arch/sparc64/kernel/sys_sparc32.c

   1 /* $Id: sys_sparc32.c,v 1.184 2002/02/09 19:49:31 davem Exp $
   2  * sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   6  *
   7  * These routines maintain argument size conversion between 32bit and 64bit
   8  * environment.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/sched.h>
  13 #include <linux/capability.h>
  14 #include <linux/fs.h>
  15 #include <linux/mm.h>
  16 #include <linux/file.h>
  17 #include <linux/signal.h>
  18 #include <linux/resource.h>
  19 #include <linux/times.h>
  20 #include <linux/utsname.h>
  21 #include <linux/smp.h>
  22 #include <linux/smp_lock.h>
  23 #include <linux/sem.h>
  24 #include <linux/msg.h>
  25 #include <linux/shm.h>
  26 #include <linux/slab.h>
  27 #include <linux/uio.h>
  28 #include <linux/nfs_fs.h>
  29 #include <linux/quota.h>
  30 #include <linux/module.h>
  31 #include <linux/sunrpc/svc.h>
  32 #include <linux/nfsd/nfsd.h>
  33 #include <linux/nfsd/cache.h>
  34 #include <linux/nfsd/xdr.h>
  35 #include <linux/nfsd/syscall.h>
  36 #include <linux/poll.h>
  37 #include <linux/personality.h>
  38 #include <linux/stat.h>
  39 #include <linux/filter.h>
  40 #include <linux/highmem.h>
  41 #include <linux/highuid.h>
  42 #include <linux/mman.h>
  43 #include <linux/ipv6.h>
  44 #include <linux/in.h>
  45 #include <linux/icmpv6.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/sysctl.h>
  48 #include <linux/binfmts.h>
  49 #include <linux/dnotify.h>
  50 #include <linux/security.h>
  51 #include <linux/compat.h>
  52 #include <linux/vfs.h>
  53 #include <linux/netfilter_ipv4/ip_tables.h>
  54 #include <linux/ptrace.h>
  55 #include <linux/highuid.h>
  56
  57 #include <asm/types.h>
  58 #include <asm/ipc.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/fpumacro.h>
  61 #include <asm/semaphore.h>
  62 #include <asm/mmu_context.h>
  63 #include <asm/a.out.h>
  64 #include <asm/compat_signal.h>
  65
  66 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
  67 {
  68         return sys_chown(filename, low2highuid(user), low2highgid(group));
  69 }
  70
  71 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
  72 {
  73         return sys_lchown(filename, low2highuid(user), low2highgid(group));
  74 }
  75
  76 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
  77 {
  78         return sys_fchown(fd, low2highuid(user), low2highgid(group));
  79 }
  80
  81 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
  82 {
  83         return sys_setregid(low2highgid(rgid), low2highgid(egid));
  84 }
  85
  86 asmlinkage long sys32_setgid16(u16 gid)
  87 {
  88         return sys_setgid((gid_t)gid);
  89 }
  90
  91 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
  92 {
  93         return sys_setreuid(low2highuid(ruid), low2highuid(euid));
  94 }
  95
  96 asmlinkage long sys32_setuid16(u16 uid)
  97 {
  98         return sys_setuid((uid_t)uid);
  99 }
 100
 101 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
 102 {
 103         return sys_setresuid(low2highuid(ruid), low2highuid(euid),
 104                 low2highuid(suid));
 105 }
 106
 107 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
 108 {
 109         int retval;
 110
 111         if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
 112             !(retval = put_user(high2lowuid(current->euid), euid)))
 113                 retval = put_user(high2lowuid(current->suid), suid);
 114
 115         return retval;
 116 }
 117
 118 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
 119 {
 120         return sys_setresgid(low2highgid(rgid), low2highgid(egid),
 121                 low2highgid(sgid));
 122 }
 123
 124 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
 125 {
 126         int retval;
 127
 128         if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
 129             !(retval = put_user(high2lowgid(current->egid), egid)))
 130                 retval = put_user(high2lowgid(current->sgid), sgid);
 131
 132         return retval;
 133 }
 134
 135 asmlinkage long sys32_setfsuid16(u16 uid)
 136 {
 137         return sys_setfsuid((uid_t)uid);
 138 }
 139
 140 asmlinkage long sys32_setfsgid16(u16 gid)
 141 {
 142         return sys_setfsgid((gid_t)gid);
 143 }
 144
 145 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
 146 {
 147         int i;
 148         u16 group;
 149
 150         for (i = 0; i < group_info->ngroups; i++) {
 151                 group = (u16)GROUP_AT(group_info, i);
 152                 if (put_user(group, grouplist+i))
 153                         return -EFAULT;
 154         }
 155
 156         return 0;
 157 }
 158
 159 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
 160 {
 161         int i;
 162         u16 group;
 163
 164         for (i = 0; i < group_info->ngroups; i++) {
 165                 if (get_user(group, grouplist+i))
 166                         return  -EFAULT;
 167                 GROUP_AT(group_info, i) = (gid_t)group;
 168         }
 169
 170         return 0;
 171 }
 172
 173 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
 174 {
 175         int i;
 176
 177         if (gidsetsize < 0)
 178                 return -EINVAL;
 179
 180         get_group_info(current->group_info);
 181         i = current->group_info->ngroups;
 182         if (gidsetsize) {
 183                 if (i > gidsetsize) {
 184                         i = -EINVAL;
