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 struct sysinfo32 {
 463         s32 uptime;
 464         u32 loads[3];
 465         u32 totalram;
 466         u32 freeram;
 467         u32 sharedram;
 468         u32 bufferram;
 469         u32 totalswap;
 470         u32 freeswap;
 471         unsigned short procs;
 472         unsigned short pad;
 473         u32 totalhigh;
 474         u32 freehigh;
 475         u32 mem_unit;
 476         char _f[20-2*sizeof(int)-sizeof(int)];
 477 };
 478
 479 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 480 {
 481         struct sysinfo s;
 482         int ret, err;
 483         int bitcount = 0;
 484         mm_segment_t old_fs = get_fs ();
 485
 486         set_fs(KERNEL_DS);
 487         ret = sys_sysinfo((struct sysinfo __user *) &s);
 488         set_fs(old_fs);
 489         /* Check to see if any memory value is too large for 32-bit and
 490          * scale down if needed.
 491          */
 492         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 493                 while (s.mem_unit < PAGE_SIZE) {
 494                         s.mem_unit <<= 1;
 495                         bitcount++;
 496                 }
 497                 s.totalram >>= bitcount;
 498                 s.freeram >>= bitcount;
 499                 s.sharedram >>= bitcount;
 500                 s.bufferram >>= bitcount;
 501                 s.totalswap >>= bitcount;
 502                 s.freeswap >>= bitcount;
 503                 s.totalhigh >>= bitcount;
 504                 s.freehigh >>= bitcount;
 505         }
 506
 507         err = put_user (s.uptime, &info->uptime);
 508         err |= __put_user (s.loads[0], &info->loads[0]);
 509         err |= __put_user (s.loads[1], &info->loads[1]);
 510         err |= __put_user (s.loads[2], &info->loads[2]);
 511         err |= __put_user (s.totalram, &info->totalram);
 512         err |= __put_user (s.freeram, &info->freeram);
 513         err |= __put_user (s.sharedram, &info->sharedram);
 514         err |= __put_user (s.bufferram, &info->bufferram);
 515         err |= __put_user (s.totalswap, &info->totalswap);
 516         err |= __put_user (s.freeswap, &info->freeswap);
 517         err |= __put_user (s.procs, &info->procs);
 518         err |= __put_user (s.totalhigh, &info->totalhigh);
 519         err |= __put_user (s.freehigh, &info->freehigh);
 520         err |= __put_user (s.mem_unit, &info->mem_unit);
 521         if (err)
 522                 return -EFAULT;
 523         return ret;
 524 }
 525
 526 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 527 {
 528         struct timespec t;
 529         int ret;
 530         mm_segment_t old_fs = get_fs ();
 531
 532         set_fs (KERNEL_DS);
 533         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 534         set_fs (old_fs);
 535         if (put_compat_timespec(&t, interval))
 536                 return -EFAULT;
 537         return ret;
 538 }
 539
 540 asmlinkage long compat_sys_rt_sigprocmask(int how,
 541                                           compat_sigset_t __user *set,
 542                                           compat_sigset_t __user *oset,
 543                                           compat_size_t sigsetsize)
 544 {
 545         sigset_t s;
 546         compat_sigset_t s32;
 547         int ret;
 548         mm_segment_t old_fs = get_fs();
 549
 550         if (set) {
 551                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 552                         return -EFAULT;
 553                 switch (_NSIG_WORDS) {
 554                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 555                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 556                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 557                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 558                 }
 559         }
 560         set_fs (KERNEL_DS);
 561         ret = sys_rt_sigprocmask(how,
 562                                  set ? (sigset_t __user *) &s : NULL,
 563                                  oset ? (sigset_t __user *) &s : NULL,
 564                                  sigsetsize);
 565         set_fs (old_fs);
 566         if (ret) return ret;
 567         if (oset) {
 568                 switch (_NSIG_WORDS) {
 569                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 570                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 571                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 572                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 573                 }
 574                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 575                         return -EFAULT;
 576         }
 577         return 0;
 578 }
 579
 580 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 581                                     compat_size_t sigsetsize)
 582 {
 583         sigset_t s;
 584         compat_sigset_t s32;
 585         int ret;
 586         mm_segment_t old_fs = get_fs();
 587
 588         set_fs (KERNEL_DS);
 589         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 590         set_fs (old_fs);
 591         if (!ret) {
 592                 switch (_NSIG_WORDS) {
 593                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 594                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 595                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 596                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 597                 }
 598                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 599                         return -EFAULT;
 600         }
 601         return ret;
 602 }
 603
 604 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 605                                            struct compat_siginfo __user *uinfo)
 606 {
 607         siginfo_t info;
 608         int ret;
 609         mm_segment_t old_fs = get_fs();
 610
 611         if (copy_siginfo_from_user32(&info, uinfo))
 612                 return -EFAULT;
 613
 614         set_fs (KERNEL_DS);
 615         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 616         set_fs (old_fs);
