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 #include <asm/a.out.h>
  66
  67 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
  68 {
  69         return sys_chown(filename, low2highuid(user), low2highgid(group));
  70 }
  71
  72 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
  73 {
  74         return sys_lchown(filename, low2highuid(user), low2highgid(group));
  75 }
  76
  77 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
  78 {
  79         return sys_fchown(fd, low2highuid(user), low2highgid(group));
  80 }
  81
  82 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
  83 {
  84         return sys_setregid(low2highgid(rgid), low2highgid(egid));
  85 }
  86
  87 asmlinkage long sys32_setgid16(u16 gid)
  88 {
  89         return sys_setgid((gid_t)gid);
  90 }
  91
  92 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
  93 {
  94         return sys_setreuid(low2highuid(ruid), low2highuid(euid));
  95 }
  96
  97 asmlinkage long sys32_setuid16(u16 uid)
  98 {
  99         return sys_setuid((uid_t)uid);
 100 }
 101
 102 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
 103 {
 104         return sys_setresuid(low2highuid(ruid), low2highuid(euid),
 105                 low2highuid(suid));
 106 }
 107
 108 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
 109 {
 110         int retval;
 111
 112         if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
 113             !(retval = put_user(high2lowuid(current->euid), euid)))
 114                 retval = put_user(high2lowuid(current->suid), suid);
 115
 116         return retval;
 117 }
 118
 119 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
 120 {
 121         return sys_setresgid(low2highgid(rgid), low2highgid(egid),
 122                 low2highgid(sgid));
 123 }
 124
 125 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
 126 {
 127         int retval;
 128
 129         if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
 130             !(retval = put_user(high2lowgid(current->egid), egid)))
 131                 retval = put_user(high2lowgid(current->sgid), sgid);
 132
 133         return retval;
 134 }
 135
 136 asmlinkage long sys32_setfsuid16(u16 uid)
 137 {
 138         return sys_setfsuid((uid_t)uid);
 139 }
 140
 141 asmlinkage long sys32_setfsgid16(u16 gid)
 142 {
 143         return sys_setfsgid((gid_t)gid);
 144 }
 145
 146 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
 147 {
 148         int i;
 149         u16 group;
 150
 151         for (i = 0; i < group_info->ngroups; i++) {
 152                 group = (u16)GROUP_AT(group_info, i);
 153                 if (put_user(group, grouplist+i))
 154                         return -EFAULT;
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
 161 {
 162         int i;
 163         u16 group;
 164
 165         for (i = 0; i < group_info->ngroups; i++) {
 166                 if (get_user(group, grouplist+i))
 167                         return  -EFAULT;
 168                 GROUP_AT(group_info, i) = (gid_t)group;
 169         }
 170
 171         return 0;
 172 }
 173
 174 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
 175 {
 176         int i;
 177
 178         if (gidsetsize < 0)
 179                 return -EINVAL;
 180
 181         get_group_info(current->group_info);
 182         i = current->group_info->ngroups;
 183         if (gidsetsize) {
 184                 if (i > gidsetsize) {
 185                         i = -EINVAL;
 186                         goto out;
 187                 }
 188                 if (groups16_to_user(grouplist, current->group_info)) {
 189                         i = -EFAULT;
 190                         goto out;
 191                 }
 192         }
 193 out:
 194         put_group_info(current->group_info);
 195         return i;
 196 }
 197
 198 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 199 {
 200         struct group_info *group_info;
 201         int retval;
 202
 203         if (!capable(CAP_SETGID))
 204                 return -EPERM;
 205         if ((unsigned)gidsetsize > NGROUPS_MAX)
 206                 return -EINVAL;
 207
 208         group_info = groups_alloc(gidsetsize);
 209         if (!group_info)
 210                 return -ENOMEM;
 211         retval = groups16_from_user(group_info, grouplist);
 212         if (retval) {
 213                 put_group_info(group_info);
 214                 return retval;
 215         }
 216
 217         retval = set_current_groups(group_info);
 218         put_group_info(group_info);
 219
 220         return retval;
 221 }
 222
 223 asmlinkage long sys32_getuid16(void)
 224 {
 225         return high2lowuid(current->uid);
 226 }
 227
 228 asmlinkage long sys32_geteuid16(void)
 229 {
