arch/sparc64/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/utsname.h>
  20 #include <linux/smp.h>
  21 #include <linux/smp_lock.h>
  22 #include <linux/sem.h>
  23 #include <linux/msg.h>
  24 #include <linux/shm.h>
  25 #include <linux/slab.h>
  26 #include <linux/uio.h>
  27 #include <linux/nfs_fs.h>
  28 #include <linux/quota.h>
  29 #include <linux/module.h>
  30 #include <linux/sunrpc/svc.h>
  31 #include <linux/nfsd/nfsd.h>
  32 #include <linux/nfsd/cache.h>
  33 #include <linux/nfsd/xdr.h>
  34 #include <linux/nfsd/syscall.h>
  35 #include <linux/poll.h>
  36 #include <linux/personality.h>
  37 #include <linux/stat.h>
  38 #include <linux/filter.h>
  39 #include <linux/highmem.h>
  40 #include <linux/highuid.h>
  41 #include <linux/mman.h>
  42 #include <linux/ipv6.h>
  43 #include <linux/in.h>
  44 #include <linux/icmpv6.h>
  45 #include <linux/syscalls.h>
  46 #include <linux/sysctl.h>
  47 #include <linux/binfmts.h>
  48 #include <linux/dnotify.h>
  49 #include <linux/security.h>
  50 #include <linux/compat.h>
  51 #include <linux/vfs.h>
  52 #include <linux/netfilter_ipv4/ip_tables.h>
  53 #include <linux/ptrace.h>
  54
  55 #include <asm/types.h>
  56 #include <asm/uaccess.h>
  57 #include <asm/fpumacro.h>
  58 #include <asm/mmu_context.h>
  59 #include <asm/compat_signal.h>
  60
  61 /* 32-bit timeval and related flotsam.  */
  62
  63 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
  64 {
  65         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
  66                 (__put_user(i->tv_sec, &o->tv_sec) |
  67                  __put_user(i->tv_usec, &o->tv_usec)));
  68 }
  69
  70 #ifdef CONFIG_SYSVIPC
  71 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
  72 {
  73         int version;
  74
  75         version = call >> 16; /* hack for backward compatibility */
  76         call &= 0xffff;
  77
  78         switch (call) {
  79         case SEMTIMEDOP:
  80                 if (fifth)
  81                         /* sign extend semid */
  82                         return compat_sys_semtimedop((int)first,
  83                                                      compat_ptr(ptr), second,
  84                                                      compat_ptr(fifth));
  85                 /* else fall through for normal semop() */
  86         case SEMOP:
  87                 /* struct sembuf is the same on 32 and 64bit :)) */
  88                 /* sign extend semid */
  89                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
  90                                       NULL);
  91         case SEMGET:
  92                 /* sign extend key, nsems */
  93                 return sys_semget((int)first, (int)second, third);
  94         case SEMCTL:
  95                 /* sign extend semid, semnum */
  96                 return compat_sys_semctl((int)first, (int)second, third,
  97                                          compat_ptr(ptr));
  98
  99         case MSGSND:
 100                 /* sign extend msqid */
 101                 return compat_sys_msgsnd((int)first, (int)second, third,
 102                                          compat_ptr(ptr));
 103         case MSGRCV:
 104                 /* sign extend msqid, msgtyp */
 105                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 106                                          third, version, compat_ptr(ptr));
 107         case MSGGET:
 108                 /* sign extend key */
 109                 return sys_msgget((int)first, second);
 110         case MSGCTL:
 111                 /* sign extend msqid */
 112                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 113
 114         case SHMAT:
 115                 /* sign extend shmid */
 116                 return compat_sys_shmat((int)first, second, third, version,
 117                                         compat_ptr(ptr));
 118         case SHMDT:
 119                 return sys_shmdt(compat_ptr(ptr));
 120         case SHMGET:
 121                 /* sign extend key_t */
 122                 return sys_shmget((int)first, second, third);
 123         case SHMCTL:
 124                 /* sign extend shmid */
 125                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 126
 127         default:
 128                 return -ENOSYS;
 129         };
 130
 131         return -ENOSYS;
 132 }
 133 #endif
 134
 135 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 136 {
 137         if ((int)high < 0)
 138                 return -EINVAL;
 139         else
 140                 return sys_truncate(path, (high << 32) | low);
 141 }
 142
 143 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 144 {
 145         if ((int)high < 0)
 146                 return -EINVAL;
 147         else
 148                 return sys_ftruncate(fd, (high << 32) | low);
 149 }
 150
 151 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 152 {
 153         compat_ino_t ino;
 154         int err;
 155
 156         if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
 157             !old_valid_dev(stat->rdev))
 158                 return -EOVERFLOW;
 159
 160         ino = stat->ino;
 161         if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
 162                 return -EOVERFLOW;
 163
 164         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 165         err |= put_user(stat->ino, &statbuf->st_ino);
 166         err |= put_user(stat->mode, &statbuf->st_mode);
 167         err |= put_user(stat->nlink, &statbuf->st_nlink);
 168         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 169         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 170         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 171         err |= put_user(stat->size, &statbuf->st_size);
