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 extern int do_adjtimex(struct timex *);
 166
 167 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
 168 {
 169         struct timex txc;
 170         int ret;
 171
 172         memset(&txc, 0, sizeof(struct timex));
 173
 174         if(get_user(txc.modes, &utp->modes) ||
 175            __get_user(txc.offset, &utp->offset) ||
 176            __get_user(txc.freq, &utp->freq) ||
 177            __get_user(txc.maxerror, &utp->maxerror) ||
 178            __get_user(txc.esterror, &utp->esterror) ||
 179            __get_user(txc.status, &utp->status) ||
 180            __get_user(txc.constant, &utp->constant) ||
 181            __get_user(txc.precision, &utp->precision) ||
 182            __get_user(txc.tolerance, &utp->tolerance) ||
 183            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 184            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 185            __get_user(txc.tick, &utp->tick) ||
 186            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 187            __get_user(txc.jitter, &utp->jitter) ||
 188            __get_user(txc.shift, &utp->shift) ||
 189            __get_user(txc.stabil, &utp->stabil) ||
 190            __get_user(txc.jitcnt, &utp->jitcnt) ||
 191            __get_user(txc.calcnt, &utp->calcnt) ||
 192            __get_user(txc.errcnt, &utp->errcnt) ||
 193            __get_user(txc.stbcnt, &utp->stbcnt))
 194                 return -EFAULT;
 195
 196         ret = do_adjtimex(&txc);
 197
 198         if(put_user(txc.modes, &utp->modes) ||
 199            __put_user(txc.offset, &utp->offset) ||
 200            __put_user(txc.freq, &utp->freq) ||
 201            __put_user(txc.maxerror, &utp->maxerror) ||
 202            __put_user(txc.esterror, &utp->esterror) ||
 203            __put_user(txc.status, &utp->status) ||
 204            __put_user(txc.constant, &utp->constant) ||
 205            __put_user(txc.precision, &utp->precision) ||
 206            __put_user(txc.tolerance, &utp->tolerance) ||
 207            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 208            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 209            __put_user(txc.tick, &utp->tick) ||
 210            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 211            __put_user(txc.jitter, &utp->jitter) ||
 212            __put_user(txc.shift, &utp->shift) ||
 213            __put_user(txc.stabil, &utp->stabil) ||
 214            __put_user(txc.jitcnt, &utp->jitcnt) ||
 215            __put_user(txc.calcnt, &utp->calcnt) ||
 216            __put_user(txc.errcnt, &utp->errcnt) ||
 217            __put_user(txc.stbcnt, &utp->stbcnt))
 218                 ret = -EFAULT;
 219
 220         return ret;
 221 }
 222
 223 asmlinkage long compat_sys_pause(void)
 224 {
 225         current->state = TASK_INTERRUPTIBLE;
 226         schedule();
 227
 228         return -ERESTARTNOHAND;
 229 }
 230
 231 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 232 {
 233         long usec;
 234
 235         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 236                 return -EFAULT;
 237         if (__get_user(o->tv_sec, &i->tv_sec))
 238                 return -EFAULT;
 239         if (__get_user(usec, &i->tv_usec))
 240                 return -EFAULT;
 241         o->tv_nsec = usec * 1000;
 242         return 0;
 243 }
 244
 245 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 246 {
 247         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 248                 (__put_user(i->tv_sec, &o->tv_sec) |
 249                  __put_user(i->tv_usec, &o->tv_usec)));
 250 }
 251
 252 struct sysinfo32 {
 253         s32 uptime;
 254         u32 loads[3];
 255         u32 totalram;
 256         u32 freeram;
 257         u32 sharedram;
 258         u32 bufferram;
 259         u32 totalswap;
 260         u32 freeswap;
 261         unsigned short procs;
 262         unsigned short pad;
 263         u32 totalhigh;
 264         u32 freehigh;
 265         u32 mem_unit;
 266         char _f[20-2*sizeof(int)-sizeof(int)];
 267 };
 268
 269 asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
 270 {
 271         struct sysinfo s;
 272         int ret, err;
 273         int bitcount=0;
 274         mm_segment_t old_fs = get_fs ();
 275
 276         /* The __user cast is valid due to set_fs() */
 277         set_fs (KERNEL_DS);
 278         ret = sys_sysinfo((struct sysinfo __user *)&s);
 279         set_fs (old_fs);
 280
 281         /* Check to see if any memory value is too large for 32-bit and
 282          * scale down if needed.