 617         return ret;
 618 }
 619
 620 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 621                                      struct old_sigaction32 __user *oact)
 622 {
 623         struct k_sigaction new_ka, old_ka;
 624         int ret;
 625
 626         if (sig < 0) {
 627                 set_thread_flag(TIF_NEWSIGNALS);
 628                 sig = -sig;
 629         }
 630
 631         if (act) {
 632                 compat_old_sigset_t mask;
 633                 u32 u_handler, u_restorer;
 634
 635                 ret = get_user(u_handler, &act->sa_handler);
 636                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 637                 ret |= __get_user(u_restorer, &act->sa_restorer);
 638                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 639                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 640                 ret |= __get_user(mask, &act->sa_mask);
 641                 if (ret)
 642                         return ret;
 643                 new_ka.ka_restorer = NULL;
 644                 siginitset(&new_ka.sa.sa_mask, mask);
 645         }
 646
 647         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 648
 649         if (!ret && oact) {
 650                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 651                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 652                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 653                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 654         }
 655
 656         return ret;
 657 }
 658
 659 asmlinkage long compat_sys_rt_sigaction(int sig,
 660                                         struct sigaction32 __user *act,
 661                                         struct sigaction32 __user *oact,
 662                                         void __user *restorer,
 663                                         compat_size_t sigsetsize)
 664 {
 665         struct k_sigaction new_ka, old_ka;
 666         int ret;
 667         compat_sigset_t set32;
 668
 669         /* XXX: Don't preclude handling different sized sigset_t's.  */
 670         if (sigsetsize != sizeof(compat_sigset_t))
 671                 return -EINVAL;
 672
 673         /* All tasks which use RT signals (effectively) use
 674          * new style signals.
 675          */
 676         set_thread_flag(TIF_NEWSIGNALS);
 677
 678         if (act) {
 679                 u32 u_handler, u_restorer;
 680
 681                 new_ka.ka_restorer = restorer;
 682                 ret = get_user(u_handler, &act->sa_handler);
 683                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 684                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 685                 switch (_NSIG_WORDS) {
 686                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 687                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 688                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 689                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 690                 }
 691                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 692                 ret |= __get_user(u_restorer, &act->sa_restorer);
 693                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 694                 if (ret)
 695                         return -EFAULT;
 696         }
 697
 698         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 699
 700         if (!ret && oact) {
 701                 switch (_NSIG_WORDS) {
 702                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 703                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 704                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 705                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 706                 }
 707                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 708                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 709                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 710                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 711                 if (ret)
 712                         ret = -EFAULT;
 713         }
 714
 715         return ret;
 716 }
 717
 718 /*
 719  * sparc32_execve() executes a new program after the asm stub has set
 720  * things up for us.  This should basically do what I want it to.
 721  */
 722 asmlinkage long sparc32_execve(struct pt_regs *regs)
 723 {
 724         int error, base = 0;
 725         char *filename;
 726
 727         /* User register window flush is done by entry.S */
 728
 729         /* Check for indirect call. */
 730         if ((u32)regs->u_regs[UREG_G1] == 0)
 731                 base = 1;
 732
 733         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 734         error = PTR_ERR(filename);
 735         if (IS_ERR(filename))
 736                 goto out;
 737
 738         error = compat_do_execve(filename,
 739                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 740                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 741
 742         putname(filename);
 743
 744         if (!error) {
 745                 fprs_write(0);
 746                 current_thread_info()->xfsr[0] = 0;
 747                 current_thread_info()->fpsaved[0] = 0;
 748                 regs->tstate &= ~TSTATE_PEF;
 749                 task_lock(current);
 750                 current->ptrace &= ~PT_DTRACE;
 751                 task_unlock(current);
 752         }
 753 out:
 754         return error;
 755 }
 756
 757 #ifdef CONFIG_MODULES
 758
 759 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 760                                   const char __user *uargs)
 761 {
 762         return sys_init_module(umod, len, uargs);
 763 }
 764
 765 asmlinkage long sys32_delete_module(const char __user *name_user,
 766                                     unsigned int flags)
 767 {
 768         return sys_delete_module(name_user, flags);
 769 }
 770
 771 #else /* CONFIG_MODULES */
 772
 773 asmlinkage long sys32_init_module(const char __user *name_user,
