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/capability.h>
  15 #include <linux/fs.h>
  16 #include <linux/mm.h>
  17 #include <linux/file.h>
  18 #include <linux/signal.h>
  19 #include <linux/resource.h>
  20 #include <linux/times.h>
  21 #include <linux/utsname.h>
  22 #include <linux/timex.h>
  23 #include <linux/smp.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/sem.h>
  26 #include <linux/msg.h>
  27 #include <linux/shm.h>
  28 #include <linux/slab.h>
  29 #include <linux/uio.h>
  30 #include <linux/nfs_fs.h>
  31 #include <linux/quota.h>
  32 #include <linux/module.h>
  33 #include <linux/sunrpc/svc.h>
  34 #include <linux/nfsd/nfsd.h>
  35 #include <linux/nfsd/cache.h>
  36 #include <linux/nfsd/xdr.h>
  37 #include <linux/nfsd/syscall.h>
  38 #include <linux/poll.h>
  39 #include <linux/personality.h>
  40 #include <linux/stat.h>
  41 #include <linux/filter.h>
  42 #include <linux/highmem.h>
  43 #include <linux/highuid.h>
  44 #include <linux/mman.h>
  45 #include <linux/ipv6.h>
  46 #include <linux/in.h>
  47 #include <linux/icmpv6.h>
  48 #include <linux/syscalls.h>
  49 #include <linux/sysctl.h>
  50 #include <linux/binfmts.h>
  51 #include <linux/dnotify.h>
  52 #include <linux/security.h>
  53 #include <linux/compat.h>
  54 #include <linux/vfs.h>
  55 #include <linux/netfilter_ipv4/ip_tables.h>
  56 #include <linux/ptrace.h>
  57 #include <linux/highuid.h>
  58
  59 #include <asm/types.h>
  60 #include <asm/ipc.h>
  61 #include <asm/uaccess.h>
  62 #include <asm/fpumacro.h>
  63 #include <asm/semaphore.h>
  64 #include <asm/mmu_context.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         int err;
 342
 343         if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
 344             !old_valid_dev(stat->rdev))
 345                 return -EOVERFLOW;
 346
 347         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 348         err |= put_user(stat->ino, &statbuf->st_ino);
 349         err |= put_user(stat->mode, &statbuf->st_mode);
 350         err |= put_user(stat->nlink, &statbuf->st_nlink);
 351         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 352         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 353         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 354         err |= put_user(stat->size, &statbuf->st_size);
 355         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 356         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 357         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 358         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 359         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 360         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 361         err |= put_user(stat->blksize, &statbuf->st_blksize);
 362         err |= put_user(stat->blocks, &statbuf->st_blocks);
 363         err |= put_user(0, &statbuf->__unused4[0]);
 364         err |= put_user(0, &statbuf->__unused4[1]);
 365
 366         return err;
 367 }
 368
 369 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
 370 {
 371         int err;
 372
 373         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 374         err |= put_user(stat->ino, &statbuf->st_ino);
 375         err |= put_user(stat->mode, &statbuf->st_mode);
 376         err |= put_user(stat->nlink, &statbuf->st_nlink);
 377         err |= put_user(stat->uid, &statbuf->st_uid);
 378         err |= put_user(stat->gid, &statbuf->st_gid);
 379         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 380         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 381         err |= put_user(stat->size, &statbuf->st_size);
 382         err |= put_user(stat->blksize, &statbuf->st_blksize);
 383         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 384         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 385         err |= put_user(stat->blocks, &statbuf->st_blocks);
 386         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 387         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 388         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 389         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 390         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 391         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 392         err |= put_user(0, &statbuf->__unused4);
 393         err |= put_user(0, &statbuf->__unused5);
 394
 395         return err;
 396 }
 397
 398 asmlinkage long compat_sys_stat64(char __user * filename,
 399                 struct compat_stat64 __user *statbuf)
 400 {
 401         struct kstat stat;
 402         int error = vfs_stat(filename, &stat);
 403
 404         if (!error)
 405                 error = cp_compat_stat64(&stat, statbuf);
 406         return error;
 407 }
 408
 409 asmlinkage long compat_sys_lstat64(char __user * filename,
 410                 struct compat_stat64 __user *statbuf)
 411 {
 412         struct kstat stat;
 413         int error = vfs_lstat(filename, &stat);
 414
 415         if (!error)
 416                 error = cp_compat_stat64(&stat, statbuf);
 417         return error;
 418 }
 419
 420 asmlinkage long compat_sys_fstat64(unsigned int fd,
 421                 struct compat_stat64 __user * statbuf)
 422 {
 423         struct kstat stat;
 424         int error = vfs_fstat(fd, &stat);
