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/kernel.h>
  18 #include <linux/sched.h>
  19 #include <linux/fs.h>
  20 #include <linux/mm.h>
  21 #include <linux/file.h>
  22 #include <linux/signal.h>
  23 #include <linux/resource.h>
  24 #include <linux/times.h>
  25 #include <linux/utsname.h>
  26 #include <linux/smp.h>
  27 #include <linux/smp_lock.h>
  28 #include <linux/sem.h>
  29 #include <linux/msg.h>
  30 #include <linux/shm.h>
  31 #include <linux/poll.h>
  32 #include <linux/personality.h>
  33 #include <linux/stat.h>
  34 #include <linux/mman.h>
  35 #include <linux/in.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/unistd.h>
  38 #include <linux/sysctl.h>
  39 #include <linux/binfmts.h>
  40 #include <linux/security.h>
  41 #include <linux/compat.h>
  42 #include <linux/ptrace.h>
  43 #include <linux/elf.h>
  44 #include <linux/ipc.h>
  45
  46 #include <asm/ptrace.h>
  47 #include <asm/types.h>
  48 #include <asm/uaccess.h>
  49 #include <asm/unistd.h>
  50 #include <asm/time.h>
  51 #include <asm/mmu_context.h>
  52 #include <asm/ppc-pci.h>
  53 #include <asm/syscalls.h>
  54
  55
  56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
  57                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
  58                 compat_uptr_t tvp_x)
  59 {
  60         /* sign extend n */
  61         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
  62 }
  63
  64 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
  65 {
  66         compat_ino_t ino;
  67         long err;
  68
  69         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
  70             !new_valid_dev(stat->rdev))
  71                 return -EOVERFLOW;
  72
  73         ino = stat->ino;
  74         if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
  75                 return -EOVERFLOW;
  76
  77         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
  78         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
  79         err |= __put_user(ino, &statbuf->st_ino);
  80         err |= __put_user(stat->mode, &statbuf->st_mode);
  81         err |= __put_user(stat->nlink, &statbuf->st_nlink);
  82         err |= __put_user(stat->uid, &statbuf->st_uid);
  83         err |= __put_user(stat->gid, &statbuf->st_gid);
  84         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
  85         err |= __put_user(stat->size, &statbuf->st_size);
  86         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
  87         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
  88         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
  89         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
  90         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
  91         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
  92         err |= __put_user(stat->blksize, &statbuf->st_blksize);
  93         err |= __put_user(stat->blocks, &statbuf->st_blocks);
  94         err |= __put_user(0, &statbuf->__unused4[0]);
  95         err |= __put_user(0, &statbuf->__unused4[1]);
  96
  97         return err;
  98 }
  99
 100 /* Note: it is necessary to treat option as an unsigned int,
 101  * with the corresponding cast to a signed int to insure that the
 102  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 103  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 104  */
 105 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 106 {
 107         return sys_sysfs((int)option, arg1, arg2);
 108 }
 109
 110 asmlinkage long compat_sys_pause(void)
 111 {
 112         current->state = TASK_INTERRUPTIBLE;
 113         schedule();
 114
 115         return -ERESTARTNOHAND;
 116 }
 117
 118 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 119 {
 120         long usec;
 121
 122         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 123                 return -EFAULT;
 124         if (__get_user(o->tv_sec, &i->tv_sec))
 125                 return -EFAULT;
 126         if (__get_user(usec, &i->tv_usec))
 127                 return -EFAULT;
 128         o->tv_nsec = usec * 1000;
 129         return 0;
 130 }
 131
 132 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 133 {
 134         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 135                 (__put_user(i->tv_sec, &o->tv_sec) |
 136                  __put_user(i->tv_usec, &o->tv_usec)));
 137 }
 138
 139
 140
 141
 142 /* Translations due to time_t size differences.  Which affects all
 143    sorts of things, like timeval and itimerval.  */
 144 extern struct timezone sys_tz;
 145
 146 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 147 {
 148         if (tv) {
 149                 struct timeval ktv;
 150                 do_gettimeofday(&ktv);
 151                 if (put_tv32(tv, &ktv))
 152                         return -EFAULT;
 153         }
 154         if (tz) {
 155                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 156                         return -EFAULT;
 157         }
 158
 159         return 0;
 160 }
 161
 162
 163
 164 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 165 {
 166         struct timespec kts;
 167         struct timezone ktz;
 168
 169         if (tv) {
 170                 if (get_ts32(&kts, tv))
 171                         return -EFAULT;
 172         }
 173         if (tz) {
