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/config.h>
  12 #include <linux/kernel.h>
  13 #include <linux/sched.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/timex.h>
  22 #include <linux/smp.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/sem.h>
  25 #include <linux/msg.h>
  26 #include <linux/shm.h>
  27 #include <linux/slab.h>
  28 #include <linux/uio.h>
  29 #include <linux/nfs_fs.h>
  30 #include <linux/quota.h>
  31 #include <linux/module.h>
  32 #include <linux/sunrpc/svc.h>
  33 #include <linux/nfsd/nfsd.h>
  34 #include <linux/nfsd/cache.h>
  35 #include <linux/nfsd/xdr.h>
  36 #include <linux/nfsd/syscall.h>
  37 #include <linux/poll.h>
  38 #include <linux/personality.h>
  39 #include <linux/stat.h>
  40 #include <linux/filter.h>
  41 #include <linux/highmem.h>
  42 #include <linux/highuid.h>
  43 #include <linux/mman.h>
  44 #include <linux/ipv6.h>
  45 #include <linux/in.h>
  46 #include <linux/icmpv6.h>
  47 #include <linux/syscalls.h>
  48 #include <linux/sysctl.h>
  49 #include <linux/binfmts.h>
  50 #include <linux/dnotify.h>
  51 #include <linux/security.h>
  52 #include <linux/compat.h>
  53 #include <linux/vfs.h>
  54 #include <linux/netfilter_ipv4/ip_tables.h>
  55 #include <linux/ptrace.h>
  56 #include <linux/highuid.h>
  57
  58 #include <asm/types.h>
  59 #include <asm/ipc.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/fpumacro.h>
  62 #include <asm/semaphore.h>
  63 #include <asm/mmu_context.h>
  64
  65 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
  66 {
  67         return sys_chown(filename, low2highuid(user), low2highgid(group));
  68 }
  69
  70 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
  71 {
  72         return sys_lchown(filename, low2highuid(user), low2highgid(group));
  73 }
  74
  75 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
  76 {
  77         return sys_fchown(fd, low2highuid(user), low2highgid(group));
  78 }
  79
  80 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
  81 {
  82         return sys_setregid(low2highgid(rgid), low2highgid(egid));
  83 }
  84
  85 asmlinkage long sys32_setgid16(u16 gid)
  86 {
  87         return sys_setgid((gid_t)gid);
  88 }
  89
  90 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
  91 {
  92         return sys_setreuid(low2highuid(ruid), low2highuid(euid));
  93 }
  94
  95 asmlinkage long sys32_setuid16(u16 uid)
  96 {
  97         return sys_setuid((uid_t)uid);
  98 }
  99
 100 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
 101 {
 102         return sys_setresuid(low2highuid(ruid), low2highuid(euid),
 103                 low2highuid(suid));
 104 }
 105
 106 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
 107 {
 108         int retval;
 109
 110         if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
 111             !(retval = put_user(high2lowuid(current->euid), euid)))
 112                 retval = put_user(high2lowuid(current->suid), suid);
 113
 114         return retval;
 115 }
 116
 117 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
 118 {
 119         return sys_setresgid(low2highgid(rgid), low2highgid(egid),
 120                 low2highgid(sgid));
 121 }
 122
 123 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
 124 {
 125         int retval;
 126
 127         if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
 128             !(retval = put_user(high2lowgid(current->egid), egid)))
 129                 retval = put_user(high2lowgid(current->sgid), sgid);
 130
 131         return retval;
 132 }
 133
 134 asmlinkage long sys32_setfsuid16(u16 uid)
 135 {
 136         return sys_setfsuid((uid_t)uid);
 137 }
 138
 139 asmlinkage long sys32_setfsgid16(u16 gid)
 140 {
 141         return sys_setfsgid((gid_t)gid);
 142 }
 143
 144 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
 145 {
 146         int i;
 147         u16 group;
 148
 149         for (i = 0; i < group_info->ngroups; i++) {
 150                 group = (u16)GROUP_AT(group_info, i);
 151                 if (put_user(group, grouplist+i))
 152                         return -EFAULT;
 153         }
 154
 155         return 0;
 156 }
 157
 158 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
 159 {
 160         int i;
 161         u16 group;
 162
 163         for (i = 0; i < group_info->ngroups; i++) {
 164                 if (get_user(group, grouplist+i))
 165                         return  -EFAULT;
 166                 GROUP_AT(group_info, i) = (gid_t)group;
 167         }
 168
 169         return 0;
 170 }
 171
 172 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
 173 {
 174         int i;
 175
 176         if (gidsetsize < 0)
 177                 return -EINVAL;
 178
 179         get_group_info(current->group_info);
 180         i = current->group_info->ngroups;
 181         if (gidsetsize) {
 182                 if (i > gidsetsize) {
 183                         i = -EINVAL;
 184                         goto out;
 185                 }
 186                 if (groups16_to_user(grouplist, current->group_info)) {
