unsigned long flags,
1190                           unsigned long fd, unsigned long pgoff)
1191 {
1192         /* This should remain 12 even if PAGE_SIZE changes */
1193         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
1194 }
1195
1196 int get_compat_timeval(struct timeval *tv, struct compat_timeval __user *ctv)
1197 {
1198         return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||
1199                 __get_user(tv->tv_sec, &ctv->tv_sec) ||
1200                 __get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
1201 }
1202
1203 asmlinkage long sys32_utimes(char __user *filename, struct compat_timeval __user *tvs)
1204 {
1205         struct timeval ktvs[2], *ptr;
1206
1207         ptr = NULL;
1208         if (tvs) {
1209                 if (get_compat_timeval(&ktvs[0], &tvs[0]) ||
1210                     get_compat_timeval(&ktvs[1], &tvs[1]))
1211                         return -EFAULT;
1212                 ptr = ktvs;
1213         }
1214
1215         return do_utimes(filename, ptr);
1216 }
1217
1218 long sys32_tgkill(u32 tgid, u32 pid, int sig)
1219 {
1220         /* sign extend tgid, pid */
1221         return sys_tgkill((int)tgid, (int)pid, sig);
1222 }
1223
1224 /*
1225  * long long munging:
1226  * The 32 bit ABI passes long longs in an odd even register pair.
1227  */
1228
1229 compat_ssize_t sys32_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
1230                              u32 reg6, u32 poshi, u32 poslo)
1231 {
1232         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
1233 }
1234
1235 compat_ssize_t sys32_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
1236                               u32 reg6, u32 poshi, u32 poslo)
1237 {
1238         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
1239 }
1240
1241 compat_ssize_t sys32_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
1242 {
1243         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
1244 }
1245
1246 asmlinkage int sys32_truncate64(const char __user * path, u32 reg4,
1247                                 unsigned long high, unsigned long low)
1248 {
1249         return sys_truncate(path, (high << 32) | low);
1250 }
1251
1252 asmlinkage int sys32_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
1253                                  unsigned long low)
1254 {
1255         return sys_ftruncate(fd, (high << 32) | low);
1256 }
1257
1258 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
1259                           size_t len)
1260 {
1261         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
1262                                   buf, len);
1263 }
1264
1265 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
1266                      size_t len, int advice)
1267 {
1268         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
1269                              advice);
1270 }
1271
1272 long ppc32_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
1273                         u32 len_high, u32 len_low)
1274 {
1275         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
1276                              (u64)len_high << 32 | len_low, advice);
1277 }
1278
1279 extern asmlinkage long sys_timer_create(clockid_t, sigevent_t __user *, timer_t __user *);
1280
1281 long ppc32_timer_create(clockid_t clock,
1282                         struct compat_sigevent __user *ev32,
1283                         timer_t __user *timer_id)
1284 {
1285         sigevent_t event;
1286         timer_t t;
1287         long err;
1288         mm_segment_t savefs;
1289
1290         if (ev32 == NULL)
1291                 return sys_timer_create(clock, NULL, timer_id);
1292
1293         if (get_compat_sigevent(&event, ev32))
1294                 return -EFAULT;
1295
1296         if (!access_ok(VERIFY_WRITE, timer_id, sizeof(timer_t)))
1297                 return -EFAULT;
1298
1299         savefs = get_fs();
1300         set_fs(KERNEL_DS);
1301         /* The __user pointer casts are valid due to the set_fs() */
1302         err = sys_timer_create(clock,
1303                 (sigevent_t __user *) &event,
1304                 (timer_t __user *) &t);
1305         set_fs(savefs);
1306
1307         if (err == 0)
1308                 err = __put_user(t, timer_id);
1309
1310         return err;
1311 }
1312
1313 asmlinkage long sys32_add_key(const char __user *_type,
1314                               const char __user *_description,
1315                               const void __user *_payload,
1316                               u32 plen,
1317                               u32 ringid)
1318 {
1319         return sys_add_key(_type, _description, _payload, plen, ringid);
1320 }
1321
1322 asmlinkage long sys32_request_key(const char __user *_type,
1323                                   const char __user *_description,
1324                                   const char __user *_callout_info,
1325                                   u32 destringid)
1326 {
1327         return sys_request_key(_type, _description, _callout_info, destringid);
1328 }
1329