 185                         goto out;
 186                 }
 187                 if (groups16_to_user(grouplist, current->group_info)) {
 188                         i = -EFAULT;
 189                         goto out;
 190                 }
 191         }
 192 out:
 193         put_group_info(current->group_info);
 194         return i;
 195 }
 196
 197 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 198 {
 199         struct group_info *group_info;
 200         int retval;
 201
 202         if (!capable(CAP_SETGID))
 203                 return -EPERM;
 204         if ((unsigned)gidsetsize > NGROUPS_MAX)
 205                 return -EINVAL;
 206
 207         group_info = groups_alloc(gidsetsize);
 208         if (!group_info)
 209                 return -ENOMEM;
 210         retval = groups16_from_user(group_info, grouplist);
 211         if (retval) {
 212                 put_group_info(group_info);
 213                 return retval;
 214         }
 215
 216         retval = set_current_groups(group_info);
 217         put_group_info(group_info);
 218
 219         return retval;
 220 }
 221
 222 asmlinkage long sys32_getuid16(void)
 223 {
 224         return high2lowuid(current->uid);
 225 }
 226
 227 asmlinkage long sys32_geteuid16(void)
 228 {
 229         return high2lowuid(current->euid);
 230 }
 231
 232 asmlinkage long sys32_getgid16(void)
 233 {
 234         return high2lowgid(current->gid);
 235 }
 236
 237 asmlinkage long sys32_getegid16(void)
 238 {
 239         return high2lowgid(current->egid);
 240 }
 241
 242 /* 32-bit timeval and related flotsam.  */
 243
 244 static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
 245 {
 246         return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
 247                 (__get_user(o->tv_sec, &i->tv_sec) |
 248                  __get_user(o->tv_usec, &i->tv_usec)));
 249 }
 250
 251 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 252 {
 253         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 254                 (__put_user(i->tv_sec, &o->tv_sec) |
 255                  __put_user(i->tv_usec, &o->tv_usec)));
 256 }
 257
 258 #ifdef CONFIG_SYSVIPC
 259 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
 260 {
 261         int version;
 262
 263         version = call >> 16; /* hack for backward compatibility */
 264         call &= 0xffff;
 265
 266         switch (call) {
 267         case SEMTIMEDOP:
 268                 if (fifth)
 269                         /* sign extend semid */
 270                         return compat_sys_semtimedop((int)first,
 271                                                      compat_ptr(ptr), second,
 272                                                      compat_ptr(fifth));
 273                 /* else fall through for normal semop() */
 274         case SEMOP:
 275                 /* struct sembuf is the same on 32 and 64bit :)) */
 276                 /* sign extend semid */
 277                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 278                                       NULL);
 279         case SEMGET:
 280                 /* sign extend key, nsems */
 281                 return sys_semget((int)first, (int)second, third);
 282         case SEMCTL:
 283                 /* sign extend semid, semnum */
 284                 return compat_sys_semctl((int)first, (int)second, third,
 285                                          compat_ptr(ptr));
 286
 287         case MSGSND:
 288                 /* sign extend msqid */
 289                 return compat_sys_msgsnd((int)first, (int)second, third,
 290                                          compat_ptr(ptr));
 291         case MSGRCV:
 292                 /* sign extend msqid, msgtyp */
 293                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 294                                          third, version, compat_ptr(ptr));
 295         case MSGGET:
 296                 /* sign extend key */
 297                 return sys_msgget((int)first, second);
 298         case MSGCTL:
 299                 /* sign extend msqid */
 300                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 301
 302         case SHMAT:
 303                 /* sign extend shmid */
 304                 return compat_sys_shmat((int)first, second, third, version,
 305                                         compat_ptr(ptr));
 306         case SHMDT:
 307                 return sys_shmdt(compat_ptr(ptr));
 308         case SHMGET:
 309                 /* sign extend key_t */
 310                 return sys_shmget((int)first, second, third);
 311         case SHMCTL:
 312                 /* sign extend shmid */
 313                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 314
 315         default:
 316                 return -ENOSYS;
 317         };
 318
 319         return -ENOSYS;
 320 }
 321 #endif
 322
 323 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 324 {
 325         if ((int)high < 0)
 326                 return -EINVAL;
 327         else
 328                 return sys_truncate(path, (high << 32) | low);
 329 }
 330
 331 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 332 {
 333         if ((int)high < 0)
 334                 return -EINVAL;
 335         else
 336                 return sys_ftruncate(fd, (high << 32) | low);
 337 }
 338
 339 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 340 {