 187                         i = -EFAULT;
 188                         goto out;
 189                 }
 190         }
 191 out:
 192         put_group_info(current->group_info);
 193         return i;
 194 }
 195
 196 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 197 {
 198         struct group_info *group_info;
 199         int retval;
 200
 201         if (!capable(CAP_SETGID))
 202                 return -EPERM;
 203         if ((unsigned)gidsetsize > NGROUPS_MAX)
 204                 return -EINVAL;
 205
 206         group_info = groups_alloc(gidsetsize);
 207         if (!group_info)
 208                 return -ENOMEM;
 209         retval = groups16_from_user(group_info, grouplist);
 210         if (retval) {
 211                 put_group_info(group_info);
 212                 return retval;
 213         }
 214
 215         retval = set_current_groups(group_info);
 216         put_group_info(group_info);
 217
 218         return retval;
 219 }
 220
 221 asmlinkage long sys32_getuid16(void)
 222 {
 223         return high2lowuid(current->uid);
 224 }
 225
 226 asmlinkage long sys32_geteuid16(void)
 227 {
 228         return high2lowuid(current->euid);
 229 }
 230
 231 asmlinkage long sys32_getgid16(void)
 232 {
 233         return high2lowgid(current->gid);
 234 }
 235
 236 asmlinkage long sys32_getegid16(void)
 237 {
 238         return high2lowgid(current->egid);
 239 }
 240
 241 /* 32-bit timeval and related flotsam.  */
 242
 243 static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
 244 {
 245         return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
 246                 (__get_user(o->tv_sec, &i->tv_sec) |
 247                  __get_user(o->tv_usec, &i->tv_usec)));
 248 }
 249
 250 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 251 {
 252         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 253                 (__put_user(i->tv_sec, &o->tv_sec) |
 254                  __put_user(i->tv_usec, &o->tv_usec)));
 255 }
 256
 257 #ifdef CONFIG_SYSVIPC
 258 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
 259 {
 260         int version;
 261
 262         version = call >> 16; /* hack for backward compatibility */
 263         call &= 0xffff;
 264
 265         switch (call) {
 266         case SEMTIMEDOP:
 267                 if (fifth)
 268                         /* sign extend semid */
 269                         return compat_sys_semtimedop((int)first,
 270                                                      compat_ptr(ptr), second,
 271                                                      compat_ptr(fifth));
 272                 /* else fall through for normal semop() */
 273         case SEMOP:
 274                 /* struct sembuf is the same on 32 and 64bit :)) */
 275                 /* sign extend semid */
 276                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 277                                       NULL);
 278         case SEMGET:
 279                 /* sign extend key, nsems */
 280                 return sys_semget((int)first, (int)second, third);
 281         case SEMCTL:
 282                 /* sign extend semid, semnum */
 283                 return compat_sys_semctl((int)first, (int)second, third,
 284                                          compat_ptr(ptr));
 285
 286         case MSGSND:
 287                 /* sign extend msqid */
 288                 return compat_sys_msgsnd((int)first, (int)second, third,
 289                                          compat_ptr(ptr));
 290         case MSGRCV:
 291                 /* sign extend msqid, msgtyp */
 292                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 293                                          third, version, compat_ptr(ptr));
 294         case MSGGET:
 295                 /* sign extend key */
 296                 return sys_msgget((int)first, second);
 297         case MSGCTL:
 298                 /* sign extend msqid */
 299                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 300
 301         case SHMAT:
 302                 /* sign extend shmid */
 303                 return compat_sys_shmat((int)first, second, third, version,
 304                                         compat_ptr(ptr));
 305         case SHMDT:
 306                 return sys_shmdt(compat_ptr(ptr));
 307         case SHMGET:
 308                 /* sign extend key_t */
 309                 return sys_shmget((int)first, second, third);
 310         case SHMCTL:
 311                 /* sign extend shmid */
 312                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 313
 314         default:
 315                 return -ENOSYS;
 316         };
 317
 318         return -ENOSYS;
 319 }
 320 #endif
 321
 322 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 323 {
 324         if ((int)high < 0)
 325                 return -EINVAL;
 326         else
 327                 return sys_truncate(path, (high << 32) | low);
 328 }
 329
 330 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 331 {
 332         if ((int)high < 0)
