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(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 356         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 357         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 358         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 359         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 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 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
 369 {
 370         int err;
 371
 372         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 373         err |= put_user(stat->ino, &statbuf->st_ino);
 374         err |= put_user(stat->mode, &statbuf->st_mode);
 375         err |= put_user(stat->nlink, &statbuf->st_nlink);
 376         err |= put_user(stat->uid, &statbuf->st_uid);
 377         err |= put_user(stat->gid, &statbuf->st_gid);
 378         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 379         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 380         err |= put_user(stat->size, &statbuf->st_size);
 381         err |= put_user(stat->blksize, &statbuf->st_blksize);
 382         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 383         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 384         err |= put_user(stat->blocks, &statbuf->st_blocks);
 385         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 386         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 387         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 388         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 389         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 390         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 391         err |= put_user(0, &statbuf->__unused4);
 392         err |= put_user(0, &statbuf->__unused5);
 393
 394         return err;
 395 }
 396
 397 asmlinkage long compat_sys_stat64(char __user * filename,
 398                 struct compat_stat64 __user *statbuf)
 399 {
 400         struct kstat stat;
 401         int error = vfs_stat(filename, &stat);
 402
 403         if (!error)
 404                 error = cp_compat_stat64(&stat, statbuf);
 405         return error;
 406 }
 407
 408 asmlinkage long compat_sys_lstat64(char __user * filename,
 409                 struct compat_stat64 __user *statbuf)
 410 {
 411         struct kstat stat;
 412         int error = vfs_lstat(filename, &stat);
 413
 414         if (!error)
 415                 error = cp_compat_stat64(&stat, statbuf);
 416         return error;
 417 }
 418
 419 asmlinkage long compat_sys_fstat64(unsigned int fd,
 420                 struct compat_stat64 __user * statbuf)
 421 {
 422         struct kstat stat;
 423         int error = vfs_fstat(fd, &stat);
 424
 425         if (!error)
 426                 error = cp_compat_stat64(&stat, statbuf);
 427         return error;
 428 }
 429
 430 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 431 {
 432         return sys_sysfs(option, arg1, arg2);
 433 }
 434
 435 struct sysinfo32 {
 436         s32 uptime;
 437         u32 loads[3];
 438         u32 totalram;
 439         u32 freeram;
 440         u32 sharedram;
 441         u32 bufferram;
 442         u32 totalswap;
 443         u32 freeswap;
 444         unsigned short procs;
 445         unsigned short pad;
 446         u32 totalhigh;
 447         u32 freehigh;
 448         u32 mem_unit;
 449         char _f[20-2*sizeof(int)-sizeof(int)];
 450 };
 451
 452 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 453 {
 454         struct sysinfo s;
 455         int ret, err;
 456         int bitcount = 0;
 457         mm_segment_t old_fs = get_fs ();
 458
 459         set_fs(KERNEL_DS);
 460         ret = sys_sysinfo((struct sysinfo __user *) &s);
 461         set_fs(old_fs);
 462         /* Check to see if any memory value is too large for 32-bit and
 463          * scale down if needed.