 341         compat_ino_t ino;
 342         int err;
 343
 344         if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
 345             !old_valid_dev(stat->rdev))
 346                 return -EOVERFLOW;
 347
 348         ino = stat->ino;
 349         if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
 350                 return -EOVERFLOW;
 351
 352         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 353         err |= put_user(stat->ino, &statbuf->st_ino);
 354         err |= put_user(stat->mode, &statbuf->st_mode);
 355         err |= put_user(stat->nlink, &statbuf->st_nlink);
 356         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 357         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 358         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 359         err |= put_user(stat->size, &statbuf->st_size);
 360         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 361         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 362         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 363         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 364         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 365         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 366         err |= put_user(stat->blksize, &statbuf->st_blksize);
 367         err |= put_user(stat->blocks, &statbuf->st_blocks);
 368         err |= put_user(0, &statbuf->__unused4[0]);
 369         err |= put_user(0, &statbuf->__unused4[1]);
 370
 371         return err;
 372 }
 373
 374 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
 375 {
 376         int err;
 377
 378         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 379         err |= put_user(stat->ino, &statbuf->st_ino);
 380         err |= put_user(stat->mode, &statbuf->st_mode);
 381         err |= put_user(stat->nlink, &statbuf->st_nlink);
 382         err |= put_user(stat->uid, &statbuf->st_uid);
 383         err |= put_user(stat->gid, &statbuf->st_gid);
 384         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 385         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 386         err |= put_user(stat->size, &statbuf->st_size);
 387         err |= put_user(stat->blksize, &statbuf->st_blksize);
 388         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 389         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 390         err |= put_user(stat->blocks, &statbuf->st_blocks);
 391         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 392         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 393         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 394         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 395         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 396         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 397         err |= put_user(0, &statbuf->__unused4);
 398         err |= put_user(0, &statbuf->__unused5);
 399
 400         return err;
 401 }
 402
 403 asmlinkage long compat_sys_stat64(char __user * filename,
 404                 struct compat_stat64 __user *statbuf)
 405 {
 406         struct kstat stat;
 407         int error = vfs_stat(filename, &stat);
 408
 409         if (!error)
 410                 error = cp_compat_stat64(&stat, statbuf);
 411         return error;
 412 }
 413
 414 asmlinkage long compat_sys_lstat64(char __user * filename,
 415                 struct compat_stat64 __user *statbuf)
 416 {
 417         struct kstat stat;
 418         int error = vfs_lstat(filename, &stat);
 419
 420         if (!error)
 421                 error = cp_compat_stat64(&stat, statbuf);
 422         return error;
 423 }
 424
 425 asmlinkage long compat_sys_fstat64(unsigned int fd,
 426                 struct compat_stat64 __user * statbuf)
 427 {
 428         struct kstat stat;
 429         int error = vfs_fstat(fd, &stat);
 430
 431         if (!error)
 432                 error = cp_compat_stat64(&stat, statbuf);
 433         return error;
 434 }
 435
 436 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
 437                 struct compat_stat64 __user * statbuf, int flag)
 438 {
 439         struct kstat stat;
 440         int error = -EINVAL;
 441
 442         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 443                 goto out;
 444
 445         if (flag & AT_SYMLINK_NOFOLLOW)
 446                 error = vfs_lstat_fd(dfd, filename, &stat);
 447         else
 448                 error = vfs_stat_fd(dfd, filename, &stat);
 449
 450         if (!error)
 451                 error = cp_compat_stat64(&stat, statbuf);
 452
 453 out:
 454         return error;
 455 }
 456
 457 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 458 {
 459         return sys_sysfs(option, arg1, arg2);
 460 }
 461
 462 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 463 {
 464         struct timespec t;
 465         int ret;
 466         mm_segment_t old_fs = get_fs ();
 467
 468         set_fs (KERNEL_DS);
 469         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 470         set_fs (old_fs);
 471         if (put_compat_timespec(&t, interval))
 472                 return -EFAULT;
 473         return ret;
 474 }
 475
 476 asmlinkage long compat_sys_rt_sigprocmask(int how,
 477                                           compat_sigset_t __user *set,
