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/systemcfg.h>
  56 #include <asm/ppc-pci.h>
  57
  58 /* readdir & getdents */
  59 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  60 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  61
  62 struct old_linux_dirent32 {
  63         u32             d_ino;
  64         u32             d_offset;
  65         unsigned short  d_namlen;
  66         char            d_name[1];
  67 };
  68
  69 struct readdir_callback32 {
  70         struct old_linux_dirent32 __user * dirent;
  71         int count;
  72 };
  73
  74 static int fillonedir(void * __buf, const char * name, int namlen,
  75                                   off_t offset, ino_t ino, unsigned int d_type)
  76 {
  77         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  78         struct old_linux_dirent32 __user * dirent;
  79
  80         if (buf->count)
  81                 return -EINVAL;
  82         buf->count++;
  83         dirent = buf->dirent;
  84         put_user(ino, &dirent->d_ino);
  85         put_user(offset, &dirent->d_offset);
  86         put_user(namlen, &dirent->d_namlen);
  87         copy_to_user(dirent->d_name, name, namlen);
  88         put_user(0, dirent->d_name + namlen);
  89         return 0;
  90 }
  91
  92 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  93 {
  94         int error = -EBADF;
  95         struct file * file;
  96         struct readdir_callback32 buf;
  97
  98         file = fget(fd);
  99         if (!file)
 100                 goto out;
 101
 102         buf.count = 0;
 103         buf.dirent = dirent;
 104
 105         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 106         if (error < 0)
 107                 goto out_putf;
 108         error = buf.count;
 109
 110 out_putf:
 111         fput(file);
 112 out:
 113         return error;
 114 }
 115
 116 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 117                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 118                 compat_uptr_t tvp_x)
 119 {
 120         /* sign extend n */
 121         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 122 }
 123
 124 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 125 {
 126         long err;
 127
 128         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 129             !new_valid_dev(stat->rdev))
 130                 return -EOVERFLOW;
 131
 132         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 133         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 134         err |= __put_user(stat->ino, &statbuf->st_ino);
 135         err |= __put_user(stat->mode, &statbuf->st_mode);
 136         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 137         err |= __put_user(stat->uid, &statbuf->st_uid);
 138         err |= __put_user(stat->gid, &statbuf->st_gid);
 139         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 140         err |= __put_user(stat->size, &statbuf->st_size);
 141         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 142         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 143         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 144         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 145         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 146         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 147         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 148         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 149         err |= __put_user(0, &statbuf->__unused4[0]);
 150         err |= __put_user(0, &statbuf->__unused4[1]);
 151
 152         return err;
 153 }
 154
 155 /* Note: it is necessary to treat option as an unsigned int,
 156  * with the corresponding cast to a signed int to insure that the
 157  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 158  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 159  */
 160 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 161 {
 162         return sys_sysfs((int)option, arg1, arg2);
 163 }
 164
 165 /* Handle adjtimex compatibility. */
 166 struct timex32 {
 167         u32 modes;
 168         s32 offset, freq, maxerror, esterror;
 169         s32 status, constant, precision, tolerance;
 170         struct compat_timeval time;
 171         s32 tick;
 172         s32 ppsfreq, jitter, shift, stabil;
 173         s32 jitcnt, calcnt, errcnt, stbcnt;
 174         s32  :32; s32  :32; s32  :32; s32  :32;
 175         s32  :32; s32  :32; s32  :32; s32  :32;
 176         s32  :32; s32  :32; s32  :32; s32  :32;
 177 };
 178
 179 extern int do_adjtimex(struct timex *);
 180 extern void ppc_adjtimex(void);