 464          */
 465         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 466                 while (s.mem_unit < PAGE_SIZE) {
 467                         s.mem_unit <<= 1;
 468                         bitcount++;
 469                 }
 470                 s.totalram >>= bitcount;
 471                 s.freeram >>= bitcount;
 472                 s.sharedram >>= bitcount;
 473                 s.bufferram >>= bitcount;
 474                 s.totalswap >>= bitcount;
 475                 s.freeswap >>= bitcount;
 476                 s.totalhigh >>= bitcount;
 477                 s.freehigh >>= bitcount;
 478         }
 479
 480         err = put_user (s.uptime, &info->uptime);
 481         err |= __put_user (s.loads[0], &info->loads[0]);
 482         err |= __put_user (s.loads[1], &info->loads[1]);
 483         err |= __put_user (s.loads[2], &info->loads[2]);
 484         err |= __put_user (s.totalram, &info->totalram);
 485         err |= __put_user (s.freeram, &info->freeram);
 486         err |= __put_user (s.sharedram, &info->sharedram);
 487         err |= __put_user (s.bufferram, &info->bufferram);
 488         err |= __put_user (s.totalswap, &info->totalswap);
 489         err |= __put_user (s.freeswap, &info->freeswap);
 490         err |= __put_user (s.procs, &info->procs);
 491         err |= __put_user (s.totalhigh, &info->totalhigh);
 492         err |= __put_user (s.freehigh, &info->freehigh);
 493         err |= __put_user (s.mem_unit, &info->mem_unit);
 494         if (err)
 495                 return -EFAULT;
 496         return ret;
 497 }
 498
 499 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 500 {
 501         struct timespec t;
 502         int ret;
 503         mm_segment_t old_fs = get_fs ();
 504
 505         set_fs (KERNEL_DS);
 506         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 507         set_fs (old_fs);
 508         if (put_compat_timespec(&t, interval))
 509                 return -EFAULT;
 510         return ret;
 511 }
 512
 513 asmlinkage long compat_sys_rt_sigprocmask(int how,
 514                                           compat_sigset_t __user *set,
 515                                           compat_sigset_t __user *oset,
 516                                           compat_size_t sigsetsize)
 517 {
 518         sigset_t s;
 519         compat_sigset_t s32;
 520         int ret;
 521         mm_segment_t old_fs = get_fs();
 522
 523         if (set) {
 524                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 525                         return -EFAULT;
 526                 switch (_NSIG_WORDS) {
 527                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 528                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 529                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 530                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 531                 }
 532         }
 533         set_fs (KERNEL_DS);
 534         ret = sys_rt_sigprocmask(how,
 535                                  set ? (sigset_t __user *) &s : NULL,
 536                                  oset ? (sigset_t __user *) &s : NULL,
 537                                  sigsetsize);
 538         set_fs (old_fs);
 539         if (ret) return ret;
 540         if (oset) {
 541                 switch (_NSIG_WORDS) {
 542                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 543                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 544                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 545                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 546                 }
 547                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 548                         return -EFAULT;
 549         }
 550         return 0;
 551 }
 552
 553 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 554                                     compat_size_t sigsetsize)
 555 {
 556         sigset_t s;
 557         compat_sigset_t s32;
 558         int ret;
 559         mm_segment_t old_fs = get_fs();
 560
 561         set_fs (KERNEL_DS);
 562         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 563         set_fs (old_fs);
 564         if (!ret) {
 565                 switch (_NSIG_WORDS) {
 566                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 567                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 568                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 569                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 570                 }
 571                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 572                         return -EFAULT;
 573         }
 574         return ret;
 575 }
 576
 577 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 578                                            struct compat_siginfo __user *uinfo)
 579 {
 580         siginfo_t info;
 581         int ret;
 582         mm_segment_t old_fs = get_fs();
 583
 584         if (copy_siginfo_from_user32(&info, uinfo))
 585                 return -EFAULT;
 586
 587         set_fs (KERNEL_DS);
 588         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 589         set_fs (old_fs);
 590         return ret;
 591 }
 592
 593 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 594                                      struct old_sigaction32 __user *oact)
 595 {
 596         struct k_sigaction new_ka, old_ka;
 597         int ret;
 598
 599         if (sig < 0) {
 600                 set_thread_flag(TIF_NEWSIGNALS);
 601                 sig = -sig;
 602         }
 603
 604         if (act) {
 605                 compat_old_sigset_t mask;
 606                 u32 u_handler, u_restorer;
 607
 608                 ret = get_user(u_handler, &act->sa_handler);
 609                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 610                 ret |= __get_user(u_restorer, &act->sa_restorer);
 611                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 612                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 613                 ret |= __get_user(mask, &act->sa_mask);
 614                 if (ret)
 615                         return ret;
 616                 new_ka.ka_restorer = NULL;
 617                 siginitset(&new_ka.sa.sa_mask, mask);
 618         }
 619
 620         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 621
 622         if (!ret && oact) {
 623                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 624                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 625                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 626                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 627         }
 628
 629         return ret;
 630 }
 631
 632 asmlinkage long compat_sys_rt_sigaction(int sig,
 633                                         struct sigaction32 __user *act,
 634                                         struct sigaction32 __user *oact,
 635                                         void __user *restorer,
 636                                         compat_size_t sigsetsize)
 637 {
 638         struct k_sigaction new_ka, old_ka;
 639         int ret;
 640         compat_sigset_t set32;
 641
 642         /* XXX: Don't preclude handling different sized sigset_t's.  */
 643         if (sigsetsize != sizeof(compat_sigset_t))
 644                 return -EINVAL;
 645
 646         /* All tasks which use RT signals (effectively) use
 647          * new style signals.