 774                                   struct module __user *mod_user)
 775 {
 776         return -ENOSYS;
 777 }
 778
 779 asmlinkage long sys32_delete_module(const char __user *name_user)
 780 {
 781         return -ENOSYS;
 782 }
 783
 784 #endif  /* CONFIG_MODULES */
 785
 786 /* Translations due to time_t size differences.  Which affects all
 787    sorts of things, like timeval and itimerval.  */
 788
 789 extern struct timezone sys_tz;
 790
 791 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 792                                    struct timezone __user *tz)
 793 {
 794         if (tv) {
 795                 struct timeval ktv;
 796                 do_gettimeofday(&ktv);
 797                 if (put_tv32(tv, &ktv))
 798                         return -EFAULT;
 799         }
 800         if (tz) {
 801                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 802                         return -EFAULT;
 803         }
 804         return 0;
 805 }
 806
 807 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 808 {
 809         long usec;
 810
 811         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 812                 return -EFAULT;
 813         if (__get_user(o->tv_sec, &i->tv_sec))
 814                 return -EFAULT;
 815         if (__get_user(usec, &i->tv_usec))
 816                 return -EFAULT;
 817         o->tv_nsec = usec * 1000;
 818         return 0;
 819 }
 820
 821 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 822                                    struct timezone __user *tz)
 823 {
 824         struct timespec kts;
 825         struct timezone ktz;
 826
 827         if (tv) {
 828                 if (get_ts32(&kts, tv))
 829                         return -EFAULT;
 830         }
 831         if (tz) {
 832                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 833                         return -EFAULT;
 834         }
 835
 836         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 837 }
 838
 839 asmlinkage long sys32_utimes(char __user *filename,
 840                              struct compat_timeval __user *tvs)
 841 {
 842         struct timeval ktvs[2];
 843
 844         if (tvs) {
 845                 if (get_tv32(&ktvs[0], tvs) ||
 846                     get_tv32(&ktvs[1], 1+tvs))
 847                         return -EFAULT;
 848         }
 849
 850         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 851 }
 852
 853 /* These are here just in case some old sparc32 binary calls it. */
 854 asmlinkage long sys32_pause(void)
 855 {
 856         current->state = TASK_INTERRUPTIBLE;
 857         schedule();
 858         return -ERESTARTNOHAND;
 859 }
 860
 861 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 862                                         char __user *ubuf,
 863                                         compat_size_t count,
 864                                         unsigned long poshi,
 865                                         unsigned long poslo)
 866 {
 867         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 868 }
 869
 870 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 871                                          char __user *ubuf,
 872                                          compat_size_t count,
 873                                          unsigned long poshi,
 874                                          unsigned long poslo)
 875 {
 876         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 877 }
 878
 879 asmlinkage long compat_sys_readahead(int fd,
 880                                      unsigned long offhi,
 881                                      unsigned long offlo,
 882                                      compat_size_t count)
 883 {
 884         return sys_readahead(fd, (offhi << 32) | offlo, count);
 885 }
 886
 887 long compat_sys_fadvise64(int fd,
 888                           unsigned long offhi,
 889                           unsigned long offlo,
 890                           compat_size_t len, int advice)
 891 {
 892         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 893 }
 894
 895 long compat_sys_fadvise64_64(int fd,
 896                              unsigned long offhi, unsigned long offlo,
 897                              unsigned long lenhi, unsigned long lenlo,
 898                              int advice)
 899 {
 900         return sys_fadvise64_64(fd,
 901                                 (offhi << 32) | offlo,
 902                                 (lenhi << 32) | lenlo,
 903                                 advice);
 904 }
 905
 906 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 907                                     compat_off_t __user *offset,
 908                                     compat_size_t count)
 909 {
 910         mm_segment_t old_fs = get_fs();
 911         int ret;
 912         off_t of;
 913
 914         if (offset && get_user(of, offset))
 915                 return -EFAULT;
 916
 917         set_fs(KERNEL_DS);
 918         ret = sys_sendfile(out_fd, in_fd,
 919                            offset ? (off_t __user *) &of : NULL,
 920                            count);
 921         set_fs(old_fs);
 922
 923         if (offset && put_user(of, offset))
 924                 return -EFAULT;
 925
 926         return ret;
 927 }
 928
 929 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 930                                       compat_loff_t __user *offset,
 931                                       compat_size_t count)
 932 {
 933         mm_segment_t old_fs = get_fs();
 934         int ret;
 935         loff_t lof;
 936
 937         if (offset && get_user(lof, offset))
 938                 return -EFAULT;
 939
 940         set_fs(KERNEL_DS);
 941         ret = sys_sendfile64(out_fd, in_fd,
 942                              offset ? (loff_t __user *) &lof : NULL,
 943                              count);
 944         set_fs(old_fs);
 945
 946         if (offset && put_user(lof, offset))
 947                 return -EFAULT;
 948
 949         return ret;
 950 }
 951
 952 /* This is just a version for 32-bit applications which does
 953  * not force O_LARGEFILE on.