 283          */
 284         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 285             while (s.mem_unit < PAGE_SIZE) {
 286                 s.mem_unit <<= 1;
 287                 bitcount++;
 288             }
 289             s.totalram >>=bitcount;
 290             s.freeram >>= bitcount;
 291             s.sharedram >>= bitcount;
 292             s.bufferram >>= bitcount;
 293             s.totalswap >>= bitcount;
 294             s.freeswap >>= bitcount;
 295             s.totalhigh >>= bitcount;
 296             s.freehigh >>= bitcount;
 297         }
 298
 299         err = put_user (s.uptime, &info->uptime);
 300         err |= __put_user (s.loads[0], &info->loads[0]);
 301         err |= __put_user (s.loads[1], &info->loads[1]);
 302         err |= __put_user (s.loads[2], &info->loads[2]);
 303         err |= __put_user (s.totalram, &info->totalram);
 304         err |= __put_user (s.freeram, &info->freeram);
 305         err |= __put_user (s.sharedram, &info->sharedram);
 306         err |= __put_user (s.bufferram, &info->bufferram);
 307         err |= __put_user (s.totalswap, &info->totalswap);
 308         err |= __put_user (s.freeswap, &info->freeswap);
 309         err |= __put_user (s.procs, &info->procs);
 310         err |= __put_user (s.totalhigh, &info->totalhigh);
 311         err |= __put_user (s.freehigh, &info->freehigh);
 312         err |= __put_user (s.mem_unit, &info->mem_unit);
 313         if (err)
 314                 return -EFAULT;
 315
 316         return ret;
 317 }
 318
 319
 320
 321
 322 /* Translations due to time_t size differences.  Which affects all
 323    sorts of things, like timeval and itimerval.  */
 324 extern struct timezone sys_tz;
 325
 326 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 327 {
 328         if (tv) {
 329                 struct timeval ktv;
 330                 do_gettimeofday(&ktv);
 331                 if (put_tv32(tv, &ktv))
 332                         return -EFAULT;
 333         }
 334         if (tz) {
 335                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 336                         return -EFAULT;
 337         }
 338
 339         return 0;
 340 }
 341
 342
 343
 344 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 345 {
 346         struct timespec kts;
 347         struct timezone ktz;
 348
 349         if (tv) {
 350                 if (get_ts32(&kts, tv))
 351                         return -EFAULT;
 352         }
 353         if (tz) {
 354                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 355                         return -EFAULT;
 356         }
 357
 358         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 359 }
 360
 361 #ifdef CONFIG_SYSVIPC
 362 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 363                u32 fifth)
 364 {
 365         int version;
 366
 367         version = call >> 16; /* hack for backward compatibility */
 368         call &= 0xffff;
 369
 370         switch (call) {
 371
 372         case SEMTIMEDOP:
 373                 if (fifth)
 374                         /* sign extend semid */
 375                         return compat_sys_semtimedop((int)first,
 376                                                      compat_ptr(ptr), second,
 377                                                      compat_ptr(fifth));
 378                 /* else fall through for normal semop() */
 379         case SEMOP:
 380                 /* struct sembuf is the same on 32 and 64bit :)) */
 381                 /* sign extend semid */
 382                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 383                                       NULL);
 384         case SEMGET:
 385                 /* sign extend key, nsems */
 386                 return sys_semget((int)first, (int)second, third);
 387         case SEMCTL:
 388                 /* sign extend semid, semnum */
 389                 return compat_sys_semctl((int)first, (int)second, third,
 390                                          compat_ptr(ptr));
 391
 392         case MSGSND:
 393                 /* sign extend msqid */
 394                 return compat_sys_msgsnd((int)first, (int)second, third,
 395                                          compat_ptr(ptr));
 396         case MSGRCV:
 397                 /* sign extend msqid, msgtyp */
 398                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 399                                          third, version, compat_ptr(ptr));
 400         case MSGGET:
 401                 /* sign extend key */
 402                 return sys_msgget((int)first, second);
 403         case MSGCTL:
 404                 /* sign extend msqid */
 405                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 406
 407         case SHMAT:
 408                 /* sign extend shmid */
 409                 return compat_sys_shmat((int)first, second, third, version,
 410                                         compat_ptr(ptr));
 411         case SHMDT:
 412                 return sys_shmdt(compat_ptr(ptr));
 413         case SHMGET:
 414                 /* sign extend key_t */
 415                 return sys_shmget((int)first, second, third);
 416         case SHMCTL:
 417                 /* sign extend shmid */
 418                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 419
 420         default:
 421                 return -ENOSYS;
 422         }
 423
 424         return -ENOSYS;
 425 }
 426 #endif
 427
 428 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 429  * with the corresponding cast to a signed int to insure that the
 430  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 431  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 432  */