 181
 182 asmlinkage long compat_sys_adjtimex(struct timex32 __user *utp)
 183 {
 184         struct timex txc;
 185         int ret;
 186
 187         memset(&txc, 0, sizeof(struct timex));
 188
 189         if(get_user(txc.modes, &utp->modes) ||
 190            __get_user(txc.offset, &utp->offset) ||
 191            __get_user(txc.freq, &utp->freq) ||
 192            __get_user(txc.maxerror, &utp->maxerror) ||
 193            __get_user(txc.esterror, &utp->esterror) ||
 194            __get_user(txc.status, &utp->status) ||
 195            __get_user(txc.constant, &utp->constant) ||
 196            __get_user(txc.precision, &utp->precision) ||
 197            __get_user(txc.tolerance, &utp->tolerance) ||
 198            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 199            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 200            __get_user(txc.tick, &utp->tick) ||
 201            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 202            __get_user(txc.jitter, &utp->jitter) ||
 203            __get_user(txc.shift, &utp->shift) ||
 204            __get_user(txc.stabil, &utp->stabil) ||
 205            __get_user(txc.jitcnt, &utp->jitcnt) ||
 206            __get_user(txc.calcnt, &utp->calcnt) ||
 207            __get_user(txc.errcnt, &utp->errcnt) ||
 208            __get_user(txc.stbcnt, &utp->stbcnt))
 209                 return -EFAULT;
 210
 211         ret = do_adjtimex(&txc);
 212
 213         /* adjust the conversion of TB to time of day to track adjtimex */
 214         ppc_adjtimex();
 215
 216         if(put_user(txc.modes, &utp->modes) ||
 217            __put_user(txc.offset, &utp->offset) ||
 218            __put_user(txc.freq, &utp->freq) ||
 219            __put_user(txc.maxerror, &utp->maxerror) ||
 220            __put_user(txc.esterror, &utp->esterror) ||
 221            __put_user(txc.status, &utp->status) ||
 222            __put_user(txc.constant, &utp->constant) ||
 223            __put_user(txc.precision, &utp->precision) ||
 224            __put_user(txc.tolerance, &utp->tolerance) ||
 225            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 226            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 227            __put_user(txc.tick, &utp->tick) ||
 228            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 229            __put_user(txc.jitter, &utp->jitter) ||
 230            __put_user(txc.shift, &utp->shift) ||
 231            __put_user(txc.stabil, &utp->stabil) ||
 232            __put_user(txc.jitcnt, &utp->jitcnt) ||
 233            __put_user(txc.calcnt, &utp->calcnt) ||
 234            __put_user(txc.errcnt, &utp->errcnt) ||
 235            __put_user(txc.stbcnt, &utp->stbcnt))
 236                 ret = -EFAULT;
 237
 238         return ret;
 239 }
 240
 241 asmlinkage long compat_sys_pause(void)
 242 {
 243         current->state = TASK_INTERRUPTIBLE;
 244         schedule();
 245
 246         return -ERESTARTNOHAND;
 247 }
 248
 249 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 250 {
 251         long usec;
 252
 253         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 254                 return -EFAULT;
 255         if (__get_user(o->tv_sec, &i->tv_sec))
 256                 return -EFAULT;
 257         if (__get_user(usec, &i->tv_usec))
 258                 return -EFAULT;
 259         o->tv_nsec = usec * 1000;
 260         return 0;
 261 }
 262
 263 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 264 {
 265         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 266                 (__put_user(i->tv_sec, &o->tv_sec) |
 267                  __put_user(i->tv_usec, &o->tv_usec)));
 268 }
 269
 270 struct sysinfo32 {
 271         s32 uptime;
 272         u32 loads[3];
 273         u32 totalram;
 274         u32 freeram;
 275         u32 sharedram;
 276         u32 bufferram;
 277         u32 totalswap;
 278         u32 freeswap;
 279         unsigned short procs;
 280         unsigned short pad;
 281         u32 totalhigh;
 282         u32 freehigh;
 283         u32 mem_unit;
 284         char _f[20-2*sizeof(int)-sizeof(int)];
 285 };
 286
 287 asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
 288 {
 289         struct sysinfo s;
 290         int ret, err;
 291         int bitcount=0;
 292         mm_segment_t old_fs = get_fs ();
 293
 294         /* The __user cast is valid due to set_fs() */
 295         set_fs (KERNEL_DS);
 296         ret = sys_sysinfo((struct sysinfo __user *)&s);
 297         set_fs (old_fs);
 298
 299         /* Check to see if any memory value is too large for 32-bit and
 300          * scale down if needed.