 954  */
 955
 956 asmlinkage long sparc32_open(const char __user *filename,
 957                              int flags, int mode)
 958 {
 959         return do_sys_open(AT_FDCWD, filename, flags, mode);
 960 }
 961
 962 extern unsigned long do_mremap(unsigned long addr,
 963         unsigned long old_len, unsigned long new_len,
 964         unsigned long flags, unsigned long new_addr);
 965
 966 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 967         unsigned long old_len, unsigned long new_len,
 968         unsigned long flags, u32 __new_addr)
 969 {
 970         struct vm_area_struct *vma;
 971         unsigned long ret = -EINVAL;
 972         unsigned long new_addr = __new_addr;
 973
 974         if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
 975                 goto out;
 976         if (addr > STACK_TOP32 - old_len)
 977                 goto out;
 978         down_write(&current->mm->mmap_sem);
 979         if (flags & MREMAP_FIXED) {
 980                 if (new_addr > STACK_TOP32 - new_len)
 981                         goto out_sem;
 982         } else if (addr > STACK_TOP32 - new_len) {
 983                 unsigned long map_flags = 0;
 984                 struct file *file = NULL;
 985
 986                 ret = -ENOMEM;
 987                 if (!(flags & MREMAP_MAYMOVE))
 988                         goto out_sem;
 989
 990                 vma = find_vma(current->mm, addr);
 991                 if (vma) {
 992                         if (vma->vm_flags & VM_SHARED)
 993                                 map_flags |= MAP_SHARED;
 994                         file = vma->vm_file;
 995                 }
 996
 997                 /* MREMAP_FIXED checked above. */
 998                 new_addr = get_unmapped_area(file, addr, new_len,
 999                                     vma ? vma->vm_pgoff : 0,
1000                                     map_flags);
1001                 ret = new_addr;
1002                 if (new_addr & ~PAGE_MASK)
1003                         goto out_sem;
1004                 flags |= MREMAP_FIXED;
1005         }
1006         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1007 out_sem:
1008         up_write(&current->mm->mmap_sem);
1009 out:
1010         return ret;
1011 }
1012
1013 struct __sysctl_args32 {
1014         u32 name;
1015         int nlen;
1016         u32 oldval;
1017         u32 oldlenp;
1018         u32 newval;
1019         u32 newlen;
1020         u32 __unused[4];
1021 };
1022
1023 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1024 {
1025 #ifndef CONFIG_SYSCTL_SYSCALL
1026         return -ENOSYS;
1027 #else
1028         struct __sysctl_args32 tmp;
1029         int error;
1030         size_t oldlen, __user *oldlenp = NULL;
1031         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1032
1033         if (copy_from_user(&tmp, args, sizeof(tmp)))
1034                 return -EFAULT;
1035
1036         if (tmp.oldval && tmp.oldlenp) {
1037                 /* Duh, this is ugly and might not work if sysctl_args
1038                    is in read-only memory, but do_sysctl does indirectly
1039                    a lot of uaccess in both directions and we'd have to
1040                    basically copy the whole sysctl.c here, and
1041                    glibc's __sysctl uses rw memory for the structure
1042                    anyway.  */
1043                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1044                     put_user(oldlen, (size_t __user *)addr))
1045                         return -EFAULT;
1046                 oldlenp = (size_t __user *)addr;
1047         }
1048
1049         lock_kernel();
1050         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1051                           tmp.nlen,
1052                           (void __user *)(unsigned long) tmp.oldval,
1053                           oldlenp,
1054                           (void __user *)(unsigned long) tmp.newval,
1055                           tmp.newlen);
1056         unlock_kernel();
1057         if (oldlenp) {
1058                 if (!error) {
1059                         if (get_user(oldlen, (size_t __user *)addr) ||
1060                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1061                                 error = -EFAULT;
1062                 }
1063                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1064                         error = -EFAULT;
1065         }
1066         return error;
1067 #endif
1068 }
1069
1070 long sys32_lookup_dcookie(unsigned long cookie_high,
1071                           unsigned long cookie_low,
1072                           char __user *buf, size_t len)
1073 {
1074         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1075                                   buf, len);
1076 }
1077
1078 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)
1079 {
1080         return sys_sync_file_range(fd,
1081                                    (off_high << 32) | off_low,
1082                                    (nb_high << 32) | nb_low,
1083                                    flags);
1084 }