arch/powerpc/kernel/sys_ppc32.c

   1 /*
   2  * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 2001 IBM
   5  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * environment.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/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/ppc-pci.h>
  56
  57 /* readdir & getdents */
  58 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  59 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  60
  61 struct old_linux_dirent32 {
  62         u32             d_ino;
  63         u32             d_offset;
  64         unsigned short  d_namlen;
  65         char            d_name[1];
  66 };
  67
  68 struct readdir_callback32 {
  69         struct old_linux_dirent32 __user * dirent;
  70         int count;
  71 };
  72
  73 static int fillonedir(void * __buf, const char * name, int namlen,
  74                                   off_t offset, ino_t ino, unsigned int d_type)
  75 {
  76         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  77         struct old_linux_dirent32 __user * dirent;
  78
  79         if (buf->count)
  80                 return -EINVAL;
  81         buf->count++;
  82         dirent = buf->dirent;
  83         put_user(ino, &dirent->d_ino);
  84         put_user(offset, &dirent->d_offset);
  85         put_user(namlen, &dirent->d_namlen);
  86         copy_to_user(dirent->d_name, name, namlen);
  87         put_user(0, dirent->d_name + namlen);
  88         return 0;
  89 }
  90
  91 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  92 {
  93         int error = -EBADF;
  94         struct file * file;
  95         struct readdir_callback32 buf;
  96
  97         file = fget(fd);
  98         if (!file)
  99                 goto out;
 100
 101         buf.count = 0;
 102         buf.dirent = dirent;
 103
 104         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 105         if (error < 0)
 106                 goto out_putf;
 107         error = buf.count;
 108
 109 out_putf:
 110         fput(file);
 111 out:
 112         return error;
 113 }
 114
 115 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 116                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 117                 compat_uptr_t tvp_x)
 118 {
 119         /* sign extend n */
 120         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 121 }
 122
 123 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 124 {
 125         long err;
 126
 127         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 128             !new_valid_dev(stat->rdev))
 129                 return -EOVERFLOW;
 130
 131         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 132         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 133         err |= __put_user(stat->ino, &statbuf->st_ino);
 134         err |= __put_user(stat->mode, &statbuf->st_mode);
 135         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 136         err |= __put_user(stat->uid, &statbuf->st_uid);
 137         err |= __put_user(stat->gid, &statbuf->st_gid);
 138         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 139         err |= __put_user(stat->size, &statbuf->st_size);
 140         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 141         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 142         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 143         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 144         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 145         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 146         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 147         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 148         err |= __put_user(0, &statbuf->__unused4[0]);
 149         err |= __put_user(0, &statbuf->__unused4[1]);
 150
 151         return err;
 152 }
 153
 154 /* Note: it is necessary to treat option as an unsigned int,
 155  * with the corresponding cast to a signed int to insure that the
 156  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 157  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 158  */
 159 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 160 {
 161         return sys_sysfs((int)option, arg1, arg2);
 162 }
 163
 164 /* Handle adjtimex compatibility. */
 165 struct timex32 {
 166         u32 modes;
 167         s32 offset, freq, maxerror, esterror;
 168         s32 status, constant, precision, tolerance;
 169         struct compat_timeval time;
 170         s32 tick;
 171         s32 ppsfreq, jitter, shift, stabil;
 172         s32 jitcnt, calcnt, errcnt, stbcnt;
 173         s32  :32; s32  :32; s32  :32; s32  :32;
 174         s32  :32; s32  :32; s32  :32; s32  :32;
 175         s32  :32; s32  :32; s32  :32; s32  :32;