 648          */
 649         set_thread_flag(TIF_NEWSIGNALS);
 650
 651         if (act) {
 652                 u32 u_handler, u_restorer;
 653
 654                 new_ka.ka_restorer = restorer;
 655                 ret = get_user(u_handler, &act->sa_handler);
 656                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 657                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 658                 switch (_NSIG_WORDS) {
 659                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 660                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 661                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 662                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 663                 }
 664                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 665                 ret |= __get_user(u_restorer, &act->sa_restorer);
 666                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 667                 if (ret)
 668                         return -EFAULT;
 669         }
 670
 671         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 672
 673         if (!ret && oact) {
 674                 switch (_NSIG_WORDS) {
 675                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 676                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 677                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 678                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 679                 }
 680                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 681                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 682                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 683                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 684                 if (ret)
 685                         ret = -EFAULT;
 686         }
 687
 688         return ret;
 689 }
 690
 691 /*
 692  * sparc32_execve() executes a new program after the asm stub has set
 693  * things up for us.  This should basically do what I want it to.
 694  */
 695 asmlinkage long sparc32_execve(struct pt_regs *regs)
 696 {
 697         int error, base = 0;
 698         char *filename;
 699
 700         /* User register window flush is done by entry.S */
 701
 702         /* Check for indirect call. */
 703         if ((u32)regs->u_regs[UREG_G1] == 0)
 704                 base = 1;
 705
 706         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 707         error = PTR_ERR(filename);
 708         if (IS_ERR(filename))
 709                 goto out;
 710
 711         error = compat_do_execve(filename,
 712                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 713                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 714
 715         putname(filename);
 716
 717         if (!error) {
 718                 fprs_write(0);
 719                 current_thread_info()->xfsr[0] = 0;
 720                 current_thread_info()->fpsaved[0] = 0;
 721                 regs->tstate &= ~TSTATE_PEF;
 722                 task_lock(current);
 723                 current->ptrace &= ~PT_DTRACE;
 724                 task_unlock(current);
 725         }
 726 out:
 727         return error;
 728 }
 729
 730 #ifdef CONFIG_MODULES
 731
 732 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 733                                   const char __user *uargs)
 734 {
 735         return sys_init_module(umod, len, uargs);
 736 }
 737
 738 asmlinkage long sys32_delete_module(const char __user *name_user,
 739                                     unsigned int flags)
 740 {
 741         return sys_delete_module(name_user, flags);
 742 }
 743
 744 #else /* CONFIG_MODULES */
 745
 746 asmlinkage long sys32_init_module(const char __user *name_user,
 747                                   struct module __user *mod_user)
 748 {
 749         return -ENOSYS;
 750 }
 751
 752 asmlinkage long sys32_delete_module(const char __user *name_user)
 753 {
 754         return -ENOSYS;
 755 }
 756
 757 #endif  /* CONFIG_MODULES */
 758
 759 /* Translations due to time_t size differences.  Which affects all
 760    sorts of things, like timeval and itimerval.  */
 761
 762 extern struct timezone sys_tz;
 763
 764 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 765                                    struct timezone __user *tz)
 766 {
 767         if (tv) {