 174                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 175                         return -EFAULT;
 176         }
 177
 178         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 179 }
 180
 181 #ifdef CONFIG_SYSVIPC
 182 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 183                u32 fifth)
 184 {
 185         int version;
 186
 187         version = call >> 16; /* hack for backward compatibility */
 188         call &= 0xffff;
 189
 190         switch (call) {
 191
 192         case SEMTIMEDOP:
 193                 if (fifth)
 194                         /* sign extend semid */
 195                         return compat_sys_semtimedop((int)first,
 196                                                      compat_ptr(ptr), second,
 197                                                      compat_ptr(fifth));
 198                 /* else fall through for normal semop() */
 199         case SEMOP:
 200                 /* struct sembuf is the same on 32 and 64bit :)) */
 201                 /* sign extend semid */
 202                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 203                                       NULL);
 204         case SEMGET:
 205                 /* sign extend key, nsems */
 206                 return sys_semget((int)first, (int)second, third);
 207         case SEMCTL:
 208                 /* sign extend semid, semnum */
 209                 return compat_sys_semctl((int)first, (int)second, third,
 210                                          compat_ptr(ptr));
 211
 212         case MSGSND:
 213                 /* sign extend msqid */
 214                 return compat_sys_msgsnd((int)first, (int)second, third,
 215                                          compat_ptr(ptr));
 216         case MSGRCV:
 217                 /* sign extend msqid, msgtyp */
 218                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 219                                          third, version, compat_ptr(ptr));
 220         case MSGGET:
 221                 /* sign extend key */
 222                 return sys_msgget((int)first, second);
 223         case MSGCTL:
 224                 /* sign extend msqid */
 225                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 226
 227         case SHMAT:
 228                 /* sign extend shmid */
 229                 return compat_sys_shmat((int)first, second, third, version,
 230                                         compat_ptr(ptr));
 231         case SHMDT:
 232                 return sys_shmdt(compat_ptr(ptr));
 233         case SHMGET:
 234                 /* sign extend key_t */
 235                 return sys_shmget((int)first, second, third);
 236         case SHMCTL:
 237                 /* sign extend shmid */
 238                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 239
 240         default:
 241                 return -ENOSYS;
 242         }
 243
 244         return -ENOSYS;
 245 }
 246 #endif
 247
 248 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 249  * with the corresponding cast to a signed int to insure that the
 250  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 251  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 252  */
 253 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 254 {
 255         mm_segment_t old_fs = get_fs();
 256         int ret;
 257         off_t of;
 258         off_t __user *up;
 259
 260         if (offset && get_user(of, offset))
 261                 return -EFAULT;
 262
 263         /* The __user pointer cast is valid because of the set_fs() */
 264         set_fs(KERNEL_DS);
 265         up = offset ? (off_t __user *) &of : NULL;
 266         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 267         set_fs(old_fs);
 268
 269         if (offset && put_user(of, offset))
 270                 return -EFAULT;
 271
 272         return ret;
 273 }
 274
 275 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 276 {
 277         mm_segment_t old_fs = get_fs();
 278         int ret;
 279         loff_t lof;
 280         loff_t __user *up;
 281
 282         if (offset && get_user(lof, offset))
 283                 return -EFAULT;
 284
 285         /* The __user pointer cast is valid because of the set_fs() */
 286         set_fs(KERNEL_DS);
 287         up = offset ? (loff_t __user *) &lof : NULL;
 288         ret = sys_sendfile64(out_fd, in_fd, up, count);
 289         set_fs(old_fs);
 290
 291         if (offset && put_user(lof, offset))
 292                 return -EFAULT;
 293
 294         return ret;
 295 }
 296
 297 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 298                   unsigned long a3, unsigned long a4, unsigned long a5,
 299                   struct pt_regs *regs)
 300 {
 301         int error;
 302         char * filename;
 303
 304         filename = getname((char __user *) a0);
 305         error = PTR_ERR(filename);
 306         if (IS_ERR(filename))
 307                 goto out;
 308         flush_fp_to_thread(current);
 309         flush_altivec_to_thread(current);
 310
 311         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 312
 313         putname(filename);
 314
 315 out:
 316         return error;
 317 }
 318
 319 /* Note: it is necessary to treat option as an unsigned int,
