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
  45 #include <asm/ptrace.h>
  46 #include <asm/types.h>
  47 #include <asm/ipc.h>
  48 #include <asm/uaccess.h>
  49 #include <asm/unistd.h>
  50 #include <asm/semaphore.h>
  51 #include <asm/time.h>
  52 #include <asm/mmu_context.h>
  53 #include <asm/ppc-pci.h>
  54
  55 /* readdir & getdents */
  56 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  57 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  58
  59 struct old_linux_dirent32 {
  60         u32             d_ino;
  61         u32             d_offset;
  62         unsigned short  d_namlen;
  63         char            d_name[1];
  64 };
  65
  66 struct readdir_callback32 {
  67         struct old_linux_dirent32 __user * dirent;
  68         int count;
  69 };
  70
  71 static int fillonedir(void * __buf, const char * name, int namlen,
  72                                   off_t offset, u64 ino, unsigned int d_type)
  73 {
  74         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  75         struct old_linux_dirent32 __user * dirent;
  76         ino_t d_ino;
  77
  78         if (buf->count)
  79                 return -EINVAL;
  80         d_ino = ino;
  81         if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
  82                 return -EOVERFLOW;
  83         buf->count++;
  84         dirent = buf->dirent;
  85         put_user(d_ino, &dirent->d_ino);
  86         put_user(offset, &dirent->d_offset);
  87         put_user(namlen, &dirent->d_namlen);
  88         copy_to_user(dirent->d_name, name, namlen);
  89         put_user(0, dirent->d_name + namlen);
  90         return 0;
  91 }
  92
  93 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  94 {
  95         int error = -EBADF;
  96         struct file * file;
  97         struct readdir_callback32 buf;
  98
  99         file = fget(fd);
 100         if (!file)
 101                 goto out;
 102
 103         buf.count = 0;
 104         buf.dirent = dirent;
 105
 106         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 107         if (error < 0)
 108                 goto out_putf;
 109         error = buf.count;
 110
 111 out_putf:
 112         fput(file);
 113 out:
 114         return error;
 115 }
 116
 117 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 118                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 119                 compat_uptr_t tvp_x)
 120 {
 121         /* sign extend n */
 122         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 123 }
 124
 125 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 126 {
 127         compat_ino_t ino;
 128         long err;
 129
 130         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 131             !new_valid_dev(stat->rdev))
 132                 return -EOVERFLOW;
 133
 134         ino = stat->ino;
 135         if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
 136                 return -EOVERFLOW;
 137
 138         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 139         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 140         err |= __put_user(ino, &statbuf->st_ino);
 141         err |= __put_user(stat->mode, &statbuf->st_mode);
 142         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 143         err |= __put_user(stat->uid, &statbuf->st_uid);
 144         err |= __put_user(stat->gid, &statbuf->st_gid);
 145         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 146         err |= __put_user(stat->size, &statbuf->st_size);
 147         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 148         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 149         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 150         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 151         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 152         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 153         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 154         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 155         err |= __put_user(0, &statbuf->__unused4[0]);
 156         err |= __put_user(0, &statbuf->__unused4[1]);
 157
 158         return err;
 159 }
 160
 161 /* Note: it is necessary to treat option as an unsigned int,
 162  * with the corresponding cast to a signed int to insure that the
 163  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 164  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 165  */
 166 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 167 {
 168         return sys_sysfs((int)option, arg1, arg2);
 169 }
 170
 171 asmlinkage long compat_sys_pause(void)
 172 {
 173         current->state = TASK_INTERRUPTIBLE;
 174         schedule();
 175
 176         return -ERESTARTNOHAND;
 177 }
 178
 179 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 180 {
 181         long usec;
 182
 183         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 184                 return -EFAULT;
 185         if (__get_user(o->tv_sec, &i->tv_sec))
 186                 return -EFAULT;
 187         if (__get_user(usec, &i->tv_usec))
 188                 return -EFAULT;
 189         o->tv_nsec = usec * 1000;
 190         return 0;
 191 }
 192
 193 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 194 {
 195         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 196                 (__put_user(i->tv_sec, &o->tv_sec) |
 197                  __put_user(i->tv_usec, &o->tv_usec)));
 198 }
 199
 200 struct sysinfo32 {
 201         s32 uptime;
 202         u32 loads[3];
 203         u32 totalram;
 204         u32 freeram;
 205         u32 sharedram;
 206         u32 bufferram;
 207         u32 totalswap;
 208         u32 freeswap;
 209         unsigned short procs;
 210         unsigned short pad;
 211         u32 totalhigh;
 212         u32 freehigh;
 213         u32 mem_unit;
 214         char _f[20-2*sizeof(int)-sizeof(int)];
 215 };
 216
 217 asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
 218 {
 219         struct sysinfo s;
 220         int ret, err;
 221         int bitcount=0;
 222         mm_segment_t old_fs = get_fs ();
 223
 224         /* The __user cast is valid due to set_fs() */
 225         set_fs (KERNEL_DS);
 226         ret = sys_sysinfo((struct sysinfo __user *)&s);
 227         set_fs (old_fs);
 228
 229         /* Check to see if any memory value is too large for 32-bit and
 230          * scale down if needed.