 230         return high2lowuid(current->euid);
 231 }
 232
 233 asmlinkage long sys32_getgid16(void)
 234 {
 235         return high2lowgid(current->gid);
 236 }
 237
 238 asmlinkage long sys32_getegid16(void)
 239 {
 240         return high2lowgid(current->egid);
 241 }
 242
 243 /* 32-bit timeval and related flotsam.  */
 244
 245 static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
 246 {
 247         return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
 248                 (__get_user(o->tv_sec, &i->tv_sec) |
 249                  __get_user(o->tv_usec, &i->tv_usec)));
 250 }
 251
 252 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 253 {
 254         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 255                 (__put_user(i->tv_sec, &o->tv_sec) |
 256                  __put_user(i->tv_usec, &o->tv_usec)));
 257 }
 258
 259 #ifdef CONFIG_SYSVIPC
 260 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
 261 {
 262         int version;
 263
 264         version = call >> 16; /* hack for backward compatibility */
 265         call &= 0xffff;
 266
 267         switch (call) {
 268         case SEMTIMEDOP:
 269                 if (fifth)
 270                         /* sign extend semid */
 271                         return compat_sys_semtimedop((int)first,
 272                                                      compat_ptr(ptr), second,
 273                                                      compat_ptr(fifth));
 274                 /* else fall through for normal semop() */
 275         case SEMOP:
 276                 /* struct sembuf is the same on 32 and 64bit :)) */
 277                 /* sign extend semid */
 278                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 279                                       NULL);
 280         case SEMGET:
 281                 /* sign extend key, nsems */
 282                 return sys_semget((int)first, (int)second, third);
 283         case SEMCTL:
 284                 /* sign extend semid, semnum */
 285                 return compat_sys_semctl((int)first, (int)second, third,
 286                                          compat_ptr(ptr));
 287
 288         case MSGSND:
 289                 /* sign extend msqid */
 290                 return compat_sys_msgsnd((int)first, (int)second, third,
 291                                          compat_ptr(ptr));
 292         case MSGRCV:
 293                 /* sign extend msqid, msgtyp */
 294                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 295                                          third, version, compat_ptr(ptr));
 296         case MSGGET:
 297                 /* sign extend key */
 298                 return sys_msgget((int)first, second);
 299         case MSGCTL:
 300                 /* sign extend msqid */
 301                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 302
 303         case SHMAT:
 304                 /* sign extend shmid */
 305                 return compat_sys_shmat((int)first, second, third, version,
 306                                         compat_ptr(ptr));
 307         case SHMDT:
 308                 return sys_shmdt(compat_ptr(ptr));
 309         case SHMGET:
 310                 /* sign extend key_t */
 311                 return sys_shmget((int)first, second, third);
 312         case SHMCTL:
 313                 /* sign extend shmid */
 314                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 315
 316         default:
 317                 return -ENOSYS;
 318         };
 319
 320         return -ENOSYS;
 321 }
 322 #endif
 323
 324 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 325 {
 326         if ((int)high < 0)
 327                 return -EINVAL;
 328         else
 329                 return sys_truncate(path, (high << 32) | low);
 330 }
 331
 332 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 333 {
 334         if ((int)high < 0)
 335                 return -EINVAL;
 336         else
 337                 return sys_ftruncate(fd, (high << 32) | low);
 338 }
 339
 340 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 341 {
 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         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 349         err |= put_user(stat->ino, &statbuf->st_ino);
 350         err |= put_user(stat->mode, &statbuf->st_mode);
 351         err |= put_user(stat->nlink, &statbuf->st_nlink);
 352         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 353         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 354         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 355         err |= put_user(stat->size, &statbuf->st_size);