 433 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 434 {
 435         mm_segment_t old_fs = get_fs();
 436         int ret;
 437         off_t of;
 438         off_t __user *up;
 439
 440         if (offset && get_user(of, offset))
 441                 return -EFAULT;
 442
 443         /* The __user pointer cast is valid because of the set_fs() */
 444         set_fs(KERNEL_DS);
 445         up = offset ? (off_t __user *) &of : NULL;
 446         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 447         set_fs(old_fs);
 448
 449         if (offset && put_user(of, offset))
 450                 return -EFAULT;
 451
 452         return ret;
 453 }
 454
 455 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 456 {
 457         mm_segment_t old_fs = get_fs();
 458         int ret;
 459         loff_t lof;
 460         loff_t __user *up;
 461
 462         if (offset && get_user(lof, offset))
 463                 return -EFAULT;
 464
 465         /* The __user pointer cast is valid because of the set_fs() */
 466         set_fs(KERNEL_DS);
 467         up = offset ? (loff_t __user *) &lof : NULL;
 468         ret = sys_sendfile64(out_fd, in_fd, up, count);
 469         set_fs(old_fs);
 470
 471         if (offset && put_user(lof, offset))
 472                 return -EFAULT;
 473
 474         return ret;
 475 }
 476
 477 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 478                   unsigned long a3, unsigned long a4, unsigned long a5,
 479                   struct pt_regs *regs)
 480 {
 481         int error;
 482         char * filename;
 483
 484         filename = getname((char __user *) a0);
 485         error = PTR_ERR(filename);
 486         if (IS_ERR(filename))
 487                 goto out;
 488         flush_fp_to_thread(current);
 489         flush_altivec_to_thread(current);
 490
 491         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 492
 493         if (error == 0) {
 494                 task_lock(current);
 495                 current->ptrace &= ~PT_DTRACE;
 496                 task_unlock(current);
 497         }
 498         putname(filename);
 499
 500 out:
 501         return error;
 502 }
 503
 504 /* Note: it is necessary to treat option as an unsigned int,
 505  * with the corresponding cast to a signed int to insure that the
 506  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 507  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 508  */
 509 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 510 {
 511         return sys_prctl((int)option,
 512                          (unsigned long) arg2,
 513                          (unsigned long) arg3,
 514                          (unsigned long) arg4,
 515                          (unsigned long) arg5);
 516 }
 517
 518 /* Note: it is necessary to treat pid as an unsigned int,
 519  * with the corresponding cast to a signed int to insure that the
 520  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 521  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 522  */
 523 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 524 {
 525         struct timespec t;
 526         int ret;
 527         mm_segment_t old_fs = get_fs ();
 528
 529         /* The __user pointer cast is valid because of the set_fs() */
 530         set_fs (KERNEL_DS);
 531         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 532         set_fs (old_fs);
 533         if (put_compat_timespec(&t, interval))
 534                 return -EFAULT;
 535         return ret;
 536 }
 537
 538 /* Note: it is necessary to treat mode as an unsigned int,
 539  * with the corresponding cast to a signed int to insure that the
 540  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 541  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 542  */
 543 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 544 {
 545         return sys_access(filename, (int)mode);
 546 }
 547
 548
 549 /* Note: it is necessary to treat mode as an unsigned int,
 550  * with the corresponding cast to a signed int to insure that the
 551  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 552  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 553  */
 554 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 555 {
 556         return sys_creat(pathname, (int)mode);
 557 }
 558
 559
 560 /* Note: it is necessary to treat pid and options as unsigned ints,
 561  * with the corresponding cast to a signed int to insure that the
 562  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 563  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 564  */
 565 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 566 {
 567         return sys_waitpid((int)pid, stat_addr, (int)options);
 568 }
 569
 570
 571 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 572  * with the corresponding cast to a signed int to insure that the
 573  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 574  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 575  */
 576 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 577 {
 578         return sys_getgroups((int)gidsetsize, grouplist);
 579 }
 580
 581
 582 /* Note: it is necessary to treat pid as an unsigned int,
 583  * with the corresponding cast to a signed int to insure that the
 584  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 585  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 586  */
 587 asmlinkage long compat_sys_getpgid(u32 pid)
 588 {
 589         return sys_getpgid((int)pid);
 590 }
 591
 592
 593
 594 /* Note: it is necessary to treat pid as an unsigned int,
 595  * with the corresponding cast to a signed int to insure that the
 596  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 597  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 598  */