 231          */
 232         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 233             while (s.mem_unit < PAGE_SIZE) {
 234                 s.mem_unit <<= 1;
 235                 bitcount++;
 236             }
 237             s.totalram >>=bitcount;
 238             s.freeram >>= bitcount;
 239             s.sharedram >>= bitcount;
 240             s.bufferram >>= bitcount;
 241             s.totalswap >>= bitcount;
 242             s.freeswap >>= bitcount;
 243             s.totalhigh >>= bitcount;
 244             s.freehigh >>= bitcount;
 245         }
 246
 247         err = put_user (s.uptime, &info->uptime);
 248         err |= __put_user (s.loads[0], &info->loads[0]);
 249         err |= __put_user (s.loads[1], &info->loads[1]);
 250         err |= __put_user (s.loads[2], &info->loads[2]);
 251         err |= __put_user (s.totalram, &info->totalram);
 252         err |= __put_user (s.freeram, &info->freeram);
 253         err |= __put_user (s.sharedram, &info->sharedram);
 254         err |= __put_user (s.bufferram, &info->bufferram);
 255         err |= __put_user (s.totalswap, &info->totalswap);
 256         err |= __put_user (s.freeswap, &info->freeswap);
 257         err |= __put_user (s.procs, &info->procs);
 258         err |= __put_user (s.totalhigh, &info->totalhigh);
 259         err |= __put_user (s.freehigh, &info->freehigh);
 260         err |= __put_user (s.mem_unit, &info->mem_unit);
 261         if (err)
 262                 return -EFAULT;
 263
 264         return ret;
 265 }
 266
 267
 268
 269
 270 /* Translations due to time_t size differences.  Which affects all
 271    sorts of things, like timeval and itimerval.  */
 272 extern struct timezone sys_tz;
 273
 274 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 275 {
 276         if (tv) {
 277                 struct timeval ktv;
 278                 do_gettimeofday(&ktv);
 279                 if (put_tv32(tv, &ktv))
 280                         return -EFAULT;
 281         }
 282         if (tz) {
 283                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 284                         return -EFAULT;
 285         }
 286
 287         return 0;
 288 }
 289
 290
 291
 292 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 293 {
 294         struct timespec kts;
 295         struct timezone ktz;
 296
 297         if (tv) {
 298                 if (get_ts32(&kts, tv))
 299                         return -EFAULT;
 300         }
 301         if (tz) {
 302                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 303                         return -EFAULT;
 304         }
 305
 306         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 307 }
 308
 309 #ifdef CONFIG_SYSVIPC
 310 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 311                u32 fifth)
 312 {
 313         int version;
 314
 315         version = call >> 16; /* hack for backward compatibility */
 316         call &= 0xffff;
 317
 318         switch (call) {
 319
 320         case SEMTIMEDOP:
 321                 if (fifth)
 322                         /* sign extend semid */
 323                         return compat_sys_semtimedop((int)first,
 324                                                      compat_ptr(ptr), second,
 325                                                      compat_ptr(fifth));
 326                 /* else fall through for normal semop() */
 327         case SEMOP:
 328                 /* struct sembuf is the same on 32 and 64bit :)) */
 329                 /* sign extend semid */
 330                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 331                                       NULL);
 332         case SEMGET:
 333                 /* sign extend key, nsems */
 334                 return sys_semget((int)first, (int)second, third);
 335         case SEMCTL:
 336                 /* sign extend semid, semnum */
 337                 return compat_sys_semctl((int)first, (int)second, third,
 338                                          compat_ptr(ptr));
 339
 340         case MSGSND:
 341                 /* sign extend msqid */
 342                 return compat_sys_msgsnd((int)first, (int)second, third,
 343                                          compat_ptr(ptr));
 344         case MSGRCV:
 345                 /* sign extend msqid, msgtyp */
 346                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 347                                          third, version, compat_ptr(ptr));
 348         case MSGGET:
 349                 /* sign extend key */
 350                 return sys_msgget((int)first, second);
 351         case MSGCTL:
 352                 /* sign extend msqid */
 353                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 354
 355         case SHMAT:
 356                 /* sign extend shmid */
 357                 return compat_sys_shmat((int)first, second, third, version,
 358                                         compat_ptr(ptr));
 359         case SHMDT:
 360                 return sys_shmdt(compat_ptr(ptr));
 361         case SHMGET:
 362                 /* sign extend key_t */
 363                 return sys_shmget((int)first, second, third);
 364         case SHMCTL:
 365                 /* sign extend shmid */
 366                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 367
 368         default:
 369                 return -ENOSYS;
 370         }
 371
 372         return -ENOSYS;
 373 }
 374 #endif
 375
