arch/powerpc/kernel/sys_ppc32.c

   1 /*
   2  * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 2001 IBM
   5  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * environment.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/config.h>
  18 #include <linux/kernel.h>
  19 #include <linux/sched.h>
  20 #include <linux/fs.h>
  21 #include <linux/mm.h>
  22 #include <linux/file.h>
  23 #include <linux/signal.h>
  24 #include <linux/resource.h>
  25 #include <linux/times.h>
  26 #include <linux/utsname.h>
  27 #include <linux/timex.h>
  28 #include <linux/smp.h>
  29 #include <linux/smp_lock.h>
  30 #include <linux/sem.h>
  31 #include <linux/msg.h>
  32 #include <linux/shm.h>
  33 #include <linux/poll.h>
  34 #include <linux/personality.h>
  35 #include <linux/stat.h>
  36 #include <linux/mman.h>
  37 #include <linux/in.h>
  38 #include <linux/syscalls.h>
  39 #include <linux/unistd.h>
  40 #include <linux/sysctl.h>
  41 #include <linux/binfmts.h>
  42 #include <linux/security.h>
  43 #include <linux/compat.h>
  44 #include <linux/ptrace.h>
  45 #include <linux/elf.h>
  46
  47 #include <asm/ptrace.h>
  48 #include <asm/types.h>
  49 #include <asm/ipc.h>
  50 #include <asm/uaccess.h>
  51 #include <asm/unistd.h>
  52 #include <asm/semaphore.h>
  53 #include <asm/time.h>
  54 #include <asm/mmu_context.h>
  55 #include <asm/ppc-pci.h>
  56
  57 /* readdir & getdents */
  58 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  59 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  60
  61 struct old_linux_dirent32 {
  62         u32             d_ino;
  63         u32             d_offset;
  64         unsigned short  d_namlen;
  65         char            d_name[1];
  66 };
  67
  68 struct readdir_callback32 {
  69         struct old_linux_dirent32 __user * dirent;
  70         int count;
  71 };
  72
  73 static int fillonedir(void * __buf, const char * name, int namlen,
  74                                   off_t offset, ino_t ino, unsigned int d_type)
  75 {
  76         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  77         struct old_linux_dirent32 __user * dirent;
  78
  79         if (buf->count)
  80                 return -EINVAL;
  81         buf->count++;
  82         dirent = buf->dirent;
  83         put_user(ino, &dirent->d_ino);
  84         put_user(offset, &dirent->d_offset);
  85         put_user(namlen, &dirent->d_namlen);
  86         copy_to_user(dirent->d_name, name, namlen);
  87         put_user(0, dirent->d_name + namlen);
  88         return 0;
  89 }
  90
  91 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  92 {
  93         int error = -EBADF;
  94         struct file * file;
  95         struct readdir_callback32 buf;
  96
  97         file = fget(fd);
  98         if (!file)
  99                 goto out;
 100
 101         buf.count = 0;
 102         buf.dirent = dirent;
 103
 104         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 105         if (error < 0)
 106                 goto out_putf;
 107         error = buf.count;
 108
 109 out_putf:
 110         fput(file);
 111 out:
 112         return error;
 113 }
 114
 115 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 116                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 117                 compat_uptr_t tvp_x)
 118 {
 119         /* sign extend n */
 120         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 121 }
 122
 123 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 124 {
 125         long err;
 126
 127         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 128             !new_valid_dev(stat->rdev))
 129                 return -EOVERFLOW;
 130
 131         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 132         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 133         err |= __put_user(stat->ino, &statbuf->st_ino);
 134         err |= __put_user(stat->mode, &statbuf->st_mode);
 135         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 136         err |= __put_user(stat->uid, &statbuf->st_uid);
 137         err |= __put_user(stat->gid, &statbuf->st_gid);
 138         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 139         err |= __put_user(stat->size, &statbuf->st_size);
 140         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 141         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 142         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 143         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 144         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 145         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 146         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 147         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 148         err |= __put_user(0, &statbuf->__unused4[0]);
 149         err |= __put_user(0, &statbuf->__unused4[1]);
 150
 151         return err;
 152 }
 153
 154 /* Note: it is necessary to treat option as an unsigned int,
 155  * with the corresponding cast to a signed int to insure that the
 156  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 157  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 158  */