 356         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 357         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 358         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 359         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 360         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 361         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 362         err |= put_user(stat->blksize, &statbuf->st_blksize);
 363         err |= put_user(stat->blocks, &statbuf->st_blocks);
 364         err |= put_user(0, &statbuf->__unused4[0]);
 365         err |= put_user(0, &statbuf->__unused4[1]);
 366
 367         return err;
 368 }
 369
 370 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
 371 {
 372         int err;
 373
 374         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 375         err |= put_user(stat->ino, &statbuf->st_ino);
 376         err |= put_user(stat->mode, &statbuf->st_mode);
 377         err |= put_user(stat->nlink, &statbuf->st_nlink);
 378         err |= put_user(stat->uid, &statbuf->st_uid);
 379         err |= put_user(stat->gid, &statbuf->st_gid);
 380         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 381         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 382         err |= put_user(stat->size, &statbuf->st_size);
 383         err |= put_user(stat->blksize, &statbuf->st_blksize);
 384         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 385         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 386         err |= put_user(stat->blocks, &statbuf->st_blocks);
 387         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 388         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 389         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 390         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 391         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 392         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 393         err |= put_user(0, &statbuf->__unused4);
 394         err |= put_user(0, &statbuf->__unused5);
 395
 396         return err;
 397 }
 398
 399 asmlinkage long compat_sys_stat64(char __user * filename,
 400                 struct compat_stat64 __user *statbuf)
 401 {
 402         struct kstat stat;
 403         int error = vfs_stat(filename, &stat);
 404
 405         if (!error)
 406                 error = cp_compat_stat64(&stat, statbuf);
 407         return error;
 408 }
 409
 410 asmlinkage long compat_sys_lstat64(char __user * filename,
 411                 struct compat_stat64 __user *statbuf)
 412 {
 413         struct kstat stat;
 414         int error = vfs_lstat(filename, &stat);
 415
 416         if (!error)
 417                 error = cp_compat_stat64(&stat, statbuf);
 418         return error;
 419 }
 420
 421 asmlinkage long compat_sys_fstat64(unsigned int fd,
 422                 struct compat_stat64 __user * statbuf)
 423 {
 424         struct kstat stat;
 425         int error = vfs_fstat(fd, &stat);
 426
 427         if (!error)
 428                 error = cp_compat_stat64(&stat, statbuf);
 429         return error;
 430 }
 431
 432 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
 433                 struct compat_stat64 __user * statbuf, int flag)
 434 {
 435         struct kstat stat;
 436         int error = -EINVAL;
 437
 438         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 439                 goto out;
 440
 441         if (flag & AT_SYMLINK_NOFOLLOW)
 442                 error = vfs_lstat_fd(dfd, filename, &stat);
 443         else
 444                 error = vfs_stat_fd(dfd, filename, &stat);
 445
 446         if (!error)
 447                 error = cp_compat_stat64(&stat, statbuf);
 448
 449 out:
 450         return error;
 451 }
 452
 453 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 454 {
 455         return sys_sysfs(option, arg1, arg2);
 456 }
 457
 458 struct sysinfo32 {
 459         s32 uptime;
 460         u32 loads[3];
 461         u32 totalram;
 462         u32 freeram;
 463         u32 sharedram;
 464         u32 bufferram;
 465         u32 totalswap;
 466         u32 freeswap;
 467         unsigned short procs;
 468         unsigned short pad;
 469         u32 totalhigh;
 470         u32 freehigh;
 471         u32 mem_unit;
 472         char _f[20-2*sizeof(int)-sizeof(int)];
 473 };
 474
 475 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 476 {
 477         struct sysinfo s;
 478         int ret, err;
 479         int bitcount = 0;
 480         mm_segment_t old_fs = get_fs ();
 481
 482         set_fs(KERNEL_DS);
 483         ret = sys_sysinfo((struct sysinfo __user *) &s);
 484         set_fs(old_fs);
 485         /* Check to see if any memory value is too large for 32-bit and
 486          * scale down if needed.
