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 struct old_linux_dirent32 {
  56         u32             d_ino;
  57         u32             d_offset;
  58         unsigned short  d_namlen;
  59         char            d_name[1];
  60 };
  61
  62 struct readdir_callback32 {
  63         struct old_linux_dirent32 __user * dirent;
  64         int count;
  65 };
  66
  67 static int fillonedir(void * __buf, const char * name, int namlen,
  68                                   off_t offset, u64 ino, unsigned int d_type)
  69 {
  70         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  71         struct old_linux_dirent32 __user * dirent;
  72         ino_t d_ino;
  73
  74         if (buf->count)
  75                 return -EINVAL;
  76         d_ino = ino;
  77         if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
  78                 return -EOVERFLOW;
  79         buf->count++;
  80         dirent = buf->dirent;
  81         put_user(d_ino, &dirent->d_ino);
  82         put_user(offset, &dirent->d_offset);
  83         put_user(namlen, &dirent->d_namlen);
  84         copy_to_user(dirent->d_name, name, namlen);
  85         put_user(0, dirent->d_name + namlen);
  86         return 0;
  87 }
  88
  89 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  90 {
  91         int error = -EBADF;
  92         struct file * file;
  93         struct readdir_callback32 buf;
  94
  95         file = fget(fd);
  96         if (!file)
  97                 goto out;
  98
  99         buf.count = 0;
 100         buf.dirent = dirent;
 101
 102         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 103         if (error < 0)
 104                 goto out_putf;
 105         error = buf.count;
 106
 107 out_putf:
 108         fput(file);
 109 out:
 110         return error;
 111 }
 112
 113 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 114                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 115                 compat_uptr_t tvp_x)
 116 {
 117         /* sign extend n */
 118         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 119 }
 120
 121 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 122 {
 123         compat_ino_t ino;
 124         long err;
 125
 126         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 127             !new_valid_dev(stat->rdev))
 128                 return -EOVERFLOW;
 129
 130         ino = stat->ino;
 131         if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
 132                 return -EOVERFLOW;
 133
 134         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 135         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 136         err |= __put_user(ino, &statbuf->st_ino);
 137         err |= __put_user(stat->mode, &statbuf->st_mode);
 138         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 139         err |= __put_user(stat->uid, &statbuf->st_uid);
 140         err |= __put_user(stat->gid, &statbuf->st_gid);
 141         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 142         err |= __put_user(stat->size, &statbuf->st_size);
 143         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 144         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 145         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 146         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 147         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 148         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 149         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 150         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 151         err |= __put_user(0, &statbuf->__unused4[0]);
 152         err |= __put_user(0, &statbuf->__unused4[1]);
 153
 154         return err;
 155 }
 156
 157 /* Note: it is necessary to treat option as an unsigned int,
 158  * with the corresponding cast to a signed int to insure that the
 159  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 160  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 161  */
 162 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 163 {
 164         return sys_sysfs((int)option, arg1, arg2);
 165 }
 166
 167 asmlinkage long compat_sys_pause(void)
 168 {
 169         current->state = TASK_INTERRUPTIBLE;
 170         schedule();
 171
 172         return -ERESTARTNOHAND;
 173 }
 174
 175 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 176 {
 177         long usec;
 178
 179         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 180                 return -EFAULT;
 181         if (__get_user(o->tv_sec, &i->tv_sec))
 182                 return -EFAULT;
 183         if (__get_user(usec, &i->tv_usec))
 184                 return -EFAULT;
 185         o->tv_nsec = usec * 1000;
 186         return 0;
 187 }
 188
 189 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 190 {
 191         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 192                 (__put_user(i->tv_sec, &o->tv_sec) |
 193                  __put_user(i->tv_usec, &o->tv_usec)));
 194 }
 195
 196
 197
 198
 199 /* Translations due to time_t size differences.  Which affects all
 200    sorts of things, like timeval and itimerval.  */
 201 extern struct timezone sys_tz;
 202
 203 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 204 {
 205         if (tv) {
 206                 struct timeval ktv;
 207                 do_gettimeofday(&ktv);
 208                 if (put_tv32(tv, &ktv))