 320  * with the corresponding cast to a signed int to insure that the
 321  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 322  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 323  */
 324 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 325 {
 326         return sys_prctl((int)option,
 327                          (unsigned long) arg2,
 328                          (unsigned long) arg3,
 329                          (unsigned long) arg4,
 330                          (unsigned long) arg5);
 331 }
 332
 333 /* Note: it is necessary to treat pid as an unsigned int,
 334  * with the corresponding cast to a signed int to insure that the
 335  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 336  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 337  */
 338 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 339 {
 340         struct timespec t;
 341         int ret;
 342         mm_segment_t old_fs = get_fs ();
 343
 344         /* The __user pointer cast is valid because of the set_fs() */
 345         set_fs (KERNEL_DS);
 346         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 347         set_fs (old_fs);
 348         if (put_compat_timespec(&t, interval))
 349                 return -EFAULT;
 350         return ret;
 351 }
 352
 353 /* Note: it is necessary to treat mode as an unsigned int,
 354  * with the corresponding cast to a signed int to insure that the
 355  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 356  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 357  */
 358 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 359 {
 360         return sys_access(filename, (int)mode);
 361 }
 362
 363
 364 /* Note: it is necessary to treat mode as an unsigned int,
 365  * with the corresponding cast to a signed int to insure that the
 366  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 367  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 368  */
 369 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 370 {
 371         return sys_creat(pathname, (int)mode);
 372 }
 373
 374
 375 /* Note: it is necessary to treat pid and options as unsigned ints,
 376  * with the corresponding cast to a signed int to insure that the
 377  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 378  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 379  */
 380 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 381 {
 382         return sys_waitpid((int)pid, stat_addr, (int)options);
 383 }
 384
 385
 386 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 387  * with the corresponding cast to a signed int to insure that the
 388  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 389  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 390  */
 391 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 392 {
 393         return sys_getgroups((int)gidsetsize, grouplist);
 394 }
 395
 396
 397 /* Note: it is necessary to treat pid as an unsigned int,
 398  * with the corresponding cast to a signed int to insure that the
 399  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 400  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 401  */
 402 asmlinkage long compat_sys_getpgid(u32 pid)
 403 {
 404         return sys_getpgid((int)pid);
 405 }
 406
 407
 408
 409 /* Note: it is necessary to treat pid as an unsigned int,
 410  * with the corresponding cast to a signed int to insure that the
 411  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 412  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 413  */
 414 asmlinkage long compat_sys_getsid(u32 pid)
 415 {
 416         return sys_getsid((int)pid);
 417 }
 418
 419
 420 /* Note: it is necessary to treat pid and sig as unsigned ints,
 421  * with the corresponding cast to a signed int to insure that the
 422  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 423  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 424  */
 425 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 426 {
 427         return sys_kill((int)pid, (int)sig);
 428 }
 429
 430
 431 /* Note: it is necessary to treat mode as an unsigned int,
 432  * with the corresponding cast to a signed int to insure that the
 433  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 434  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 435  */
 436 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 437 {
 438         return sys_mkdir(pathname, (int)mode);
 439 }
 440
 441 long compat_sys_nice(u32 increment)
 442 {
 443         /* sign extend increment */
 444         return sys_nice((int)increment);
 445 }
 446
 447 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 448 {
 449         /* sign extend n */
 450         return sys_lseek(fd, (int)offset, origin);
 451 }
 452
 453 /* Note: it is necessary to treat bufsiz as an unsigned int,
 454  * with the corresponding cast to a signed int to insure that the
 455  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 456  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 457  */
 458 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 459 {
 460         return sys_readlink(path, buf, (int)bufsiz);
 461 }
 462
 463 /* Note: it is necessary to treat option as an unsigned int,
 464  * with the corresponding cast to a signed int to insure that the
