arch/sparc/kernel/sys_sparc32.c

   1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   2  *
   3  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   4  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
   5  *
   6  * These routines maintain argument size conversion between 32bit and 64bit
   7  * environment.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/sched.h>
  12 #include <linux/capability.h>
  13 #include <linux/fs.h>
  14 #include <linux/mm.h>
  15 #include <linux/file.h>
  16 #include <linux/signal.h>
  17 #include <linux/resource.h>
  18 #include <linux/times.h>
  19 #include <linux/smp.h>
  20 #include <linux/smp_lock.h>
  21 #include <linux/sem.h>
  22 #include <linux/msg.h>
  23 #include <linux/shm.h>
  24 #include <linux/slab.h>
  25 #include <linux/uio.h>
  26 #include <linux/nfs_fs.h>
  27 #include <linux/quota.h>
  28 #include <linux/module.h>
  29 #include <linux/sunrpc/svc.h>
  30 #include <linux/nfsd/nfsd.h>
  31 #include <linux/nfsd/cache.h>
  32 #include <linux/nfsd/xdr.h>
  33 #include <linux/nfsd/syscall.h>
  34 #include <linux/poll.h>
  35 #include <linux/personality.h>
  36 #include <linux/stat.h>
  37 #include <linux/filter.h>
  38 #include <linux/highmem.h>
  39 #include <linux/highuid.h>
  40 #include <linux/mman.h>
  41 #include <linux/ipv6.h>
  42 #include <linux/in.h>
  43 #include <linux/icmpv6.h>
  44 #include <linux/syscalls.h>
  45 #include <linux/sysctl.h>
  46 #include <linux/binfmts.h>
  47 #include <linux/dnotify.h>
  48 #include <linux/security.h>
  49 #include <linux/compat.h>
  50 #include <linux/vfs.h>
  51 #include <linux/netfilter_ipv4/ip_tables.h>
  52 #include <linux/ptrace.h>
  53
  54 #include <asm/types.h>
  55 #include <asm/uaccess.h>
  56 #include <asm/fpumacro.h>
  57 #include <asm/mmu_context.h>
  58 #include <asm/compat_signal.h>
  59
  60 #ifdef CONFIG_SYSVIPC
  61 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
  62 {
  63         int version;
  64
  65         version = call >> 16; /* hack for backward compatibility */
  66         call &= 0xffff;
  67
  68         switch (call) {
  69         case SEMTIMEDOP:
  70                 if (fifth)
  71                         /* sign extend semid */
  72                         return compat_sys_semtimedop((int)first,
  73                                                      compat_ptr(ptr), second,
  74                                                      compat_ptr(fifth));
  75                 /* else fall through for normal semop() */
  76         case SEMOP:
  77                 /* struct sembuf is the same on 32 and 64bit :)) */
  78                 /* sign extend semid */
  79                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
  80                                       NULL);
  81         case SEMGET:
  82                 /* sign extend key, nsems */
  83                 return sys_semget((int)first, (int)second, third);
  84         case SEMCTL:
  85                 /* sign extend semid, semnum */
  86                 return compat_sys_semctl((int)first, (int)second, third,
  87                                          compat_ptr(ptr));
  88
  89         case MSGSND:
  90                 /* sign extend msqid */
  91                 return compat_sys_msgsnd((int)first, (int)second, third,
  92                                          compat_ptr(ptr));
  93         case MSGRCV:
  94                 /* sign extend msqid, msgtyp */
  95                 return compat_sys_msgrcv((int)first, second, (int)fifth,
  96                                          third, version, compat_ptr(ptr));
  97         case MSGGET:
  98                 /* sign extend key */
  99                 return sys_msgget((int)first, second);
 100         case MSGCTL:
 101                 /* sign extend msqid */
 102                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 103
 104         case SHMAT:
 105                 /* sign extend shmid */
 106                 return compat_sys_shmat((int)first, second, third, version,
 107                                         compat_ptr(ptr));
 108         case SHMDT:
 109                 return sys_shmdt(compat_ptr(ptr));
 110         case SHMGET:
 111                 /* sign extend key_t */
 112                 return sys_shmget((int)first, second, third);
 113         case SHMCTL:
 114                 /* sign extend shmid */
 115                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 116
 117         default:
 118                 return -ENOSYS;
 119         };
 120
 121         return -ENOSYS;
 122 }
 123 #endif
 124
 125 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 126 {
 127         if ((int)high < 0)
 128                 return -EINVAL;
 129         else
 130                 return sys_truncate(path, (high << 32) | low);
 131 }
 132
 133 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 134 {
 135         if ((int)high < 0)
 136                 return -EINVAL;
 137         else
 138                 return sys_ftruncate(fd, (high << 32) | low);
 139 }
 140
 141 static int cp_compat_stat64(struct kstat *stat,
 142                             struct compat_stat64 __user *statbuf)
 143 {
 144         int err;
 145
 146         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 147         err |= put_user(stat->ino, &statbuf->st_ino);