 301          */
 302         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 303             while (s.mem_unit < PAGE_SIZE) {
 304                 s.mem_unit <<= 1;
 305                 bitcount++;
 306             }
 307             s.totalram >>=bitcount;
 308             s.freeram >>= bitcount;
 309             s.sharedram >>= bitcount;
 310             s.bufferram >>= bitcount;
 311             s.totalswap >>= bitcount;
 312             s.freeswap >>= bitcount;
 313             s.totalhigh >>= bitcount;
 314             s.freehigh >>= bitcount;
 315         }
 316
 317         err = put_user (s.uptime, &info->uptime);
 318         err |= __put_user (s.loads[0], &info->loads[0]);
 319         err |= __put_user (s.loads[1], &info->loads[1]);
 320         err |= __put_user (s.loads[2], &info->loads[2]);
 321         err |= __put_user (s.totalram, &info->totalram);
 322         err |= __put_user (s.freeram, &info->freeram);
 323         err |= __put_user (s.sharedram, &info->sharedram);
 324         err |= __put_user (s.bufferram, &info->bufferram);
 325         err |= __put_user (s.totalswap, &info->totalswap);
 326         err |= __put_user (s.freeswap, &info->freeswap);
 327         err |= __put_user (s.procs, &info->procs);
 328         err |= __put_user (s.totalhigh, &info->totalhigh);
 329         err |= __put_user (s.freehigh, &info->freehigh);
 330         err |= __put_user (s.mem_unit, &info->mem_unit);
 331         if (err)
 332                 return -EFAULT;
 333
 334         return ret;
 335 }
 336
 337
 338
 339
 340 /* Translations due to time_t size differences.  Which affects all
 341    sorts of things, like timeval and itimerval.  */
 342 extern struct timezone sys_tz;
 343
 344 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 345 {
 346         if (tv) {
 347                 struct timeval ktv;
 348                 do_gettimeofday(&ktv);
 349                 if (put_tv32(tv, &ktv))
 350                         return -EFAULT;
 351         }
 352         if (tz) {
 353                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 354                         return -EFAULT;
 355         }
 356
 357         return 0;
 358 }
 359
 360
 361
 362 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 363 {
 364         struct timespec kts;
 365         struct timezone ktz;
 366
 367         if (tv) {
 368                 if (get_ts32(&kts, tv))
 369                         return -EFAULT;
 370         }
 371         if (tz) {
 372                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 373                         return -EFAULT;
 374         }
 375
 376         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 377 }
 378
 379 #ifdef CONFIG_SYSVIPC
 380 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 381                u32 fifth)
 382 {
 383         int version;
 384
 385         version = call >> 16; /* hack for backward compatibility */
 386         call &= 0xffff;
 387
 388         switch (call) {
 389
 390         case SEMTIMEDOP:
 391                 if (fifth)
 392                         /* sign extend semid */
 393                         return compat_sys_semtimedop((int)first,
 394                                                      compat_ptr(ptr), second,
 395                                                      compat_ptr(fifth));
 396                 /* else fall through for normal semop() */
 397         case SEMOP:
 398                 /* struct sembuf is the same on 32 and 64bit :)) */
 399                 /* sign extend semid */
 400                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 401                                       NULL);
 402         case SEMGET:
 403                 /* sign extend key, nsems */
 404                 return sys_semget((int)first, (int)second, third);
 405         case SEMCTL:
 406                 /* sign extend semid, semnum */
 407                 return compat_sys_semctl((int)first, (int)second, third,
 408                                          compat_ptr(ptr));
 409
 410         case MSGSND:
 411                 /* sign extend msqid */
 412                 return compat_sys_msgsnd((int)first, (int)second, third,
 413                                          compat_ptr(ptr));
 414         case MSGRCV:
 415                 /* sign extend msqid, msgtyp */
 416                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 417                                          third, version, compat_ptr(ptr));
 418         case MSGGET:
 419                 /* sign extend key */
 420                 return sys_msgget((int)first, second);
 421         case MSGCTL:
 422                 /* sign extend msqid */
 423                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 424
 425         case SHMAT:
 426                 /* sign extend shmid */
 427                 return compat_sys_shmat((int)first, second, third, version,
 428                                         compat_ptr(ptr));
 429         case SHMDT:
 430                 return sys_shmdt(compat_ptr(ptr));