 176 };
 177
 178 extern int do_adjtimex(struct timex *);
 179 extern void ppc_adjtimex(void);
 180
 181 asmlinkage long compat_sys_adjtimex(struct timex32 __user *utp)
 182 {
 183         struct timex txc;
 184         int ret;
 185
 186         memset(&txc, 0, sizeof(struct timex));
 187
 188         if(get_user(txc.modes, &utp->modes) ||
 189            __get_user(txc.offset, &utp->offset) ||
 190            __get_user(txc.freq, &utp->freq) ||
 191            __get_user(txc.maxerror, &utp->maxerror) ||
 192            __get_user(txc.esterror, &utp->esterror) ||
 193            __get_user(txc.status, &utp->status) ||
 194            __get_user(txc.constant, &utp->constant) ||
 195            __get_user(txc.precision, &utp->precision) ||
 196            __get_user(txc.tolerance, &utp->tolerance) ||
 197            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 198            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 199            __get_user(txc.tick, &utp->tick) ||
 200            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 201            __get_user(txc.jitter, &utp->jitter) ||
 202            __get_user(txc.shift, &utp->shift) ||
 203            __get_user(txc.stabil, &utp->stabil) ||
 204            __get_user(txc.jitcnt, &utp->jitcnt) ||
 205            __get_user(txc.calcnt, &utp->calcnt) ||
 206            __get_user(txc.errcnt, &utp->errcnt) ||
 207            __get_user(txc.stbcnt, &utp->stbcnt))
 208                 return -EFAULT;
 209
 210         ret = do_adjtimex(&txc);
 211
 212         /* adjust the conversion of TB to time of day to track adjtimex */
 213         ppc_adjtimex();
 214
 215         if(put_user(txc.modes, &utp->modes) ||
 216            __put_user(txc.offset, &utp->offset) ||
 217            __put_user(txc.freq, &utp->freq) ||
 218            __put_user(txc.maxerror, &utp->maxerror) ||
 219            __put_user(txc.esterror, &utp->esterror) ||
 220            __put_user(txc.status, &utp->status) ||
 221            __put_user(txc.constant, &utp->constant) ||
 222            __put_user(txc.precision, &utp->precision) ||
 223            __put_user(txc.tolerance, &utp->tolerance) ||
 224            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 225            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 226            __put_user(txc.tick, &utp->tick) ||
 227            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 228            __put_user(txc.jitter, &utp->jitter) ||
 229            __put_user(txc.shift, &utp->shift) ||
 230            __put_user(txc.stabil, &utp->stabil) ||
 231            __put_user(txc.jitcnt, &utp->jitcnt) ||
 232            __put_user(txc.calcnt, &utp->calcnt) ||
 233            __put_user(txc.errcnt, &utp->errcnt) ||
 234            __put_user(txc.stbcnt, &utp->stbcnt))
 235                 ret = -EFAULT;
 236
 237         return ret;
 238 }
 239
 240 asmlinkage long compat_sys_pause(void)
 241 {
 242         current->state = TASK_INTERRUPTIBLE;
 243         schedule();
 244
 245         return -ERESTARTNOHAND;
 246 }
 247
 248 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 249 {
 250         long usec;
 251
 252         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 253                 return -EFAULT;
 254         if (__get_user(o->tv_sec, &i->tv_sec))
 255                 return -EFAULT;
 256         if (__get_user(usec, &i->tv_usec))
 257                 return -EFAULT;
 258         o->tv_nsec = usec * 1000;
 259         return 0;
 260 }
 261
 262 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 263 {
 264         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 265                 (__put_user(i->tv_sec, &o->tv_sec) |
 266                  __put_user(i->tv_usec, &o->tv_usec)));
 267 }
 268
 269 struct sysinfo32 {
 270         s32 uptime;
 271         u32 loads[3];
 272         u32 totalram;
 273         u32 freeram;
 274         u32 sharedram;
 275         u32 bufferram;
 276         u32 totalswap;
 277         u32 freeswap;
 278         unsigned short procs;
 279         unsigned short pad;
 280         u32 totalhigh;
 281         u32 freehigh;
 282         u32 mem_unit;
 283         char _f[20-2*sizeof(int)-sizeof(int)];
 284 };
 285
 286 asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
 287 {
 288         struct sysinfo s;
 289         int ret, err;
 290         int bitcount=0;
 291         mm_segment_t old_fs = get_fs ();
 292
 293         /* The __user cast is valid due to set_fs() */
 294         set_fs (KERNEL_DS);
 295         ret = sys_sysinfo((struct sysinfo __user *)&s);
 296         set_fs (old_fs);
 297
 298         /* Check to see if any memory value is too large for 32-bit and
 299          * scale down if needed.