 148         err |= put_user(stat->mode, &statbuf->st_mode);
 149         err |= put_user(stat->nlink, &statbuf->st_nlink);
 150         err |= put_user(stat->uid, &statbuf->st_uid);
 151         err |= put_user(stat->gid, &statbuf->st_gid);
 152         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 153         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 154         err |= put_user(stat->size, &statbuf->st_size);
 155         err |= put_user(stat->blksize, &statbuf->st_blksize);
 156         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 157         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 158         err |= put_user(stat->blocks, &statbuf->st_blocks);
 159         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 160         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 161         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 162         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 163         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 164         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 165         err |= put_user(0, &statbuf->__unused4);
 166         err |= put_user(0, &statbuf->__unused5);
 167
 168         return err;
 169 }
 170
 171 asmlinkage long compat_sys_stat64(char __user * filename,
 172                 struct compat_stat64 __user *statbuf)
 173 {
 174         struct kstat stat;
 175         int error = vfs_stat(filename, &stat);
 176
 177         if (!error)
 178                 error = cp_compat_stat64(&stat, statbuf);
 179         return error;
 180 }
 181
 182 asmlinkage long compat_sys_lstat64(char __user * filename,
 183                 struct compat_stat64 __user *statbuf)
 184 {
 185         struct kstat stat;
 186         int error = vfs_lstat(filename, &stat);
 187
 188         if (!error)
 189                 error = cp_compat_stat64(&stat, statbuf);
 190         return error;
 191 }
 192
 193 asmlinkage long compat_sys_fstat64(unsigned int fd,
 194                 struct compat_stat64 __user * statbuf)
 195 {
 196         struct kstat stat;
 197         int error = vfs_fstat(fd, &stat);
 198
 199         if (!error)
 200                 error = cp_compat_stat64(&stat, statbuf);
 201         return error;
 202 }
 203
 204 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
 205                 struct compat_stat64 __user * statbuf, int flag)
 206 {
 207         struct kstat stat;
 208         int error;
 209
 210         error = vfs_fstatat(dfd, filename, &stat, flag);
 211         if (error)
 212                 return error;
 213         return cp_compat_stat64(&stat, statbuf);
 214 }
 215
 216 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 217 {
 218         return sys_sysfs(option, arg1, arg2);
 219 }
 220
 221 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 222 {
 223         struct timespec t;
 224         int ret;
 225         mm_segment_t old_fs = get_fs ();
 226
 227         set_fs (KERNEL_DS);
 228         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 229         set_fs (old_fs);
 230         if (put_compat_timespec(&t, interval))
 231                 return -EFAULT;
 232         return ret;
 233 }
 234
 235 asmlinkage long compat_sys_rt_sigprocmask(int how,
 236                                           compat_sigset_t __user *set,
 237                                           compat_sigset_t __user *oset,
 238                                           compat_size_t sigsetsize)
 239 {
 240         sigset_t s;
 241         compat_sigset_t s32;
 242         int ret;
 243         mm_segment_t old_fs = get_fs();
 244
 245         if (set) {
 246                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 247                         return -EFAULT;
 248                 switch (_NSIG_WORDS) {
 249                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 250                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 251                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 252                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 253                 }
 254         }
 255         set_fs (KERNEL_DS);
 256         ret = sys_rt_sigprocmask(how,
 257                                  set ? (sigset_t __user *) &s : NULL,
 258                                  oset ? (sigset_t __user *) &s : NULL,
 259                                  sigsetsize);
 260         set_fs (old_fs);
 261         if (ret) return ret;
 262         if (oset) {
 263                 switch (_NSIG_WORDS) {
 264                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 265                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 266                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 267                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 268                 }
 269                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 270                         return -EFAULT;
 271         }
 272         return 0;
 273 }
 274
 275 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 276                                     compat_size_t sigsetsize)
 277 {
 278         sigset_t s;
 279         compat_sigset_t s32;
 280         int ret;
 281         mm_segment_t old_fs = get_fs();
 282
 283         set_fs (KERNEL_DS);
