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/poll.h>
  34 #include <linux/personality.h>
  35 #include <linux/stat.h>
  36 #include <linux/mman.h>
  37 #include <linux/in.h>
  38 #include <linux/syscalls.h>
  39 #include <linux/unistd.h>
  40 #include <linux/sysctl.h>
  41 #include <linux/binfmts.h>
  42 #include <linux/security.h>
  43 #include <linux/compat.h>
  44 #include <linux/ptrace.h>
  45 #include <linux/elf.h>
  46
  47 #include <asm/ptrace.h>
  48 #include <asm/types.h>
  49 #include <asm/ipc.h>
  50 #include <asm/uaccess.h>
  51 #include <asm/unistd.h>
  52 #include <asm/semaphore.h>
  53 #include <asm/time.h>
  54 #include <asm/mmu_context.h>
  55 #include <asm/systemcfg.h>
  56
  57 #include "pci.h"
  58
  59 /* readdir & getdents */
  60 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  61 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  62
  63 struct old_linux_dirent32 {
  64         u32             d_ino;
  65         u32             d_offset;
  66         unsigned short  d_namlen;
  67         char            d_name[1];
  68 };
  69
  70 struct readdir_callback32 {
  71         struct old_linux_dirent32 __user * dirent;
  72         int count;
  73 };
  74
  75 static int fillonedir(void * __buf, const char * name, int namlen,
  76                                   off_t offset, ino_t ino, unsigned int d_type)
  77 {
  78         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  79         struct old_linux_dirent32 __user * dirent;
  80
  81         if (buf->count)
  82                 return -EINVAL;
  83         buf->count++;
  84         dirent = buf->dirent;
  85         put_user(ino, &dirent->d_ino);
  86         put_user(offset, &dirent->d_offset);
  87         put_user(namlen, &dirent->d_namlen);
  88         copy_to_user(dirent->d_name, name, namlen);
  89         put_user(0, dirent->d_name + namlen);
  90         return 0;
  91 }
  92
  93 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  94 {
  95         int error = -EBADF;
  96         struct file * file;
  97         struct readdir_callback32 buf;
  98
  99         file = fget(fd);
 100         if (!file)
 101                 goto out;
 102
 103         buf.count = 0;
 104         buf.dirent = dirent;
 105
 106         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 107         if (error < 0)
 108                 goto out_putf;
 109         error = buf.count;
 110
 111 out_putf:
 112         fput(file);
 113 out:
 114         return error;
 115 }
 116
 117 struct linux_dirent32 {
 118         u32             d_ino;
 119         u32             d_off;
 120         unsigned short  d_reclen;
 121         char            d_name[1];
 122 };
 123
 124 struct getdents_callback32 {
 125         struct linux_dirent32 __user * current_dir;
 126         struct linux_dirent32 __user * previous;
 127         int count;
 128         int error;
 129 };
 130
 131 static int filldir(void * __buf, const char * name, int namlen, off_t offset,
 132                    ino_t ino, unsigned int d_type)
 133 {
 134         struct linux_dirent32 __user * dirent;
 135         struct getdents_callback32 * buf = (struct getdents_callback32 *) __buf;
 136         int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
 137
 138         buf->error = -EINVAL;   /* only used if we fail.. */
 139         if (reclen > buf->count)
 140                 return -EINVAL;
 141         dirent = buf->previous;
 142         if (dirent) {
 143                 if (__put_user(offset, &dirent->d_off))
 144                         goto efault;
 145         }
 146         dirent = buf->current_dir;
 147         if (__put_user(ino, &dirent->d_ino))
 148                 goto efault;
 149         if (__put_user(reclen, &dirent->d_reclen))
 150                 goto efault;
 151         if (copy_to_user(dirent->d_name, name, namlen))
 152                 goto efault;
 153         if (__put_user(0, dirent->d_name + namlen))
 154                 goto efault;
 155         if (__put_user(d_type, (char __user *) dirent + reclen - 1))
 156                 goto efault;
 157         buf->previous = dirent;
 158         dirent = (void __user *)dirent + reclen;
 159         buf->current_dir = dirent;
 160         buf->count -= reclen;
 161         return 0;
 162 efault:
 163         buf->error = -EFAULT;
 164         return -EFAULT;
 165 }
 166
 167 asmlinkage long sys32_getdents(unsigned int fd, struct linux_dirent32 __user *dirent,
 168                     unsigned int count)
 169 {
 170         struct file * file;
 171         struct linux_dirent32 __user * lastdirent;
 172         struct getdents_callback32 buf;
 173         int error;
 174
 175         error = -EFAULT;
 176         if (!access_ok(VERIFY_WRITE, dirent, count))
 177                 goto out;
 178
 179         error = -EBADF;
 180         file = fget(fd);
 181         if (!file)
 182                 goto out;
 183
 184         buf.current_dir = dirent;
 185         buf.previous = NULL;
 186         buf.count = count;
 187         buf.error = 0;
 188
 189         error = vfs_readdir(file, (filldir_t)filldir, &buf);
 190         if (error < 0)
 191                 goto out_putf;
 192         error = buf.error;
 193         lastdirent = buf.previous;
 194         if (lastdirent) {
 195                 if (put_user(file->f_pos, &lastdirent->d_off))
 196                         error = -EFAULT;