 425
 426         if (!error)
 427                 error = cp_compat_stat64(&stat, statbuf);
 428         return error;
 429 }
 430
 431 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 432 {
 433         return sys_sysfs(option, arg1, arg2);
 434 }
 435
 436 struct sysinfo32 {
 437         s32 uptime;
 438         u32 loads[3];
 439         u32 totalram;
 440         u32 freeram;
 441         u32 sharedram;
 442         u32 bufferram;
 443         u32 totalswap;
 444         u32 freeswap;
 445         unsigned short procs;
 446         unsigned short pad;
 447         u32 totalhigh;
 448         u32 freehigh;
 449         u32 mem_unit;
 450         char _f[20-2*sizeof(int)-sizeof(int)];
 451 };
 452
 453 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 454 {
 455         struct sysinfo s;
 456         int ret, err;
 457         int bitcount = 0;
 458         mm_segment_t old_fs = get_fs ();
 459
 460         set_fs(KERNEL_DS);
 461         ret = sys_sysinfo((struct sysinfo __user *) &s);
 462         set_fs(old_fs);
 463         /* Check to see if any memory value is too large for 32-bit and
 464          * scale down if needed.
 465          */
 466         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 467                 while (s.mem_unit < PAGE_SIZE) {
 468                         s.mem_unit <<= 1;
 469                         bitcount++;
 470                 }
 471                 s.totalram >>= bitcount;
 472                 s.freeram >>= bitcount;
 473                 s.sharedram >>= bitcount;
 474                 s.bufferram >>= bitcount;
 475                 s.totalswap >>= bitcount;
 476                 s.freeswap >>= bitcount;
 477                 s.totalhigh >>= bitcount;
 478                 s.freehigh >>= bitcount;
 479         }
 480
 481         err = put_user (s.uptime, &info->uptime);
 482         err |= __put_user (s.loads[0], &info->loads[0]);
 483         err |= __put_user (s.loads[1], &info->loads[1]);
 484         err |= __put_user (s.loads[2], &info->loads[2]);
 485         err |= __put_user (s.totalram, &info->totalram);
 486         err |= __put_user (s.freeram, &info->freeram);
 487         err |= __put_user (s.sharedram, &info->sharedram);
 488         err |= __put_user (s.bufferram, &info->bufferram);
 489         err |= __put_user (s.totalswap, &info->totalswap);
 490         err |= __put_user (s.freeswap, &info->freeswap);
 491         err |= __put_user (s.procs, &info->procs);
 492         err |= __put_user (s.totalhigh, &info->totalhigh);
 493         err |= __put_user (s.freehigh, &info->freehigh);
 494         err |= __put_user (s.mem_unit, &info->mem_unit);
 495         if (err)
 496                 return -EFAULT;
 497         return ret;
 498 }
 499
 500 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 501 {
 502         struct timespec t;
 503         int ret;
 504         mm_segment_t old_fs = get_fs ();
 505
 506         set_fs (KERNEL_DS);
 507         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 508         set_fs (old_fs);
 509         if (put_compat_timespec(&t, interval))
 510                 return -EFAULT;
 511         return ret;
 512 }
 513
 514 asmlinkage long compat_sys_rt_sigprocmask(int how,
 515                                           compat_sigset_t __user *set,
 516                                           compat_sigset_t __user *oset,
 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         if (set) {
 525                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 526                         return -EFAULT;
 527                 switch (_NSIG_WORDS) {
 528                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 529                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 530                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 531                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 532                 }
 533         }
 534         set_fs (KERNEL_DS);
 535         ret = sys_rt_sigprocmask(how,
 536                                  set ? (sigset_t __user *) &s : NULL,
 537                                  oset ? (sigset_t __user *) &s : NULL,
 538                                  sigsetsize);
 539         set_fs (old_fs);
 540         if (ret) return ret;
 541         if (oset) {
 542                 switch (_NSIG_WORDS) {
 543                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 544                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 545                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 546                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 547                 }
 548                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 549                         return -EFAULT;
 550         }
 551         return 0;
 552 }
 553
 554 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 555                                     compat_size_t sigsetsize)
 556 {
 557         sigset_t s;
 558         compat_sigset_t s32;
 559         int ret;
 560         mm_segment_t old_fs = get_fs();
 561
 562         set_fs (KERNEL_DS);
 563         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 564         set_fs (old_fs);
 565         if (!ret) {
 566                 switch (_NSIG_WORDS) {