 284         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 285         set_fs (old_fs);
 286         if (!ret) {
 287                 switch (_NSIG_WORDS) {
 288                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 289                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 290                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 291                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 292                 }
 293                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 294                         return -EFAULT;
 295         }
 296         return ret;
 297 }
 298
 299 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 300                                            struct compat_siginfo __user *uinfo)
 301 {
 302         siginfo_t info;
 303         int ret;
 304         mm_segment_t old_fs = get_fs();
 305
 306         if (copy_siginfo_from_user32(&info, uinfo))
 307                 return -EFAULT;
 308
 309         set_fs (KERNEL_DS);
 310         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 311         set_fs (old_fs);
 312         return ret;
 313 }
 314
 315 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 316                                      struct old_sigaction32 __user *oact)
 317 {
 318         struct k_sigaction new_ka, old_ka;
 319         int ret;
 320
 321         WARN_ON_ONCE(sig >= 0);
 322         sig = -sig;
 323
 324         if (act) {
 325                 compat_old_sigset_t mask;
 326                 u32 u_handler, u_restorer;
 327
 328                 ret = get_user(u_handler, &act->sa_handler);
 329                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 330                 ret |= __get_user(u_restorer, &act->sa_restorer);
 331                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 332                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 333                 ret |= __get_user(mask, &act->sa_mask);
 334                 if (ret)
 335                         return ret;
 336                 new_ka.ka_restorer = NULL;
 337                 siginitset(&new_ka.sa.sa_mask, mask);
 338         }
 339
 340         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 341
 342         if (!ret && oact) {
 343                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 344                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 345                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 346                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 347         }
 348
 349         return ret;
 350 }
 351
 352 asmlinkage long compat_sys_rt_sigaction(int sig,
 353                                         struct sigaction32 __user *act,
 354                                         struct sigaction32 __user *oact,
 355                                         void __user *restorer,
 356                                         compat_size_t sigsetsize)
 357 {
 358         struct k_sigaction new_ka, old_ka;
 359         int ret;
 360         compat_sigset_t set32;
 361
 362         /* XXX: Don't preclude handling different sized sigset_t's.  */
 363         if (sigsetsize != sizeof(compat_sigset_t))
 364                 return -EINVAL;
 365
 366         if (act) {
 367                 u32 u_handler, u_restorer;
 368
 369                 new_ka.ka_restorer = restorer;
 370                 ret = get_user(u_handler, &act->sa_handler);
 371                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 372                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 373                 switch (_NSIG_WORDS) {
 374                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 375                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 376                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 377                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 378                 }
 379                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 380                 ret |= __get_user(u_restorer, &act->sa_restorer);
 381                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 382                 if (ret)
 383                         return -EFAULT;
 384         }
 385
 386         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 387
 388         if (!ret && oact) {
 389                 switch (_NSIG_WORDS) {
 390                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 391                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 392                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 393                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 394                 }
 395                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 396                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 397                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 398                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 399                 if (ret)
 400                         ret = -EFAULT;
 401         }
 402
 403         return ret;
 404 }
 405
 406 /*
 407  * sparc32_execve() executes a new program after the asm stub has set
 408  * things up for us.  This should basically do what I want it to.