 172         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 173         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 174         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 175         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 176         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 177         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 178         err |= put_user(stat->blksize, &statbuf->st_blksize);
 179         err |= put_user(stat->blocks, &statbuf->st_blocks);
 180         err |= put_user(0, &statbuf->__unused4[0]);
 181         err |= put_user(0, &statbuf->__unused4[1]);
 182
 183         return err;
 184 }
 185
 186 static int cp_compat_stat64(struct kstat *stat,
 187                             struct compat_stat64 __user *statbuf)
 188 {
 189         int err;
 190
 191         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 192         err |= put_user(stat->ino, &statbuf->st_ino);
 193         err |= put_user(stat->mode, &statbuf->st_mode);
 194         err |= put_user(stat->nlink, &statbuf->st_nlink);
 195         err |= put_user(stat->uid, &statbuf->st_uid);
 196         err |= put_user(stat->gid, &statbuf->st_gid);
 197         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 198         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 199         err |= put_user(stat->size, &statbuf->st_size);
 200         err |= put_user(stat->blksize, &statbuf->st_blksize);
 201         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 202         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 203         err |= put_user(stat->blocks, &statbuf->st_blocks);
 204         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 205         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 206         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 207         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 208         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 209         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 210         err |= put_user(0, &statbuf->__unused4);
 211         err |= put_user(0, &statbuf->__unused5);
 212
 213         return err;
 214 }
 215
 216 asmlinkage long compat_sys_stat64(char __user * filename,
 217                 struct compat_stat64 __user *statbuf)
 218 {
 219         struct kstat stat;
 220         int error = vfs_stat(filename, &stat);
 221
 222         if (!error)
 223                 error = cp_compat_stat64(&stat, statbuf);
 224         return error;
 225 }
 226
 227 asmlinkage long compat_sys_lstat64(char __user * filename,
 228                 struct compat_stat64 __user *statbuf)
 229 {
 230         struct kstat stat;
 231         int error = vfs_lstat(filename, &stat);
 232
 233         if (!error)
 234                 error = cp_compat_stat64(&stat, statbuf);
 235         return error;
 236 }
 237
 238 asmlinkage long compat_sys_fstat64(unsigned int fd,
 239                 struct compat_stat64 __user * statbuf)
 240 {
 241         struct kstat stat;
 242         int error = vfs_fstat(fd, &stat);
 243
 244         if (!error)
 245                 error = cp_compat_stat64(&stat, statbuf);
 246         return error;
 247 }
 248
 249 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
 250                 struct compat_stat64 __user * statbuf, int flag)
 251 {
 252         struct kstat stat;
 253         int error = -EINVAL;
 254
 255         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 256                 goto out;
 257
 258         if (flag & AT_SYMLINK_NOFOLLOW)
 259                 error = vfs_lstat_fd(dfd, filename, &stat);
 260         else
 261                 error = vfs_stat_fd(dfd, filename, &stat);
 262
 263         if (!error)
 264                 error = cp_compat_stat64(&stat, statbuf);
 265
 266 out:
 267         return error;
 268 }
 269
 270 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 271 {
 272         return sys_sysfs(option, arg1, arg2);
 273 }
 274
 275 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 276 {
 277         struct timespec t;
 278         int ret;
 279         mm_segment_t old_fs = get_fs ();
 280
 281         set_fs (KERNEL_DS);
 282         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 283         set_fs (old_fs);
 284         if (put_compat_timespec(&t, interval))
 285                 return -EFAULT;
 286         return ret;
 287 }
 288
 289 asmlinkage long compat_sys_rt_sigprocmask(int how,
 290                                           compat_sigset_t __user *set,
 291                                           compat_sigset_t __user *oset,
 292                                           compat_size_t sigsetsize)
 293 {
 294         sigset_t s;
 295         compat_sigset_t s32;
 296         int ret;
 297         mm_segment_t old_fs = get_fs();
 298
 299         if (set) {
 300                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 301                         return -EFAULT;
 302                 switch (_NSIG_WORDS) {
 303                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 304                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 305                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 306                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 307                 }
 308         }
 309         set_fs (KERNEL_DS);
 310         ret = sys_rt_sigprocmask(how,
 311                                  set ? (sigset_t __user *) &s : NULL,
 312                                  oset ? (sigset_t __user *) &s : NULL,
 313                                  sigsetsize);
 314         set_fs (old_fs);
 315         if (ret) return ret;
 316         if (oset) {
 317                 switch (_NSIG_WORDS) {
 318                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 319                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 320                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 321                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 322                 }