 567                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 568                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 569                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 570                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 571                 }
 572                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 573                         return -EFAULT;
 574         }
 575         return ret;
 576 }
 577
 578 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 579                                            struct compat_siginfo __user *uinfo)
 580 {
 581         siginfo_t info;
 582         int ret;
 583         mm_segment_t old_fs = get_fs();
 584
 585         if (copy_siginfo_from_user32(&info, uinfo))
 586                 return -EFAULT;
 587
 588         set_fs (KERNEL_DS);
 589         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 590         set_fs (old_fs);
 591         return ret;
 592 }
 593
 594 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 595                                      struct old_sigaction32 __user *oact)
 596 {
 597         struct k_sigaction new_ka, old_ka;
 598         int ret;
 599
 600         if (sig < 0) {
 601                 set_thread_flag(TIF_NEWSIGNALS);
 602                 sig = -sig;
 603         }
 604
 605         if (act) {
 606                 compat_old_sigset_t mask;
 607                 u32 u_handler, u_restorer;
 608
 609                 ret = get_user(u_handler, &act->sa_handler);
 610                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 611                 ret |= __get_user(u_restorer, &act->sa_restorer);
 612                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 613                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 614                 ret |= __get_user(mask, &act->sa_mask);
 615                 if (ret)
 616                         return ret;
 617                 new_ka.ka_restorer = NULL;
 618                 siginitset(&new_ka.sa.sa_mask, mask);
 619         }
 620
 621         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 622
 623         if (!ret && oact) {
 624                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 625                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 626                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 627                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 628         }
 629
 630         return ret;
 631 }
 632
 633 asmlinkage long compat_sys_rt_sigaction(int sig,
 634                                         struct sigaction32 __user *act,
 635                                         struct sigaction32 __user *oact,
 636                                         void __user *restorer,
 637                                         compat_size_t sigsetsize)
 638 {
 639         struct k_sigaction new_ka, old_ka;
 640         int ret;
 641         compat_sigset_t set32;
 642
 643         /* XXX: Don't preclude handling different sized sigset_t's.  */
 644         if (sigsetsize != sizeof(compat_sigset_t))
 645                 return -EINVAL;
 646
 647         /* All tasks which use RT signals (effectively) use
 648          * new style signals.
 649          */
 650         set_thread_flag(TIF_NEWSIGNALS);
 651
 652         if (act) {
 653                 u32 u_handler, u_restorer;
 654
 655                 new_ka.ka_restorer = restorer;
 656                 ret = get_user(u_handler, &act->sa_handler);
 657                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 658                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 659                 switch (_NSIG_WORDS) {
 660                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 661                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 662                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 663                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 664                 }
 665                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 666                 ret |= __get_user(u_restorer, &act->sa_restorer);
 667                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 668                 if (ret)
 669                         return -EFAULT;
 670         }
 671
 672         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 673
 674         if (!ret && oact) {
 675                 switch (_NSIG_WORDS) {
 676                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 677                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 678                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 679                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 680                 }
 681                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 682                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 683                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 684                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 685                 if (ret)
 686                         ret = -EFAULT;
 687         }
 688
 689         return ret;
 690 }
 691
 692 /*
 693  * sparc32_execve() executes a new program after the asm stub has set
 694  * things up for us.  This should basically do what I want it to.