 209                         return -EFAULT;
 210         }
 211         if (tz) {
 212                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 213                         return -EFAULT;
 214         }
 215
 216         return 0;
 217 }
 218
 219
 220
 221 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 222 {
 223         struct timespec kts;
 224         struct timezone ktz;
 225
 226         if (tv) {
 227                 if (get_ts32(&kts, tv))
 228                         return -EFAULT;
 229         }
 230         if (tz) {
 231                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 232                         return -EFAULT;
 233         }
 234
 235         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 236 }
 237
 238 #ifdef CONFIG_SYSVIPC
 239 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 240                u32 fifth)
 241 {
 242         int version;
 243
 244         version = call >> 16; /* hack for backward compatibility */
 245         call &= 0xffff;
 246
 247         switch (call) {
 248
 249         case SEMTIMEDOP:
 250                 if (fifth)
 251                         /* sign extend semid */
 252                         return compat_sys_semtimedop((int)first,
 253                                                      compat_ptr(ptr), second,
 254                                                      compat_ptr(fifth));
 255                 /* else fall through for normal semop() */
 256         case SEMOP:
 257                 /* struct sembuf is the same on 32 and 64bit :)) */
 258                 /* sign extend semid */
 259                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 260                                       NULL);
 261         case SEMGET:
 262                 /* sign extend key, nsems */
 263                 return sys_semget((int)first, (int)second, third);
 264         case SEMCTL:
 265                 /* sign extend semid, semnum */
 266                 return compat_sys_semctl((int)first, (int)second, third,
 267                                          compat_ptr(ptr));
 268
 269         case MSGSND:
 270                 /* sign extend msqid */
 271                 return compat_sys_msgsnd((int)first, (int)second, third,
 272                                          compat_ptr(ptr));
 273         case MSGRCV:
 274                 /* sign extend msqid, msgtyp */
 275                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 276                                          third, version, compat_ptr(ptr));
 277         case MSGGET:
 278                 /* sign extend key */
 279                 return sys_msgget((int)first, second);
 280         case MSGCTL:
 281                 /* sign extend msqid */
 282                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 283
 284         case SHMAT:
 285                 /* sign extend shmid */
 286                 return compat_sys_shmat((int)first, second, third, version,
 287                                         compat_ptr(ptr));
 288         case SHMDT:
 289                 return sys_shmdt(compat_ptr(ptr));
 290         case SHMGET:
 291                 /* sign extend key_t */
 292                 return sys_shmget((int)first, second, third);
 293         case SHMCTL:
 294                 /* sign extend shmid */
 295                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 296
 297         default:
 298                 return -ENOSYS;
 299         }
 300
 301         return -ENOSYS;
 302 }
 303 #endif
 304
 305 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 306  * with the corresponding cast to a signed int to insure that the
 307  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 308  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 309  */
 310 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 311 {
 312         mm_segment_t old_fs = get_fs();
 313         int ret;
 314         off_t of;
 315         off_t __user *up;
 316
 317         if (offset && get_user(of, offset))
 318                 return -EFAULT;
 319
 320         /* The __user pointer cast is valid because of the set_fs() */
 321         set_fs(KERNEL_DS);
 322         up = offset ? (off_t __user *) &of : NULL;
 323         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 324         set_fs(old_fs);
 325
 326         if (offset && put_user(of, offset))
 327                 return -EFAULT;
 328
 329         return ret;
 330 }
 331
 332 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 333 {
 334         mm_segment_t old_fs = get_fs();
 335         int ret;
 336         loff_t lof;
 337         loff_t __user *up;
 338
 339         if (offset && get_user(lof, offset))
 340                 return -EFAULT;
 341
 342         /* The __user pointer cast is valid because of the set_fs() */
 343         set_fs(KERNEL_DS);
 344         up = offset ? (loff_t __user *) &lof : NULL;
 345         ret = sys_sendfile64(out_fd, in_fd, up, count);
 346         set_fs(old_fs);
 347
 348         if (offset && put_user(lof, offset))
 349                 return -EFAULT;
 350
 351         return ret;
 352 }
 353
 354 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 355                   unsigned long a3, unsigned long a4, unsigned long a5,
 356                   struct pt_regs *regs)
 357 {
 358         int error;
 359         char * filename;
 360
 361         filename = getname((char __user *) a0);
 362         error = PTR_ERR(filename);
 363         if (IS_ERR(filename))