 323                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 324                         return -EFAULT;
 325         }
 326         return 0;
 327 }
 328
 329 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 330                                     compat_size_t sigsetsize)
 331 {
 332         sigset_t s;
 333         compat_sigset_t s32;
 334         int ret;
 335         mm_segment_t old_fs = get_fs();
 336
 337         set_fs (KERNEL_DS);
 338         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 339         set_fs (old_fs);
 340         if (!ret) {
 341                 switch (_NSIG_WORDS) {
 342                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 343                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 344                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 345                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 346                 }
 347                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 348                         return -EFAULT;
 349         }
 350         return ret;
 351 }
 352
 353 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 354                                            struct compat_siginfo __user *uinfo)
 355 {
 356         siginfo_t info;
 357         int ret;
 358         mm_segment_t old_fs = get_fs();
 359
 360         if (copy_siginfo_from_user32(&info, uinfo))
 361                 return -EFAULT;
 362
 363         set_fs (KERNEL_DS);
 364         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 365         set_fs (old_fs);
 366         return ret;
 367 }
 368
 369 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 370                                      struct old_sigaction32 __user *oact)
 371 {
 372         struct k_sigaction new_ka, old_ka;
 373         int ret;
 374
 375         WARN_ON_ONCE(sig >= 0);
 376         sig = -sig;
 377
 378         if (act) {
 379                 compat_old_sigset_t mask;
 380                 u32 u_handler, u_restorer;
 381
 382                 ret = get_user(u_handler, &act->sa_handler);
 383                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 384                 ret |= __get_user(u_restorer, &act->sa_restorer);
 385                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 386                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 387                 ret |= __get_user(mask, &act->sa_mask);
 388                 if (ret)
 389                         return ret;
 390                 new_ka.ka_restorer = NULL;
 391                 siginitset(&new_ka.sa.sa_mask, mask);
 392         }
 393
 394         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 395
 396         if (!ret && oact) {
 397                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 398                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 399                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 400                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 401         }
 402
 403         return ret;
 404 }
 405
 406 asmlinkage long compat_sys_rt_sigaction(int sig,
 407                                         struct sigaction32 __user *act,
 408                                         struct sigaction32 __user *oact,
 409                                         void __user *restorer,
 410                                         compat_size_t sigsetsize)
 411 {
 412         struct k_sigaction new_ka, old_ka;
 413         int ret;
 414         compat_sigset_t set32;
 415
 416         /* XXX: Don't preclude handling different sized sigset_t's.  */
 417         if (sigsetsize != sizeof(compat_sigset_t))
 418                 return -EINVAL;
 419
 420         if (act) {
 421                 u32 u_handler, u_restorer;
 422
 423                 new_ka.ka_restorer = restorer;
 424                 ret = get_user(u_handler, &act->sa_handler);
 425                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 426                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 427                 switch (_NSIG_WORDS) {
 428                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 429                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 430                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 431                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 432                 }
 433                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 434                 ret |= __get_user(u_restorer, &act->sa_restorer);
 435                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 436                 if (ret)
 437                         return -EFAULT;
 438         }
 439
 440         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 441
 442         if (!ret && oact) {
 443                 switch (_NSIG_WORDS) {
 444                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 445                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 446                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 447                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 448                 }
 449                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 450                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 451                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 452                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 453                 if (ret)
 454                         ret = -EFAULT;
 455         }
 456
 457         return ret;
 458 }
 459
 460 /*
 461  * sparc32_execve() executes a new program after the asm stub has set
 462  * things up for us.  This should basically do what I want it to.