 599 asmlinkage long compat_sys_getsid(u32 pid)
 600 {
 601         return sys_getsid((int)pid);
 602 }
 603
 604
 605 /* Note: it is necessary to treat pid and sig as unsigned ints,
 606  * with the corresponding cast to a signed int to insure that the
 607  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 608  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 609  */
 610 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 611 {
 612         return sys_kill((int)pid, (int)sig);
 613 }
 614
 615
 616 /* Note: it is necessary to treat mode as an unsigned int,
 617  * with the corresponding cast to a signed int to insure that the
 618  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 619  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 620  */
 621 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 622 {
 623         return sys_mkdir(pathname, (int)mode);
 624 }
 625
 626 long compat_sys_nice(u32 increment)
 627 {
 628         /* sign extend increment */
 629         return sys_nice((int)increment);
 630 }
 631
 632 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 633 {
 634         /* sign extend n */
 635         return sys_lseek(fd, (int)offset, origin);
 636 }
 637
 638 /* Note: it is necessary to treat bufsiz as an unsigned int,
 639  * with the corresponding cast to a signed int to insure that the
 640  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 641  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 642  */
 643 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 644 {
 645         return sys_readlink(path, buf, (int)bufsiz);
 646 }
 647
 648 /* Note: it is necessary to treat option as an unsigned int,
 649  * with the corresponding cast to a signed int to insure that the
 650  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 651  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 652  */
 653 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 654 {
 655         return sys_sched_get_priority_max((int)policy);
 656 }
 657
 658
 659 /* Note: it is necessary to treat policy 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 compat_sys_sched_get_priority_min(u32 policy)
 665 {
 666         return sys_sched_get_priority_min((int)policy);
 667 }
 668
 669
 670 /* Note: it is necessary to treat pid as an unsigned int,
 671  * with the corresponding cast to a signed int to insure that the
 672  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 673  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 674  */
 675 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 676 {
 677         return sys_sched_getparam((int)pid, param);
 678 }
 679
 680
 681 /* Note: it is necessary to treat pid as an unsigned int,
 682  * with the corresponding cast to a signed int to insure that the
 683  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 684  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 685  */
 686 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 687 {
 688         return sys_sched_getscheduler((int)pid);
 689 }
 690
 691
 692 /* Note: it is necessary to treat pid as an unsigned int,
 693  * with the corresponding cast to a signed int to insure that the
 694  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 695  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 696  */
 697 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 698 {
 699         return sys_sched_setparam((int)pid, param);
 700 }
 701
 702
 703 /* Note: it is necessary to treat pid and policy as unsigned ints,
 704  * with the corresponding cast to a signed int to insure that the
 705  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 706  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 707  */
 708 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 709 {
 710         return sys_sched_setscheduler((int)pid, (int)policy, param);
 711 }
 712
 713
 714 /* Note: it is necessary to treat len as an unsigned int,
 715  * with the corresponding cast to a signed int to insure that the
 716  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 717  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 718  */
 719 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 720 {
 721         return sys_setdomainname(name, (int)len);
 722 }
 723
 724
 725 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 726  * with the corresponding cast to a signed int to insure that the
 727  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 728  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 729  */
 730 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 731 {
 732         return sys_setgroups((int)gidsetsize, grouplist);
 733 }
 734
 735
 736 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 737 {
 738         /* sign extend len */
 739         return sys_sethostname(name, (int)len);
 740 }
 741
 742
 743 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 744  * with the corresponding cast to a signed int to insure that the
 745  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 746  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 747  */
 748 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 749 {
 750         return sys_setpgid((int)pid, (int)pgid);
 751 }
 752
 753 long compat_sys_getpriority(u32 which, u32 who)
 754 {
 755         /* sign extend which and who */
 756         return sys_getpriority((int)which, (int)who);
 757 }
 758
 759 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 760 {
 761         /* sign extend which, who and niceval */
 762         return sys_setpriority((int)which, (int)who, (int)niceval);
 763 }
 764
 765 long compat_sys_ioprio_get(u32 which, u32 who)
 766 {
 767         /* sign extend which and who */
 768         return sys_ioprio_get((int)which, (int)who);