 768                 struct timeval ktv;
 769                 do_gettimeofday(&ktv);
 770                 if (put_tv32(tv, &ktv))
 771                         return -EFAULT;
 772         }
 773         if (tz) {
 774                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 775                         return -EFAULT;
 776         }
 777         return 0;
 778 }
 779
 780 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 781 {
 782         long usec;
 783
 784         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 785                 return -EFAULT;
 786         if (__get_user(o->tv_sec, &i->tv_sec))
 787                 return -EFAULT;
 788         if (__get_user(usec, &i->tv_usec))
 789                 return -EFAULT;
 790         o->tv_nsec = usec * 1000;
 791         return 0;
 792 }
 793
 794 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 795                                    struct timezone __user *tz)
 796 {
 797         struct timespec kts;
 798         struct timezone ktz;
 799
 800         if (tv) {
 801                 if (get_ts32(&kts, tv))
 802                         return -EFAULT;
 803         }
 804         if (tz) {
 805                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 806                         return -EFAULT;
 807         }
 808
 809         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 810 }
 811
 812 asmlinkage long sys32_utimes(char __user *filename,
 813                              struct compat_timeval __user *tvs)
 814 {
 815         struct timeval ktvs[2];
 816
 817         if (tvs) {
 818                 if (get_tv32(&ktvs[0], tvs) ||
 819                     get_tv32(&ktvs[1], 1+tvs))
 820                         return -EFAULT;
 821         }
 822
 823         return do_utimes(filename, (tvs ? &ktvs[0] : NULL));
 824 }
 825
 826 /* These are here just in case some old sparc32 binary calls it. */
 827 asmlinkage long sys32_pause(void)
 828 {
 829         current->state = TASK_INTERRUPTIBLE;
 830         schedule();
 831         return -ERESTARTNOHAND;
 832 }
 833
 834 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 835                                         char __user *ubuf,
 836                                         compat_size_t count,
 837                                         unsigned long poshi,
 838                                         unsigned long poslo)
 839 {
 840         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 841 }
 842
 843 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 844                                          char __user *ubuf,
 845                                          compat_size_t count,
 846                                          unsigned long poshi,
 847                                          unsigned long poslo)
 848 {
 849         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 850 }
 851
 852 asmlinkage long compat_sys_readahead(int fd,
 853                                      unsigned long offhi,
 854                                      unsigned long offlo,
 855                                      compat_size_t count)
 856 {
 857         return sys_readahead(fd, (offhi << 32) | offlo, count);
 858 }
 859
 860 long compat_sys_fadvise64(int fd,
 861                           unsigned long offhi,
 862                           unsigned long offlo,
 863                           compat_size_t len, int advice)
 864 {
 865         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 866 }
 867
 868 long compat_sys_fadvise64_64(int fd,
 869                              unsigned long offhi, unsigned long offlo,
 870                              unsigned long lenhi, unsigned long lenlo,
 871                              int advice)
 872 {
 873         return sys_fadvise64_64(fd,
 874                                 (offhi << 32) | offlo,
 875                                 (lenhi << 32) | lenlo,
 876                                 advice);
 877 }
 878
 879 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 880                                     compat_off_t __user *offset,
 881                                     compat_size_t count)
 882 {
 883         mm_segment_t old_fs = get_fs();
 884         int ret;
 885         off_t of;
 886
 887         if (offset && get_user(of, offset))
 888                 return -EFAULT;
 889
 890         set_fs(KERNEL_DS);
 891         ret = sys_sendfile(out_fd, in_fd,