 333                 return -EINVAL;
 334         else
 335                 return sys_ftruncate(fd, (high << 32) | low);
 336 }
 337
 338 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 339 {
 340         int err;
 341
 342         if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
 343             !old_valid_dev(stat->rdev))
 344                 return -EOVERFLOW;
 345
 346         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 347         err |= put_user(stat->ino, &statbuf->st_ino);
 348         err |= put_user(stat->mode, &statbuf->st_mode);
 349         err |= put_user(stat->nlink, &statbuf->st_nlink);
 350         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 351         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 352         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 353         err |= put_user(stat->size, &statbuf->st_size);
 354         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 355         err |= put_user(0, &statbuf->__unused1);
 356         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 357         err |= put_user(0, &statbuf->__unused2);
 358         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 359         err |= put_user(0, &statbuf->__unused3);
 360         err |= put_user(stat->blksize, &statbuf->st_blksize);
 361         err |= put_user(stat->blocks, &statbuf->st_blocks);
 362         err |= put_user(0, &statbuf->__unused4[0]);
 363         err |= put_user(0, &statbuf->__unused4[1]);
 364
 365         return err;
 366 }
 367
 368 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 369 {
 370         return sys_sysfs(option, arg1, arg2);
 371 }
 372
 373 struct sysinfo32 {
 374         s32 uptime;
 375         u32 loads[3];
 376         u32 totalram;
 377         u32 freeram;
 378         u32 sharedram;
 379         u32 bufferram;
 380         u32 totalswap;
 381         u32 freeswap;
 382         unsigned short procs;
 383         unsigned short pad;
 384         u32 totalhigh;
 385         u32 freehigh;
 386         u32 mem_unit;
 387         char _f[20-2*sizeof(int)-sizeof(int)];
 388 };
 389
 390 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 391 {
 392         struct sysinfo s;
 393         int ret, err;
 394         int bitcount = 0;
 395         mm_segment_t old_fs = get_fs ();
 396
 397         set_fs(KERNEL_DS);
 398         ret = sys_sysinfo((struct sysinfo __user *) &s);
 399         set_fs(old_fs);
 400         /* Check to see if any memory value is too large for 32-bit and
 401          * scale down if needed.
 402          */
 403         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 404                 while (s.mem_unit < PAGE_SIZE) {
 405                         s.mem_unit <<= 1;
 406                         bitcount++;
 407                 }
 408                 s.totalram >>= bitcount;
 409                 s.freeram >>= bitcount;
 410                 s.sharedram >>= bitcount;
 411                 s.bufferram >>= bitcount;
 412                 s.totalswap >>= bitcount;
 413                 s.freeswap >>= bitcount;
 414                 s.totalhigh >>= bitcount;
 415                 s.freehigh >>= bitcount;
 416         }
 417
 418         err = put_user (s.uptime, &info->uptime);
 419         err |= __put_user (s.loads[0], &info->loads[0]);
 420         err |= __put_user (s.loads[1], &info->loads[1]);
 421         err |= __put_user (s.loads[2], &info->loads[2]);
 422         err |= __put_user (s.totalram, &info->totalram);
 423         err |= __put_user (s.freeram, &info->freeram);
 424         err |= __put_user (s.sharedram, &info->sharedram);
 425         err |= __put_user (s.bufferram, &info->bufferram);
 426         err |= __put_user (s.totalswap, &info->totalswap);
 427         err |= __put_user (s.freeswap, &info->freeswap);
 428         err |= __put_user (s.procs, &info->procs);
 429         err |= __put_user (s.totalhigh, &info->totalhigh);
 430         err |= __put_user (s.freehigh, &info->freehigh);
 431         err |= __put_user (s.mem_unit, &info->mem_unit);
 432         if (err)
 433                 return -EFAULT;
 434         return ret;
 435 }
 436
 437 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 438 {
 439         struct timespec t;
 440         int ret;
 441         mm_segment_t old_fs = get_fs ();
 442
 443         set_fs (KERNEL_DS);
 444         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 445         set_fs (old_fs);
 446         if (put_compat_timespec(&t, interval))
 447                 return -EFAULT;
 448         return ret;
 449 }
 450
 451 asmlinkage long compat_sys_rt_sigprocmask(int how,
 452                                           compat_sigset_t __user *set,
 453                                           compat_sigset_t __user *oset,
 454                                           compat_size_t sigsetsize)
 455 {
 456         sigset_t s;
 457         compat_sigset_t s32;
 458         int ret;
 459         mm_segment_t old_fs = get_fs();
 460
 461         if (set) {