 376 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 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_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 382 {
 383         mm_segment_t old_fs = get_fs();
 384         int ret;
 385         off_t of;
 386         off_t __user *up;
 387
 388         if (offset && get_user(of, offset))
 389                 return -EFAULT;
 390
 391         /* The __user pointer cast is valid because of the set_fs() */
 392         set_fs(KERNEL_DS);
 393         up = offset ? (off_t __user *) &of : NULL;
 394         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 395         set_fs(old_fs);
 396
 397         if (offset && put_user(of, offset))
 398                 return -EFAULT;
 399
 400         return ret;
 401 }
 402
 403 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 404 {
 405         mm_segment_t old_fs = get_fs();
 406         int ret;
 407         loff_t lof;
 408         loff_t __user *up;
 409
 410         if (offset && get_user(lof, offset))
 411                 return -EFAULT;
 412
 413         /* The __user pointer cast is valid because of the set_fs() */
 414         set_fs(KERNEL_DS);
 415         up = offset ? (loff_t __user *) &lof : NULL;
 416         ret = sys_sendfile64(out_fd, in_fd, up, count);
 417         set_fs(old_fs);
 418
 419         if (offset && put_user(lof, offset))
 420                 return -EFAULT;
 421
 422         return ret;
 423 }
 424
 425 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 426                   unsigned long a3, unsigned long a4, unsigned long a5,
 427                   struct pt_regs *regs)
 428 {
 429         int error;
 430         char * filename;
 431
 432         filename = getname((char __user *) a0);
 433         error = PTR_ERR(filename);
 434         if (IS_ERR(filename))
 435                 goto out;
 436         flush_fp_to_thread(current);
 437         flush_altivec_to_thread(current);
 438
 439         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 440
 441         if (error == 0) {
 442                 task_lock(current);
 443                 current->ptrace &= ~PT_DTRACE;
 444                 task_unlock(current);
 445         }
 446         putname(filename);
 447
 448 out:
 449         return error;
 450 }
 451
 452 /* Note: it is necessary to treat option as an unsigned int,
 453  * with the corresponding cast to a signed int to insure that the
 454  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 455  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 456  */
 457 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 458 {
 459         return sys_prctl((int)option,
 460                          (unsigned long) arg2,
 461                          (unsigned long) arg3,
 462                          (unsigned long) arg4,
 463                          (unsigned long) arg5);
 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_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 472 {
 473         struct timespec t;
 474         int ret;
 475         mm_segment_t old_fs = get_fs ();
 476
 477         /* The __user pointer cast is valid because of the set_fs() */
 478         set_fs (KERNEL_DS);
 479         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 480         set_fs (old_fs);
 481         if (put_compat_timespec(&t, interval))
 482                 return -EFAULT;
 483         return ret;
 484 }
 485
 486 /* Note: it is necessary to treat mode as an unsigned int,
 487  * with the corresponding cast to a signed int to insure that the
 488  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 489  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 490  */
 491 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 492 {
 493         return sys_access(filename, (int)mode);
 494 }
 495
 496
 497 /* Note: it is necessary to treat mode as an unsigned int,
 498  * with the corresponding cast to a signed int to insure that the
 499  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 500  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 501  */
 502 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 503 {
 504         return sys_creat(pathname, (int)mode);
 505 }
 506
 507
 508 /* Note: it is necessary to treat pid and options as unsigned ints,
 509  * with the corresponding cast to a signed int to insure that the
 510  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 511  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 512  */
 513 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 514 {
 515         return sys_waitpid((int)pid, stat_addr, (int)options);
 516 }
 517
 518
 519 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 520  * with the corresponding cast to a signed int to insure that the
 521  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 522  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 523  */
 524 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 525 {
 526         return sys_getgroups((int)gidsetsize, grouplist);
 527 }
 528
 529
 530 /* Note: it is necessary to treat pid as an unsigned int,
 531  * with the corresponding cast to a signed int to insure that the
 532  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 533  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 534  */
 535 asmlinkage long compat_sys_getpgid(u32 pid)
 536 {
 537         return sys_getpgid((int)pid);
 538 }
 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_getsid(u32 pid)
 548 {
 549         return sys_getsid((int)pid);
 550 }
 551
 552