 478                                           compat_sigset_t __user *oset,
 479                                           compat_size_t sigsetsize)
 480 {
 481         sigset_t s;
 482         compat_sigset_t s32;
 483         int ret;
 484         mm_segment_t old_fs = get_fs();
 485
 486         if (set) {
 487                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 488                         return -EFAULT;
 489                 switch (_NSIG_WORDS) {
 490                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 491                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 492                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 493                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 494                 }
 495         }
 496         set_fs (KERNEL_DS);
 497         ret = sys_rt_sigprocmask(how,
 498                                  set ? (sigset_t __user *) &s : NULL,
 499                                  oset ? (sigset_t __user *) &s : NULL,
 500                                  sigsetsize);
 501         set_fs (old_fs);
 502         if (ret) return ret;
 503         if (oset) {
 504                 switch (_NSIG_WORDS) {
 505                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 506                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 507                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 508                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 509                 }
 510                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 511                         return -EFAULT;
 512         }
 513         return 0;
 514 }
 515
 516 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 517                                     compat_size_t sigsetsize)
 518 {
 519         sigset_t s;
 520         compat_sigset_t s32;
 521         int ret;
 522         mm_segment_t old_fs = get_fs();
 523
 524         set_fs (KERNEL_DS);
 525         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 526         set_fs (old_fs);
 527         if (!ret) {
 528                 switch (_NSIG_WORDS) {
 529                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 530                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 531                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 532                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 533                 }
 534                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 535                         return -EFAULT;
 536         }
 537         return ret;
 538 }
 539
 540 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 541                                            struct compat_siginfo __user *uinfo)
 542 {
 543         siginfo_t info;
 544         int ret;
 545         mm_segment_t old_fs = get_fs();
 546
 547         if (copy_siginfo_from_user32(&info, uinfo))
 548                 return -EFAULT;
 549
 550         set_fs (KERNEL_DS);
 551         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 552         set_fs (old_fs);
 553         return ret;
 554 }
 555
 556 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 557                                      struct old_sigaction32 __user *oact)
 558 {
 559         struct k_sigaction new_ka, old_ka;
 560         int ret;
 561
 562         if (sig < 0) {
 563                 set_thread_flag(TIF_NEWSIGNALS);
 564                 sig = -sig;
 565         }
 566
 567         if (act) {
 568                 compat_old_sigset_t mask;
 569                 u32 u_handler, u_restorer;
 570
 571                 ret = get_user(u_handler, &act->sa_handler);
 572                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 573                 ret |= __get_user(u_restorer, &act->sa_restorer);
 574                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 575                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 576                 ret |= __get_user(mask, &act->sa_mask);
 577                 if (ret)
 578                         return ret;
 579                 new_ka.ka_restorer = NULL;
 580                 siginitset(&new_ka.sa.sa_mask, mask);
 581         }
 582
 583         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 584
 585         if (!ret && oact) {
 586                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 587                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 588                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 589                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 590         }
 591
 592         return ret;
 593 }
 594
 595 asmlinkage long compat_sys_rt_sigaction(int sig,
 596                                         struct sigaction32 __user *act,
 597                                         struct sigaction32 __user *oact,
 598                                         void __user *restorer,
 599                                         compat_size_t sigsetsize)
 600 {
 601         struct k_sigaction new_ka, old_ka;
 602         int ret;
 603         compat_sigset_t set32;
 604
 605         /* XXX: Don't preclude handling different sized sigset_t's.  */
 606         if (sigsetsize != sizeof(compat_sigset_t))
 607                 return -EINVAL;
 608
 609         /* All tasks which use RT signals (effectively) use
 610          * new style signals.