 695  */
 696 asmlinkage long sparc32_execve(struct pt_regs *regs)
 697 {
 698         int error, base = 0;
 699         char *filename;
 700
 701         /* User register window flush is done by entry.S */
 702
 703         /* Check for indirect call. */
 704         if ((u32)regs->u_regs[UREG_G1] == 0)
 705                 base = 1;
 706
 707         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 708         error = PTR_ERR(filename);
 709         if (IS_ERR(filename))
 710                 goto out;
 711
 712         error = compat_do_execve(filename,
 713                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 714                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 715
 716         putname(filename);
 717
 718         if (!error) {
 719                 fprs_write(0);
 720                 current_thread_info()->xfsr[0] = 0;
 721                 current_thread_info()->fpsaved[0] = 0;
 722                 regs->tstate &= ~TSTATE_PEF;
 723                 task_lock(current);
 724                 current->ptrace &= ~PT_DTRACE;
 725                 task_unlock(current);
 726         }
 727 out:
 728         return error;
 729 }
 730
 731 #ifdef CONFIG_MODULES
 732
 733 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 734                                   const char __user *uargs)
 735 {
 736         return sys_init_module(umod, len, uargs);
 737 }
 738
 739 asmlinkage long sys32_delete_module(const char __user *name_user,
 740                                     unsigned int flags)
 741 {
 742         return sys_delete_module(name_user, flags);
 743 }
 744
 745 #else /* CONFIG_MODULES */
 746
 747 asmlinkage long sys32_init_module(const char __user *name_user,
 748                                   struct module __user *mod_user)
 749 {
 750         return -ENOSYS;
 751 }
 752
 753 asmlinkage long sys32_delete_module(const char __user *name_user)
 754 {
 755         return -ENOSYS;
 756 }
 757
 758 #endif  /* CONFIG_MODULES */
 759
 760 /* Translations due to time_t size differences.  Which affects all
 761    sorts of things, like timeval and itimerval.  */
 762
 763 extern struct timezone sys_tz;
 764
 765 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 766                                    struct timezone __user *tz)
 767 {
 768         if (tv) {
 769                 struct timeval ktv;
 770                 do_gettimeofday(&ktv);
 771                 if (put_tv32(tv, &ktv))
 772                         return -EFAULT;
 773         }
 774         if (tz) {
 775                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 776                         return -EFAULT;
 777         }
 778         return 0;
 779 }
 780
 781 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 782 {
 783         long usec;
 784
 785         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 786                 return -EFAULT;
 787         if (__get_user(o->tv_sec, &i->tv_sec))
 788                 return -EFAULT;
 789         if (__get_user(usec, &i->tv_usec))
 790                 return -EFAULT;
 791         o->tv_nsec = usec * 1000;
 792         return 0;
 793 }
 794
 795 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 796                                    struct timezone __user *tz)
 797 {
 798         struct timespec kts;
 799         struct timezone ktz;
 800
 801         if (tv) {
 802                 if (get_ts32(&kts, tv))
 803                         return -EFAULT;
 804         }
 805         if (tz) {
 806                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 807                         return -EFAULT;
 808         }
 809
 810         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 811 }
 812
 813 asmlinkage long sys32_utimes(char __user *filename,
 814                              struct compat_timeval __user *tvs)
 815 {
 816         struct timeval ktvs[2];
 817
 818         if (tvs) {
 819                 if (get_tv32(&ktvs[0], tvs) ||
 820                     get_tv32(&ktvs[1], 1+tvs))
 821                         return -EFAULT;
 822         }
 823
 824         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 825 }
 826
 827 /* These are here just in case some old sparc32 binary calls it. */
 828 asmlinkage long sys32_pause(void)
 829 {
 830         current->state = TASK_INTERRUPTIBLE;
 831         schedule();
 832         return -ERESTARTNOHAND;
 833 }
 834
 835 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 836                                         char __user *ubuf,
 837                                         compat_size_t count,
 838                                         unsigned long poshi,
 839                                         unsigned long poslo)
 840 {
 841         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 842 }
 843
 844 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 845                                          char __user *ubuf,
 846                                          compat_size_t count,
 847                                          unsigned long poshi,
 848                                          unsigned long poslo)
 849 {
 850         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 851 }
 852
 853 asmlinkage long compat_sys_readahead(int fd,
 854                                      unsigned long offhi,
 855                                      unsigned long offlo,
 856                                      compat_size_t count)
 857 {
 858         return sys_readahead(fd, (offhi << 32) | offlo, count);
 859 }
 860
 861 long compat_sys_fadvise64(int fd,