 300          */
 301         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 302             while (s.mem_unit < PAGE_SIZE) {
 303                 s.mem_unit <<= 1;
 304                 bitcount++;
 305             }
 306             s.totalram >>=bitcount;
 307             s.freeram >>= bitcount;
 308             s.sharedram >>= bitcount;
 309             s.bufferram >>= bitcount;
 310             s.totalswap >>= bitcount;
 311             s.freeswap >>= bitcount;
 312             s.totalhigh >>= bitcount;
 313             s.freehigh >>= bitcount;
 314         }
 315
 316         err = put_user (s.uptime, &info->uptime);
 317         err |= __put_user (s.loads[0], &info->loads[0]);
 318         err |= __put_user (s.loads[1], &info->loads[1]);
 319         err |= __put_user (s.loads[2], &info->loads[2]);
 320         err |= __put_user (s.totalram, &info->totalram);
 321         err |= __put_user (s.freeram, &info->freeram);
 322         err |= __put_user (s.sharedram, &info->sharedram);
 323         err |= __put_user (s.bufferram, &info->bufferram);
 324         err |= __put_user (s.totalswap, &info->totalswap);
 325         err |= __put_user (s.freeswap, &info->freeswap);
 326         err |= __put_user (s.procs, &info->procs);
 327         err |= __put_user (s.totalhigh, &info->totalhigh);
 328         err |= __put_user (s.freehigh, &info->freehigh);
 329         err |= __put_user (s.mem_unit, &info->mem_unit);
 330         if (err)
 331                 return -EFAULT;
 332
 333         return ret;
 334 }
 335
 336
 337
 338
 339 /* Translations due to time_t size differences.  Which affects all
 340    sorts of things, like timeval and itimerval.  */
 341 extern struct timezone sys_tz;
 342
 343 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 344 {
 345         if (tv) {
 346                 struct timeval ktv;
 347                 do_gettimeofday(&ktv);
 348                 if (put_tv32(tv, &ktv))
 349                         return -EFAULT;
 350         }
 351         if (tz) {
 352                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 353                         return -EFAULT;
 354         }
 355
 356         return 0;
 357 }
 358
 359
 360
 361 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 362 {
 363         struct timespec kts;
 364         struct timezone ktz;
 365
 366         if (tv) {
 367                 if (get_ts32(&kts, tv))
 368                         return -EFAULT;
 369         }
 370         if (tz) {
 371                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 372                         return -EFAULT;
 373         }
 374
 375         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 376 }
 377
 378 #ifdef CONFIG_SYSVIPC
 379 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 380                u32 fifth)
 381 {
 382         int version;
 383
 384         version = call >> 16; /* hack for backward compatibility */
 385         call &= 0xffff;
 386
 387         switch (call) {
 388
 389         case SEMTIMEDOP:
 390                 if (fifth)
 391                         /* sign extend semid */
 392                         return compat_sys_semtimedop((int)first,
 393                                                      compat_ptr(ptr), second,
 394                                                      compat_ptr(fifth));
 395                 /* else fall through for normal semop() */
 396         case SEMOP:
 397                 /* struct sembuf is the same on 32 and 64bit :)) */
 398                 /* sign extend semid */
 399                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 400                                       NULL);
 401         case SEMGET:
 402                 /* sign extend key, nsems */
 403                 return sys_semget((int)first, (int)second, third);
 404         case SEMCTL:
 405                 /* sign extend semid, semnum */
 406                 return compat_sys_semctl((int)first, (int)second, third,
 407                                          compat_ptr(ptr));
 408
 409         case MSGSND:
 410                 /* sign extend msqid */
 411                 return compat_sys_msgsnd((int)first, (int)second, third,
 412                                          compat_ptr(ptr));
 413         case MSGRCV:
 414                 /* sign extend msqid, msgtyp */
 415                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 416                                          third, version, compat_ptr(ptr));
 417         case MSGGET:
 418                 /* sign extend key */
 419                 return sys_msgget((int)first, second);
 420         case MSGCTL:
 421                 /* sign extend msqid */
 422                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 423
 424         case SHMAT:
 425                 /* sign extend shmid */
 426                 return compat_sys_shmat((int)first, second, third, version,
 427                                         compat_ptr(ptr));
 428         case SHMDT:
 429                 return sys_shmdt(compat_ptr(ptr));
 430         case SHMGET:
 431                 /* sign extend key_t */
 432                 return sys_shmget((int)first, second, third);
 433         case SHMCTL:
 434                 /* sign extend shmid */
 435                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 436
 437         default:
 438                 return -ENOSYS;
 439         }
 440
 441         return -ENOSYS;
 442 }
 443 #endif
 444
 445 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 446  * with the corresponding cast to a signed int to insure that the
 447  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 448  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 449  */
 450 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 451 {