 462                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 463                         return -EFAULT;
 464                 switch (_NSIG_WORDS) {
 465                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 466                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 467                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 468                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 469                 }
 470         }
 471         set_fs (KERNEL_DS);
 472         ret = sys_rt_sigprocmask(how,
 473                                  set ? (sigset_t __user *) &s : NULL,
 474                                  oset ? (sigset_t __user *) &s : NULL,
 475                                  sigsetsize);
 476         set_fs (old_fs);
 477         if (ret) return ret;
 478         if (oset) {
 479                 switch (_NSIG_WORDS) {
 480                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 481                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 482                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 483                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 484                 }
 485                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 486                         return -EFAULT;
 487         }
 488         return 0;
 489 }
 490
 491 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 492                                     compat_size_t sigsetsize)
 493 {
 494         sigset_t s;
 495         compat_sigset_t s32;
 496         int ret;
 497         mm_segment_t old_fs = get_fs();
 498
 499         set_fs (KERNEL_DS);
 500         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 501         set_fs (old_fs);
 502         if (!ret) {
 503                 switch (_NSIG_WORDS) {
 504                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 505                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 506                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 507                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 508                 }
 509                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 510                         return -EFAULT;
 511         }
 512         return ret;
 513 }
 514
 515 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 516                                            struct compat_siginfo __user *uinfo)
 517 {
 518         siginfo_t info;
 519         int ret;
 520         mm_segment_t old_fs = get_fs();
 521
 522         if (copy_siginfo_from_user32(&info, uinfo))
 523                 return -EFAULT;
 524
 525         set_fs (KERNEL_DS);
 526         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 527         set_fs (old_fs);
 528         return ret;
 529 }
 530
 531 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 532                                      struct old_sigaction32 __user *oact)
 533 {
 534         struct k_sigaction new_ka, old_ka;
 535         int ret;
 536
 537         if (sig < 0) {
 538                 set_thread_flag(TIF_NEWSIGNALS);
 539                 sig = -sig;
 540         }
 541
 542         if (act) {
 543                 compat_old_sigset_t mask;
 544                 u32 u_handler, u_restorer;
 545
 546                 ret = get_user(u_handler, &act->sa_handler);
 547                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 548                 ret |= __get_user(u_restorer, &act->sa_restorer);
 549                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 550                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 551                 ret |= __get_user(mask, &act->sa_mask);
 552                 if (ret)
 553                         return ret;
 554                 new_ka.ka_restorer = NULL;
 555                 siginitset(&new_ka.sa.sa_mask, mask);
 556         }
 557
 558         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 559
 560         if (!ret && oact) {
 561                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 562                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 563                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 564                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 565         }
 566
 567         return ret;
 568 }
 569
 570 asmlinkage long compat_sys_rt_sigaction(int sig,
 571                                         struct sigaction32 __user *act,
 572                                         struct sigaction32 __user *oact,
 573                                         void __user *restorer,
 574                                         compat_size_t sigsetsize)
 575 {
 576         struct k_sigaction new_ka, old_ka;
 577         int ret;
 578         compat_sigset_t set32;
 579
 580         /* XXX: Don't preclude handling different sized sigset_t's.  */
 581         if (sigsetsize != sizeof(compat_sigset_t))
 582                 return -EINVAL;
 583
 584         /* All tasks which use RT signals (effectively) use
 585          * new style signals.