 487          */
 488         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 489                 while (s.mem_unit < PAGE_SIZE) {
 490                         s.mem_unit <<= 1;
 491                         bitcount++;
 492                 }
 493                 s.totalram >>= bitcount;
 494                 s.freeram >>= bitcount;
 495                 s.sharedram >>= bitcount;
 496                 s.bufferram >>= bitcount;
 497                 s.totalswap >>= bitcount;
 498                 s.freeswap >>= bitcount;
 499                 s.totalhigh >>= bitcount;
 500                 s.freehigh >>= bitcount;
 501         }
 502
 503         err = put_user (s.uptime, &info->uptime);
 504         err |= __put_user (s.loads[0], &info->loads[0]);
 505         err |= __put_user (s.loads[1], &info->loads[1]);
 506         err |= __put_user (s.loads[2], &info->loads[2]);
 507         err |= __put_user (s.totalram, &info->totalram);
 508         err |= __put_user (s.freeram, &info->freeram);
 509         err |= __put_user (s.sharedram, &info->sharedram);
 510         err |= __put_user (s.bufferram, &info->bufferram);
 511         err |= __put_user (s.totalswap, &info->totalswap);
 512         err |= __put_user (s.freeswap, &info->freeswap);
 513         err |= __put_user (s.procs, &info->procs);
 514         err |= __put_user (s.totalhigh, &info->totalhigh);
 515         err |= __put_user (s.freehigh, &info->freehigh);
 516         err |= __put_user (s.mem_unit, &info->mem_unit);
 517         if (err)
 518                 return -EFAULT;
 519         return ret;
 520 }
 521
 522 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 523 {
 524         struct timespec t;
 525         int ret;
 526         mm_segment_t old_fs = get_fs ();
 527
 528         set_fs (KERNEL_DS);
 529         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 530         set_fs (old_fs);
 531         if (put_compat_timespec(&t, interval))
 532                 return -EFAULT;
 533         return ret;
 534 }
 535
 536 asmlinkage long compat_sys_rt_sigprocmask(int how,
 537                                           compat_sigset_t __user *set,
 538                                           compat_sigset_t __user *oset,
 539                                           compat_size_t sigsetsize)
 540 {
 541         sigset_t s;
 542         compat_sigset_t s32;
 543         int ret;
 544         mm_segment_t old_fs = get_fs();
 545
 546         if (set) {
 547                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 548                         return -EFAULT;
 549                 switch (_NSIG_WORDS) {
 550                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 551                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 552                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 553                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 554                 }
 555         }
 556         set_fs (KERNEL_DS);
 557         ret = sys_rt_sigprocmask(how,
 558                                  set ? (sigset_t __user *) &s : NULL,
 559                                  oset ? (sigset_t __user *) &s : NULL,
 560                                  sigsetsize);
 561         set_fs (old_fs);
 562         if (ret) return ret;
 563         if (oset) {
 564                 switch (_NSIG_WORDS) {
 565                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 566                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 567                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 568                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 569                 }
 570                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 571                         return -EFAULT;
 572         }
 573         return 0;
 574 }
 575
 576 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 577                                     compat_size_t sigsetsize)
 578 {
 579         sigset_t s;
 580         compat_sigset_t s32;
 581         int ret;
 582         mm_segment_t old_fs = get_fs();
 583
 584         set_fs (KERNEL_DS);
 585         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 586         set_fs (old_fs);
 587         if (!ret) {
 588                 switch (_NSIG_WORDS) {
 589                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 590                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 591                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 592                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 593                 }
 594                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 595                         return -EFAULT;
 596         }
 597         return ret;
 598 }
 599
 600 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 601                                            struct compat_siginfo __user *uinfo)
 602 {
 603         siginfo_t info;
 604         int ret;
 605         mm_segment_t old_fs = get_fs();
 606
 607         if (copy_siginfo_from_user32(&info, uinfo))