 611          */
 612         set_thread_flag(TIF_NEWSIGNALS);
 613
 614         if (act) {
 615                 u32 u_handler, u_restorer;
 616
 617                 new_ka.ka_restorer = restorer;
 618                 ret = get_user(u_handler, &act->sa_handler);
 619                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 620                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 621                 switch (_NSIG_WORDS) {
 622                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 623                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 624                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 625                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 626                 }
 627                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 628                 ret |= __get_user(u_restorer, &act->sa_restorer);
 629                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 630                 if (ret)
 631                         return -EFAULT;
 632         }
 633
 634         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 635
 636         if (!ret && oact) {
 637                 switch (_NSIG_WORDS) {
 638                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 639                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 640                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 641                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 642                 }
 643                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 644                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 645                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 646                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 647                 if (ret)
 648                         ret = -EFAULT;
 649         }
 650
 651         return ret;
 652 }
 653
 654 /*
 655  * sparc32_execve() executes a new program after the asm stub has set
 656  * things up for us.  This should basically do what I want it to.
 657  */
 658 asmlinkage long sparc32_execve(struct pt_regs *regs)
 659 {
 660         int error, base = 0;
 661         char *filename;
 662
 663         /* User register window flush is done by entry.S */
 664
 665         /* Check for indirect call. */
 666         if ((u32)regs->u_regs[UREG_G1] == 0)
 667                 base = 1;
 668
 669         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 670         error = PTR_ERR(filename);
 671         if (IS_ERR(filename))
 672                 goto out;
 673
 674         error = compat_do_execve(filename,
 675                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 676                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 677
 678         putname(filename);
 679
 680         if (!error) {
 681                 fprs_write(0);
 682                 current_thread_info()->xfsr[0] = 0;
 683                 current_thread_info()->fpsaved[0] = 0;
 684                 regs->tstate &= ~TSTATE_PEF;
 685                 task_lock(current);
 686                 current->ptrace &= ~PT_DTRACE;
 687                 task_unlock(current);
 688         }
 689 out:
 690         return error;
 691 }
 692
 693 #ifdef CONFIG_MODULES
 694
 695 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 696                                   const char __user *uargs)
 697 {
 698         return sys_init_module(umod, len, uargs);
 699 }
 700
 701 asmlinkage long sys32_delete_module(const char __user *name_user,
 702                                     unsigned int flags)
 703 {
 704         return sys_delete_module(name_user, flags);
 705 }
 706
 707 #else /* CONFIG_MODULES */
 708
 709 asmlinkage long sys32_init_module(const char __user *name_user,
 710                                   struct module __user *mod_user)
 711 {
 712         return -ENOSYS;
 713 }
 714
 715 asmlinkage long sys32_delete_module(const char __user *name_user)
 716 {
 717         return -ENOSYS;
 718 }
 719
 720 #endif  /* CONFIG_MODULES */
 721
 722 /* Translations due to time_t size differences.  Which affects all
 723    sorts of things, like timeval and itimerval.  */
 724
 725 extern struct timezone sys_tz;
 726
 727 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 728                                    struct timezone __user *tz)
 729 {
 730         if (tv) {
 731                 struct timeval ktv;
 732                 do_gettimeofday(&ktv);
 733                 if (put_tv32(tv, &ktv))
 734                         return -EFAULT;
 735         }
 736         if (tz) {
 737                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 738                         return -EFAULT;
 739         }
 740         return 0;
 741 }
 742
 743 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 744 {
 745         long usec;
 746
 747         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 748                 return -EFAULT;