 586          */
 587         set_thread_flag(TIF_NEWSIGNALS);
 588
 589         if (act) {
 590                 u32 u_handler, u_restorer;
 591
 592                 new_ka.ka_restorer = restorer;
 593                 ret = get_user(u_handler, &act->sa_handler);
 594                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 595                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 596                 switch (_NSIG_WORDS) {
 597                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 598                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 599                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 600                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 601                 }
 602                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 603                 ret |= __get_user(u_restorer, &act->sa_restorer);
 604                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 605                 if (ret)
 606                         return -EFAULT;
 607         }
 608
 609         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 610
 611         if (!ret && oact) {
 612                 switch (_NSIG_WORDS) {
 613                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 614                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 615                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 616                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 617                 }
 618                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 619                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 620                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 621                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 622                 if (ret)
 623                         ret = -EFAULT;
 624         }
 625
 626         return ret;
 627 }
 628
 629 /*
 630  * sparc32_execve() executes a new program after the asm stub has set
 631  * things up for us.  This should basically do what I want it to.
 632  */
 633 asmlinkage long sparc32_execve(struct pt_regs *regs)
 634 {
 635         int error, base = 0;
 636         char *filename;
 637
 638         /* User register window flush is done by entry.S */
 639
 640         /* Check for indirect call. */
 641         if ((u32)regs->u_regs[UREG_G1] == 0)
 642                 base = 1;
 643
 644         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 645         error = PTR_ERR(filename);
 646         if (IS_ERR(filename))
 647                 goto out;
 648
 649         error = compat_do_execve(filename,
 650                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 651                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 652
 653         putname(filename);
 654
 655         if (!error) {
 656                 fprs_write(0);
 657                 current_thread_info()->xfsr[0] = 0;
 658                 current_thread_info()->fpsaved[0] = 0;
 659                 regs->tstate &= ~TSTATE_PEF;
 660                 task_lock(current);
 661                 current->ptrace &= ~PT_DTRACE;
 662                 task_unlock(current);
 663         }
 664 out:
 665         return error;
 666 }
 667
 668 #ifdef CONFIG_MODULES
 669
 670 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 671                                   const char __user *uargs)
 672 {
 673         return sys_init_module(umod, len, uargs);
 674 }
 675
 676 asmlinkage long sys32_delete_module(const char __user *name_user,
 677                                     unsigned int flags)
 678 {
 679         return sys_delete_module(name_user, flags);
 680 }
 681
 682 #else /* CONFIG_MODULES */
 683
 684 asmlinkage long sys32_init_module(const char __user *name_user,
 685                                   struct module __user *mod_user)
 686 {
 687         return -ENOSYS;
 688 }
 689
 690 asmlinkage long sys32_delete_module(const char __user *name_user)
 691 {
 692         return -ENOSYS;
 693 }
 694
 695 #endif  /* CONFIG_MODULES */
 696
 697 /* Translations due to time_t size differences.  Which affects all
 698    sorts of things, like timeval and itimerval.  */
 699
 700 extern struct timezone sys_tz;
 701
 702 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 703                                    struct timezone __user *tz)
 704 {
 705         if (tv) {
 706                 struct timeval ktv;
 707                 do_gettimeofday(&ktv);
 708                 if (put_tv32(tv, &ktv))
 709                         return -EFAULT;
 710         }
 711         if (tz) {
 712                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 713                         return -EFAULT;
 714         }
 715         return 0;
 716 }
 717
 718 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 719 {
 720         long usec;
 721
 722         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 723                 return -EFAULT;