 892                            offset ? (off_t __user *) &of : NULL,
 893                            count);
 894         set_fs(old_fs);
 895
 896         if (offset && put_user(of, offset))
 897                 return -EFAULT;
 898
 899         return ret;
 900 }
 901
 902 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 903                                       compat_loff_t __user *offset,
 904                                       compat_size_t count)
 905 {
 906         mm_segment_t old_fs = get_fs();
 907         int ret;
 908         loff_t lof;
 909
 910         if (offset && get_user(lof, offset))
 911                 return -EFAULT;
 912
 913         set_fs(KERNEL_DS);
 914         ret = sys_sendfile64(out_fd, in_fd,
 915                              offset ? (loff_t __user *) &lof : NULL,
 916                              count);
 917         set_fs(old_fs);
 918
 919         if (offset && put_user(lof, offset))
 920                 return -EFAULT;
 921
 922         return ret;
 923 }
 924
 925 /* Handle adjtimex compatibility. */
 926
 927 struct timex32 {
 928         u32 modes;
 929         s32 offset, freq, maxerror, esterror;
 930         s32 status, constant, precision, tolerance;
 931         struct compat_timeval time;
 932         s32 tick;
 933         s32 ppsfreq, jitter, shift, stabil;
 934         s32 jitcnt, calcnt, errcnt, stbcnt;
 935         s32  :32; s32  :32; s32  :32; s32  :32;
 936         s32  :32; s32  :32; s32  :32; s32  :32;
 937         s32  :32; s32  :32; s32  :32; s32  :32;
 938 };
 939
 940 extern int do_adjtimex(struct timex *);
 941
 942 asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 943 {
 944         struct timex txc;
 945         int ret;
 946
 947         memset(&txc, 0, sizeof(struct timex));
 948
 949         if (get_user(txc.modes, &utp->modes) ||
 950             __get_user(txc.offset, &utp->offset) ||
 951             __get_user(txc.freq, &utp->freq) ||
 952             __get_user(txc.maxerror, &utp->maxerror) ||
 953             __get_user(txc.esterror, &utp->esterror) ||
 954             __get_user(txc.status, &utp->status) ||
 955             __get_user(txc.constant, &utp->constant) ||
 956             __get_user(txc.precision, &utp->precision) ||
 957             __get_user(txc.tolerance, &utp->tolerance) ||
 958             __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 959             __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 960             __get_user(txc.tick, &utp->tick) ||
 961             __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 962             __get_user(txc.jitter, &utp->jitter) ||
 963             __get_user(txc.shift, &utp->shift) ||
 964             __get_user(txc.stabil, &utp->stabil) ||
 965             __get_user(txc.jitcnt, &utp->jitcnt) ||
 966             __get_user(txc.calcnt, &utp->calcnt) ||
 967             __get_user(txc.errcnt, &utp->errcnt) ||
 968             __get_user(txc.stbcnt, &utp->stbcnt))
 969                 return -EFAULT;
 970
 971         ret = do_adjtimex(&txc);
 972
 973         if (put_user(txc.modes, &utp->modes) ||
 974             __put_user(txc.offset, &utp->offset) ||
 975             __put_user(txc.freq, &utp->freq) ||
 976             __put_user(txc.maxerror, &utp->maxerror) ||
 977             __put_user(txc.esterror, &utp->esterror) ||
 978             __put_user(txc.status, &utp->status) ||
 979             __put_user(txc.constant, &utp->constant) ||
 980             __put_user(txc.precision, &utp->precision) ||
 981             __put_user(txc.tolerance, &utp->tolerance) ||
 982             __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 983             __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 984             __put_user(txc.tick, &utp->tick) ||
 985             __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 986             __put_user(txc.jitter, &utp->jitter) ||
 987             __put_user(txc.shift, &utp->shift) ||
 988             __put_user(txc.stabil, &utp->stabil) ||
 989             __put_user(txc.jitcnt, &utp->jitcnt) ||
 990             __put_user(txc.calcnt, &utp->calcnt) ||
 991             __put_user(txc.errcnt, &utp->errcnt) ||
 992             __put_user(txc.stbcnt, &utp->stbcnt))
 993                 ret = -EFAULT;
 994
 995         return ret;
 996 }
 997
 998 /* This is just a version for 32-bit applications which does
 999  * not force O_LARGEFILE on.