 463  */
 464 asmlinkage long sparc32_execve(struct pt_regs *regs)
 465 {
 466         int error, base = 0;
 467         char *filename;
 468
 469         /* User register window flush is done by entry.S */
 470
 471         /* Check for indirect call. */
 472         if ((u32)regs->u_regs[UREG_G1] == 0)
 473                 base = 1;
 474
 475         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 476         error = PTR_ERR(filename);
 477         if (IS_ERR(filename))
 478                 goto out;
 479
 480         error = compat_do_execve(filename,
 481                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 482                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 483
 484         putname(filename);
 485
 486         if (!error) {
 487                 fprs_write(0);
 488                 current_thread_info()->xfsr[0] = 0;
 489                 current_thread_info()->fpsaved[0] = 0;
 490                 regs->tstate &= ~TSTATE_PEF;
 491         }
 492 out:
 493         return error;
 494 }
 495
 496 #ifdef CONFIG_MODULES
 497
 498 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 499                                   const char __user *uargs)
 500 {
 501         return sys_init_module(umod, len, uargs);
 502 }
 503
 504 asmlinkage long sys32_delete_module(const char __user *name_user,
 505                                     unsigned int flags)
 506 {
 507         return sys_delete_module(name_user, flags);
 508 }
 509
 510 #else /* CONFIG_MODULES */
 511
 512 asmlinkage long sys32_init_module(const char __user *name_user,
 513                                   struct module __user *mod_user)
 514 {
 515         return -ENOSYS;
 516 }
 517
 518 asmlinkage long sys32_delete_module(const char __user *name_user)
 519 {
 520         return -ENOSYS;
 521 }
 522
 523 #endif  /* CONFIG_MODULES */
 524
 525 /* Translations due to time_t size differences.  Which affects all
 526    sorts of things, like timeval and itimerval.  */
 527
 528 extern struct timezone sys_tz;
 529
 530 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 531                                    struct timezone __user *tz)
 532 {
 533         if (tv) {
 534                 struct timeval ktv;
 535                 do_gettimeofday(&ktv);
 536                 if (put_tv32(tv, &ktv))
 537                         return -EFAULT;
 538         }
 539         if (tz) {
 540                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 541                         return -EFAULT;
 542         }
 543         return 0;
 544 }
 545
 546 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 547 {
 548         long usec;
 549
 550         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 551                 return -EFAULT;
 552         if (__get_user(o->tv_sec, &i->tv_sec))
 553                 return -EFAULT;
 554         if (__get_user(usec, &i->tv_usec))
 555                 return -EFAULT;
 556         o->tv_nsec = usec * 1000;
 557         return 0;
 558 }
 559
 560 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 561                                    struct timezone __user *tz)
 562 {
 563         struct timespec kts;
 564         struct timezone ktz;
 565
 566         if (tv) {
 567                 if (get_ts32(&kts, tv))
 568                         return -EFAULT;
 569         }
 570         if (tz) {
 571                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 572                         return -EFAULT;
 573         }
 574
 575         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 576 }
 577
 578 /* These are here just in case some old sparc32 binary calls it. */
 579 asmlinkage long sys32_pause(void)
 580 {
 581         current->state = TASK_INTERRUPTIBLE;
 582         schedule();
 583         return -ERESTARTNOHAND;
 584 }
 585
 586 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 587                                         char __user *ubuf,
 588                                         compat_size_t count,
 589                                         unsigned long poshi,
 590                                         unsigned long poslo)
 591 {
 592         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 593 }
 594
 595 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 596                                          char __user *ubuf,
 597                                          compat_size_t count,
 598                                          unsigned long poshi,
 599                                          unsigned long poslo)
 600 {
 601         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 602 }
 603
 604 asmlinkage long compat_sys_readahead(int fd,
 605                                      unsigned long offhi,
 606                                      unsigned long offlo,
 607                                      compat_size_t count)
 608 {
 609         return sys_readahead(fd, (offhi << 32) | offlo, count);
 610 }
 611
 612 long compat_sys_fadvise64(int fd,
 613                           unsigned long offhi,
 614                           unsigned long offlo,
 615                           compat_size_t len, int advice)
 616 {
 617         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 618 }
 619
 620 long compat_sys_fadvise64_64(int fd,
 621                              unsigned long offhi, unsigned long offlo,
 622                              unsigned long lenhi, unsigned long lenlo,
 623                              int advice)
 624 {
 625         return sys_fadvise64_64(fd,
 626                                 (offhi << 32) | offlo,
 627                                 (lenhi << 32) | lenlo,
 628                                 advice);
 629 }
 630
 631 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 632                                     compat_off_t __user *offset,
 633                                     compat_size_t count)
 634 {
 635         mm_segment_t old_fs = get_fs();
 636         int ret;
 637         off_t of;
 638
 639         if (offset && get_user(of, offset))
 640                 return -EFAULT;
 641
 642         set_fs(KERNEL_DS);
 643         ret = sys_sendfile(out_fd, in_fd,
 644                            offset ? (off_t __user *) &of : NULL,
 645                            count);
 646         set_fs(old_fs);
 647
 648         if (offset && put_user(of, offset))
 649                 return -EFAULT;
 650
 651         return ret;
 652 }
 653
 654 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 655                                       compat_loff_t __user *offset,
 656                                       compat_size_t count)
 657 {
 658         mm_segment_t old_fs = get_fs();
 659         int ret;
 660         loff_t lof;
 661
 662         if (offset && get_user(lof, offset))
 663                 return -EFAULT;
 664
 665         set_fs(KERNEL_DS);
 666         ret = sys_sendfile64(out_fd, in_fd,
 667                              offset ? (loff_t __user *) &lof : NULL,
 668                              count);
 669         set_fs(old_fs);
 670
 671         if (offset && put_user(lof, offset))
 672                 return -EFAULT;
 673
 674         return ret;
 675 }
 676
 677 /* This is just a version for 32-bit applications which does
 678  * not force O_LARGEFILE on.