 749         if (__get_user(o->tv_sec, &i->tv_sec))
 750                 return -EFAULT;
 751         if (__get_user(usec, &i->tv_usec))
 752                 return -EFAULT;
 753         o->tv_nsec = usec * 1000;
 754         return 0;
 755 }
 756
 757 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 758                                    struct timezone __user *tz)
 759 {
 760         struct timespec kts;
 761         struct timezone ktz;
 762
 763         if (tv) {
 764                 if (get_ts32(&kts, tv))
 765                         return -EFAULT;
 766         }
 767         if (tz) {
 768                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 769                         return -EFAULT;
 770         }
 771
 772         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 773 }
 774
 775 asmlinkage long sys32_utimes(char __user *filename,
 776                              struct compat_timeval __user *tvs)
 777 {
 778         struct timeval ktvs[2];
 779
 780         if (tvs) {
 781                 if (get_tv32(&ktvs[0], tvs) ||
 782                     get_tv32(&ktvs[1], 1+tvs))
 783                         return -EFAULT;
 784         }
 785
 786         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 787 }
 788
 789 /* These are here just in case some old sparc32 binary calls it. */
 790 asmlinkage long sys32_pause(void)
 791 {
 792         current->state = TASK_INTERRUPTIBLE;
 793         schedule();
 794         return -ERESTARTNOHAND;
 795 }
 796
 797 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 798                                         char __user *ubuf,
 799                                         compat_size_t count,
 800                                         unsigned long poshi,
 801                                         unsigned long poslo)
 802 {
 803         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 804 }
 805
 806 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 807                                          char __user *ubuf,
 808                                          compat_size_t count,
 809                                          unsigned long poshi,
 810                                          unsigned long poslo)
 811 {
 812         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 813 }
 814
 815 asmlinkage long compat_sys_readahead(int fd,
 816                                      unsigned long offhi,
 817                                      unsigned long offlo,
 818                                      compat_size_t count)
 819 {
 820         return sys_readahead(fd, (offhi << 32) | offlo, count);
 821 }
 822
 823 long compat_sys_fadvise64(int fd,
 824                           unsigned long offhi,
 825                           unsigned long offlo,
 826                           compat_size_t len, int advice)
 827 {
 828         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 829 }
 830
 831 long compat_sys_fadvise64_64(int fd,
 832                              unsigned long offhi, unsigned long offlo,
 833                              unsigned long lenhi, unsigned long lenlo,
 834                              int advice)
 835 {
 836         return sys_fadvise64_64(fd,
 837                                 (offhi << 32) | offlo,
 838                                 (lenhi << 32) | lenlo,
 839                                 advice);
 840 }
 841
 842 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 843                                     compat_off_t __user *offset,
 844                                     compat_size_t count)
 845 {
 846         mm_segment_t old_fs = get_fs();
 847         int ret;
 848         off_t of;
 849
 850         if (offset && get_user(of, offset))
 851                 return -EFAULT;
 852
 853         set_fs(KERNEL_DS);
 854         ret = sys_sendfile(out_fd, in_fd,
 855                            offset ? (off_t __user *) &of : NULL,
 856                            count);
 857         set_fs(old_fs);
 858
 859         if (offset && put_user(of, offset))
 860                 return -EFAULT;
 861
 862         return ret;
 863 }
 864
 865 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 866                                       compat_loff_t __user *offset,
 867                                       compat_size_t count)
 868 {
 869         mm_segment_t old_fs = get_fs();
 870         int ret;
 871         loff_t lof;
 872
 873         if (offset && get_user(lof, offset))
 874                 return -EFAULT;
 875
 876         set_fs(KERNEL_DS);
 877         ret = sys_sendfile64(out_fd, in_fd,
 878                              offset ? (loff_t __user *) &lof : NULL,
 879                              count);
 880         set_fs(old_fs);
 881
 882         if (offset && put_user(lof, offset))
 883                 return -EFAULT;
 884
 885         return ret;
 886 }
 887
 888 /* This is just a version for 32-bit applications which does
 889  * not force O_LARGEFILE on.