 364                 goto out;
 365         flush_fp_to_thread(current);
 366         flush_altivec_to_thread(current);
 367
 368         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 369
 370         putname(filename);
 371
 372 out:
 373         return error;
 374 }
 375
 376 /* Note: it is necessary to treat option as an unsigned int,
 377  * with the corresponding cast to a signed int to insure that the
 378  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 379  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 380  */
 381 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 382 {
 383         return sys_prctl((int)option,
 384                          (unsigned long) arg2,
 385                          (unsigned long) arg3,
 386                          (unsigned long) arg4,
 387                          (unsigned long) arg5);
 388 }
 389
 390 /* Note: it is necessary to treat pid as an unsigned int,
 391  * with the corresponding cast to a signed int to insure that the
 392  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 393  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 394  */
 395 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 396 {
 397         struct timespec t;
 398         int ret;
 399         mm_segment_t old_fs = get_fs ();
 400
 401         /* The __user pointer cast is valid because of the set_fs() */
 402         set_fs (KERNEL_DS);
 403         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 404         set_fs (old_fs);
 405         if (put_compat_timespec(&t, interval))
 406                 return -EFAULT;
 407         return ret;
 408 }
 409
 410 /* Note: it is necessary to treat mode as an unsigned int,
 411  * with the corresponding cast to a signed int to insure that the
 412  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 413  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 414  */
 415 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 416 {
 417         return sys_access(filename, (int)mode);
 418 }
 419
 420
 421 /* Note: it is necessary to treat mode as an unsigned int,
 422  * with the corresponding cast to a signed int to insure that the
 423  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 424  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 425  */
 426 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 427 {
 428         return sys_creat(pathname, (int)mode);
 429 }
 430
 431
 432 /* Note: it is necessary to treat pid and options as unsigned ints,
 433  * with the corresponding cast to a signed int to insure that the
 434  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 435  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 436  */
 437 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 438 {
 439         return sys_waitpid((int)pid, stat_addr, (int)options);
 440 }
 441
 442
 443 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 444  * with the corresponding cast to a signed int to insure that the
 445  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 446  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 447  */
 448 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 449 {
 450         return sys_getgroups((int)gidsetsize, grouplist);
 451 }
 452
 453
 454 /* Note: it is necessary to treat pid as an unsigned int,
 455  * with the corresponding cast to a signed int to insure that the
 456  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 457  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 458  */
 459 asmlinkage long compat_sys_getpgid(u32 pid)
 460 {
 461         return sys_getpgid((int)pid);
 462 }
 463
 464
 465
 466 /* Note: it is necessary to treat pid as an unsigned int,
 467  * with the corresponding cast to a signed int to insure that the
 468  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 469  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 470  */
 471 asmlinkage long compat_sys_getsid(u32 pid)
 472 {
 473         return sys_getsid((int)pid);
 474 }
 475
 476
 477 /* Note: it is necessary to treat pid and sig as unsigned ints,
 478  * with the corresponding cast to a signed int to insure that the
 479  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 480  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 481  */
 482 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 483 {
 484         return sys_kill((int)pid, (int)sig);
 485 }
 486
 487
 488 /* Note: it is necessary to treat mode as an unsigned int,
 489  * with the corresponding cast to a signed int to insure that the
 490  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 491  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 492  */
 493 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 494 {
 495         return sys_mkdir(pathname, (int)mode);
 496 }
 497
 498 long compat_sys_nice(u32 increment)
 499 {
 500         /* sign extend increment */
 501         return sys_nice((int)increment);
 502 }
 503
 504 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 505 {
 506         /* sign extend n */
 507         return sys_lseek(fd, (int)offset, origin);
 508 }
 509
 510 /* Note: it is necessary to treat bufsiz as an unsigned int,
 511  * with the corresponding cast to a signed int to insure that the
 512  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 513  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 514  */
 515 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 516 {
 517         return sys_readlink(path, buf, (int)bufsiz);
 518 }
 519