 608                 return -EFAULT;
 609
 610         set_fs (KERNEL_DS);
 611         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 612         set_fs (old_fs);
 613         return ret;
 614 }
 615
 616 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 617                                      struct old_sigaction32 __user *oact)
 618 {
 619         struct k_sigaction new_ka, old_ka;
 620         int ret;
 621
 622         if (sig < 0) {
 623                 set_thread_flag(TIF_NEWSIGNALS);
 624                 sig = -sig;
 625         }
 626
 627         if (act) {
 628                 compat_old_sigset_t mask;
 629                 u32 u_handler, u_restorer;
 630
 631                 ret = get_user(u_handler, &act->sa_handler);
 632                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 633                 ret |= __get_user(u_restorer, &act->sa_restorer);
 634                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 635                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 636                 ret |= __get_user(mask, &act->sa_mask);
 637                 if (ret)
 638                         return ret;
 639                 new_ka.ka_restorer = NULL;
 640                 siginitset(&new_ka.sa.sa_mask, mask);
 641         }
 642
 643         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 644
 645         if (!ret && oact) {
 646                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 647                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 648                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 649                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 650         }
 651
 652         return ret;
 653 }
 654
 655 asmlinkage long compat_sys_rt_sigaction(int sig,
 656                                         struct sigaction32 __user *act,
 657                                         struct sigaction32 __user *oact,
 658                                         void __user *restorer,
 659                                         compat_size_t sigsetsize)
 660 {
 661         struct k_sigaction new_ka, old_ka;
 662         int ret;
 663         compat_sigset_t set32;
 664
 665         /* XXX: Don't preclude handling different sized sigset_t's.  */
 666         if (sigsetsize != sizeof(compat_sigset_t))
 667                 return -EINVAL;
 668
 669         /* All tasks which use RT signals (effectively) use
 670          * new style signals.
 671          */
 672         set_thread_flag(TIF_NEWSIGNALS);
 673
 674         if (act) {
 675                 u32 u_handler, u_restorer;
 676
 677                 new_ka.ka_restorer = restorer;
 678                 ret = get_user(u_handler, &act->sa_handler);
 679                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 680                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 681                 switch (_NSIG_WORDS) {
 682                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 683                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 684                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 685                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 686                 }
 687                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 688                 ret |= __get_user(u_restorer, &act->sa_restorer);
 689                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 690                 if (ret)
 691                         return -EFAULT;
 692         }
 693
 694         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 695
 696         if (!ret && oact) {
 697                 switch (_NSIG_WORDS) {
 698                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 699                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 700                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 701                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 702                 }
 703                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 704                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 705                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 706                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 707                 if (ret)
 708                         ret = -EFAULT;
 709         }
 710
 711         return ret;
 712 }
 713
 714 /*
 715  * sparc32_execve() executes a new program after the asm stub has set
 716  * things up for us.  This should basically do what I want it to.
 717  */
 718 asmlinkage long sparc32_execve(struct pt_regs *regs)
 719 {
 720         int error, base = 0;
 721         char *filename;
 722
 723         /* User register window flush is done by entry.S */
 724
 725         /* Check for indirect call. */
 726         if ((u32)regs->u_regs[UREG_G1] == 0)
 727                 base = 1;
 728
 729         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 730         error = PTR_ERR(filename);
 731         if (IS_ERR(filename))
 732                 goto out;