 431         case SHMGET:
 432                 /* sign extend key_t */
 433                 return sys_shmget((int)first, second, third);
 434         case SHMCTL:
 435                 /* sign extend shmid */
 436                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 437
 438         default:
 439                 return -ENOSYS;
 440         }
 441
 442         return -ENOSYS;
 443 }
 444 #endif
 445
 446 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 447  * with the corresponding cast to a signed int to insure that the
 448  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 449  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 450  */
 451 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 452 {
 453         mm_segment_t old_fs = get_fs();
 454         int ret;
 455         off_t of;
 456         off_t __user *up;
 457
 458         if (offset && get_user(of, offset))
 459                 return -EFAULT;
 460
 461         /* The __user pointer cast is valid because of the set_fs() */
 462         set_fs(KERNEL_DS);
 463         up = offset ? (off_t __user *) &of : NULL;
 464         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 465         set_fs(old_fs);
 466
 467         if (offset && put_user(of, offset))
 468                 return -EFAULT;
 469
 470         return ret;
 471 }
 472
 473 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 474 {
 475         mm_segment_t old_fs = get_fs();
 476         int ret;
 477         loff_t lof;
 478         loff_t __user *up;
 479
 480         if (offset && get_user(lof, offset))
 481                 return -EFAULT;
 482
 483         /* The __user pointer cast is valid because of the set_fs() */
 484         set_fs(KERNEL_DS);
 485         up = offset ? (loff_t __user *) &lof : NULL;
 486         ret = sys_sendfile64(out_fd, in_fd, up, count);
 487         set_fs(old_fs);
 488
 489         if (offset && put_user(lof, offset))
 490                 return -EFAULT;
 491
 492         return ret;
 493 }
 494
 495 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 496                   unsigned long a3, unsigned long a4, unsigned long a5,
 497                   struct pt_regs *regs)
 498 {
 499         int error;
 500         char * filename;
 501
 502         filename = getname((char __user *) a0);
 503         error = PTR_ERR(filename);
 504         if (IS_ERR(filename))
 505                 goto out;
 506         flush_fp_to_thread(current);
 507         flush_altivec_to_thread(current);
 508
 509         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 510
 511         if (error == 0) {
 512                 task_lock(current);
 513                 current->ptrace &= ~PT_DTRACE;
 514                 task_unlock(current);
 515         }
 516         putname(filename);
 517
 518 out:
 519         return error;
 520 }
 521
 522 /* Note: it is necessary to treat option as an unsigned int,
 523  * with the corresponding cast to a signed int to insure that the
 524  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 525  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 526  */
 527 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 528 {
 529         return sys_prctl((int)option,
 530                          (unsigned long) arg2,
 531                          (unsigned long) arg3,
 532                          (unsigned long) arg4,
 533                          (unsigned long) arg5);
 534 }
 535
 536 /* Note: it is necessary to treat pid as an unsigned int,
 537  * with the corresponding cast to a signed int to insure that the
 538  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 539  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 540  */
 541 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 542 {
 543         struct timespec t;
 544         int ret;
 545         mm_segment_t old_fs = get_fs ();
 546
 547         /* The __user pointer cast is valid because of the set_fs() */
 548         set_fs (KERNEL_DS);
 549         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 550         set_fs (old_fs);
 551         if (put_compat_timespec(&t, interval))
 552                 return -EFAULT;
 553         return ret;
 554 }
 555
 556 asmlinkage int compat_sys_pciconfig_read(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf)
 557 {
 558         return sys_pciconfig_read((unsigned long) bus,
 559                                   (unsigned long) dfn,
 560                                   (unsigned long) off,
 561                                   (unsigned long) len,
 562                                   compat_ptr(ubuf));
 563 }
 564
 565 asmlinkage int compat_sys_pciconfig_write(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf)
 566 {
 567         return sys_pciconfig_write((unsigned long) bus,
 568                                    (unsigned long) dfn,
 569                                    (unsigned long) off,
 570                                    (unsigned long) len,
 571                                    compat_ptr(ubuf));
 572 }
 573