 159 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 160 {
 161         return sys_sysfs((int)option, arg1, arg2);
 162 }
 163
 164 /* Handle adjtimex compatibility. */
 165 struct timex32 {
 166         u32 modes;
 167         s32 offset, freq, maxerror, esterror;
 168         s32 status, constant, precision, tolerance;
 169         struct compat_timeval time;
 170         s32 tick;
 171         s32 ppsfreq, jitter, shift, stabil;
 172         s32 jitcnt, calcnt, errcnt, stbcnt;
 173         s32  :32; s32  :32; s32  :32; s32  :32;
 174         s32  :32; s32  :32; s32  :32; s32  :32;
 175         s32  :32; s32  :32; s32  :32; s32  :32;
 176 };
 177
 178 extern int do_adjtimex(struct timex *);
 179
 180 asmlinkage long compat_sys_adjtimex(struct timex32 __user *utp)
 181 {
 182         struct timex txc;
 183         int ret;
 184
 185         memset(&txc, 0, sizeof(struct timex));
 186
 187         if(get_user(txc.modes, &utp->modes) ||
 188            __get_user(txc.offset, &utp->offset) ||
 189            __get_user(txc.freq, &utp->freq) ||
 190            __get_user(txc.maxerror, &utp->maxerror) ||
 191            __get_user(txc.esterror, &utp->esterror) ||
 192            __get_user(txc.status, &utp->status) ||
 193            __get_user(txc.constant, &utp->constant) ||
 194            __get_user(txc.precision, &utp->precision) ||
 195            __get_user(txc.tolerance, &utp->tolerance) ||
 196            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 197            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 198            __get_user(txc.tick, &utp->tick) ||
 199            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 200            __get_user(txc.jitter, &utp->jitter) ||
 201            __get_user(txc.shift, &utp->shift) ||
 202            __get_user(txc.stabil, &utp->stabil) ||
 203            __get_user(txc.jitcnt, &utp->jitcnt) ||
 204            __get_user(txc.calcnt, &utp->calcnt) ||
 205            __get_user(txc.errcnt, &utp->errcnt) ||
 206            __get_user(txc.stbcnt, &utp->stbcnt))
 207                 return -EFAULT;
 208
 209         ret = do_adjtimex(&txc);
 210
 211         if(put_user(txc.modes, &utp->modes) ||
 212            __put_user(txc.offset, &utp->offset) ||
 213            __put_user(txc.freq, &utp->freq) ||
 214            __put_user(txc.maxerror, &utp->maxerror) ||
 215            __put_user(txc.esterror, &utp->esterror) ||
 216            __put_user(txc.status, &utp->status) ||
 217            __put_user(txc.constant, &utp->constant) ||
 218            __put_user(txc.precision, &utp->precision) ||
 219            __put_user(txc.tolerance, &utp->tolerance) ||
 220            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 221            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 222            __put_user(txc.tick, &utp->tick) ||
 223            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 224            __put_user(txc.jitter, &utp->jitter) ||
 225            __put_user(txc.shift, &utp->shift) ||
 226            __put_user(txc.stabil, &utp->stabil) ||
 227            __put_user(txc.jitcnt, &utp->jitcnt) ||
 228            __put_user(txc.calcnt, &utp->calcnt) ||
 229            __put_user(txc.errcnt, &utp->errcnt) ||
 230            __put_user(txc.stbcnt, &utp->stbcnt))
 231                 ret = -EFAULT;
 232
 233         return ret;
 234 }
 235
 236 asmlinkage long compat_sys_pause(void)
 237 {
 238         current->state = TASK_INTERRUPTIBLE;
 239         schedule();
 240
 241         return -ERESTARTNOHAND;
 242 }
 243
 244 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 245 {
 246         long usec;
 247
 248         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 249                 return -EFAULT;
 250         if (__get_user(o->tv_sec, &i->tv_sec))
 251                 return -EFAULT;
 252         if (__get_user(usec, &i->tv_usec))
 253                 return -EFAULT;
 254         o->tv_nsec = usec * 1000;
 255         return 0;
 256 }
 257
 258 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 259 {
 260         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 261                 (__put_user(i->tv_sec, &o->tv_sec) |
 262                  __put_user(i->tv_usec, &o->tv_usec)));
 263 }
 264
 265 struct sysinfo32 {
 266         s32 uptime;
 267         u32 loads[3];
 268         u32 totalram;
 269         u32 freeram;
 270         u32 sharedram;
 271         u32 bufferram;
 272         u32 totalswap;
 273         u32 freeswap;
 274         unsigned short procs;
 275         unsigned short pad;
 276         u32 totalhigh;
 277         u32 freehigh;
 278         u32 mem_unit;
 279         char _f[20-2*sizeof(int)-sizeof(int)];
 280 };
 281
 282 asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
 283 {
 284         struct sysinfo s;
 285         int ret, err;
 286         int bitcount=0;
 287         mm_segment_t old_fs = get_fs ();
 288
 289         /* The __user cast is valid due to set_fs() */
 290         set_fs (KERNEL_DS);
 291         ret = sys_sysinfo((struct sysinfo __user *)&s);
 292         set_fs (old_fs);
 293
 294         /* Check to see if any memory value is too large for 32-bit and
 295          * scale down if needed.