 465  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 466  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 467  */
 468 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 469 {
 470         return sys_sched_get_priority_max((int)policy);
 471 }
 472
 473
 474 /* Note: it is necessary to treat policy as an unsigned int,
 475  * with the corresponding cast to a signed int to insure that the
 476  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 477  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 478  */
 479 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 480 {
 481         return sys_sched_get_priority_min((int)policy);
 482 }
 483
 484
 485 /* Note: it is necessary to treat pid as an unsigned int,
 486  * with the corresponding cast to a signed int to insure that the
 487  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 488  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 489  */
 490 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 491 {
 492         return sys_sched_getparam((int)pid, param);
 493 }
 494
 495
 496 /* Note: it is necessary to treat pid as an unsigned int,
 497  * with the corresponding cast to a signed int to insure that the
 498  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 499  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 500  */
 501 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 502 {
 503         return sys_sched_getscheduler((int)pid);
 504 }
 505
 506
 507 /* Note: it is necessary to treat pid as an unsigned int,
 508  * with the corresponding cast to a signed int to insure that the
 509  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 510  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 511  */
 512 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 513 {
 514         return sys_sched_setparam((int)pid, param);
 515 }
 516
 517
 518 /* Note: it is necessary to treat pid and policy as unsigned ints,
 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_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 524 {
 525         return sys_sched_setscheduler((int)pid, (int)policy, param);
 526 }
 527
 528
 529 /* Note: it is necessary to treat len as an unsigned int,
 530  * with the corresponding cast to a signed int to insure that the
 531  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 532  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 533  */
 534 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 535 {
 536         return sys_setdomainname(name, (int)len);
 537 }
 538
 539
 540 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 541  * with the corresponding cast to a signed int to insure that the
 542  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 543  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 544  */
 545 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 546 {
 547         return sys_setgroups((int)gidsetsize, grouplist);
 548 }
 549
 550
 551 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 552 {
 553         /* sign extend len */
 554         return sys_sethostname(name, (int)len);
 555 }
 556
 557
 558 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 559  * with the corresponding cast to a signed int to insure that the
 560  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 561  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 562  */
 563 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 564 {
 565         return sys_setpgid((int)pid, (int)pgid);
 566 }
 567
 568 long compat_sys_getpriority(u32 which, u32 who)
 569 {
 570         /* sign extend which and who */
 571         return sys_getpriority((int)which, (int)who);
 572 }
 573
 574 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 575 {
 576         /* sign extend which, who and niceval */
 577         return sys_setpriority((int)which, (int)who, (int)niceval);
 578 }
 579
 580 long compat_sys_ioprio_get(u32 which, u32 who)
 581 {
 582         /* sign extend which and who */
 583         return sys_ioprio_get((int)which, (int)who);
 584 }
 585
 586 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 587 {
 588         /* sign extend which, who and ioprio */
 589         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 590 }
 591
 592 /* Note: it is necessary to treat newmask as an unsigned int,
 593  * with the corresponding cast to a signed int to insure that the
 594  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 595  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 596  */
 597 asmlinkage long compat_sys_ssetmask(u32 newmask)
 598 {
 599         return sys_ssetmask((int) newmask);
 600 }
 601
 602 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 603 {
 604         /* sign extend len */
 605         return sys_syslog(type, buf, (int)len);
 606 }
 607
 608
 609 /* Note: it is necessary to treat mask as an unsigned int,
 610  * with the corresponding cast to a signed int to insure that the
 611  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 612  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 613  */
 614 asmlinkage long compat_sys_umask(u32 mask)
 615 {
 616         return sys_umask((int)mask);
 617 }
 618
 619 #ifdef CONFIG_SYSCTL_SYSCALL
 620 struct __sysctl_args32 {
 621         u32 name;
 622         int nlen;
 623         u32 oldval;
 624         u32 oldlenp;
 625         u32 newval;
 626         u32 newlen;