 197                 else
 198                         error = count - buf.count;
 199         }
 200
 201 out_putf:
 202         fput(file);
 203 out:
 204         return error;
 205 }
 206
 207 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 208                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 209                 compat_uptr_t tvp_x)
 210 {
 211         /* sign extend n */
 212         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 213 }
 214
 215 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 216 {
 217         long err;
 218
 219         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 220             !new_valid_dev(stat->rdev))
 221                 return -EOVERFLOW;
 222
 223         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 224         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 225         err |= __put_user(stat->ino, &statbuf->st_ino);
 226         err |= __put_user(stat->mode, &statbuf->st_mode);
 227         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 228         err |= __put_user(stat->uid, &statbuf->st_uid);
 229         err |= __put_user(stat->gid, &statbuf->st_gid);
 230         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 231         err |= __put_user(stat->size, &statbuf->st_size);
 232         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 233         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 234         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 235         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 236         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 237         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 238         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 239         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 240         err |= __put_user(0, &statbuf->__unused4[0]);
 241         err |= __put_user(0, &statbuf->__unused4[1]);
 242
 243         return err;
 244 }
 245
 246 /* Note: it is necessary to treat option 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  */
 251 asmlinkage long sys32_sysfs(u32 option, u32 arg1, u32 arg2)
 252 {
 253         return sys_sysfs((int)option, arg1, arg2);
 254 }
 255
 256 /* Handle adjtimex compatibility. */
 257 struct timex32 {
 258         u32 modes;
 259         s32 offset, freq, maxerror, esterror;
 260         s32 status, constant, precision, tolerance;
 261         struct compat_timeval time;
 262         s32 tick;
 263         s32 ppsfreq, jitter, shift, stabil;
 264         s32 jitcnt, calcnt, errcnt, stbcnt;
 265         s32  :32; s32  :32; s32  :32; s32  :32;
 266         s32  :32; s32  :32; s32  :32; s32  :32;
 267         s32  :32; s32  :32; s32  :32; s32  :32;
 268 };
 269
 270 extern int do_adjtimex(struct timex *);
 271 extern void ppc_adjtimex(void);
 272
 273 asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 274 {
 275         struct timex txc;
 276         int ret;
 277
 278         memset(&txc, 0, sizeof(struct timex));
 279
 280         if(get_user(txc.modes, &utp->modes) ||
 281            __get_user(txc.offset, &utp->offset) ||
 282            __get_user(txc.freq, &utp->freq) ||
 283            __get_user(txc.maxerror, &utp->maxerror) ||
 284            __get_user(txc.esterror, &utp->esterror) ||
 285            __get_user(txc.status, &utp->status) ||
 286            __get_user(txc.constant, &utp->constant) ||
 287            __get_user(txc.precision, &utp->precision) ||
 288            __get_user(txc.tolerance, &utp->tolerance) ||
 289            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 290            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 291            __get_user(txc.tick, &utp->tick) ||
 292            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 293            __get_user(txc.jitter, &utp->jitter) ||
 294            __get_user(txc.shift, &utp->shift) ||
 295            __get_user(txc.stabil, &utp->stabil) ||
 296            __get_user(txc.jitcnt, &utp->jitcnt) ||
 297            __get_user(txc.calcnt, &utp->calcnt) ||
 298            __get_user(txc.errcnt, &utp->errcnt) ||
 299            __get_user(txc.stbcnt, &utp->stbcnt))
 300                 return -EFAULT;
 301
 302         ret = do_adjtimex(&txc);
 303
 304         /* adjust the conversion of TB to time of day to track adjtimex */
 305         ppc_adjtimex();
 306
 307         if(put_user(txc.modes, &utp->modes) ||
 308            __put_user(txc.offset, &utp->offset) ||
 309            __put_user(txc.freq, &utp->freq) ||
 310            __put_user(txc.maxerror, &utp->maxerror) ||
 311            __put_user(txc.esterror, &utp->esterror) ||
 312            __put_user(txc.status, &utp->status) ||
 313            __put_user(txc.constant, &utp->constant) ||
 314            __put_user(txc.precision, &utp->precision) ||
 315            __put_user(txc.tolerance, &utp->tolerance) ||
 316            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 317            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 318            __put_user(txc.tick, &utp->tick) ||
 319            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 320            __put_user(txc.jitter, &utp->jitter) ||
 321            __put_user(txc.shift, &utp->shift) ||
 322            __put_user(txc.stabil, &utp->stabil) ||
 323            __put_user(txc.jitcnt, &utp->jitcnt) ||
 324            __put_user(txc.calcnt, &utp->calcnt) ||