 296          */
 297         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 298             while (s.mem_unit < PAGE_SIZE) {
 299                 s.mem_unit <<= 1;
 300                 bitcount++;
 301             }
 302             s.totalram >>=bitcount;
 303             s.freeram >>= bitcount;
 304             s.sharedram >>= bitcount;
 305             s.bufferram >>= bitcount;
 306             s.totalswap >>= bitcount;
 307             s.freeswap >>= bitcount;
 308             s.totalhigh >>= bitcount;
 309             s.freehigh >>= bitcount;
 310         }
 311
 312         err = put_user (s.uptime, &info->uptime);
 313         err |= __put_user (s.loads[0], &info->loads[0]);
 314         err |= __put_user (s.loads[1], &info->loads[1]);
 315         err |= __put_user (s.loads[2], &info->loads[2]);
 316         err |= __put_user (s.totalram, &info->totalram);
 317         err |= __put_user (s.freeram, &info->freeram);
 318         err |= __put_user (s.sharedram, &info->sharedram);
 319         err |= __put_user (s.bufferram, &info->bufferram);
 320         err |= __put_user (s.totalswap, &info->totalswap);
 321         err |= __put_user (s.freeswap, &info->freeswap);
 322         err |= __put_user (s.procs, &info->procs);
 323         err |= __put_user (s.totalhigh, &info->totalhigh);
 324         err |= __put_user (s.freehigh, &info->freehigh);
 325         err |= __put_user (s.mem_unit, &info->mem_unit);
 326         if (err)
 327                 return -EFAULT;
 328
 329         return ret;
 330 }
 331
 332
 333
 334
 335 /* Translations due to time_t size differences.  Which affects all
 336    sorts of things, like timeval and itimerval.  */
 337 extern struct timezone sys_tz;
 338
 339 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 340 {
 341         if (tv) {
 342                 struct timeval ktv;
 343                 do_gettimeofday(&ktv);
 344                 if (put_tv32(tv, &ktv))
 345                         return -EFAULT;
 346         }
 347         if (tz) {
 348                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 349                         return -EFAULT;
 350         }
 351
 352         return 0;
 353 }
 354
 355
 356
 357 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 358 {
 359         struct timespec kts;
 360         struct timezone ktz;
 361
 362         if (tv) {
 363                 if (get_ts32(&kts, tv))
 364                         return -EFAULT;
 365         }
 366         if (tz) {
 367                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 368                         return -EFAULT;
 369         }
 370
 371         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 372 }
 373
 374 #ifdef CONFIG_SYSVIPC
 375 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 376                u32 fifth)
 377 {
 378         int version;
 379
 380         version = call >> 16; /* hack for backward compatibility */
 381         call &= 0xffff;
 382
 383         switch (call) {
 384
 385         case SEMTIMEDOP:
 386                 if (fifth)
 387                         /* sign extend semid */
 388                         return compat_sys_semtimedop((int)first,
 389                                                      compat_ptr(ptr), second,
 390                                                      compat_ptr(fifth));
 391                 /* else fall through for normal semop() */
 392         case SEMOP:
 393                 /* struct sembuf is the same on 32 and 64bit :)) */
 394                 /* sign extend semid */
 395                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 396                                       NULL);
 397         case SEMGET:
 398                 /* sign extend key, nsems */
 399                 return sys_semget((int)first, (int)second, third);
 400         case SEMCTL:
 401                 /* sign extend semid, semnum */
 402                 return compat_sys_semctl((int)first, (int)second, third,
 403                                          compat_ptr(ptr));
 404
 405         case MSGSND:
 406                 /* sign extend msqid */
 407                 return compat_sys_msgsnd((int)first, (int)second, third,
 408                                          compat_ptr(ptr));
 409         case MSGRCV:
 410                 /* sign extend msqid, msgtyp */
 411                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 412                                          third, version, compat_ptr(ptr));
 413         case MSGGET:
 414                 /* sign extend key */
 415                 return sys_msgget((int)first, second);
 416         case MSGCTL:
 417                 /* sign extend msqid */
 418                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 419
 420         case SHMAT:
 421                 /* sign extend shmid */
 422                 return compat_sys_shmat((int)first, second, third, version,
 423                                         compat_ptr(ptr));
 424         case SHMDT:
 425                 return sys_shmdt(compat_ptr(ptr));
 426         case SHMGET:
 427                 /* sign extend key_t */
 428                 return sys_shmget((int)first, second, third);
 429         case SHMCTL:
 430                 /* sign extend shmid */
 431                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 432
 433         default:
 434                 return -ENOSYS;
 435         }
 436
 437         return -ENOSYS;
 438 }
 439 #endif
 440
 441 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 442  * with the corresponding cast to a signed int to insure that the
