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/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 #include <asm/a.out.h>
  65
  66 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
  67 {
  68         return sys_chown(filename, low2highuid(user), low2highgid(group));
  69 }
  70
  71 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
  72 {
  73         return sys_lchown(filename, low2highuid(user), low2highgid(group));
  74 }
  75
  76 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
  77 {
  78         return sys_fchown(fd, low2highuid(user), low2highgid(group));
  79 }
  80
  81 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
  82 {
  83         return sys_setregid(low2highgid(rgid), low2highgid(egid));
  84 }
  85
  86 asmlinkage long sys32_setgid16(u16 gid)
  87 {
  88         return sys_setgid((gid_t)gid);
  89 }
  90
  91 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
  92 {
  93         return sys_setreuid(low2highuid(ruid), low2highuid(euid));
  94 }
  95
  96 asmlinkage long sys32_setuid16(u16 uid)
  97 {
  98         return sys_setuid((uid_t)uid);
  99 }
 100
 101 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
 102 {
 103         return sys_setresuid(low2highuid(ruid), low2highuid(euid),
 104                 low2highuid(suid));
 105 }
 106
 107 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
 108 {
 109         int retval;
 110
 111         if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
 112             !(retval = put_user(high2lowuid(current->euid), euid)))
 113                 retval = put_user(high2lowuid(current->suid), suid);
 114
 115         return retval;
 116 }
 117
 118 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
 119 {
 120         return sys_setresgid(low2highgid(rgid), low2highgid(egid),
 121                 low2highgid(sgid));
 122 }
 123
 124 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
 125 {
 126         int retval;
 127
 128         if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
 129             !(retval = put_user(high2lowgid(current->egid), egid)))
 130                 retval = put_user(high2lowgid(current->sgid), sgid);
 131
 132         return retval;
 133 }
 134
 135 asmlinkage long sys32_setfsuid16(u16 uid)
 136 {
 137         return sys_setfsuid((uid_t)uid);
 138 }
 139
 140 asmlinkage long sys32_setfsgid16(u16 gid)
 141 {
 142         return sys_setfsgid((gid_t)gid);
 143 }
 144
 145 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
 146 {
 147         int i;
 148         u16 group;
 149
 150         for (i = 0; i < group_info->ngroups; i++) {
 151                 group = (u16)GROUP_AT(group_info, i);
 152                 if (put_user(group, grouplist+i))
 153                         return -EFAULT;
 154         }
 155
 156         return 0;
 157 }
 158
 159 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
 160 {
 161         int i;
 162         u16 group;
 163
 164         for (i = 0; i < group_info->ngroups; i++) {
 165                 if (get_user(group, grouplist+i))
 166                         return  -EFAULT;
 167                 GROUP_AT(group_info, i) = (gid_t)group;
 168         }
 169
 170         return 0;
 171 }
 172
 173 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
 174 {
 175         int i;
 176
 177         if (gidsetsize < 0)
 178                 return -EINVAL;
 179
 180         get_group_info(current->group_info);
 181         i = current->group_info->ngroups;
 182         if (gidsetsize) {
 183                 if (i > gidsetsize) {
 184                         i = -EINVAL;
 185                         goto out;
 186                 }
 187                 if (groups16_to_user(grouplist, current->group_info)) {
 188                         i = -EFAULT;
 189                         goto out;
 190                 }
 191         }
 192 out:
 193         put_group_info(current->group_info);
 194         return i;
 195 }
 196
 197 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 198 {
 199         struct group_info *group_info;
 200         int retval;
 201
 202         if (!capable(CAP_SETGID))
 203                 return -EPERM;
 204         if ((unsigned)gidsetsize > NGROUPS_MAX)
 205                 return -EINVAL;
 206
 207         group_info = groups_alloc(gidsetsize);
 208         if (!group_info)
 209                 return -ENOMEM;
 210         retval = groups16_from_user(group_info, grouplist);
 211         if (retval) {
 212                 put_group_info(group_info);
 213                 return retval;
 214         }
 215
 216         retval = set_current_groups(group_info);
 217         put_group_info(group_info);
 218
 219         return retval;
 220 }
 221
 222 asmlinkage long sys32_getuid16(void)
 223 {
 224         return high2lowuid(current->uid);
 225 }
 226
 227 asmlinkage long sys32_geteuid16(void)
 228 {
 229         return high2lowuid(current->euid);
 230 }
 231
 232 asmlinkage long sys32_getgid16(void)
 233 {
 234         return high2lowgid(current->gid);