 325            __put_user(txc.errcnt, &utp->errcnt) ||
 326            __put_user(txc.stbcnt, &utp->stbcnt))
 327                 ret = -EFAULT;
 328
 329         return ret;
 330 }
 331
 332 asmlinkage long sys32_pause(void)
 333 {
 334         current->state = TASK_INTERRUPTIBLE;
 335         schedule();
 336
 337         return -ERESTARTNOHAND;
 338 }
 339
 340 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 341 {
 342         long usec;
 343
 344         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 345                 return -EFAULT;
 346         if (__get_user(o->tv_sec, &i->tv_sec))
 347                 return -EFAULT;
 348         if (__get_user(usec, &i->tv_usec))
 349                 return -EFAULT;
 350         o->tv_nsec = usec * 1000;
 351         return 0;
 352 }
 353
 354 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 355 {
 356         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 357                 (__put_user(i->tv_sec, &o->tv_sec) |
 358                  __put_user(i->tv_usec, &o->tv_usec)));
 359 }
 360
 361 struct sysinfo32 {
 362         s32 uptime;
 363         u32 loads[3];
 364         u32 totalram;
 365         u32 freeram;
 366         u32 sharedram;
 367         u32 bufferram;
 368         u32 totalswap;
 369         u32 freeswap;
 370         unsigned short procs;
 371         unsigned short pad;
 372         u32 totalhigh;
 373         u32 freehigh;
 374         u32 mem_unit;
 375         char _f[20-2*sizeof(int)-sizeof(int)];
 376 };
 377
 378 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 379 {
 380         struct sysinfo s;
 381         int ret, err;
 382         int bitcount=0;
 383         mm_segment_t old_fs = get_fs ();
 384
 385         /* The __user cast is valid due to set_fs() */
 386         set_fs (KERNEL_DS);
 387         ret = sys_sysinfo((struct sysinfo __user *)&s);
 388         set_fs (old_fs);
 389
 390         /* Check to see if any memory value is too large for 32-bit and
 391          * scale down if needed.
 392          */
 393         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 394             while (s.mem_unit < PAGE_SIZE) {
 395                 s.mem_unit <<= 1;
 396                 bitcount++;
 397             }
 398             s.totalram >>=bitcount;
 399             s.freeram >>= bitcount;
 400             s.sharedram >>= bitcount;
 401             s.bufferram >>= bitcount;
 402             s.totalswap >>= bitcount;
 403             s.freeswap >>= bitcount;
 404             s.totalhigh >>= bitcount;
 405             s.freehigh >>= bitcount;
 406         }
 407
 408         err = put_user (s.uptime, &info->uptime);
 409         err |= __put_user (s.loads[0], &info->loads[0]);
 410         err |= __put_user (s.loads[1], &info->loads[1]);
 411         err |= __put_user (s.loads[2], &info->loads[2]);
 412         err |= __put_user (s.totalram, &info->totalram);
 413         err |= __put_user (s.freeram, &info->freeram);
 414         err |= __put_user (s.sharedram, &info->sharedram);
 415         err |= __put_user (s.bufferram, &info->bufferram);
 416         err |= __put_user (s.totalswap, &info->totalswap);
 417         err |= __put_user (s.freeswap, &info->freeswap);
 418         err |= __put_user (s.procs, &info->procs);
 419         err |= __put_user (s.totalhigh, &info->totalhigh);
 420         err |= __put_user (s.freehigh, &info->freehigh);
 421         err |= __put_user (s.mem_unit, &info->mem_unit);
 422         if (err)
 423                 return -EFAULT;
 424
 425         return ret;
 426 }
 427
 428
 429
 430
 431 /* Translations due to time_t size differences.  Which affects all
 432    sorts of things, like timeval and itimerval.  */
 433 extern struct timezone sys_tz;
 434
 435 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 436 {
 437         if (tv) {
 438                 struct timeval ktv;
 439                 do_gettimeofday(&ktv);
 440                 if (put_tv32(tv, &ktv))
 441                         return -EFAULT;
 442         }
 443         if (tz) {
 444                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 445                         return -EFAULT;
 446         }
 447
 448         return 0;
 449 }
 450
 451
 452
 453 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 454 {
 455         struct timespec kts;
 456         struct timezone ktz;
 457
 458         if (tv) {
 459                 if (get_ts32(&kts, tv))
 460                         return -EFAULT;
 461         }
 462         if (tz) {
 463                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 464                         return -EFAULT;
 465         }
 466
 467         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 468 }
 469
 470 #ifdef CONFIG_SYSVIPC
 471 long sys32_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 472                u32 fifth)
 473 {
 474         int version;
 475
 476         version = call >> 16; /* hack for backward compatibility */
 477         call &= 0xffff;
 478
 479         switch (call) {
 480
 481         case SEMTIMEDOP:
 482                 if (fifth)
 483                         /* sign extend semid */
 484                         return compat_sys_semtimedop((int)first,
 485                                                      compat_ptr(ptr), second,
 486                                                      compat_ptr(fifth));