 443  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 444  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 445  */
 446 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 447 {
 448         mm_segment_t old_fs = get_fs();
 449         int ret;
 450         off_t of;
 451         off_t __user *up;
 452
 453         if (offset && get_user(of, offset))
 454                 return -EFAULT;
 455
 456         /* The __user pointer cast is valid because of the set_fs() */
 457         set_fs(KERNEL_DS);
 458         up = offset ? (off_t __user *) &of : NULL;
 459         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 460         set_fs(old_fs);
 461
 462         if (offset && put_user(of, offset))
 463                 return -EFAULT;
 464
 465         return ret;
 466 }
 467
 468 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 469 {
 470         mm_segment_t old_fs = get_fs();
 471         int ret;
 472         loff_t lof;
 473         loff_t __user *up;
 474
 475         if (offset && get_user(lof, offset))
 476                 return -EFAULT;
 477
 478         /* The __user pointer cast is valid because of the set_fs() */
 479         set_fs(KERNEL_DS);
 480         up = offset ? (loff_t __user *) &lof : NULL;
 481         ret = sys_sendfile64(out_fd, in_fd, up, count);
 482         set_fs(old_fs);
 483
 484         if (offset && put_user(lof, offset))
 485                 return -EFAULT;
 486
 487         return ret;
 488 }
 489
 490 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 491                   unsigned long a3, unsigned long a4, unsigned long a5,
 492                   struct pt_regs *regs)
 493 {
 494         int error;
 495         char * filename;
 496
 497         filename = getname((char __user *) a0);
 498         error = PTR_ERR(filename);
 499         if (IS_ERR(filename))
 500                 goto out;
 501         flush_fp_to_thread(current);
 502         flush_altivec_to_thread(current);
 503
 504         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 505
 506         if (error == 0) {
 507                 task_lock(current);
 508                 current->ptrace &= ~PT_DTRACE;
 509                 task_unlock(current);
 510         }
 511         putname(filename);
 512
 513 out:
 514         return error;
 515 }
 516
 517 /* Note: it is necessary to treat option as an unsigned int,
 518  * with the corresponding cast to a signed int to insure that the
 519  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 520  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 521  */
 522 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 523 {
 524         return sys_prctl((int)option,
 525                          (unsigned long) arg2,
 526                          (unsigned long) arg3,
 527                          (unsigned long) arg4,
 528                          (unsigned long) arg5);
 529 }
 530
 531 /* Note: it is necessary to treat pid 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_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 537 {
 538         struct timespec t;
 539         int ret;
 540         mm_segment_t old_fs = get_fs ();
 541
 542         /* The __user pointer cast is valid because of the set_fs() */
 543         set_fs (KERNEL_DS);
 544         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 545         set_fs (old_fs);
 546         if (put_compat_timespec(&t, interval))
 547                 return -EFAULT;
 548         return ret;
 549 }
 550
 551 /* Note: it is necessary to treat mode as an unsigned int,
 552  * with the corresponding cast to a signed int to insure that the
 553  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 554  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 555  */
 556 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 557 {
 558         return sys_access(filename, (int)mode);
 559 }
 560
 561
 562 /* Note: it is necessary to treat mode as an unsigned int,
 563  * with the corresponding cast to a signed int to insure that the
 564  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 565  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 566  */
 567 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 568 {
 569         return sys_creat(pathname, (int)mode);
 570 }
 571
 572
 573 /* Note: it is necessary to treat pid and options as unsigned ints,
 574  * with the corresponding cast to a signed int to insure that the
 575  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 576  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 577  */
 578 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 579 {
 580         return sys_waitpid((int)pid, stat_addr, (int)options);
 581 }
 582
 583
 584 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 585  * with the corresponding cast to a signed int to insure that the
 586  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 587  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 588  */
 589 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 590 {
 591         return sys_getgroups((int)gidsetsize, grouplist);
 592 }
 593
 594
 595 /* Note: it is necessary to treat pid as an unsigned int,
 596  * with the corresponding cast to a signed int to insure that the
 597  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 598  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 599  */
 600 asmlinkage long compat_sys_getpgid(u32 pid)
 601 {
 602         return sys_getpgid((int)pid);
 603 }
 604
 605
 606
 607 /* Note: it is necessary to treat pid 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_getsid(u32 pid)
 613 {
 614         return sys_getsid((int)pid);
 615 }
 616
 617