 574 asmlinkage int compat_sys_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn)
 575 {
 576         return sys_pciconfig_iobase(which, in_bus, in_devfn);
 577 }
 578
 579
 580 /* Note: it is necessary to treat mode as an unsigned int,
 581  * with the corresponding cast to a signed int to insure that the
 582  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 583  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 584  */
 585 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 586 {
 587         return sys_access(filename, (int)mode);
 588 }
 589
 590
 591 /* Note: it is necessary to treat mode as an unsigned int,
 592  * with the corresponding cast to a signed int to insure that the
 593  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 594  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 595  */
 596 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 597 {
 598         return sys_creat(pathname, (int)mode);
 599 }
 600
 601
 602 /* Note: it is necessary to treat pid and options as unsigned ints,
 603  * with the corresponding cast to a signed int to insure that the
 604  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 605  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 606  */
 607 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 608 {
 609         return sys_waitpid((int)pid, stat_addr, (int)options);
 610 }
 611
 612
 613 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 614  * with the corresponding cast to a signed int to insure that the
 615  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 616  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 617  */
 618 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 619 {
 620         return sys_getgroups((int)gidsetsize, grouplist);
 621 }
 622
 623
 624 /* Note: it is necessary to treat pid as an unsigned int,
 625  * with the corresponding cast to a signed int to insure that the
 626  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 627  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 628  */
 629 asmlinkage long compat_sys_getpgid(u32 pid)
 630 {
 631         return sys_getpgid((int)pid);
 632 }
 633
 634
 635
 636 /* Note: it is necessary to treat pid as an unsigned int,
 637  * with the corresponding cast to a signed int to insure that the
 638  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 639  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 640  */
 641 asmlinkage long compat_sys_getsid(u32 pid)
 642 {
 643         return sys_getsid((int)pid);
 644 }
 645
 646
 647 /* Note: it is necessary to treat pid and sig as unsigned ints,
 648  * with the corresponding cast to a signed int to insure that the
 649  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 650  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 651  */
 652 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 653 {
 654         return sys_kill((int)pid, (int)sig);
 655 }
 656
 657
 658 /* Note: it is necessary to treat mode as an unsigned int,
 659  * with the corresponding cast to a signed int to insure that the
 660  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 661  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 662  */
 663 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 664 {
 665         return sys_mkdir(pathname, (int)mode);
 666 }
 667
 668 long compat_sys_nice(u32 increment)
 669 {
 670         /* sign extend increment */
 671         return sys_nice((int)increment);
 672 }
 673
 674 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 675 {
 676         /* sign extend n */
 677         return sys_lseek(fd, (int)offset, origin);
 678 }
 679
 680 /* Note: it is necessary to treat bufsiz as an unsigned int,
 681  * with the corresponding cast to a signed int to insure that the
 682  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 683  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 684  */
 685 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 686 {
 687         return sys_readlink(path, buf, (int)bufsiz);
 688 }
 689
 690 /* Note: it is necessary to treat option as an unsigned int,
 691  * with the corresponding cast to a signed int to insure that the
 692  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 693  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 694  */
 695 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 696 {
 697         return sys_sched_get_priority_max((int)policy);
 698 }
 699
 700
 701 /* Note: it is necessary to treat policy as an unsigned int,
 702  * with the corresponding cast to a signed int to insure that the
 703  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 704  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 705  */
 706 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 707 {
 708         return sys_sched_get_priority_min((int)policy);
 709 }
 710
 711
 712 /* Note: it is necessary to treat pid as an unsigned int,
 713  * with the corresponding cast to a signed int to insure that the
 714  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 715  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 716  */