 487                 /* else fall through for normal semop() */
 488         case SEMOP:
 489                 /* struct sembuf is the same on 32 and 64bit :)) */
 490                 /* sign extend semid */
 491                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 492                                       NULL);
 493         case SEMGET:
 494                 /* sign extend key, nsems */
 495                 return sys_semget((int)first, (int)second, third);
 496         case SEMCTL:
 497                 /* sign extend semid, semnum */
 498                 return compat_sys_semctl((int)first, (int)second, third,
 499                                          compat_ptr(ptr));
 500
 501         case MSGSND:
 502                 /* sign extend msqid */
 503                 return compat_sys_msgsnd((int)first, (int)second, third,
 504                                          compat_ptr(ptr));
 505         case MSGRCV:
 506                 /* sign extend msqid, msgtyp */
 507                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 508                                          third, version, compat_ptr(ptr));
 509         case MSGGET:
 510                 /* sign extend key */
 511                 return sys_msgget((int)first, second);
 512         case MSGCTL:
 513                 /* sign extend msqid */
 514                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 515
 516         case SHMAT:
 517                 /* sign extend shmid */
 518                 return compat_sys_shmat((int)first, second, third, version,
 519                                         compat_ptr(ptr));
 520         case SHMDT:
 521                 return sys_shmdt(compat_ptr(ptr));
 522         case SHMGET:
 523                 /* sign extend key_t */
 524                 return sys_shmget((int)first, second, third);
 525         case SHMCTL:
 526                 /* sign extend shmid */
 527                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 528
 529         default:
 530                 return -ENOSYS;
 531         }
 532
 533         return -ENOSYS;
 534 }
 535 #endif
 536
 537 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 538  * with the corresponding cast to a signed int to insure that the
 539  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 540  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 541  */
 542 asmlinkage long sys32_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 543 {
 544         mm_segment_t old_fs = get_fs();
 545         int ret;
 546         off_t of;
 547         off_t __user *up;
 548
 549         if (offset && get_user(of, offset))
 550                 return -EFAULT;
 551
 552         /* The __user pointer cast is valid because of the set_fs() */
 553         set_fs(KERNEL_DS);
 554         up = offset ? (off_t __user *) &of : NULL;
 555         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 556         set_fs(old_fs);
 557
 558         if (offset && put_user(of, offset))
 559                 return -EFAULT;
 560
 561         return ret;
 562 }
 563
 564 asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 565 {
 566         mm_segment_t old_fs = get_fs();
 567         int ret;
 568         loff_t lof;
 569         loff_t __user *up;
 570
 571         if (offset && get_user(lof, offset))
 572                 return -EFAULT;
 573
 574         /* The __user pointer cast is valid because of the set_fs() */
 575         set_fs(KERNEL_DS);
 576         up = offset ? (loff_t __user *) &lof : NULL;
 577         ret = sys_sendfile64(out_fd, in_fd, up, count);
 578         set_fs(old_fs);
 579
 580         if (offset && put_user(lof, offset))
 581                 return -EFAULT;
 582
 583         return ret;
 584 }
 585
 586 long sys32_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 587                   unsigned long a3, unsigned long a4, unsigned long a5,
 588                   struct pt_regs *regs)
 589 {
 590         int error;
 591         char * filename;
 592
 593         filename = getname((char __user *) a0);
 594         error = PTR_ERR(filename);
 595         if (IS_ERR(filename))
 596                 goto out;
 597         flush_fp_to_thread(current);
 598         flush_altivec_to_thread(current);
 599
 600         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 601
 602         if (error == 0) {
 603                 task_lock(current);
 604                 current->ptrace &= ~PT_DTRACE;
 605                 task_unlock(current);
 606         }
 607         putname(filename);
 608
 609 out:
 610         return error;
 611 }
 612
 613 /* Set up a thread for executing a new program. */
 614 void start_thread32(struct pt_regs* regs, unsigned long nip, unsigned long sp)
 615 {
 616         set_fs(USER_DS);
 617
 618         /*
 619          * If we exec out of a kernel thread then thread.regs will not be
 620          * set. Do it now.
 621          */
 622         if (!current->thread.regs) {
 623                 unsigned long childregs = (unsigned long)current->thread_info +
 624                                                 THREAD_SIZE;
 625                 childregs -= sizeof(struct pt_regs);
 626                 current->thread.regs = (struct pt_regs *)childregs;
 627         }
 628
 629         /*
 630          * ELF_PLAT_INIT already clears all registers but it also sets r2.
 631          * So just clear r2 here.