 733
 734         error = compat_do_execve(filename,
 735                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 736                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 737
 738         putname(filename);
 739
 740         if (!error) {
 741                 fprs_write(0);
 742                 current_thread_info()->xfsr[0] = 0;
 743                 current_thread_info()->fpsaved[0] = 0;
 744                 regs->tstate &= ~TSTATE_PEF;
 745                 task_lock(current);
 746                 current->ptrace &= ~PT_DTRACE;
 747                 task_unlock(current);
 748         }
 749 out:
 750         return error;
 751 }
 752
 753 #ifdef CONFIG_MODULES
 754
 755 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 756                                   const char __user *uargs)
 757 {
 758         return sys_init_module(umod, len, uargs);
 759 }
 760
 761 asmlinkage long sys32_delete_module(const char __user *name_user,
 762                                     unsigned int flags)
 763 {
 764         return sys_delete_module(name_user, flags);
 765 }
 766
 767 #else /* CONFIG_MODULES */
 768
 769 asmlinkage long sys32_init_module(const char __user *name_user,
 770                                   struct module __user *mod_user)
 771 {
 772         return -ENOSYS;
 773 }
 774
 775 asmlinkage long sys32_delete_module(const char __user *name_user)
 776 {
 777         return -ENOSYS;
 778 }
 779
 780 #endif  /* CONFIG_MODULES */
 781
 782 /* Translations due to time_t size differences.  Which affects all
 783    sorts of things, like timeval and itimerval.  */
 784
 785 extern struct timezone sys_tz;
 786
 787 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 788                                    struct timezone __user *tz)
 789 {
 790         if (tv) {
 791                 struct timeval ktv;
 792                 do_gettimeofday(&ktv);
 793                 if (put_tv32(tv, &ktv))
 794                         return -EFAULT;
 795         }
 796         if (tz) {
 797                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 798                         return -EFAULT;
 799         }
 800         return 0;
 801 }
 802
 803 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 804 {
 805         long usec;
 806
 807         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 808                 return -EFAULT;
 809         if (__get_user(o->tv_sec, &i->tv_sec))
 810                 return -EFAULT;
 811         if (__get_user(usec, &i->tv_usec))
 812                 return -EFAULT;
 813         o->tv_nsec = usec * 1000;
 814         return 0;
 815 }
 816
 817 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 818                                    struct timezone __user *tz)
 819 {
 820         struct timespec kts;
 821         struct timezone ktz;
 822
 823         if (tv) {
 824                 if (get_ts32(&kts, tv))
 825                         return -EFAULT;
 826         }
 827         if (tz) {
 828                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 829                         return -EFAULT;
 830         }
 831
 832         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 833 }
 834
 835 asmlinkage long sys32_utimes(char __user *filename,
 836                              struct compat_timeval __user *tvs)
 837 {
 838         struct timeval ktvs[2];
 839
 840         if (tvs) {
 841                 if (get_tv32(&ktvs[0], tvs) ||
 842                     get_tv32(&ktvs[1], 1+tvs))
 843                         return -EFAULT;
 844         }
 845
 846         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 847 }
 848
 849 /* These are here just in case some old sparc32 binary calls it. */
 850 asmlinkage long sys32_pause(void)
 851 {
 852         current->state = TASK_INTERRUPTIBLE;
 853         schedule();
 854         return -ERESTARTNOHAND;
 855 }
 856
 857 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 858                                         char __user *ubuf,
 859                                         compat_size_t count,
 860                                         unsigned long poshi,
 861                                         unsigned long poslo)
 862 {
 863         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 864 }
 865
 866 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 867                                          char __user *ubuf,
 868                                          compat_size_t count,
 869                                          unsigned long poshi,
 870                                          unsigned long poslo)
 871 {
 872         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 873 }
 874
 875 asmlinkage long compat_sys_readahead(int fd,
 876                                      unsigned long offhi,
 877                                      unsigned long offlo,
 878                                      compat_size_t count)
 879 {
 880         return sys_readahead(fd, (offhi << 32) | offlo, count);
 881 }
 882
 883 long compat_sys_fadvise64(int fd,