 553 /* Note: it is necessary to treat pid and sig as unsigned ints,
 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_kill(u32 pid, u32 sig)
 559 {
 560         return sys_kill((int)pid, (int)sig);
 561 }
 562
 563
 564 /* Note: it is necessary to treat mode 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_mkdir(const char __user * pathname, u32 mode)
 570 {
 571         return sys_mkdir(pathname, (int)mode);
 572 }
 573
 574 long compat_sys_nice(u32 increment)
 575 {
 576         /* sign extend increment */
 577         return sys_nice((int)increment);
 578 }
 579
 580 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 581 {
 582         /* sign extend n */
 583         return sys_lseek(fd, (int)offset, origin);
 584 }
 585
 586 /* Note: it is necessary to treat bufsiz 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_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 592 {
 593         return sys_readlink(path, buf, (int)bufsiz);
 594 }
 595
 596 /* Note: it is necessary to treat option as an unsigned int,
 597  * with the corresponding cast to a signed int to insure that the
 598  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 599  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 600  */
 601 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 602 {
 603         return sys_sched_get_priority_max((int)policy);
 604 }
 605
 606
 607 /* Note: it is necessary to treat policy as an unsigned int,
 608  * with the corresponding cast to a signed int to insure that the
 609  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 610  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 611  */
 612 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 613 {
 614         return sys_sched_get_priority_min((int)policy);
 615 }
 616
 617
 618 /* Note: it is necessary to treat pid as an unsigned int,
 619  * with the corresponding cast to a signed int to insure that the
 620  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 621  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 622  */
 623 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 624 {
 625         return sys_sched_getparam((int)pid, param);
 626 }
 627
 628
 629 /* Note: it is necessary to treat pid as an unsigned int,
 630  * with the corresponding cast to a signed int to insure that the
 631  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 632  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 633  */
 634 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 635 {
 636         return sys_sched_getscheduler((int)pid);
 637 }
 638
 639
 640 /* Note: it is necessary to treat pid as an unsigned int,
 641  * with the corresponding cast to a signed int to insure that the
 642  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 643  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 644  */
 645 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 646 {
 647         return sys_sched_setparam((int)pid, param);
 648 }
 649
 650
 651 /* Note: it is necessary to treat pid and policy as unsigned ints,
 652  * with the corresponding cast to a signed int to insure that the
 653  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 654  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 655  */
 656 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 657 {
 658         return sys_sched_setscheduler((int)pid, (int)policy, param);
 659 }
 660
 661
 662 /* Note: it is necessary to treat len as an unsigned int,
 663  * with the corresponding cast to a signed int to insure that the
 664  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 665  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 666  */
 667 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 668 {
 669         return sys_setdomainname(name, (int)len);
 670 }
 671
 672
 673 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 674  * with the corresponding cast to a signed int to insure that the
 675  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 676  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 677  */
 678 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 679 {
 680         return sys_setgroups((int)gidsetsize, grouplist);
 681 }
 682
 683
 684 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 685 {
 686         /* sign extend len */
 687         return sys_sethostname(name, (int)len);
 688 }
 689
 690
 691 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 692  * with the corresponding cast to a signed int to insure that the
 693  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 694  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 695  */
 696 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 697 {
 698         return sys_setpgid((int)pid, (int)pgid);
 699 }
 700
 701 long compat_sys_getpriority(u32 which, u32 who)
 702 {
 703         /* sign extend which and who */
 704         return sys_getpriority((int)which, (int)who);
 705 }
 706
 707 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 708 {
 709         /* sign extend which, who and niceval */
 710         return sys_setpriority((int)which, (int)who, (int)niceval);
 711 }
 712
 713 long compat_sys_ioprio_get(u32 which, u32 who)
 714 {
 715         /* sign extend which and who */
 716         return sys_ioprio_get((int)which, (int)who);
 717 }
 718
 719 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 720 {
 721         /* sign extend which, who and ioprio */
 722         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 723 }
 724