 632          */
 633         regs->gpr[2] = 0;
 634
 635         regs->nip = nip;
 636         regs->gpr[1] = sp;
 637         regs->msr = MSR_USER32;
 638 #ifndef CONFIG_SMP
 639         if (last_task_used_math == current)
 640                 last_task_used_math = 0;
 641 #endif /* CONFIG_SMP */
 642         current->thread.fpscr = 0;
 643         memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
 644 #ifdef CONFIG_ALTIVEC
 645 #ifndef CONFIG_SMP
 646         if (last_task_used_altivec == current)
 647                 last_task_used_altivec = 0;
 648 #endif /* CONFIG_SMP */
 649         memset(current->thread.vr, 0, sizeof(current->thread.vr));
 650         current->thread.vscr.u[0] = 0;
 651         current->thread.vscr.u[1] = 0;
 652         current->thread.vscr.u[2] = 0;
 653         current->thread.vscr.u[3] = 0x00010000; /* Java mode disabled */
 654         current->thread.vrsave = 0;
 655         current->thread.used_vr = 0;
 656 #endif /* CONFIG_ALTIVEC */
 657 }
 658
 659 /* Note: it is necessary to treat option as an unsigned int,
 660  * with the corresponding cast to a signed int to insure that the
 661  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 662  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 663  */
 664 asmlinkage long sys32_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 665 {
 666         return sys_prctl((int)option,
 667                          (unsigned long) arg2,
 668                          (unsigned long) arg3,
 669                          (unsigned long) arg4,
 670                          (unsigned long) arg5);
 671 }
 672
 673 /* Note: it is necessary to treat pid as an unsigned int,
 674  * with the corresponding cast to a signed int to insure that the
 675  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 676  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 677  */
 678 asmlinkage long sys32_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 679 {
 680         struct timespec t;
 681         int ret;
 682         mm_segment_t old_fs = get_fs ();
 683
 684         /* The __user pointer cast is valid because of the set_fs() */
 685         set_fs (KERNEL_DS);
 686         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 687         set_fs (old_fs);
 688         if (put_compat_timespec(&t, interval))
 689                 return -EFAULT;
 690         return ret;
 691 }
 692
 693 asmlinkage int sys32_pciconfig_read(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf)
 694 {
 695         return sys_pciconfig_read((unsigned long) bus,
 696                                   (unsigned long) dfn,
 697                                   (unsigned long) off,
 698                                   (unsigned long) len,
 699                                   compat_ptr(ubuf));
 700 }
 701
 702 asmlinkage int sys32_pciconfig_write(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf)
 703 {
 704         return sys_pciconfig_write((unsigned long) bus,
 705                                    (unsigned long) dfn,
 706                                    (unsigned long) off,
 707                                    (unsigned long) len,
 708                                    compat_ptr(ubuf));
 709 }
 710
 711 #define IOBASE_BRIDGE_NUMBER    0
 712 #define IOBASE_MEMORY           1
 713 #define IOBASE_IO               2
 714 #define IOBASE_ISA_IO           3
 715 #define IOBASE_ISA_MEM          4
 716
 717 asmlinkage int sys32_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn)
 718 {
 719 #ifdef CONFIG_PCI
 720         struct pci_controller* hose;
 721         struct list_head *ln;
 722         struct pci_bus *bus = NULL;
 723         struct device_node *hose_node;
 724
 725         /* Argh ! Please forgive me for that hack, but that's the
 726          * simplest way to get existing XFree to not lockup on some
 727          * G5 machines... So when something asks for bus 0 io base
 728          * (bus 0 is HT root), we return the AGP one instead.
 729          */
 730 #ifdef CONFIG_PPC_PMAC
 731         if (systemcfg->platform == PLATFORM_POWERMAC &&
 732             machine_is_compatible("MacRISC4"))
 733                 if (in_bus == 0)
 734                         in_bus = 0xf0;
 735 #endif /* CONFIG_PPC_PMAC */
 736
 737         /* That syscall isn't quite compatible with PCI domains, but it's
 738          * used on pre-domains setup. We return the first match
 739          */
 740
 741         for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
 742                 bus = pci_bus_b(ln);
 743                 if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
 744                         break;
 745                 bus = NULL;
 746         }
 747         if (bus == NULL || bus->sysdata == NULL)
 748                 return -ENODEV;
 749
 750         hose_node = (struct device_node *)bus->sysdata;
 751         hose = hose_node->phb;
 752
 753         switch (which) {
 754         case IOBASE_BRIDGE_NUMBER:
 755                 return (long)hose->first_busno;
 756         case IOBASE_MEMORY:
 757                 return (long)hose->pci_mem_offset;
 758         case IOBASE_IO:
 759                 return (long)hose->io_base_phys;
 760         case IOBASE_ISA_IO:
 761                 return (long)isa_io_base;
 762         case IOBASE_ISA_MEM:
 763                 return -EINVAL;
 764         }
 765 #endif  /* CONFIG_PCI */
 766         return -EOPNOTSUPP;
 767 }
 768
 769
 770 /* Note: it is necessary to treat mode as an unsigned int,
 771  * with the corresponding cast to a signed int to insure that the
 772  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 773  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 774  */
 775 asmlinkage long sys32_access(const char __user * filename, u32 mode)
 776 {
 777         return sys_access(filename, (int)mode);
 778 }
 779
 780
 781 /* Note: it is necessary to treat mode as an unsigned int,
 782  * with the corresponding cast to a signed int to insure that the
 783  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 784  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 785  */
 786 asmlinkage long sys32_creat(const char __user * pathname, u32 mode)
 787 {
 788         return sys_creat(pathname, (int)mode);