 235 }
 236
 237 asmlinkage long sys32_getegid16(void)
 238 {
 239         return high2lowgid(current->egid);
 240 }
 241
 242 /* 32-bit timeval and related flotsam.  */
 243
 244 static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
 245 {
 246         return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
 247                 (__get_user(o->tv_sec, &i->tv_sec) |
 248                  __get_user(o->tv_usec, &i->tv_usec)));
 249 }
 250
 251 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 252 {
 253         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 254                 (__put_user(i->tv_sec, &o->tv_sec) |
 255                  __put_user(i->tv_usec, &o->tv_usec)));
 256 }
 257
 258 #ifdef CONFIG_SYSVIPC
 259 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
 260 {
 261         int version;
 262
 263         version = call >> 16; /* hack for backward compatibility */
 264         call &= 0xffff;
 265
 266         switch (call) {
 267         case SEMTIMEDOP:
 268                 if (fifth)
 269                         /* sign extend semid */
 270                         return compat_sys_semtimedop((int)first,
 271                                                      compat_ptr(ptr), second,
 272                                                      compat_ptr(fifth));
 273                 /* else fall through for normal semop() */
 274         case SEMOP:
 275                 /* struct sembuf is the same on 32 and 64bit :)) */
 276                 /* sign extend semid */
 277                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 278                                       NULL);
 279         case SEMGET:
 280                 /* sign extend key, nsems */
 281                 return sys_semget((int)first, (int)second, third);
 282         case SEMCTL:
 283                 /* sign extend semid, semnum */
 284                 return compat_sys_semctl((int)first, (int)second, third,
 285                                          compat_ptr(ptr));
 286
 287         case MSGSND:
 288                 /* sign extend msqid */
 289                 return compat_sys_msgsnd((int)first, (int)second, third,
 290                                          compat_ptr(ptr));
 291         case MSGRCV:
 292                 /* sign extend msqid, msgtyp */
 293                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 294                                          third, version, compat_ptr(ptr));
 295         case MSGGET:
 296                 /* sign extend key */
 297                 return sys_msgget((int)first, second);
 298         case MSGCTL:
 299                 /* sign extend msqid */
 300                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 301
 302         case SHMAT:
 303                 /* sign extend shmid */
 304                 return compat_sys_shmat((int)first, second, third, version,
 305                                         compat_ptr(ptr));
 306         case SHMDT:
 307                 return sys_shmdt(compat_ptr(ptr));
 308         case SHMGET:
 309                 /* sign extend key_t */
 310                 return sys_shmget((int)first, second, third);
 311         case SHMCTL:
 312                 /* sign extend shmid */
 313                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 314
 315         default:
 316                 return -ENOSYS;
 317         };
 318
 319         return -ENOSYS;
 320 }
 321 #endif
 322
 323 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 324 {
 325         if ((int)high < 0)
 326                 return -EINVAL;
 327         else
 328                 return sys_truncate(path, (high << 32) | low);
 329 }
 330
 331 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 332 {
 333         if ((int)high < 0)
 334                 return -EINVAL;
 335         else
 336                 return sys_ftruncate(fd, (high << 32) | low);
 337 }
 338
 339 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 340 {
 341         int err;
 342
 343         if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
 344             !old_valid_dev(stat->rdev))
 345                 return -EOVERFLOW;
 346
 347         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 348         err |= put_user(stat->ino, &statbuf->st_ino);
 349         err |= put_user(stat->mode, &statbuf->st_mode);
 350         err |= put_user(stat->nlink, &statbuf->st_nlink);
 351         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 352         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 353         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 354         err |= put_user(stat->size, &statbuf->st_size);
 355         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 356         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 357         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 358         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 359         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 360         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 361         err |= put_user(stat->blksize, &statbuf->st_blksize);