1000  */
1001
1002 asmlinkage long sparc32_open(const char __user *filename,
1003                              int flags, int mode)
1004 {
1005         return do_sys_open(filename, flags, mode);
1006 }
1007
1008 extern unsigned long do_mremap(unsigned long addr,
1009         unsigned long old_len, unsigned long new_len,
1010         unsigned long flags, unsigned long new_addr);
1011
1012 asmlinkage unsigned long sys32_mremap(unsigned long addr,
1013         unsigned long old_len, unsigned long new_len,
1014         unsigned long flags, u32 __new_addr)
1015 {
1016         struct vm_area_struct *vma;
1017         unsigned long ret = -EINVAL;
1018         unsigned long new_addr = __new_addr;
1019
1020         if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
1021                 goto out;
1022         if (addr > 0xf0000000UL - old_len)
1023                 goto out;
1024         down_write(&current->mm->mmap_sem);
1025         if (flags & MREMAP_FIXED) {
1026                 if (new_addr > 0xf0000000UL - new_len)
1027                         goto out_sem;
1028         } else if (addr > 0xf0000000UL - new_len) {
1029                 unsigned long map_flags = 0;
1030                 struct file *file = NULL;
1031
1032                 ret = -ENOMEM;
1033                 if (!(flags & MREMAP_MAYMOVE))
1034                         goto out_sem;
1035
1036                 vma = find_vma(current->mm, addr);
1037                 if (vma) {
1038                         if (vma->vm_flags & VM_SHARED)
1039                                 map_flags |= MAP_SHARED;
1040                         file = vma->vm_file;
1041                 }
1042
1043                 /* MREMAP_FIXED checked above. */
1044                 new_addr = get_unmapped_area(file, addr, new_len,
1045                                     vma ? vma->vm_pgoff : 0,
1046                                     map_flags);
1047                 ret = new_addr;
1048                 if (new_addr & ~PAGE_MASK)
1049                         goto out_sem;
1050                 flags |= MREMAP_FIXED;
1051         }
1052         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1053 out_sem:
1054         up_write(&current->mm->mmap_sem);
1055 out:
1056         return ret;
1057 }
1058
1059 struct __sysctl_args32 {
1060         u32 name;
1061         int nlen;
1062         u32 oldval;
1063         u32 oldlenp;
1064         u32 newval;
1065         u32 newlen;
1066         u32 __unused[4];
1067 };
1068
1069 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1070 {
1071 #ifndef CONFIG_SYSCTL
1072         return -ENOSYS;
1073 #else
1074         struct __sysctl_args32 tmp;
1075         int error;
1076         size_t oldlen, __user *oldlenp = NULL;
1077         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1078
1079         if (copy_from_user(&tmp, args, sizeof(tmp)))
1080                 return -EFAULT;
1081
1082         if (tmp.oldval && tmp.oldlenp) {
1083                 /* Duh, this is ugly and might not work if sysctl_args
1084                    is in read-only memory, but do_sysctl does indirectly
1085                    a lot of uaccess in both directions and we'd have to
1086                    basically copy the whole sysctl.c here, and
1087                    glibc's __sysctl uses rw memory for the structure
1088                    anyway.  */
1089                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1090                     put_user(oldlen, (size_t __user *)addr))
1091                         return -EFAULT;
1092                 oldlenp = (size_t __user *)addr;
1093         }
1094
1095         lock_kernel();
1096         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1097                           tmp.nlen,
1098                           (void __user *)(unsigned long) tmp.oldval,
1099                           oldlenp,
1100                           (void __user *)(unsigned long) tmp.newval,
1101                           tmp.newlen);
1102         unlock_kernel();
1103         if (oldlenp) {
1104                 if (!error) {
1105                         if (get_user(oldlen, (size_t __user *)addr) ||
1106                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1107                                 error = -EFAULT;
1108                 }
1109                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1110                         error = -EFAULT;
1111         }
1112         return error;
1113 #endif
1114 }
1115
1116 long sys32_lookup_dcookie(unsigned long cookie_high,
1117                           unsigned long cookie_low,
1118                           char __user *buf, size_t len)
1119 {
1120         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1121                                   buf, len);
1122 }