 409  */
 410 asmlinkage long sparc32_execve(struct pt_regs *regs)
 411 {
 412         int error, base = 0;
 413         char *filename;
 414
 415         /* User register window flush is done by entry.S */
 416
 417         /* Check for indirect call. */
 418         if ((u32)regs->u_regs[UREG_G1] == 0)
 419                 base = 1;
 420
 421         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 422         error = PTR_ERR(filename);
 423         if (IS_ERR(filename))
 424                 goto out;
 425
 426         error = compat_do_execve(filename,
 427                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 428                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 429
 430         putname(filename);
 431
 432         if (!error) {
 433                 fprs_write(0);
 434                 current_thread_info()->xfsr[0] = 0;
 435                 current_thread_info()->fpsaved[0] = 0;
 436                 regs->tstate &= ~TSTATE_PEF;
 437         }
 438 out:
 439         return error;
 440 }
 441
 442 #ifdef CONFIG_MODULES
 443
 444 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 445                                   const char __user *uargs)
 446 {
 447         return sys_init_module(umod, len, uargs);
 448 }
 449
 450 asmlinkage long sys32_delete_module(const char __user *name_user,
 451                                     unsigned int flags)
 452 {
 453         return sys_delete_module(name_user, flags);
 454 }
 455
 456 #else /* CONFIG_MODULES */
 457
 458 asmlinkage long sys32_init_module(const char __user *name_user,
 459                                   struct module __user *mod_user)
 460 {
 461         return -ENOSYS;
 462 }
 463
 464 asmlinkage long sys32_delete_module(const char __user *name_user)
 465 {
 466         return -ENOSYS;
 467 }
 468
 469 #endif  /* CONFIG_MODULES */
 470
 471 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 472                                         char __user *ubuf,
 473                                         compat_size_t count,
 474                                         unsigned long poshi,
 475                                         unsigned long poslo)
 476 {
 477         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 478 }
 479
 480 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 481                                          char __user *ubuf,
 482                                          compat_size_t count,
 483                                          unsigned long poshi,
 484                                          unsigned long poslo)
 485 {
 486         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 487 }
 488
 489 asmlinkage long compat_sys_readahead(int fd,
 490                                      unsigned long offhi,
 491                                      unsigned long offlo,
 492                                      compat_size_t count)
 493 {
 494         return sys_readahead(fd, (offhi << 32) | offlo, count);
 495 }
 496
 497 long compat_sys_fadvise64(int fd,
 498                           unsigned long offhi,
 499                           unsigned long offlo,
 500                           compat_size_t len, int advice)
 501 {
 502         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 503 }
 504
 505 long compat_sys_fadvise64_64(int fd,
 506                              unsigned long offhi, unsigned long offlo,
 507                              unsigned long lenhi, unsigned long lenlo,
 508                              int advice)
 509 {
 510         return sys_fadvise64_64(fd,
 511                                 (offhi << 32) | offlo,
 512                                 (lenhi << 32) | lenlo,
 513                                 advice);
 514 }
 515
 516 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 517                                     compat_off_t __user *offset,
 518                                     compat_size_t count)
 519 {
 520         mm_segment_t old_fs = get_fs();
 521         int ret;
 522         off_t of;
 523
 524         if (offset && get_user(of, offset))
 525                 return -EFAULT;
 526
 527         set_fs(KERNEL_DS);
 528         ret = sys_sendfile(out_fd, in_fd,
 529                            offset ? (off_t __user *) &of : NULL,
 530                            count);
 531         set_fs(old_fs);
 532
 533         if (offset && put_user(of, offset))
 534                 return -EFAULT;
 535
 536         return ret;
 537 }
 538
 539 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 540                                       compat_loff_t __user *offset,
 541                                       compat_size_t count)
 542 {
 543         mm_segment_t old_fs = get_fs();
 544         int ret;
 545         loff_t lof;
 546
 547         if (offset && get_user(lof, offset))
 548                 return -EFAULT;
 549
 550         set_fs(KERNEL_DS);
 551         ret = sys_sendfile64(out_fd, in_fd,
 552                              offset ? (loff_t __user *) &lof : NULL,
 553                              count);
 554         set_fs(old_fs);
 555
 556         if (offset && put_user(lof, offset))
 557                 return -EFAULT;
 558
 559         return ret;
 560 }
 561
 562 /* This is just a version for 32-bit applications which does
 563  * not force O_LARGEFILE on.