 717 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 718 {
 719         return sys_sched_getparam((int)pid, param);
 720 }
 721
 722
 723 /* Note: it is necessary to treat pid as an unsigned int,
 724  * with the corresponding cast to a signed int to insure that the
 725  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 726  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 727  */
 728 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 729 {
 730         return sys_sched_getscheduler((int)pid);
 731 }
 732
 733
 734 /* Note: it is necessary to treat pid as an unsigned int,
 735  * with the corresponding cast to a signed int to insure that the
 736  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 737  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 738  */
 739 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 740 {
 741         return sys_sched_setparam((int)pid, param);
 742 }
 743
 744
 745 /* Note: it is necessary to treat pid and policy as unsigned ints,
 746  * with the corresponding cast to a signed int to insure that the
 747  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 748  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 749  */
 750 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 751 {
 752         return sys_sched_setscheduler((int)pid, (int)policy, param);
 753 }
 754
 755
 756 /* Note: it is necessary to treat len as an unsigned int,
 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_setdomainname(char __user *name, u32 len)
 762 {
 763         return sys_setdomainname(name, (int)len);
 764 }
 765
 766
 767 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 768  * with the corresponding cast to a signed int to insure that the
 769  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 770  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 771  */
 772 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 773 {
 774         return sys_setgroups((int)gidsetsize, grouplist);
 775 }
 776
 777
 778 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 779 {
 780         /* sign extend len */
 781         return sys_sethostname(name, (int)len);
 782 }
 783
 784
 785 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 786  * with the corresponding cast to a signed int to insure that the
 787  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 788  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 789  */
 790 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 791 {
 792         return sys_setpgid((int)pid, (int)pgid);
 793 }
 794
 795 long compat_sys_getpriority(u32 which, u32 who)
 796 {
 797         /* sign extend which and who */
 798         return sys_getpriority((int)which, (int)who);
 799 }
 800
 801 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 802 {
 803         /* sign extend which, who and niceval */
 804         return sys_setpriority((int)which, (int)who, (int)niceval);
 805 }
 806
 807 long compat_sys_ioprio_get(u32 which, u32 who)
 808 {
 809         /* sign extend which and who */
 810         return sys_ioprio_get((int)which, (int)who);
 811 }
 812
 813 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 814 {
 815         /* sign extend which, who and ioprio */
 816         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 817 }
 818
 819 /* Note: it is necessary to treat newmask as an unsigned int,
 820  * with the corresponding cast to a signed int to insure that the
 821  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 822  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 823  */
 824 asmlinkage long compat_sys_ssetmask(u32 newmask)
 825 {
 826         return sys_ssetmask((int) newmask);
 827 }
 828
 829 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 830 {
 831         /* sign extend len */
 832         return sys_syslog(type, buf, (int)len);
 833 }
 834
 835
 836 /* Note: it is necessary to treat mask as an unsigned int,
 837  * with the corresponding cast to a signed int to insure that the
 838  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 839  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 840  */
 841 asmlinkage long compat_sys_umask(u32 mask)
 842 {
 843         return sys_umask((int)mask);
 844 }
 845
 846 #ifdef CONFIG_SYSCTL
 847 struct __sysctl_args32 {
 848         u32 name;
 849         int nlen;
 850         u32 oldval;
 851         u32 oldlenp;
 852         u32 newval;
 853         u32 newlen;
 854         u32 __unused[4];
 855 };
 856
 857 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 858 {
 859         struct __sysctl_args32 tmp;
 860         int error;
 861         size_t oldlen;
 862         size_t __user *oldlenp = NULL;
 863         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 864
 865         if (copy_from_user(&tmp, args, sizeof(tmp)))
 866                 return -EFAULT;
 867
 868         if (tmp.oldval && tmp.oldlenp) {
 869                 /* Duh, this is ugly and might not work if sysctl_args
 870                    is in read-only memory, but do_sysctl does indirectly