 769 }
 770
 771 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 772 {
 773         /* sign extend which, who and ioprio */
 774         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 775 }
 776
 777 /* Note: it is necessary to treat newmask as an unsigned int,
 778  * with the corresponding cast to a signed int to insure that the
 779  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 780  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 781  */
 782 asmlinkage long compat_sys_ssetmask(u32 newmask)
 783 {
 784         return sys_ssetmask((int) newmask);
 785 }
 786
 787 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 788 {
 789         /* sign extend len */
 790         return sys_syslog(type, buf, (int)len);
 791 }
 792
 793
 794 /* Note: it is necessary to treat mask 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_umask(u32 mask)
 800 {
 801         return sys_umask((int)mask);
 802 }
 803
 804 #ifdef CONFIG_SYSCTL
 805 struct __sysctl_args32 {
 806         u32 name;
 807         int nlen;
 808         u32 oldval;
 809         u32 oldlenp;
 810         u32 newval;
 811         u32 newlen;
 812         u32 __unused[4];
 813 };
 814
 815 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 816 {
 817         struct __sysctl_args32 tmp;
 818         int error;
 819         size_t oldlen;
 820         size_t __user *oldlenp = NULL;
 821         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 822
 823         if (copy_from_user(&tmp, args, sizeof(tmp)))
 824                 return -EFAULT;
 825
 826         if (tmp.oldval && tmp.oldlenp) {
 827                 /* Duh, this is ugly and might not work if sysctl_args
 828                    is in read-only memory, but do_sysctl does indirectly
 829                    a lot of uaccess in both directions and we'd have to
 830                    basically copy the whole sysctl.c here, and
 831                    glibc's __sysctl uses rw memory for the structure
 832                    anyway.  */
 833                 oldlenp = (size_t __user *)addr;
 834                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 835                     put_user(oldlen, oldlenp))
 836                         return -EFAULT;
 837         }
 838
 839         lock_kernel();
 840         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 841                           compat_ptr(tmp.oldval), oldlenp,
 842                           compat_ptr(tmp.newval), tmp.newlen);
 843         unlock_kernel();
 844         if (oldlenp) {
 845                 if (!error) {
 846                         if (get_user(oldlen, oldlenp) ||
 847                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 848                                 error = -EFAULT;
 849                 }
 850                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 851         }
 852         return error;
 853 }
 854 #endif
 855
 856 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 857                           unsigned long prot, unsigned long flags,
 858                           unsigned long fd, unsigned long pgoff)
 859 {
 860         /* This should remain 12 even if PAGE_SIZE changes */
 861         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 862 }
 863
 864 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 865 {
 866         /* sign extend tgid, pid */
 867         return sys_tgkill((int)tgid, (int)pid, sig);
 868 }
 869
 870 /*
 871  * long long munging:
 872  * The 32 bit ABI passes long longs in an odd even register pair.
 873  */
 874
 875 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 876                              u32 reg6, u32 poshi, u32 poslo)
 877 {
 878         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 879 }
 880
 881 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 882                               u32 reg6, u32 poshi, u32 poslo)
 883 {
 884         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 885 }
 886
 887 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 888 {
 889         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 890 }
 891
 892 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 893                                 unsigned long high, unsigned long low)
 894 {
 895         return sys_truncate(path, (high << 32) | low);
 896 }
 897
 898 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 899                                  unsigned long low)
 900 {
 901         return sys_ftruncate(fd, (high << 32) | low);
 902 }
 903
 904 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 905                           size_t len)
 906 {
 907         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 908                                   buf, len);
 909 }
 910
 911 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 912                      size_t len, int advice)
 913 {
 914         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 915                              advice);
 916 }
 917
 918 asmlinkage long compat_sys_add_key(const char __user *_type,
 919                               const char __user *_description,
 920                               const void __user *_payload,
 921                               u32 plen,
 922                               u32 ringid)
 923 {
 924         return sys_add_key(_type, _description, _payload, plen, ringid);
 925 }
 926
 927 asmlinkage long compat_sys_request_key(const char __user *_type,
 928                                   const char __user *_description,
 929                                   const char __user *_callout_info,
 930                                   u32 destringid)
 931 {
 932         return sys_request_key(_type, _description, _callout_info, destringid);
 933 }
 934