 564  */
 565
 566 asmlinkage long sparc32_open(const char __user *filename,
 567                              int flags, int mode)
 568 {
 569         return do_sys_open(AT_FDCWD, filename, flags, mode);
 570 }
 571
 572 extern unsigned long do_mremap(unsigned long addr,
 573         unsigned long old_len, unsigned long new_len,
 574         unsigned long flags, unsigned long new_addr);
 575
 576 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 577         unsigned long old_len, unsigned long new_len,
 578         unsigned long flags, u32 __new_addr)
 579 {
 580         unsigned long ret = -EINVAL;
 581         unsigned long new_addr = __new_addr;
 582
 583         if (unlikely(sparc_mmap_check(addr, old_len)))
 584                 goto out;
 585         if (unlikely(sparc_mmap_check(new_addr, new_len)))
 586                 goto out;
 587         down_write(&current->mm->mmap_sem);
 588         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
 589         up_write(&current->mm->mmap_sem);
 590 out:
 591         return ret;
 592 }
 593
 594 struct __sysctl_args32 {
 595         u32 name;
 596         int nlen;
 597         u32 oldval;
 598         u32 oldlenp;
 599         u32 newval;
 600         u32 newlen;
 601         u32 __unused[4];
 602 };
 603
 604 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 605 {
 606 #ifndef CONFIG_SYSCTL_SYSCALL
 607         return -ENOSYS;
 608 #else
 609         struct __sysctl_args32 tmp;
 610         int error;
 611         size_t oldlen, __user *oldlenp = NULL;
 612         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
 613
 614         if (copy_from_user(&tmp, args, sizeof(tmp)))
 615                 return -EFAULT;
 616
 617         if (tmp.oldval && tmp.oldlenp) {
 618                 /* Duh, this is ugly and might not work if sysctl_args
 619                    is in read-only memory, but do_sysctl does indirectly
 620                    a lot of uaccess in both directions and we'd have to
 621                    basically copy the whole sysctl.c here, and
 622                    glibc's __sysctl uses rw memory for the structure
 623                    anyway.  */
 624                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
 625                     put_user(oldlen, (size_t __user *)addr))
 626                         return -EFAULT;
 627                 oldlenp = (size_t __user *)addr;
 628         }
 629
 630         lock_kernel();
 631         error = do_sysctl((int __user *)(unsigned long) tmp.name,
 632                           tmp.nlen,
 633                           (void __user *)(unsigned long) tmp.oldval,
 634                           oldlenp,
 635                           (void __user *)(unsigned long) tmp.newval,
 636                           tmp.newlen);
 637         unlock_kernel();
 638         if (oldlenp) {
 639                 if (!error) {
 640                         if (get_user(oldlen, (size_t __user *)addr) ||
 641                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
 642                                 error = -EFAULT;
 643                 }
 644                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
 645                         error = -EFAULT;
 646         }
 647         return error;
 648 #endif
 649 }
 650
 651 long sys32_lookup_dcookie(unsigned long cookie_high,
 652                           unsigned long cookie_low,
 653                           char __user *buf, size_t len)
 654 {
 655         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
 656                                   buf, len);
 657 }
 658
 659 long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
 660 {
 661         return sys_sync_file_range(fd,
 662                                    (off_high << 32) | off_low,
 663                                    (nb_high << 32) | nb_low,
 664                                    flags);
 665 }
 666
 667 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 668                                      u32 lenhi, u32 lenlo)
 669 {
 670         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 671                              ((loff_t)lenhi << 32) | lenlo);
 672 }