 725 /* Note: it is necessary to treat newmask 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_ssetmask(u32 newmask)
 731 {
 732         return sys_ssetmask((int) newmask);
 733 }
 734
 735 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 736 {
 737         /* sign extend len */
 738         return sys_syslog(type, buf, (int)len);
 739 }
 740
 741
 742 /* Note: it is necessary to treat mask as an unsigned int,
 743  * with the corresponding cast to a signed int to insure that the
 744  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 745  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 746  */
 747 asmlinkage long compat_sys_umask(u32 mask)
 748 {
 749         return sys_umask((int)mask);
 750 }
 751
 752 #ifdef CONFIG_SYSCTL_SYSCALL
 753 struct __sysctl_args32 {
 754         u32 name;
 755         int nlen;
 756         u32 oldval;
 757         u32 oldlenp;
 758         u32 newval;
 759         u32 newlen;
 760         u32 __unused[4];
 761 };
 762
 763 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 764 {
 765         struct __sysctl_args32 tmp;
 766         int error;
 767         size_t oldlen;
 768         size_t __user *oldlenp = NULL;
 769         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 770
 771         if (copy_from_user(&tmp, args, sizeof(tmp)))
 772                 return -EFAULT;
 773
 774         if (tmp.oldval && tmp.oldlenp) {
 775                 /* Duh, this is ugly and might not work if sysctl_args
 776                    is in read-only memory, but do_sysctl does indirectly
 777                    a lot of uaccess in both directions and we'd have to
 778                    basically copy the whole sysctl.c here, and
 779                    glibc's __sysctl uses rw memory for the structure
 780                    anyway.  */
 781                 oldlenp = (size_t __user *)addr;
 782                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 783                     put_user(oldlen, oldlenp))
 784                         return -EFAULT;
 785         }
 786
 787         lock_kernel();
 788         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 789                           compat_ptr(tmp.oldval), oldlenp,
 790                           compat_ptr(tmp.newval), tmp.newlen);
 791         unlock_kernel();
 792         if (oldlenp) {
 793                 if (!error) {
 794                         if (get_user(oldlen, oldlenp) ||
 795                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 796                                 error = -EFAULT;
 797                 }
 798                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 799         }
 800         return error;
 801 }
 802 #endif
 803
 804 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 805                           unsigned long prot, unsigned long flags,
 806                           unsigned long fd, unsigned long pgoff)
 807 {
 808         /* This should remain 12 even if PAGE_SIZE changes */
 809         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 810 }
 811
 812 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 813 {
 814         /* sign extend tgid, pid */
 815         return sys_tgkill((int)tgid, (int)pid, sig);
 816 }
 817
 818 /*
 819  * long long munging:
 820  * The 32 bit ABI passes long longs in an odd even register pair.
 821  */
 822
 823 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 824                              u32 reg6, u32 poshi, u32 poslo)
 825 {
 826         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 827 }
 828
 829 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 830                               u32 reg6, u32 poshi, u32 poslo)
 831 {
 832         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 833 }
 834
 835 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 836 {
 837         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 838 }
 839
 840 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 841                                 unsigned long high, unsigned long low)
 842 {
 843         return sys_truncate(path, (high << 32) | low);
 844 }
 845
 846 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 847                                  unsigned long low)
 848 {
 849         return sys_ftruncate(fd, (high << 32) | low);
 850 }
 851
 852 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 853                           size_t len)
 854 {
 855         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 856                                   buf, len);
 857 }
 858
 859 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 860                      size_t len, int advice)
 861 {
 862         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 863                              advice);
 864 }
 865
 866 asmlinkage long compat_sys_add_key(const char __user *_type,
 867                               const char __user *_description,
 868                               const void __user *_payload,
 869                               u32 plen,
 870                               u32 ringid)
 871 {
 872         return sys_add_key(_type, _description, _payload, plen, ringid);
 873 }
 874
 875 asmlinkage long compat_sys_request_key(const char __user *_type,
 876                                   const char __user *_description,
 877                                   const char __user *_callout_info,
 878                                   u32 destringid)
 879 {
 880         return sys_request_key(_type, _description, _callout_info, destringid);
 881 }
 882