 884                           unsigned long offhi,
 885                           unsigned long offlo,
 886                           compat_size_t len, int advice)
 887 {
 888         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 889 }
 890
 891 long compat_sys_fadvise64_64(int fd,
 892                              unsigned long offhi, unsigned long offlo,
 893                              unsigned long lenhi, unsigned long lenlo,
 894                              int advice)
 895 {
 896         return sys_fadvise64_64(fd,
 897                                 (offhi << 32) | offlo,
 898                                 (lenhi << 32) | lenlo,
 899                                 advice);
 900 }
 901
 902 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 903                                     compat_off_t __user *offset,
 904                                     compat_size_t count)
 905 {
 906         mm_segment_t old_fs = get_fs();
 907         int ret;
 908         off_t of;
 909
 910         if (offset && get_user(of, offset))
 911                 return -EFAULT;
 912
 913         set_fs(KERNEL_DS);
 914         ret = sys_sendfile(out_fd, in_fd,
 915                            offset ? (off_t __user *) &of : NULL,
 916                            count);
 917         set_fs(old_fs);
 918
 919         if (offset && put_user(of, offset))
 920                 return -EFAULT;
 921
 922         return ret;
 923 }
 924
 925 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 926                                       compat_loff_t __user *offset,
 927                                       compat_size_t count)
 928 {
 929         mm_segment_t old_fs = get_fs();
 930         int ret;
 931         loff_t lof;
 932
 933         if (offset && get_user(lof, offset))
 934                 return -EFAULT;
 935
 936         set_fs(KERNEL_DS);
 937         ret = sys_sendfile64(out_fd, in_fd,
 938                              offset ? (loff_t __user *) &lof : NULL,
 939                              count);
 940         set_fs(old_fs);
 941
 942         if (offset && put_user(lof, offset))
 943                 return -EFAULT;
 944
 945         return ret;
 946 }
 947
 948 /* Handle adjtimex compatibility. */
 949
 950 extern int do_adjtimex(struct timex *);
 951
 952 asmlinkage long sys32_adjtimex(struct compat_timex __user *utp)
 953 {
 954         struct timex txc;
 955         int ret;
 956
 957         memset(&txc, 0, sizeof(struct timex));
 958
 959         if (get_user(txc.modes, &utp->modes) ||
 960             __get_user(txc.offset, &utp->offset) ||
 961             __get_user(txc.freq, &utp->freq) ||
 962             __get_user(txc.maxerror, &utp->maxerror) ||
 963             __get_user(txc.esterror, &utp->esterror) ||
 964             __get_user(txc.status, &utp->status) ||
 965             __get_user(txc.constant, &utp->constant) ||
 966             __get_user(txc.precision, &utp->precision) ||
 967             __get_user(txc.tolerance, &utp->tolerance) ||
 968             __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 969             __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 970             __get_user(txc.tick, &utp->tick) ||
 971             __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 972             __get_user(txc.jitter, &utp->jitter) ||
 973             __get_user(txc.shift, &utp->shift) ||
 974             __get_user(txc.stabil, &utp->stabil) ||
 975             __get_user(txc.jitcnt, &utp->jitcnt) ||
 976             __get_user(txc.calcnt, &utp->calcnt) ||
 977             __get_user(txc.errcnt, &utp->errcnt) ||
 978             __get_user(txc.stbcnt, &utp->stbcnt))
 979                 return -EFAULT;
 980
 981         ret = do_adjtimex(&txc);
 982
 983         if (put_user(txc.modes, &utp->modes) ||
 984             __put_user(txc.offset, &utp->offset) ||
 985             __put_user(txc.freq, &utp->freq) ||
 986             __put_user(txc.maxerror, &utp->maxerror) ||
 987             __put_user(txc.esterror, &utp->esterror) ||
 988             __put_user(txc.status, &utp->status) ||
 989             __put_user(txc.constant, &utp->constant) ||
 990             __put_user(txc.precision, &utp->precision) ||
 991             __put_user(txc.tolerance, &utp->tolerance) ||
 992             __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 993             __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 994             __put_user(txc.tick, &utp->tick) ||
 995             __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 996             __put_user(txc.jitter, &utp->jitter) ||
 997             __put_user(txc.shift, &utp->shift) ||
 998             __put_user(txc.stabil, &utp->stabil) ||
 999             __put_user(txc.jitcnt, &utp->jitcnt) ||
1000             __put_user(txc.calcnt, &utp->calcnt) ||
1001             __put_user(txc.errcnt, &utp->errcnt) ||
1002             __put_user(txc.stbcnt, &utp->stbcnt))
1003                 ret = -EFAULT;
1004
1005         return ret;
1006 }
1007
1008 /* This is just a version for 32-bit applications which does
1009  * not force O_LARGEFILE on.