 862                           unsigned long offhi,
 863                           unsigned long offlo,
 864                           compat_size_t len, int advice)
 865 {
 866         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 867 }
 868
 869 long compat_sys_fadvise64_64(int fd,
 870                              unsigned long offhi, unsigned long offlo,
 871                              unsigned long lenhi, unsigned long lenlo,
 872                              int advice)
 873 {
 874         return sys_fadvise64_64(fd,
 875                                 (offhi << 32) | offlo,
 876                                 (lenhi << 32) | lenlo,
 877                                 advice);
 878 }
 879
 880 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 881                                     compat_off_t __user *offset,
 882                                     compat_size_t count)
 883 {
 884         mm_segment_t old_fs = get_fs();
 885         int ret;
 886         off_t of;
 887
 888         if (offset && get_user(of, offset))
 889                 return -EFAULT;
 890
 891         set_fs(KERNEL_DS);
 892         ret = sys_sendfile(out_fd, in_fd,
 893                            offset ? (off_t __user *) &of : NULL,
 894                            count);
 895         set_fs(old_fs);
 896
 897         if (offset && put_user(of, offset))
 898                 return -EFAULT;
 899
 900         return ret;
 901 }
 902
 903 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 904                                       compat_loff_t __user *offset,
 905                                       compat_size_t count)
 906 {
 907         mm_segment_t old_fs = get_fs();
 908         int ret;
 909         loff_t lof;
 910
 911         if (offset && get_user(lof, offset))
 912                 return -EFAULT;
 913
 914         set_fs(KERNEL_DS);
 915         ret = sys_sendfile64(out_fd, in_fd,
 916                              offset ? (loff_t __user *) &lof : NULL,
 917                              count);
 918         set_fs(old_fs);
 919
 920         if (offset && put_user(lof, offset))
 921                 return -EFAULT;
 922
 923         return ret;
 924 }
 925
 926 /* Handle adjtimex compatibility. */
 927
 928 struct timex32 {
 929         u32 modes;
 930         s32 offset, freq, maxerror, esterror;
 931         s32 status, constant, precision, tolerance;
 932         struct compat_timeval time;
 933         s32 tick;
 934         s32 ppsfreq, jitter, shift, stabil;
 935         s32 jitcnt, calcnt, errcnt, stbcnt;
 936         s32  :32; s32  :32; s32  :32; s32  :32;
 937         s32  :32; s32  :32; s32  :32; s32  :32;
 938         s32  :32; s32  :32; s32  :32; s32  :32;
 939 };
 940
 941 extern int do_adjtimex(struct timex *);
 942
 943 asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 944 {
 945         struct timex txc;
 946         int ret;
 947
 948         memset(&txc, 0, sizeof(struct timex));
 949
 950         if (get_user(txc.modes, &utp->modes) ||
 951             __get_user(txc.offset, &utp->offset) ||
 952             __get_user(txc.freq, &utp->freq) ||
 953             __get_user(txc.maxerror, &utp->maxerror) ||
 954             __get_user(txc.esterror, &utp->esterror) ||
 955             __get_user(txc.status, &utp->status) ||
 956             __get_user(txc.constant, &utp->constant) ||
 957             __get_user(txc.precision, &utp->precision) ||
 958             __get_user(txc.tolerance, &utp->tolerance) ||
 959             __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 960             __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 961             __get_user(txc.tick, &utp->tick) ||
 962             __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 963             __get_user(txc.jitter, &utp->jitter) ||
 964             __get_user(txc.shift, &utp->shift) ||
 965             __get_user(txc.stabil, &utp->stabil) ||
 966             __get_user(txc.jitcnt, &utp->jitcnt) ||
 967             __get_user(txc.calcnt, &utp->calcnt) ||
 968             __get_user(txc.errcnt, &utp->errcnt) ||
 969             __get_user(txc.stbcnt, &utp->stbcnt))
 970                 return -EFAULT;
 971
 972         ret = do_adjtimex(&txc);
 973
 974         if (put_user(txc.modes, &utp->modes) ||
 975             __put_user(txc.offset, &utp->offset) ||
 976             __put_user(txc.freq, &utp->freq) ||
 977             __put_user(txc.maxerror, &utp->maxerror) ||
 978             __put_user(txc.esterror, &utp->esterror) ||
 979             __put_user(txc.status, &utp->status) ||
 980             __put_user(txc.constant, &utp->constant) ||
 981             __put_user(txc.precision, &utp->precision) ||
 982             __put_user(txc.tolerance, &utp->tolerance) ||
 983             __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 984             __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 985             __put_user(txc.tick, &utp->tick) ||
 986             __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 987             __put_user(txc.jitter, &utp->jitter) ||
 988             __put_user(txc.shift, &utp->shift) ||
 989             __put_user(txc.stabil, &utp->stabil) ||
 990             __put_user(txc.jitcnt, &utp->jitcnt) ||
 991             __put_user(txc.calcnt, &utp->calcnt) ||
 992             __put_user(txc.errcnt, &utp->errcnt) ||
 993             __put_user(txc.stbcnt, &utp->stbcnt))
 994                 ret = -EFAULT;
 995
 996         return ret;
 997 }
 998
 999 /* This is just a version for 32-bit applications which does
1000  * not force O_LARGEFILE on.