 890  */
 891
 892 asmlinkage long sparc32_open(const char __user *filename,
 893                              int flags, int mode)
 894 {
 895         return do_sys_open(AT_FDCWD, filename, flags, mode);
 896 }
 897
 898 extern unsigned long do_mremap(unsigned long addr,
 899         unsigned long old_len, unsigned long new_len,
 900         unsigned long flags, unsigned long new_addr);
 901
 902 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 903         unsigned long old_len, unsigned long new_len,
 904         unsigned long flags, u32 __new_addr)
 905 {
 906         struct vm_area_struct *vma;
 907         unsigned long ret = -EINVAL;
 908         unsigned long new_addr = __new_addr;
 909
 910         if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
 911                 goto out;
 912         if (addr > STACK_TOP32 - old_len)
 913                 goto out;
 914         down_write(&current->mm->mmap_sem);
 915         if (flags & MREMAP_FIXED) {
 916                 if (new_addr > STACK_TOP32 - new_len)
 917                         goto out_sem;
 918         } else if (addr > STACK_TOP32 - new_len) {
 919                 unsigned long map_flags = 0;
 920                 struct file *file = NULL;
 921
 922                 ret = -ENOMEM;
 923                 if (!(flags & MREMAP_MAYMOVE))
 924                         goto out_sem;
 925
 926                 vma = find_vma(current->mm, addr);
 927                 if (vma) {
 928                         if (vma->vm_flags & VM_SHARED)
 929                                 map_flags |= MAP_SHARED;
 930                         file = vma->vm_file;
 931                 }
 932
 933                 /* MREMAP_FIXED checked above. */
 934                 new_addr = get_unmapped_area(file, addr, new_len,
 935                                     vma ? vma->vm_pgoff : 0,
 936                                     map_flags);
 937                 ret = new_addr;
 938                 if (new_addr & ~PAGE_MASK)
 939                         goto out_sem;
 940                 flags |= MREMAP_FIXED;
 941         }
 942         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
 943 out_sem:
 944         up_write(&current->mm->mmap_sem);
 945 out:
 946         return ret;
 947 }
 948
 949 struct __sysctl_args32 {
 950         u32 name;
 951         int nlen;
 952         u32 oldval;
 953         u32 oldlenp;
 954         u32 newval;
 955         u32 newlen;
 956         u32 __unused[4];
 957 };
 958
 959 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 960 {
 961 #ifndef CONFIG_SYSCTL_SYSCALL
 962         return -ENOSYS;
 963 #else
 964         struct __sysctl_args32 tmp;
 965         int error;
 966         size_t oldlen, __user *oldlenp = NULL;
 967         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
 968
 969         if (copy_from_user(&tmp, args, sizeof(tmp)))
 970                 return -EFAULT;
 971
 972         if (tmp.oldval && tmp.oldlenp) {
 973                 /* Duh, this is ugly and might not work if sysctl_args
 974                    is in read-only memory, but do_sysctl does indirectly
 975                    a lot of uaccess in both directions and we'd have to
 976                    basically copy the whole sysctl.c here, and
 977                    glibc's __sysctl uses rw memory for the structure
 978                    anyway.  */
 979                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
 980                     put_user(oldlen, (size_t __user *)addr))
 981                         return -EFAULT;
 982                 oldlenp = (size_t __user *)addr;
 983         }
 984
 985         lock_kernel();
 986         error = do_sysctl((int __user *)(unsigned long) tmp.name,
 987                           tmp.nlen,
 988                           (void __user *)(unsigned long) tmp.oldval,
 989                           oldlenp,
 990                           (void __user *)(unsigned long) tmp.newval,
 991                           tmp.newlen);
 992         unlock_kernel();
 993         if (oldlenp) {
 994                 if (!error) {
 995                         if (get_user(oldlen, (size_t __user *)addr) ||
 996                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
 997                                 error = -EFAULT;
 998                 }
 999                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1000                         error = -EFAULT;
1001         }
1002         return error;
1003 #endif
1004 }
1005
1006 long sys32_lookup_dcookie(unsigned long cookie_high,
1007                           unsigned long cookie_low,
1008                           char __user *buf, size_t len)
1009 {
1010         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1011                                   buf, len);
1012 }
1013
1014 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)
1015 {
1016         return sys_sync_file_range(fd,
1017                                    (off_high << 32) | off_low,
1018                                    (nb_high << 32) | nb_low,
1019                                    flags);
1020 }