 679  */
 680
 681 asmlinkage long sparc32_open(const char __user *filename,
 682                              int flags, int mode)
 683 {
 684         return do_sys_open(AT_FDCWD, filename, flags, mode);
 685 }
 686
 687 extern unsigned long do_mremap(unsigned long addr,
 688         unsigned long old_len, unsigned long new_len,
 689         unsigned long flags, unsigned long new_addr);
 690
 691 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 692         unsigned long old_len, unsigned long new_len,
 693         unsigned long flags, u32 __new_addr)
 694 {
 695         unsigned long ret = -EINVAL;
 696         unsigned long new_addr = __new_addr;
 697
 698         if (unlikely(sparc_mmap_check(addr, old_len)))
 699                 goto out;
 700         if (unlikely(sparc_mmap_check(new_addr, new_len)))
 701                 goto out;
 702         down_write(&current->mm->mmap_sem);
 703         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
 704         up_write(&current->mm->mmap_sem);
 705 out:
 706         return ret;
 707 }
 708
 709 struct __sysctl_args32 {
 710         u32 name;
 711         int nlen;
 712         u32 oldval;
 713         u32 oldlenp;
 714         u32 newval;
 715         u32 newlen;
 716         u32 __unused[4];
 717 };
 718
 719 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 720 {
 721 #ifndef CONFIG_SYSCTL_SYSCALL
 722         return -ENOSYS;
 723 #else
 724         struct __sysctl_args32 tmp;
 725         int error;
 726         size_t oldlen, __user *oldlenp = NULL;
 727         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
 728
 729         if (copy_from_user(&tmp, args, sizeof(tmp)))
 730                 return -EFAULT;
 731
 732         if (tmp.oldval && tmp.oldlenp) {
 733                 /* Duh, this is ugly and might not work if sysctl_args
 734                    is in read-only memory, but do_sysctl does indirectly
 735                    a lot of uaccess in both directions and we'd have to
 736                    basically copy the whole sysctl.c here, and
 737                    glibc's __sysctl uses rw memory for the structure
 738                    anyway.  */
 739                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
 740                     put_user(oldlen, (size_t __user *)addr))
 741                         return -EFAULT;
 742                 oldlenp = (size_t __user *)addr;
 743         }
 744
 745         lock_kernel();
 746         error = do_sysctl((int __user *)(unsigned long) tmp.name,
 747                           tmp.nlen,
 748                           (void __user *)(unsigned long) tmp.oldval,
 749                           oldlenp,
 750                           (void __user *)(unsigned long) tmp.newval,
 751                           tmp.newlen);
 752         unlock_kernel();
 753         if (oldlenp) {
 754                 if (!error) {
 755                         if (get_user(oldlen, (size_t __user *)addr) ||
 756                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
 757                                 error = -EFAULT;
 758                 }
 759                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
 760                         error = -EFAULT;
 761         }
 762         return error;
 763 #endif
 764 }
 765
 766 long sys32_lookup_dcookie(unsigned long cookie_high,
 767                           unsigned long cookie_low,
 768                           char __user *buf, size_t len)
 769 {
 770         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
 771                                   buf, len);
 772 }
 773
 774 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)
 775 {
 776         return sys_sync_file_range(fd,
 777                                    (off_high << 32) | off_low,
 778                                    (nb_high << 32) | nb_low,
 779                                    flags);
 780 }
 781
 782 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 783                                      u32 lenhi, u32 lenlo)
 784 {
 785         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 786                              ((loff_t)lenhi << 32) | lenlo);
 787 }