 452         mm_segment_t old_fs = get_fs();
 453         int ret;
 454         off_t of;
 455         off_t __user *up;
 456
 457         if (offset && get_user(of, offset))
 458                 return -EFAULT;
 459
 460         /* The __user pointer cast is valid because of the set_fs() */
 461         set_fs(KERNEL_DS);
 462         up = offset ? (off_t __user *) &of : NULL;
 463         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 464         set_fs(old_fs);
 465
 466         if (offset && put_user(of, offset))
 467                 return -EFAULT;
 468
 469         return ret;
 470 }
 471
 472 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 473 {
 474         mm_segment_t old_fs = get_fs();
 475         int ret;
 476         loff_t lof;
 477         loff_t __user *up;
 478
 479         if (offset && get_user(lof, offset))
 480                 return -EFAULT;
 481
 482         /* The __user pointer cast is valid because of the set_fs() */
 483         set_fs(KERNEL_DS);
 484         up = offset ? (loff_t __user *) &lof : NULL;
 485         ret = sys_sendfile64(out_fd, in_fd, up, count);
 486         set_fs(old_fs);
 487
 488         if (offset && put_user(lof, offset))
 489                 return -EFAULT;
 490
 491         return ret;
 492 }
 493
 494 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 495                   unsigned long a3, unsigned long a4, unsigned long a5,
 496                   struct pt_regs *regs)
 497 {
 498         int error;
 499         char * filename;
 500
 501         filename = getname((char __user *) a0);
 502         error = PTR_ERR(filename);
 503         if (IS_ERR(filename))
 504                 goto out;
 505         flush_fp_to_thread(current);
 506         flush_altivec_to_thread(current);
 507
 508         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 509
 510         if (error == 0) {
 511                 task_lock(current);
 512                 current->ptrace &= ~PT_DTRACE;
 513                 task_unlock(current);
 514         }
 515         putname(filename);
 516
 517 out:
 518         return error;
 519 }
 520
 521 /* Note: it is necessary to treat option as an unsigned int,
 522  * with the corresponding cast to a signed int to insure that the
 523  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 524  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 525  */
 526 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 527 {
 528         return sys_prctl((int)option,
 529                          (unsigned long) arg2,
 530                          (unsigned long) arg3,
 531                          (unsigned long) arg4,
 532                          (unsigned long) arg5);
 533 }
 534
 535 /* Note: it is necessary to treat pid as an unsigned int,
 536  * with the corresponding cast to a signed int to insure that the
 537  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 538  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 539  */
 540 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 541 {
 542         struct timespec t;
 543         int ret;
 544         mm_segment_t old_fs = get_fs ();
 545
 546         /* The __user pointer cast is valid because of the set_fs() */
 547         set_fs (KERNEL_DS);
 548         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 549         set_fs (old_fs);
 550         if (put_compat_timespec(&t, interval))
 551                 return -EFAULT;
 552         return ret;
 553 }
 554
 555 /* Note: it is necessary to treat mode as an unsigned int,
 556  * with the corresponding cast to a signed int to insure that the
 557  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 558  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 559  */
 560 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 561 {
 562         return sys_access(filename, (int)mode);
 563 }
 564
 565
 566 /* Note: it is necessary to treat mode as an unsigned int,
 567  * with the corresponding cast to a signed int to insure that the
 568  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 569  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 570  */
 571 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 572 {
 573         return sys_creat(pathname, (int)mode);
 574 }
 575
 576
 577 /* Note: it is necessary to treat pid and options as unsigned ints,
 578  * with the corresponding cast to a signed int to insure that the
 579  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 580  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 581  */
 582 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 583 {
 584         return sys_waitpid((int)pid, stat_addr, (int)options);
 585 }
 586
 587
 588 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 589  * with the corresponding cast to a signed int to insure that the
 590  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 591  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 592  */
 593 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 594 {
 595         return sys_getgroups((int)gidsetsize, grouplist);
 596 }
 597
 598
 599 /* Note: it is necessary to treat pid as an unsigned int,
 600  * with the corresponding cast to a signed int to insure that the
 601  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 602  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 603  */
 604 asmlinkage long compat_sys_getpgid(u32 pid)
 605 {
 606         return sys_getpgid((int)pid);
 607 }
 608
 609
 610
 611 /* Note: it is necessary to treat pid as an unsigned int,
 612  * with the corresponding cast to a signed int to insure that the
 613  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 614  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 615  */
 616 asmlinkage long compat_sys_getsid(u32 pid)
 617 {