 627         u32 __unused[4];
 628 };
 629
 630 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 631 {
 632         struct __sysctl_args32 tmp;
 633         int error;
 634         size_t oldlen;
 635         size_t __user *oldlenp = NULL;
 636         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 637
 638         if (copy_from_user(&tmp, args, sizeof(tmp)))
 639                 return -EFAULT;
 640
 641         if (tmp.oldval && tmp.oldlenp) {
 642                 /* Duh, this is ugly and might not work if sysctl_args
 643                    is in read-only memory, but do_sysctl does indirectly
 644                    a lot of uaccess in both directions and we'd have to
 645                    basically copy the whole sysctl.c here, and
 646                    glibc's __sysctl uses rw memory for the structure
 647                    anyway.  */
 648                 oldlenp = (size_t __user *)addr;
 649                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 650                     put_user(oldlen, oldlenp))
 651                         return -EFAULT;
 652         }
 653
 654         lock_kernel();
 655         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 656                           compat_ptr(tmp.oldval), oldlenp,
 657                           compat_ptr(tmp.newval), tmp.newlen);
 658         unlock_kernel();
 659         if (oldlenp) {
 660                 if (!error) {
 661                         if (get_user(oldlen, oldlenp) ||
 662                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 663                                 error = -EFAULT;
 664                 }
 665                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 666         }
 667         return error;
 668 }
 669 #endif
 670
 671 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 672                           unsigned long prot, unsigned long flags,
 673                           unsigned long fd, unsigned long pgoff)
 674 {
 675         /* This should remain 12 even if PAGE_SIZE changes */
 676         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 677 }
 678
 679 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 680 {
 681         /* sign extend tgid, pid */
 682         return sys_tgkill((int)tgid, (int)pid, sig);
 683 }
 684
 685 /*
 686  * long long munging:
 687  * The 32 bit ABI passes long longs in an odd even register pair.
 688  */
 689
 690 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 691                              u32 reg6, u32 poshi, u32 poslo)
 692 {
 693         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 694 }
 695
 696 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 697                               u32 reg6, u32 poshi, u32 poslo)
 698 {
 699         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 700 }
 701
 702 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 703 {
 704         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 705 }
 706
 707 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 708                                 unsigned long high, unsigned long low)
 709 {
 710         return sys_truncate(path, (high << 32) | low);
 711 }
 712
 713 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 714                                      u32 lenhi, u32 lenlo)
 715 {
 716         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 717                              ((loff_t)lenhi << 32) | lenlo);
 718 }
 719
 720 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 721                                  unsigned long low)
 722 {
 723         return sys_ftruncate(fd, (high << 32) | low);
 724 }
 725
 726 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 727                           size_t len)
 728 {
 729         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 730                                   buf, len);
 731 }
 732
 733 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 734                      size_t len, int advice)
 735 {
 736         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 737                              advice);
 738 }
 739
 740 asmlinkage long compat_sys_add_key(const char __user *_type,
 741                               const char __user *_description,
 742                               const void __user *_payload,
 743                               u32 plen,
 744                               u32 ringid)
 745 {
 746         return sys_add_key(_type, _description, _payload, plen, ringid);
 747 }
 748
 749 asmlinkage long compat_sys_request_key(const char __user *_type,
 750                                   const char __user *_description,
 751                                   const char __user *_callout_info,
 752                                   u32 destringid)
 753 {
 754         return sys_request_key(_type, _description, _callout_info, destringid);
 755 }
 756
 757 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 758                                    unsigned offset_hi, unsigned offset_lo,
 759                                    unsigned nbytes_hi, unsigned nbytes_lo)
 760 {
 761         loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 762         loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 763
 764         return sys_sync_file_range(fd, offset, nbytes, flags);
 765 }