 520 /* Note: it is necessary to treat option as an unsigned int,
 521  * with the corresponding cast to a signed int to insure that the
 522  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 523  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 524  */
 525 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 526 {
 527         return sys_sched_get_priority_max((int)policy);
 528 }
 529
 530
 531 /* Note: it is necessary to treat policy as an unsigned int,
 532  * with the corresponding cast to a signed int to insure that the
 533  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 534  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 535  */
 536 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 537 {
 538         return sys_sched_get_priority_min((int)policy);
 539 }
 540
 541
 542 /* Note: it is necessary to treat pid as an unsigned int,
 543  * with the corresponding cast to a signed int to insure that the
 544  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 545  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 546  */
 547 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 548 {
 549         return sys_sched_getparam((int)pid, param);
 550 }
 551
 552
 553 /* Note: it is necessary to treat pid as an unsigned int,
 554  * with the corresponding cast to a signed int to insure that the
 555  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 556  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 557  */
 558 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 559 {
 560         return sys_sched_getscheduler((int)pid);
 561 }
 562
 563
 564 /* Note: it is necessary to treat pid as an unsigned int,
 565  * with the corresponding cast to a signed int to insure that the
 566  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 567  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 568  */
 569 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 570 {
 571         return sys_sched_setparam((int)pid, param);
 572 }
 573
 574
 575 /* Note: it is necessary to treat pid and policy as unsigned ints,
 576  * with the corresponding cast to a signed int to insure that the
 577  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 578  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 579  */
 580 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 581 {
 582         return sys_sched_setscheduler((int)pid, (int)policy, param);
 583 }
 584
 585
 586 /* Note: it is necessary to treat len as an unsigned int,
 587  * with the corresponding cast to a signed int to insure that the
 588  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 589  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 590  */
 591 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 592 {
 593         return sys_setdomainname(name, (int)len);
 594 }
 595
 596
 597 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 598  * with the corresponding cast to a signed int to insure that the
 599  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 600  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 601  */
 602 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 603 {
 604         return sys_setgroups((int)gidsetsize, grouplist);
 605 }
 606
 607
 608 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 609 {
 610         /* sign extend len */
 611         return sys_sethostname(name, (int)len);
 612 }
 613
 614
 615 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 616  * with the corresponding cast to a signed int to insure that the
 617  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 618  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 619  */
 620 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 621 {
 622         return sys_setpgid((int)pid, (int)pgid);
 623 }
 624
 625 long compat_sys_getpriority(u32 which, u32 who)
 626 {
 627         /* sign extend which and who */
 628         return sys_getpriority((int)which, (int)who);
 629 }
 630
 631 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 632 {
 633         /* sign extend which, who and niceval */
 634         return sys_setpriority((int)which, (int)who, (int)niceval);
 635 }
 636
 637 long compat_sys_ioprio_get(u32 which, u32 who)
 638 {
 639         /* sign extend which and who */
 640         return sys_ioprio_get((int)which, (int)who);
 641 }
 642
 643 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 644 {
 645         /* sign extend which, who and ioprio */
 646         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 647 }
 648
 649 /* Note: it is necessary to treat newmask as an unsigned int,
 650  * with the corresponding cast to a signed int to insure that the
 651  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 652  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 653  */
 654 asmlinkage long compat_sys_ssetmask(u32 newmask)
 655 {
 656         return sys_ssetmask((int) newmask);
 657 }
 658
 659 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 660 {
 661         /* sign extend len */
 662         return sys_syslog(type, buf, (int)len);
 663 }
 664
 665
 666 /* Note: it is necessary to treat mask as an unsigned int,
 667  * with the corresponding cast to a signed int to insure that the
 668  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 669  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 670  */
 671 asmlinkage long compat_sys_umask(u32 mask)
 672 {
 673         return sys_umask((int)mask);
 674 }
 675
 676 #ifdef CONFIG_SYSCTL_SYSCALL