 724         if (__get_user(o->tv_sec, &i->tv_sec))
 725                 return -EFAULT;
 726         if (__get_user(usec, &i->tv_usec))
 727                 return -EFAULT;
 728         o->tv_nsec = usec * 1000;
 729         return 0;
 730 }
 731
 732 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 733                                    struct timezone __user *tz)
 734 {
 735         struct timespec kts;
 736         struct timezone ktz;
 737
 738         if (tv) {
 739                 if (get_ts32(&kts, tv))
 740                         return -EFAULT;
 741         }
 742         if (tz) {
 743                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 744                         return -EFAULT;
 745         }
 746
 747         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 748 }
 749
 750 asmlinkage long sys32_utimes(char __user *filename,
 751                              struct compat_timeval __user *tvs)
 752 {
 753         struct timeval ktvs[2];
 754
 755         if (tvs) {
 756                 if (get_tv32(&ktvs[0], tvs) ||
 757                     get_tv32(&ktvs[1], 1+tvs))
 758                         return -EFAULT;
 759         }
 760
 761         return do_utimes(filename, (tvs ? &ktvs[0] : NULL));
 762 }
 763
 764 /* These are here just in case some old sparc32 binary calls it. */
 765 asmlinkage long sys32_pause(void)
 766 {
 767         current->state = TASK_INTERRUPTIBLE;
 768         schedule();
 769         return -ERESTARTNOHAND;
 770 }
 771
 772 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 773                                         char __user *ubuf,
 774                                         compat_size_t count,
 775                                         unsigned long poshi,
 776                                         unsigned long poslo)
 777 {
 778         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 779 }
 780
 781 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 782                                          char __user *ubuf,
 783                                          compat_size_t count,
 784                                          unsigned long poshi,
 785                                          unsigned long poslo)
 786 {
 787         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 788 }
 789
 790 asmlinkage long compat_sys_readahead(int fd,
 791                                      unsigned long offhi,
 792                                      unsigned long offlo,
 793                                      compat_size_t count)
 794 {
 795         return sys_readahead(fd, (offhi << 32) | offlo, count);
 796 }
 797
 798 long compat_sys_fadvise64(int fd,
 799                           unsigned long offhi,
 800                           unsigned long offlo,
 801                           compat_size_t len, int advice)
 802 {
 803         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 804 }
 805
 806 long compat_sys_fadvise64_64(int fd,
 807                              unsigned long offhi, unsigned long offlo,
 808                              unsigned long lenhi, unsigned long lenlo,
 809                              int advice)
 810 {
 811         return sys_fadvise64_64(fd,
 812                                 (offhi << 32) | offlo,
 813                                 (lenhi << 32) | lenlo,
 814                                 advice);
 815 }
 816
 817 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 818                                     compat_off_t __user *offset,
 819                                     compat_size_t count)
 820 {
 821         mm_segment_t old_fs = get_fs();
 822         int ret;
 823         off_t of;
 824
 825         if (offset && get_user(of, offset))
 826                 return -EFAULT;
 827
 828         set_fs(KERNEL_DS);
 829         ret = sys_sendfile(out_fd, in_fd,
 830                            offset ? (off_t __user *) &of : NULL,
 831                            count);
 832         set_fs(old_fs);
 833
 834         if (offset && put_user(of, offset))
 835                 return -EFAULT;
 836
 837         return ret;
 838 }
 839
 840 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 841                                       compat_loff_t __user *offset,
 842                                       compat_size_t count)
 843 {
 844         mm_segment_t old_fs = get_fs();
 845         int ret;
 846         loff_t lof;
 847
 848         if (offset && get_user(lof, offset))
 849                 return -EFAULT;
 850
 851         set_fs(KERNEL_DS);
 852         ret = sys_sendfile64(out_fd, in_fd,
 853                              offset ? (loff_t __user *) &lof : NULL,
 854                              count);
 855         set_fs(old_fs);
 856
 857         if (offset && put_user(lof, offset))
 858                 return -EFAULT;
 859
 860         return ret;
 861 }
 862
 863 /* Handle adjtimex compatibility. */