 618         return sys_getsid((int)pid);
 619 }
 620
 621
 622 /* Note: it is necessary to treat pid and sig as unsigned ints,
 623  * with the corresponding cast to a signed int to insure that the
 624  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 625  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 626  */
 627 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 628 {
 629         return sys_kill((int)pid, (int)sig);
 630 }
 631
 632
 633 /* Note: it is necessary to treat mode as an unsigned int,
 634  * with the corresponding cast to a signed int to insure that the
 635  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 636  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 637  */
 638 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 639 {
 640         return sys_mkdir(pathname, (int)mode);
 641 }
 642
 643 long compat_sys_nice(u32 increment)
 644 {
 645         /* sign extend increment */
 646         return sys_nice((int)increment);
 647 }
 648
 649 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 650 {
 651         /* sign extend n */
 652         return sys_lseek(fd, (int)offset, origin);
 653 }
 654
 655 /* Note: it is necessary to treat bufsiz as an unsigned int,
 656  * with the corresponding cast to a signed int to insure that the
 657  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 658  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 659  */
 660 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 661 {
 662         return sys_readlink(path, buf, (int)bufsiz);
 663 }
 664
 665 /* Note: it is necessary to treat option as an unsigned int,
 666  * with the corresponding cast to a signed int to insure that the
 667  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 668  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 669  */
 670 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 671 {
 672         return sys_sched_get_priority_max((int)policy);
 673 }
 674
 675
 676 /* Note: it is necessary to treat policy as an unsigned int,
 677  * with the corresponding cast to a signed int to insure that the
 678  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 679  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 680  */
 681 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 682 {
 683         return sys_sched_get_priority_min((int)policy);
 684 }
 685
 686
 687 /* Note: it is necessary to treat pid as an unsigned int,
 688  * with the corresponding cast to a signed int to insure that the
 689  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 690  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 691  */
 692 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 693 {
 694         return sys_sched_getparam((int)pid, param);
 695 }
 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 compat_sys_sched_getscheduler(u32 pid)
 704 {
 705         return sys_sched_getscheduler((int)pid);
 706 }
 707
 708
 709 /* Note: it is necessary to treat pid as an unsigned int,
 710  * with the corresponding cast to a signed int to insure that the
 711  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 712  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 713  */
 714 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 715 {
 716         return sys_sched_setparam((int)pid, param);
 717 }
 718
 719
 720 /* Note: it is necessary to treat pid and policy as unsigned ints,
 721  * with the corresponding cast to a signed int to insure that the
 722  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 723  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 724  */
 725 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 726 {
 727         return sys_sched_setscheduler((int)pid, (int)policy, param);
 728 }
 729
 730
 731 /* Note: it is necessary to treat len as an unsigned int,
 732  * with the corresponding cast to a signed int to insure that the
 733  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 734  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 735  */
 736 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 737 {
 738         return sys_setdomainname(name, (int)len);
 739 }
 740
 741
 742 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 743  * with the corresponding cast to a signed int to insure that the
 744  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 745  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 746  */
 747 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 748 {
 749         return sys_setgroups((int)gidsetsize, grouplist);
 750 }
 751
 752
 753 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 754 {
 755         /* sign extend len */
 756         return sys_sethostname(name, (int)len);
 757 }
 758
 759
 760 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 761  * with the corresponding cast to a signed int to insure that the
 762  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 763  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 764  */
 765 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 766 {
 767         return sys_setpgid((int)pid, (int)pgid);
 768 }
 769
 770 long compat_sys_getpriority(u32 which, u32 who)
 771 {
 772         /* sign extend which and who */
 773         return sys_getpriority((int)which, (int)who);
 774 }
 775
 776 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 777 {
 778         /* sign extend which, who and niceval */
 779         return sys_setpriority((int)which, (int)who, (int)niceval);
 780 }
 781
 782 long compat_sys_ioprio_get(u32 which, u32 who)
 783 {
 784         /* sign extend which and who */
 785         return sys_ioprio_get((int)which, (int)who);
 786 }
 787
 788 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 789 {
 790         /* sign extend which, who and ioprio */