 618 /* Note: it is necessary to treat pid and sig as unsigned ints,
 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_kill(u32 pid, u32 sig)
 624 {
 625         return sys_kill((int)pid, (int)sig);
 626 }
 627
 628
 629 /* Note: it is necessary to treat mode 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_mkdir(const char __user * pathname, u32 mode)
 635 {
 636         return sys_mkdir(pathname, (int)mode);
 637 }
 638
 639 long compat_sys_nice(u32 increment)
 640 {
 641         /* sign extend increment */
 642         return sys_nice((int)increment);
 643 }
 644
 645 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 646 {
 647         /* sign extend n */
 648         return sys_lseek(fd, (int)offset, origin);
 649 }
 650
 651 /* Note: it is necessary to treat bufsiz as an unsigned int,
 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_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 657 {
 658         return sys_readlink(path, buf, (int)bufsiz);
 659 }
 660
 661 /* Note: it is necessary to treat option as an unsigned int,
 662  * with the corresponding cast to a signed int to insure that the
 663  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 664  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 665  */
 666 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 667 {
 668         return sys_sched_get_priority_max((int)policy);
 669 }
 670
 671
 672 /* Note: it is necessary to treat policy as an unsigned int,
 673  * with the corresponding cast to a signed int to insure that the
 674  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 675  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 676  */
 677 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 678 {
 679         return sys_sched_get_priority_min((int)policy);
 680 }
 681
 682
 683 /* Note: it is necessary to treat pid as an unsigned int,
 684  * with the corresponding cast to a signed int to insure that the
 685  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 686  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 687  */
 688 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 689 {
 690         return sys_sched_getparam((int)pid, param);
 691 }
 692
 693
 694 /* Note: it is necessary to treat pid as an unsigned int,
 695  * with the corresponding cast to a signed int to insure that the
 696  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 697  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 698  */
 699 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 700 {
 701         return sys_sched_getscheduler((int)pid);
 702 }
 703
 704
 705 /* Note: it is necessary to treat pid as an unsigned int,
 706  * with the corresponding cast to a signed int to insure that the
 707  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 708  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 709  */
 710 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 711 {
 712         return sys_sched_setparam((int)pid, param);
 713 }
 714
 715
 716 /* Note: it is necessary to treat pid and policy as unsigned ints,
 717  * with the corresponding cast to a signed int to insure that the
 718  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 719  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 720  */
 721 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 722 {
 723         return sys_sched_setscheduler((int)pid, (int)policy, param);
 724 }
 725
 726
 727 /* Note: it is necessary to treat len as an unsigned int,
 728  * with the corresponding cast to a signed int to insure that the
 729  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 730  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 731  */
 732 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 733 {
 734         return sys_setdomainname(name, (int)len);
 735 }
 736
 737
 738 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 739  * with the corresponding cast to a signed int to insure that the
 740  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 741  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 742  */
 743 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 744 {
 745         return sys_setgroups((int)gidsetsize, grouplist);
 746 }
 747
 748
 749 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 750 {
 751         /* sign extend len */
 752         return sys_sethostname(name, (int)len);
 753 }
 754
 755
 756 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 757  * with the corresponding cast to a signed int to insure that the
 758  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 759  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 760  */
 761 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 762 {
 763         return sys_setpgid((int)pid, (int)pgid);
 764 }
 765
 766 long compat_sys_getpriority(u32 which, u32 who)
 767 {
 768         /* sign extend which and who */
 769         return sys_getpriority((int)which, (int)who);
 770 }
 771
 772 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 773 {
 774         /* sign extend which, who and niceval */
 775         return sys_setpriority((int)which, (int)who, (int)niceval);
 776 }
 777
 778 long compat_sys_ioprio_get(u32 which, u32 who)
 779 {
 780         /* sign extend which and who */
 781         return sys_ioprio_get((int)which, (int)who);
 782 }
 783
 784 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 785 {
 786         /* sign extend which, who and ioprio */
 787         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 788 }
 789
 790 /* Note: it is necessary to treat newmask as an unsigned int,
 791  * with the corresponding cast to a signed int to insure that the