 864
 865 struct timex32 {
 866         u32 modes;
 867         s32 offset, freq, maxerror, esterror;
 868         s32 status, constant, precision, tolerance;
 869         struct compat_timeval time;
 870         s32 tick;
 871         s32 ppsfreq, jitter, shift, stabil;
 872         s32 jitcnt, calcnt, errcnt, stbcnt;
 873         s32  :32; s32  :32; s32  :32; s32  :32;
 874         s32  :32; s32  :32; s32  :32; s32  :32;
 875         s32  :32; s32  :32; s32  :32; s32  :32;
 876 };
 877
 878 extern int do_adjtimex(struct timex *);
 879
 880 asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 881 {
 882         struct timex txc;
 883         int ret;
 884
 885         memset(&txc, 0, sizeof(struct timex));
 886
 887         if (get_user(txc.modes, &utp->modes) ||
 888             __get_user(txc.offset, &utp->offset) ||
 889             __get_user(txc.freq, &utp->freq) ||
 890             __get_user(txc.maxerror, &utp->maxerror) ||
 891             __get_user(txc.esterror, &utp->esterror) ||
 892             __get_user(txc.status, &utp->status) ||
 893             __get_user(txc.constant, &utp->constant) ||
 894             __get_user(txc.precision, &utp->precision) ||
 895             __get_user(txc.tolerance, &utp->tolerance) ||
 896             __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 897             __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 898             __get_user(txc.tick, &utp->tick) ||
 899             __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 900             __get_user(txc.jitter, &utp->jitter) ||
 901             __get_user(txc.shift, &utp->shift) ||
 902             __get_user(txc.stabil, &utp->stabil) ||
 903             __get_user(txc.jitcnt, &utp->jitcnt) ||
 904             __get_user(txc.calcnt, &utp->calcnt) ||
 905             __get_user(txc.errcnt, &utp->errcnt) ||
 906             __get_user(txc.stbcnt, &utp->stbcnt))
 907                 return -EFAULT;
 908
 909         ret = do_adjtimex(&txc);
 910
 911         if (put_user(txc.modes, &utp->modes) ||
 912             __put_user(txc.offset, &utp->offset) ||
 913             __put_user(txc.freq, &utp->freq) ||
 914             __put_user(txc.maxerror, &utp->maxerror) ||
 915             __put_user(txc.esterror, &utp->esterror) ||
 916             __put_user(txc.status, &utp->status) ||
 917             __put_user(txc.constant, &utp->constant) ||
 918             __put_user(txc.precision, &utp->precision) ||
 919             __put_user(txc.tolerance, &utp->tolerance) ||
 920             __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 921             __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 922             __put_user(txc.tick, &utp->tick) ||
 923             __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 924             __put_user(txc.jitter, &utp->jitter) ||
 925             __put_user(txc.shift, &utp->shift) ||
 926             __put_user(txc.stabil, &utp->stabil) ||
 927             __put_user(txc.jitcnt, &utp->jitcnt) ||
 928             __put_user(txc.calcnt, &utp->calcnt) ||
 929             __put_user(txc.errcnt, &utp->errcnt) ||
 930             __put_user(txc.stbcnt, &utp->stbcnt))
 931                 ret = -EFAULT;
 932
 933         return ret;
 934 }
 935
 936 /* This is just a version for 32-bit applications which does
 937  * not force O_LARGEFILE on.
 938  */
 939
 940 asmlinkage long sparc32_open(const char __user *filename,
 941                              int flags, int mode)
 942 {
 943         char * tmp;
 944         int fd, error;
 945
 946         tmp = getname(filename);
 947         fd = PTR_ERR(tmp);
 948         if (!IS_ERR(tmp)) {
 949                 fd = get_unused_fd();
 950                 if (fd >= 0) {
 951                         struct file * f = filp_open(tmp, flags, mode);
 952                         error = PTR_ERR(f);
 953                         if (IS_ERR(f))
 954                                 goto out_error;
 955                         fd_install(fd, f);
 956                 }
 957 out:
 958                 putname(tmp);
 959         }
 960         return fd;
 961
 962 out_error:
 963         put_unused_fd(fd);
 964         fd = error;
 965         goto out;
 966 }
 967
 968 extern unsigned long do_mremap(unsigned long addr,
 969         unsigned long old_len, unsigned long new_len,
 970         unsigned long flags, unsigned long new_addr);
 971
 972 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 973         unsigned long old_len, unsigned long new_len,
 974         unsigned long flags, u32 __new_addr)
 975 {
 976         struct vm_area_struct *vma;
 977         unsigned long ret = -EINVAL;
 978         unsigned long new_addr = __new_addr;
 979
 980         if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
 981                 goto out;
 982         if (addr > 0xf0000000UL - old_len)
 983                 goto out;
 984         down_write(&current->mm->mmap_sem);
 985         if (flags & MREMAP_FIXED) {