 791         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 792 }
 793
 794 /* Note: it is necessary to treat newmask as an unsigned int,
 795  * with the corresponding cast to a signed int to insure that the
 796  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 797  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 798  */
 799 asmlinkage long compat_sys_ssetmask(u32 newmask)
 800 {
 801         return sys_ssetmask((int) newmask);
 802 }
 803
 804 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 805 {
 806         /* sign extend len */
 807         return sys_syslog(type, buf, (int)len);
 808 }
 809
 810
 811 /* Note: it is necessary to treat mask as an unsigned int,
 812  * with the corresponding cast to a signed int to insure that the
 813  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 814  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 815  */
 816 asmlinkage long compat_sys_umask(u32 mask)
 817 {
 818         return sys_umask((int)mask);
 819 }
 820
 821 #ifdef CONFIG_SYSCTL
 822 struct __sysctl_args32 {
 823         u32 name;
 824         int nlen;
 825         u32 oldval;
 826         u32 oldlenp;
 827         u32 newval;
 828         u32 newlen;
 829         u32 __unused[4];
 830 };
 831
 832 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 833 {
 834         struct __sysctl_args32 tmp;
 835         int error;
 836         size_t oldlen;
 837         size_t __user *oldlenp = NULL;
 838         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 839
 840         if (copy_from_user(&tmp, args, sizeof(tmp)))
 841                 return -EFAULT;
 842
 843         if (tmp.oldval && tmp.oldlenp) {
 844                 /* Duh, this is ugly and might not work if sysctl_args
 845                    is in read-only memory, but do_sysctl does indirectly
 846                    a lot of uaccess in both directions and we'd have to
 847                    basically copy the whole sysctl.c here, and
 848                    glibc's __sysctl uses rw memory for the structure
 849                    anyway.  */
 850                 oldlenp = (size_t __user *)addr;
 851                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 852                     put_user(oldlen, oldlenp))
 853                         return -EFAULT;
 854         }
 855
 856         lock_kernel();
 857         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 858                           compat_ptr(tmp.oldval), oldlenp,
 859                           compat_ptr(tmp.newval), tmp.newlen);
 860         unlock_kernel();
 861         if (oldlenp) {
 862                 if (!error) {
 863                         if (get_user(oldlen, oldlenp) ||
 864                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 865                                 error = -EFAULT;
 866                 }
 867                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 868         }
 869         return error;
 870 }
 871 #endif
 872
 873 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 874                           unsigned long prot, unsigned long flags,
 875                           unsigned long fd, unsigned long pgoff)
 876 {
 877         /* This should remain 12 even if PAGE_SIZE changes */
 878         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 879 }
 880
 881 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 882 {
 883         /* sign extend tgid, pid */
 884         return sys_tgkill((int)tgid, (int)pid, sig);
 885 }
 886
 887 /*
 888  * long long munging:
 889  * The 32 bit ABI passes long longs in an odd even register pair.
 890  */
 891
 892 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 893                              u32 reg6, u32 poshi, u32 poslo)
 894 {
 895         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 896 }
 897
 898 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 899                               u32 reg6, u32 poshi, u32 poslo)
 900 {
 901         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 902 }
 903
 904 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 905 {
 906         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 907 }
 908
 909 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 910                                 unsigned long high, unsigned long low)
 911 {
 912         return sys_truncate(path, (high << 32) | low);
 913 }
 914
 915 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 916                                  unsigned long low)
 917 {
 918         return sys_ftruncate(fd, (high << 32) | low);
 919 }
 920
 921 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 922                           size_t len)
 923 {
 924         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 925                                   buf, len);
 926 }
 927
 928 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 929                      size_t len, int advice)
 930 {
 931         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 932                              advice);
 933 }
 934
 935 asmlinkage long compat_sys_add_key(const char __user *_type,
 936                               const char __user *_description,
 937                               const void __user *_payload,
 938                               u32 plen,
 939                               u32 ringid)
 940 {
 941         return sys_add_key(_type, _description, _payload, plen, ringid);
 942 }
 943
 944 asmlinkage long compat_sys_request_key(const char __user *_type,
 945                                   const char __user *_description,
 946                                   const char __user *_callout_info,
 947                                   u32 destringid)
 948 {
 949         return sys_request_key(_type, _description, _callout_info, destringid);
 950 }
 951