 792  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 793  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 794  */
 795 asmlinkage long compat_sys_ssetmask(u32 newmask)
 796 {
 797         return sys_ssetmask((int) newmask);
 798 }
 799
 800 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 801 {
 802         /* sign extend len */
 803         return sys_syslog(type, buf, (int)len);
 804 }
 805
 806
 807 /* Note: it is necessary to treat mask as an unsigned int,
 808  * with the corresponding cast to a signed int to insure that the
 809  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 810  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 811  */
 812 asmlinkage long compat_sys_umask(u32 mask)
 813 {
 814         return sys_umask((int)mask);
 815 }
 816
 817 #ifdef CONFIG_SYSCTL
 818 struct __sysctl_args32 {
 819         u32 name;
 820         int nlen;
 821         u32 oldval;
 822         u32 oldlenp;
 823         u32 newval;
 824         u32 newlen;
 825         u32 __unused[4];
 826 };
 827
 828 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 829 {
 830         struct __sysctl_args32 tmp;
 831         int error;
 832         size_t oldlen;
 833         size_t __user *oldlenp = NULL;
 834         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 835
 836         if (copy_from_user(&tmp, args, sizeof(tmp)))
 837                 return -EFAULT;
 838
 839         if (tmp.oldval && tmp.oldlenp) {
 840                 /* Duh, this is ugly and might not work if sysctl_args
 841                    is in read-only memory, but do_sysctl does indirectly
 842                    a lot of uaccess in both directions and we'd have to
 843                    basically copy the whole sysctl.c here, and
 844                    glibc's __sysctl uses rw memory for the structure
 845                    anyway.  */
 846                 oldlenp = (size_t __user *)addr;
 847                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 848                     put_user(oldlen, oldlenp))
 849                         return -EFAULT;
 850         }
 851
 852         lock_kernel();
 853         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 854                           compat_ptr(tmp.oldval), oldlenp,
 855                           compat_ptr(tmp.newval), tmp.newlen);
 856         unlock_kernel();
 857         if (oldlenp) {
 858                 if (!error) {
 859                         if (get_user(oldlen, oldlenp) ||
 860                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 861                                 error = -EFAULT;
 862                 }
 863                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 864         }
 865         return error;
 866 }
 867 #endif
 868
 869 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 870                           unsigned long prot, unsigned long flags,
 871                           unsigned long fd, unsigned long pgoff)
 872 {
 873         /* This should remain 12 even if PAGE_SIZE changes */
 874         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 875 }
 876
 877 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 878 {
 879         /* sign extend tgid, pid */
 880         return sys_tgkill((int)tgid, (int)pid, sig);
 881 }
 882
 883 /*
 884  * long long munging:
 885  * The 32 bit ABI passes long longs in an odd even register pair.
 886  */
 887
 888 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 889                              u32 reg6, u32 poshi, u32 poslo)
 890 {
 891         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 892 }
 893
 894 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 895                               u32 reg6, u32 poshi, u32 poslo)
 896 {
 897         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 898 }
 899
 900 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 901 {
 902         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 903 }
 904
 905 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 906                                 unsigned long high, unsigned long low)
 907 {
 908         return sys_truncate(path, (high << 32) | low);
 909 }
 910
 911 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 912                                  unsigned long low)
 913 {
 914         return sys_ftruncate(fd, (high << 32) | low);
 915 }
 916
 917 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 918                           size_t len)
 919 {
 920         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 921                                   buf, len);
 922 }
 923
 924 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 925                      size_t len, int advice)
 926 {
 927         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 928                              advice);
 929 }
 930
 931 asmlinkage long compat_sys_add_key(const char __user *_type,
 932                               const char __user *_description,
 933                               const void __user *_payload,
 934                               u32 plen,
 935                               u32 ringid)
 936 {
 937         return sys_add_key(_type, _description, _payload, plen, ringid);
 938 }
 939
 940 asmlinkage long compat_sys_request_key(const char __user *_type,
 941                                   const char __user *_description,
 942                                   const char __user *_callout_info,
 943                                   u32 destringid)
 944 {
 945         return sys_request_key(_type, _description, _callout_info, destringid);
 946 }
 947