 871                    a lot of uaccess in both directions and we'd have to
 872                    basically copy the whole sysctl.c here, and
 873                    glibc's __sysctl uses rw memory for the structure
 874                    anyway.  */
 875                 oldlenp = (size_t __user *)addr;
 876                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 877                     put_user(oldlen, oldlenp))
 878                         return -EFAULT;
 879         }
 880
 881         lock_kernel();
 882         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 883                           compat_ptr(tmp.oldval), oldlenp,
 884                           compat_ptr(tmp.newval), tmp.newlen);
 885         unlock_kernel();
 886         if (oldlenp) {
 887                 if (!error) {
 888                         if (get_user(oldlen, oldlenp) ||
 889                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 890                                 error = -EFAULT;
 891                 }
 892                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 893         }
 894         return error;
 895 }
 896 #endif
 897
 898 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 899                           unsigned long prot, unsigned long flags,
 900                           unsigned long fd, unsigned long pgoff)
 901 {
 902         /* This should remain 12 even if PAGE_SIZE changes */
 903         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 904 }
 905
 906 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 907 {
 908         /* sign extend tgid, pid */
 909         return sys_tgkill((int)tgid, (int)pid, sig);
 910 }
 911
 912 /*
 913  * long long munging:
 914  * The 32 bit ABI passes long longs in an odd even register pair.
 915  */
 916
 917 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 918                              u32 reg6, u32 poshi, u32 poslo)
 919 {
 920         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 921 }
 922
 923 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 924                               u32 reg6, u32 poshi, u32 poslo)
 925 {
 926         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 927 }
 928
 929 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 930 {
 931         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 932 }
 933
 934 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 935                                 unsigned long high, unsigned long low)
 936 {
 937         return sys_truncate(path, (high << 32) | low);
 938 }
 939
 940 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 941                                  unsigned long low)
 942 {
 943         return sys_ftruncate(fd, (high << 32) | low);
 944 }
 945
 946 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 947                           size_t len)
 948 {
 949         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 950                                   buf, len);
 951 }
 952
 953 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 954                      size_t len, int advice)
 955 {
 956         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 957                              advice);
 958 }
 959
 960 long ppc32_timer_create(clockid_t clock,
 961                         struct compat_sigevent __user *ev32,
 962                         timer_t __user *timer_id)
 963 {
 964         sigevent_t event;
 965         timer_t t;
 966         long err;
 967         mm_segment_t savefs;
 968
 969         if (ev32 == NULL)
 970                 return sys_timer_create(clock, NULL, timer_id);
 971
 972         if (get_compat_sigevent(&event, ev32))
 973                 return -EFAULT;
 974
 975         if (!access_ok(VERIFY_WRITE, timer_id, sizeof(timer_t)))
 976                 return -EFAULT;
 977
 978         savefs = get_fs();
 979         set_fs(KERNEL_DS);
 980         /* The __user pointer casts are valid due to the set_fs() */
 981         err = sys_timer_create(clock,
 982                 (sigevent_t __user *) &event,
 983                 (timer_t __user *) &t);
 984         set_fs(savefs);
 985
 986         if (err == 0)
 987                 err = __put_user(t, timer_id);
 988
 989         return err;
 990 }
 991
 992 asmlinkage long compat_sys_add_key(const char __user *_type,
 993                               const char __user *_description,
 994                               const void __user *_payload,
 995                               u32 plen,
 996                               u32 ringid)
 997 {
 998         return sys_add_key(_type, _description, _payload, plen, ringid);
 999 }
1000
1001 asmlinkage long compat_sys_request_key(const char __user *_type,
1002                                   const char __user *_description,
1003                                   const char __user *_callout_info,
1004                                   u32 destringid)
1005 {
1006         return sys_request_key(_type, _description, _callout_info, destringid);
1007 }
1008