1001  */
1002
1003 asmlinkage long sparc32_open(const char __user *filename,
1004                              int flags, int mode)
1005 {
1006         return do_sys_open(AT_FDCWD, filename, flags, mode);
1007 }
1008
1009 extern unsigned long do_mremap(unsigned long addr,
1010         unsigned long old_len, unsigned long new_len,
1011         unsigned long flags, unsigned long new_addr);
1012
1013 asmlinkage unsigned long sys32_mremap(unsigned long addr,
1014         unsigned long old_len, unsigned long new_len,
1015         unsigned long flags, u32 __new_addr)
1016 {
1017         struct vm_area_struct *vma;
1018         unsigned long ret = -EINVAL;
1019         unsigned long new_addr = __new_addr;
1020
1021         if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
1022                 goto out;
1023         if (addr > 0xf0000000UL - old_len)
1024                 goto out;
1025         down_write(&current->mm->mmap_sem);
1026         if (flags & MREMAP_FIXED) {
1027                 if (new_addr > 0xf0000000UL - new_len)
1028                         goto out_sem;
1029         } else if (addr > 0xf0000000UL - new_len) {
1030                 unsigned long map_flags = 0;
1031                 struct file *file = NULL;
1032
1033                 ret = -ENOMEM;
1034                 if (!(flags & MREMAP_MAYMOVE))
1035                         goto out_sem;
1036
1037                 vma = find_vma(current->mm, addr);
1038                 if (vma) {
1039                         if (vma->vm_flags & VM_SHARED)
1040                                 map_flags |= MAP_SHARED;
1041                         file = vma->vm_file;
1042                 }
1043
1044                 /* MREMAP_FIXED checked above. */
1045                 new_addr = get_unmapped_area(file, addr, new_len,
1046                                     vma ? vma->vm_pgoff : 0,
1047                                     map_flags);
1048                 ret = new_addr;
1049                 if (new_addr & ~PAGE_MASK)
1050                         goto out_sem;
1051                 flags |= MREMAP_FIXED;
1052         }
1053         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1054 out_sem:
1055         up_write(&current->mm->mmap_sem);
1056 out:
1057         return ret;
1058 }
1059
1060 struct __sysctl_args32 {
1061         u32 name;
1062         int nlen;
1063         u32 oldval;
1064         u32 oldlenp;
1065         u32 newval;
1066         u32 newlen;
1067         u32 __unused[4];
1068 };
1069
1070 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1071 {
1072 #ifndef CONFIG_SYSCTL
1073         return -ENOSYS;
1074 #else
1075         struct __sysctl_args32 tmp;
1076         int error;
1077         size_t oldlen, __user *oldlenp = NULL;
1078         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1079
1080         if (copy_from_user(&tmp, args, sizeof(tmp)))
1081                 return -EFAULT;
1082
1083         if (tmp.oldval && tmp.oldlenp) {
1084                 /* Duh, this is ugly and might not work if sysctl_args
1085                    is in read-only memory, but do_sysctl does indirectly
1086                    a lot of uaccess in both directions and we'd have to
1087                    basically copy the whole sysctl.c here, and
1088                    glibc's __sysctl uses rw memory for the structure
1089                    anyway.  */
1090                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1091                     put_user(oldlen, (size_t __user *)addr))
1092                         return -EFAULT;
1093                 oldlenp = (size_t __user *)addr;
1094         }
1095
1096         lock_kernel();
1097         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1098                           tmp.nlen,
1099                           (void __user *)(unsigned long) tmp.oldval,
1100                           oldlenp,
1101                           (void __user *)(unsigned long) tmp.newval,
1102                           tmp.newlen);
1103         unlock_kernel();
1104         if (oldlenp) {
1105                 if (!error) {
1106                         if (get_user(oldlen, (size_t __user *)addr) ||
1107                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1108                                 error = -EFAULT;
1109                 }
1110                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1111                         error = -EFAULT;
1112         }
1113         return error;
1114 #endif
1115 }
1116
1117 long sys32_lookup_dcookie(unsigned long cookie_high,
1118                           unsigned long cookie_low,
1119                           char __user *buf, size_t len)
1120 {
1121         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1122                                   buf, len);
1123 }