1010  */
1011
1012 asmlinkage long sparc32_open(const char __user *filename,
1013                              int flags, int mode)
1014 {
1015         return do_sys_open(AT_FDCWD, filename, flags, mode);
1016 }
1017
1018 extern unsigned long do_mremap(unsigned long addr,
1019         unsigned long old_len, unsigned long new_len,
1020         unsigned long flags, unsigned long new_addr);
1021
1022 asmlinkage unsigned long sys32_mremap(unsigned long addr,
1023         unsigned long old_len, unsigned long new_len,
1024         unsigned long flags, u32 __new_addr)
1025 {
1026         struct vm_area_struct *vma;
1027         unsigned long ret = -EINVAL;
1028         unsigned long new_addr = __new_addr;
1029
1030         if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
1031                 goto out;
1032         if (addr > STACK_TOP32 - old_len)
1033                 goto out;
1034         down_write(&current->mm->mmap_sem);
1035         if (flags & MREMAP_FIXED) {
1036                 if (new_addr > STACK_TOP32 - new_len)
1037                         goto out_sem;
1038         } else if (addr > STACK_TOP32 - new_len) {
1039                 unsigned long map_flags = 0;
1040                 struct file *file = NULL;
1041
1042                 ret = -ENOMEM;
1043                 if (!(flags & MREMAP_MAYMOVE))
1044                         goto out_sem;
1045
1046                 vma = find_vma(current->mm, addr);
1047                 if (vma) {
1048                         if (vma->vm_flags & VM_SHARED)
1049                                 map_flags |= MAP_SHARED;
1050                         file = vma->vm_file;
1051                 }
1052
1053                 /* MREMAP_FIXED checked above. */
1054                 new_addr = get_unmapped_area(file, addr, new_len,
1055                                     vma ? vma->vm_pgoff : 0,
1056                                     map_flags);
1057                 ret = new_addr;
1058                 if (new_addr & ~PAGE_MASK)
1059                         goto out_sem;
1060                 flags |= MREMAP_FIXED;
1061         }
1062         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1063 out_sem:
1064         up_write(&current->mm->mmap_sem);
1065 out:
1066         return ret;
1067 }
1068
1069 struct __sysctl_args32 {
1070         u32 name;
1071         int nlen;
1072         u32 oldval;
1073         u32 oldlenp;
1074         u32 newval;
1075         u32 newlen;
1076         u32 __unused[4];
1077 };
1078
1079 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1080 {
1081 #ifndef CONFIG_SYSCTL
1082         return -ENOSYS;
1083 #else
1084         struct __sysctl_args32 tmp;
1085         int error;
1086         size_t oldlen, __user *oldlenp = NULL;
1087         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1088
1089         if (copy_from_user(&tmp, args, sizeof(tmp)))
1090                 return -EFAULT;
1091
1092         if (tmp.oldval && tmp.oldlenp) {
1093                 /* Duh, this is ugly and might not work if sysctl_args
1094                    is in read-only memory, but do_sysctl does indirectly
1095                    a lot of uaccess in both directions and we'd have to
1096                    basically copy the whole sysctl.c here, and
1097                    glibc's __sysctl uses rw memory for the structure
1098                    anyway.  */
1099                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1100                     put_user(oldlen, (size_t __user *)addr))
1101                         return -EFAULT;
1102                 oldlenp = (size_t __user *)addr;
1103         }
1104
1105         lock_kernel();
1106         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1107                           tmp.nlen,
1108                           (void __user *)(unsigned long) tmp.oldval,
1109                           oldlenp,
1110                           (void __user *)(unsigned long) tmp.newval,
1111                           tmp.newlen);
1112         unlock_kernel();
1113         if (oldlenp) {
1114                 if (!error) {
1115                         if (get_user(oldlen, (size_t __user *)addr) ||
1116                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1117                                 error = -EFAULT;
1118                 }
1119                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1120                         error = -EFAULT;
1121         }
1122         return error;
1123 #endif
1124 }
1125
1126 long sys32_lookup_dcookie(unsigned long cookie_high,
1127                           unsigned long cookie_low,
1128                           char __user *buf, size_t len)
1129 {
1130         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1131                                   buf, len);
1132 }