 986                 if (new_addr > 0xf0000000UL - new_len)
 987                         goto out_sem;
 988         } else if (addr > 0xf0000000UL - new_len) {
 989                 unsigned long map_flags = 0;
 990                 struct file *file = NULL;
 991
 992                 ret = -ENOMEM;
 993                 if (!(flags & MREMAP_MAYMOVE))
 994                         goto out_sem;
 995
 996                 vma = find_vma(current->mm, addr);
 997                 if (vma) {
 998                         if (vma->vm_flags & VM_SHARED)
 999                                 map_flags |= MAP_SHARED;
1000                         file = vma->vm_file;
1001                 }
1002
1003                 /* MREMAP_FIXED checked above. */
1004                 new_addr = get_unmapped_area(file, addr, new_len,
1005                                     vma ? vma->vm_pgoff : 0,
1006                                     map_flags);
1007                 ret = new_addr;
1008                 if (new_addr & ~PAGE_MASK)
1009                         goto out_sem;
1010                 flags |= MREMAP_FIXED;
1011         }
1012         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1013 out_sem:
1014         up_write(&current->mm->mmap_sem);
1015 out:
1016         return ret;
1017 }
1018
1019 struct __sysctl_args32 {
1020         u32 name;
1021         int nlen;
1022         u32 oldval;
1023         u32 oldlenp;
1024         u32 newval;
1025         u32 newlen;
1026         u32 __unused[4];
1027 };
1028
1029 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1030 {
1031 #ifndef CONFIG_SYSCTL
1032         return -ENOSYS;
1033 #else
1034         struct __sysctl_args32 tmp;
1035         int error;
1036         size_t oldlen, __user *oldlenp = NULL;
1037         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1038
1039         if (copy_from_user(&tmp, args, sizeof(tmp)))
1040                 return -EFAULT;
1041
1042         if (tmp.oldval && tmp.oldlenp) {
1043                 /* Duh, this is ugly and might not work if sysctl_args
1044                    is in read-only memory, but do_sysctl does indirectly
1045                    a lot of uaccess in both directions and we'd have to
1046                    basically copy the whole sysctl.c here, and
1047                    glibc's __sysctl uses rw memory for the structure
1048                    anyway.  */
1049                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1050                     put_user(oldlen, (size_t __user *)addr))
1051                         return -EFAULT;
1052                 oldlenp = (size_t __user *)addr;
1053         }
1054
1055         lock_kernel();
1056         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1057                           tmp.nlen,
1058                           (void __user *)(unsigned long) tmp.oldval,
1059                           oldlenp,
1060                           (void __user *)(unsigned long) tmp.newval,
1061                           tmp.newlen);
1062         unlock_kernel();
1063         if (oldlenp) {
1064                 if (!error) {
1065                         if (get_user(oldlen, (size_t __user *)addr) ||
1066                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1067                                 error = -EFAULT;
1068                 }
1069                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1070                         error = -EFAULT;
1071         }
1072         return error;
1073 #endif
1074 }
1075
1076 long sys32_lookup_dcookie(unsigned long cookie_high,
1077                           unsigned long cookie_low,
1078                           char __user *buf, size_t len)
1079 {
1080         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1081                                   buf, len);
1082 }
1083
1084 extern asmlinkage long
1085 sys_timer_create(clockid_t which_clock,
1086                  struct sigevent __user *timer_event_spec,
1087                  timer_t __user *created_timer_id);
1088
1089 long
1090 sys32_timer_create(u32 clock, struct compat_sigevent __user *se32,
1091                    timer_t __user *timer_id)
1092 {
1093         struct sigevent se;
1094         mm_segment_t oldfs;
1095         timer_t t;
1096         long err;
1097
1098         if (se32 == NULL)
1099                 return sys_timer_create(clock, NULL, timer_id);
1100
1101         if (get_compat_sigevent(&se, se32))
1102                 return -EFAULT;
1103
1104         if (!access_ok(VERIFY_WRITE,timer_id,sizeof(timer_t)))
1105                 return -EFAULT;
1106
1107         oldfs = get_fs();
1108         set_fs(KERNEL_DS);
1109         err = sys_timer_create(clock,
1110                                (struct sigevent __user *) &se,
1111                                (timer_t __user *) &t);
1112         set_fs(oldfs);
1113
1114         if (!err)
1115                 err = __put_user (t, timer_id);
1116
1117         return err;
1118 }