 789 }
 790
 791
 792 /* Note: it is necessary to treat pid and options as unsigned ints,
 793  * with the corresponding cast to a signed int to insure that the
 794  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 795  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 796  */
 797 asmlinkage long sys32_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 798 {
 799         return sys_waitpid((int)pid, stat_addr, (int)options);
 800 }
 801
 802
 803 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 804  * with the corresponding cast to a signed int to insure that the
 805  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 806  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 807  */
 808 asmlinkage long sys32_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 809 {
 810         return sys_getgroups((int)gidsetsize, grouplist);
 811 }
 812
 813
 814 /* Note: it is necessary to treat pid as an unsigned int,
 815  * with the corresponding cast to a signed int to insure that the
 816  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 817  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 818  */
 819 asmlinkage long sys32_getpgid(u32 pid)
 820 {
 821         return sys_getpgid((int)pid);
 822 }
 823
 824
 825
 826 /* Note: it is necessary to treat pid as an unsigned int,
 827  * with the corresponding cast to a signed int to insure that the
 828  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 829  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 830  */
 831 asmlinkage long sys32_getsid(u32 pid)
 832 {
 833         return sys_getsid((int)pid);
 834 }
 835
 836
 837 /* Note: it is necessary to treat pid and sig as unsigned ints,
 838  * with the corresponding cast to a signed int to insure that the
 839  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 840  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 841  */
 842 asmlinkage long sys32_kill(u32 pid, u32 sig)
 843 {
 844         return sys_kill((int)pid, (int)sig);
 845 }
 846
 847
 848 /* Note: it is necessary to treat mode as an unsigned int,
 849  * with the corresponding cast to a signed int to insure that the
 850  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 851  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 852  */
 853 asmlinkage long sys32_mkdir(const char __user * pathname, u32 mode)
 854 {
 855         return sys_mkdir(pathname, (int)mode);
 856 }
 857
 858 long sys32_nice(u32 increment)
 859 {
 860         /* sign extend increment */
 861         return sys_nice((int)increment);
 862 }
 863
 864 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 865 {
 866         /* sign extend n */
 867         return sys_lseek(fd, (int)offset, origin);
 868 }
 869
 870 /*
 871  * This is just a version for 32-bit applications which does
 872  * not force O_LARGEFILE on.
 873  */
 874 asmlinkage long sys32_open(const char __user * filename, int flags, int mode)
 875 {
 876         char * tmp;
 877         int fd, error;
 878
 879         tmp = getname(filename);
 880         fd = PTR_ERR(tmp);
 881         if (!IS_ERR(tmp)) {
 882                 fd = get_unused_fd();
 883                 if (fd >= 0) {
 884                         struct file * f = filp_open(tmp, flags, mode);
 885                         error = PTR_ERR(f);
 886                         if (IS_ERR(f))
 887                                 goto out_error;
 888                         fd_install(fd, f);
 889                 }
 890 out:
 891                 putname(tmp);
 892         }
 893         return fd;
 894
 895 out_error:
 896         put_unused_fd(fd);
 897         fd = error;
 898         goto out;
 899 }
 900
 901 /* Note: it is necessary to treat bufsiz as an unsigned int,
 902  * with the corresponding cast to a signed int to insure that the
 903  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 904  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 905  */
 906 asmlinkage long sys32_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 907 {
 908         return sys_readlink(path, buf, (int)bufsiz);
 909 }
 910
 911 /* Note: it is necessary to treat option as an unsigned int,
 912  * with the corresponding cast to a signed int to insure that the
 913  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 914  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 915  */
 916 asmlinkage long sys32_sched_get_priority_max(u32 policy)
 917 {
 918         return sys_sched_get_priority_max((int)policy);
 919 }
 920
 921
 922 /* Note: it is necessary to treat policy as an unsigned int,
 923  * with the corresponding cast to a signed int to insure that the
 924  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 925  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 926  */
 927 asmlinkage long sys32_sched_get_priority_min(u32 policy)
 928 {
 929         return sys_sched_get_priority_min((int)policy);
 930 }
 931
 932
 933 /* Note: it is necessary to treat pid as an unsigned int,
 934  * with the corresponding cast to a signed int to insure that the
 935  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 936  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 937  */
 938 asmlinkage long sys32_sched_getparam(u32 pid, struct sched_param __user *param)
 939 {
 940         return sys_sched_getparam((int)pid, param);
 941 }
 942
 943
 944 /* Note: it is necessary to treat pid as an unsigned int,
 945  * with the corresponding cast to a signed int to insure that the
 946  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 947  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 948  */
 949 asmlinkage long sys32_sched_getscheduler(u32 pid)
 950 {
 951         return sys_sched_getscheduler((int)pid);
 952 }
 953
 954
 955 /* Note: it is necessary to treat pid as an unsigned int,
 956  * with the corresponding cast to a signed int to insure that the
 957  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 958  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 959  */
 960 asmlinkage long sys32_sched_setparam(u32 pid, struct sched_param __user *param)
 961 {
 962         return sys_sched_setparam((int)pid, param);
 963 }
 964
 965
 966 /* Note: it is necessary to treat pid and policy as unsigned ints,