 677 struct __sysctl_args32 {
 678         u32 name;
 679         int nlen;
 680         u32 oldval;
 681         u32 oldlenp;
 682         u32 newval;
 683         u32 newlen;
 684         u32 __unused[4];
 685 };
 686
 687 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 688 {
 689         struct __sysctl_args32 tmp;
 690         int error;
 691         size_t oldlen;
 692         size_t __user *oldlenp = NULL;
 693         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 694
 695         if (copy_from_user(&tmp, args, sizeof(tmp)))
 696                 return -EFAULT;
 697
 698         if (tmp.oldval && tmp.oldlenp) {
 699                 /* Duh, this is ugly and might not work if sysctl_args
 700                    is in read-only memory, but do_sysctl does indirectly
 701                    a lot of uaccess in both directions and we'd have to
 702                    basically copy the whole sysctl.c here, and
 703                    glibc's __sysctl uses rw memory for the structure
 704                    anyway.  */
 705                 oldlenp = (size_t __user *)addr;
 706                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 707                     put_user(oldlen, oldlenp))
 708                         return -EFAULT;
 709         }
 710
 711         lock_kernel();
 712         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 713                           compat_ptr(tmp.oldval), oldlenp,
 714                           compat_ptr(tmp.newval), tmp.newlen);
 715         unlock_kernel();
 716         if (oldlenp) {
 717                 if (!error) {
 718                         if (get_user(oldlen, oldlenp) ||
 719                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 720                                 error = -EFAULT;
 721                 }
 722                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 723         }
 724         return error;
 725 }
 726 #endif
 727
 728 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 729                           unsigned long prot, unsigned long flags,
 730                           unsigned long fd, unsigned long pgoff)
 731 {
 732         /* This should remain 12 even if PAGE_SIZE changes */
 733         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 734 }
 735
 736 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 737 {
 738         /* sign extend tgid, pid */
 739         return sys_tgkill((int)tgid, (int)pid, sig);
 740 }
 741
 742 /*
 743  * long long munging:
 744  * The 32 bit ABI passes long longs in an odd even register pair.
 745  */
 746
 747 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 748                              u32 reg6, u32 poshi, u32 poslo)
 749 {
 750         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 751 }
 752
 753 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 754                               u32 reg6, u32 poshi, u32 poslo)
 755 {
 756         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 757 }
 758
 759 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 760 {
 761         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 762 }
 763
 764 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 765                                 unsigned long high, unsigned long low)
 766 {
 767         return sys_truncate(path, (high << 32) | low);
 768 }
 769
 770 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 771                                      u32 lenhi, u32 lenlo)
 772 {
 773         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 774                              ((loff_t)lenhi << 32) | lenlo);
 775 }
 776
 777 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 778                                  unsigned long low)
 779 {
 780         return sys_ftruncate(fd, (high << 32) | low);
 781 }
 782
 783 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 784                           size_t len)
 785 {
 786         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 787                                   buf, len);
 788 }
 789
 790 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 791                      size_t len, int advice)
 792 {
 793         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 794                              advice);
 795 }
 796
 797 asmlinkage long compat_sys_add_key(const char __user *_type,
 798                               const char __user *_description,
 799                               const void __user *_payload,
 800                               u32 plen,
 801                               u32 ringid)
 802 {
 803         return sys_add_key(_type, _description, _payload, plen, ringid);
 804 }
 805
 806 asmlinkage long compat_sys_request_key(const char __user *_type,
 807                                   const char __user *_description,
 808                                   const char __user *_callout_info,
 809                                   u32 destringid)
 810 {
 811         return sys_request_key(_type, _description, _callout_info, destringid);
 812 }
 813
 814 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 815                                    unsigned offset_hi, unsigned offset_lo,
 816                                    unsigned nbytes_hi, unsigned nbytes_lo)
 817 {
 818         loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 819         loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 820
 821         return sys_sync_file_range(fd, offset, nbytes, flags);
 822 }