 967  * with the corresponding cast to a signed int to insure that the
 968  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 969  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 970  */
 971 asmlinkage long sys32_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 972 {
 973         return sys_sched_setscheduler((int)pid, (int)policy, param);
 974 }
 975
 976
 977 /* Note: it is necessary to treat len as an unsigned int,
 978  * with the corresponding cast to a signed int to insure that the
 979  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 980  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 981  */
 982 asmlinkage long sys32_setdomainname(char __user *name, u32 len)
 983 {
 984         return sys_setdomainname(name, (int)len);
 985 }
 986
 987
 988 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 989  * with the corresponding cast to a signed int to insure that the
 990  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 991  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 992  */
 993 asmlinkage long sys32_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 994 {
 995         return sys_setgroups((int)gidsetsize, grouplist);
 996 }
 997
 998
 999 asmlinkage long sys32_sethostname(char __user *name, u32 len)
1000 {
1001         /* sign extend len */
1002         return sys_sethostname(name, (int)len);
1003 }
1004
1005
1006 /* Note: it is necessary to treat pid and pgid as unsigned ints,
1007  * with the corresponding cast to a signed int to insure that the
1008  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1009  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1010  */
1011 asmlinkage long sys32_setpgid(u32 pid, u32 pgid)
1012 {
1013         return sys_setpgid((int)pid, (int)pgid);
1014 }
1015
1016 long sys32_getpriority(u32 which, u32 who)
1017 {
1018         /* sign extend which and who */
1019         return sys_getpriority((int)which, (int)who);
1020 }
1021
1022 long sys32_setpriority(u32 which, u32 who, u32 niceval)
1023 {
1024         /* sign extend which, who and niceval */
1025         return sys_setpriority((int)which, (int)who, (int)niceval);
1026 }
1027
1028 long sys32_ioprio_get(u32 which, u32 who)
1029 {
1030         /* sign extend which and who */
1031         return sys_ioprio_get((int)which, (int)who);
1032 }
1033
1034 long sys32_ioprio_set(u32 which, u32 who, u32 ioprio)
1035 {
1036         /* sign extend which, who and ioprio */
1037         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
1038 }
1039
1040 /* Note: it is necessary to treat newmask as an unsigned int,
1041  * with the corresponding cast to a signed int to insure that the
1042  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1043  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1044  */
1045 asmlinkage long sys32_ssetmask(u32 newmask)
1046 {
1047         return sys_ssetmask((int) newmask);
1048 }
1049
1050 asmlinkage long sys32_syslog(u32 type, char __user * buf, u32 len)
1051 {
1052         /* sign extend len */
1053         return sys_syslog(type, buf, (int)len);
1054 }
1055
1056
1057 /* Note: it is necessary to treat mask as an unsigned int,
1058  * with the corresponding cast to a signed int to insure that the
1059  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
1060  * and the register representation of a signed int (msr in 64-bit mode) is performed.
1061  */
1062 asmlinkage long sys32_umask(u32 mask)
1063 {
1064         return sys_umask((int)mask);
1065 }
1066
1067 #ifdef CONFIG_SYSCTL
1068 struct __sysctl_args32 {
1069         u32 name;
1070         int nlen;
1071         u32 oldval;
1072         u32 oldlenp;
1073         u32 newval;
1074         u32 newlen;
1075         u32 __unused[4];
1076 };
1077
1078 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1079 {
1080         struct __sysctl_args32 tmp;
1081         int error;
1082         size_t oldlen;
1083         size_t __user *oldlenp = NULL;
1084         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1085
1086         if (copy_from_user(&tmp, args, sizeof(tmp)))
1087                 return -EFAULT;
1088
1089         if (tmp.oldval && tmp.oldlenp) {
1090                 /* Duh, this is ugly and might not work if sysctl_args
1091                    is in read-only memory, but do_sysctl does indirectly
1092                    a lot of uaccess in both directions and we'd have to
1093                    basically copy the whole sysctl.c here, and
1094                    glibc's __sysctl uses rw memory for the structure
1095                    anyway.  */
1096                 oldlenp = (size_t __user *)addr;
1097                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
1098                     put_user(oldlen, oldlenp))
1099                         return -EFAULT;
1100         }
1101
1102         lock_kernel();
1103         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
1104                           compat_ptr(tmp.oldval), oldlenp,
1105                           compat_ptr(tmp.newval), tmp.newlen);
1106         unlock_kernel();
1107         if (oldlenp) {
1108                 if (!error) {
1109                         if (get_user(oldlen, oldlenp) ||
1110                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
1111                                 error = -EFAULT;
1112                 }
1113                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
1114         }
1115         return error;
1116 }
1117 #endif
1118
1119 asmlinkage int sys32_uname(struct old_utsname __user * name)
1120 {
1121         int err = 0;
1122
1123         down_read(&uts_sem);
1124         if (copy_to_user(name, &system_utsname, sizeof(*name)))
1125                 err = -EFAULT;
1126         up_read(&uts_sem);
1127         if (!err && personality(current->personality) == PER_LINUX32) {
1128                 /* change "ppc64" to "ppc" */
1129                 if (__put_user(0, name->machine + 3)
1130                     || __put_user(0, name->machine + 4))
1131                         err = -EFAULT;
1132         }
1133         return err;
1134 }
1135
1136 asmlinkage int sys32_olduname(struct oldold_utsname __user * name)
1137 {
1138         int error;
1139
1140         if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
1141                 return -EFAULT;
1142
1143         down_read(&uts_sem);
1144         error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
1145         error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
1146         error |= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
1147         error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
1148         error |= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
1149         error |= __put_user(0,name->release+__OLD_UTS_LEN);
1150         error |= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
1151         error |= __put_user(0,name->version+__OLD_UTS_LEN);
1152         error |= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
1153         error |= __put_user(0,name->machine+__OLD_UTS_LEN);
1154         if (personality(current->personality) == PER_LINUX32) {
1155                 /* change "ppc64" to "ppc" */
1156                 error |= __put_user(0, name->machine + 3);
1157                 error |= __put_user(0, name->machine + 4);
1158         }
1159
1160         up_read(&uts_sem);
1161
1162         error = error ? -EFAULT : 0;
1163
1164         return error;
1165 }
1166
1167 unsigned long sys32_mmap2(unsigned long addr, size_t len,
1168                           unsigned long prot, unsigned long flags,
1169                           unsigned long fd, unsigned long pgoff)
1170 {
1171         /* This should remain 12 even if PAGE_SIZE changes */
1172         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
1173 }
1174
1175 int get_compat_timeval(struct timeval *tv, struct compat_timeval __user *ctv)
1176 {
1177         return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||
1178                 __get_user(tv->tv_sec, &ctv->tv_sec) ||
1179                 __get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
1180 }
1181
1182 asmlinkage long sys32_utimes(char __user *filename, struct compat_timeval __user *tvs)
1183 {
1184         struct timeval ktvs[2], *ptr;
1185
1186         ptr = NULL;
1187         if (tvs) {
1188                 if (get_compat_timeval(&ktvs[0], &tvs[0]) ||
1189                     get_compat_timeval(&ktvs[1], &tvs[1]))
1190                         return -EFAULT;
1191                 ptr = ktvs;
1192         }
1193
1194         return do_utimes(filename, ptr);
1195 }
1196
1197 long sys32_tgkill(u32 tgid, u32 pid, int sig)
1198 {
1199         /* sign extend tgid, pid */
1200         return sys_tgkill((int)tgid, (int)pid, sig);
1201 }
1202
1203 /*
1204  * long long munging:
1205  * The 32 bit ABI passes long longs in an odd even register pair.
1206  */
1207
1208 compat_ssize_t sys32_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
1209                              u32 reg6, u32 poshi, u32 poslo)
1210 {
1211         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
1212 }
1213
1214 compat_ssize_t sys32_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
1215                               u32 reg6, u32 poshi, u32 poslo)
1216 {
1217         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
1218 }
1219
1220 compat_ssize_t sys32_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
1221 {
1222         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
1223 }
1224
1225 asmlinkage int sys32_truncate64(const char __user * path, u32 reg4,
1226                                 unsigned long high, unsigned long low)
1227 {
1228         return sys_truncate(path, (high << 32) | low);
1229 }
1230
1231 asmlinkage int sys32_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
1232                                  unsigned long low)
1233 {
1234         return sys_ftruncate(fd, (high << 32) | low);
1235 }
1236
1237 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
1238                           size_t len)
1239 {
1240         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
1241                                   buf, len);
1242 }
1243
1244 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
1245                      size_t len, int advice)
1246 {
1247         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
1248                              advice);
1249 }
1250
1251 long ppc32_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
1252                         u32 len_high, u32 len_low)
1253 {
1254         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
1255                              (u64)len_high << 32 | len_low, advice);
1256 }
1257
1258 long ppc32_timer_create(clockid_t clock,
1259                         struct compat_sigevent __user *ev32,
1260                         timer_t __user *timer_id)
1261 {
1262         sigevent_t event;
1263         timer_t t;
1264         long err;
1265         mm_segment_t savefs;
1266
1267         if (ev32 == NULL)
1268                 return sys_timer_create(clock, NULL, timer_id);
1269
1270         if (get_compat_sigevent(&event, ev32))
1271                 return -EFAULT;
1272
1273         if (!access_ok(VERIFY_WRITE, timer_id, sizeof(timer_t)))
1274                 return -EFAULT;
1275
1276         savefs = get_fs();
1277         set_fs(KERNEL_DS);
1278         /* The __user pointer casts are valid due to the set_fs() */
1279         err = sys_timer_create(clock,
1280                 (sigevent_t __user *) &event,
1281                 (timer_t __user *) &t);
1282         set_fs(savefs);
1283
1284         if (err == 0)
1285                 err = __put_user(t, timer_id);
1286
1287         return err;
1288 }
1289
1290 asmlinkage long sys32_add_key(const char __user *_type,
1291                               const char __user *_description,
1292                               const void __user *_payload,
1293                               u32 plen,
1294                               u32 ringid)
1295 {
1296         return sys_add_key(_type, _description, _payload, plen, ringid);
1297 }
1298
1299 asmlinkage long sys32_request_key(const char __user *_type,
1300                                   const char __user *_description,
1301                                   const char __user *_callout_info,
1302                                   u32 destringid)
1303 {
1304         return sys_request_key(_type, _description, _callout_info, destringid);
1305 }
1306