 362         err |= put_user(stat->blocks, &statbuf->st_blocks);
 363         err |= put_user(0, &statbuf->__unused4[0]);
 364         err |= put_user(0, &statbuf->__unused4[1]);
 365
 366         return err;
 367 }
 368
 369 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
 370 {
 371         int err;
 372
 373         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 374         err |= put_user(stat->ino, &statbuf->st_ino);
 375         err |= put_user(stat->mode, &statbuf->st_mode);
 376         err |= put_user(stat->nlink, &statbuf->st_nlink);
 377         err |= put_user(stat->uid, &statbuf->st_uid);
 378         err |= put_user(stat->gid, &statbuf->st_gid);
 379         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 380         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 381         err |= put_user(stat->size, &statbuf->st_size);
 382         err |= put_user(stat->blksize, &statbuf->st_blksize);
 383         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 384         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 385         err |= put_user(stat->blocks, &statbuf->st_blocks);
 386         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 387         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 388         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 389         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 390         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 391         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 392         err |= put_user(0, &statbuf->__unused4);
 393         err |= put_user(0, &statbuf->__unused5);
 394
 395         return err;
 396 }
 397
 398 asmlinkage long compat_sys_stat64(char __user * filename,
 399                 struct compat_stat64 __user *statbuf)
 400 {
 401         struct kstat stat;
 402         int error = vfs_stat(filename, &stat);
 403
 404         if (!error)
 405                 error = cp_compat_stat64(&stat, statbuf);
 406         return error;
 407 }
 408
 409 asmlinkage long compat_sys_lstat64(char __user * filename,
 410                 struct compat_stat64 __user *statbuf)
 411 {
 412         struct kstat stat;
 413         int error = vfs_lstat(filename, &stat);
 414
 415         if (!error)
 416                 error = cp_compat_stat64(&stat, statbuf);
 417         return error;
 418 }
 419
 420 asmlinkage long compat_sys_fstat64(unsigned int fd,
 421                 struct compat_stat64 __user * statbuf)
 422 {
 423         struct kstat stat;
 424         int error = vfs_fstat(fd, &stat);
 425
 426         if (!error)
 427                 error = cp_compat_stat64(&stat, statbuf);
 428         return error;
 429 }
 430
 431 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
 432                 struct compat_stat64 __user * statbuf, int flag)
 433 {
 434         struct kstat stat;
 435         int error = -EINVAL;
 436
 437         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 438                 goto out;
 439
 440         if (flag & AT_SYMLINK_NOFOLLOW)
 441                 error = vfs_lstat_fd(dfd, filename, &stat);
 442         else
 443                 error = vfs_stat_fd(dfd, filename, &stat);
 444
 445         if (!error)
 446                 error = cp_compat_stat64(&stat, statbuf);
 447
 448 out:
 449         return error;
 450 }
 451
 452 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 453 {
 454         return sys_sysfs(option, arg1, arg2);
 455 }
 456
 457 struct sysinfo32 {
 458         s32 uptime;
 459         u32 loads[3];
 460         u32 totalram;
 461         u32 freeram;
 462         u32 sharedram;
 463         u32 bufferram;
 464         u32 totalswap;
 465         u32 freeswap;
 466         unsigned short procs;
 467         unsigned short pad;
 468         u32 totalhigh;
 469         u32 freehigh;
 470         u32 mem_unit;
 471         char _f[20-2*sizeof(int)-sizeof(int)];
 472 };
 473
 474 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 475 {
 476         struct sysinfo s;
 477         int ret, err;
 478         int bitcount = 0;
 479         mm_segment_t old_fs = get_fs ();
 480
 481         set_fs(KERNEL_DS);
 482         ret = sys_sysinfo((struct sysinfo __user *) &s);
 483         set_fs(old_fs);
 484         /* Check to see if any memory value is too large for 32-bit and
 485          * scale down if needed.
 486          */
 487         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 488                 while (s.mem_unit < PAGE_SIZE) {
 489                         s.mem_unit <<= 1;
 490                         bitcount++;
 491                 }
 492                 s.totalram >>= bitcount;
 493                 s.freeram >>= bitcount;
 494                 s.sharedram >>= bitcount;
 495                 s.bufferram >>= bitcount;
 496                 s.totalswap >>= bitcount;
 497                 s.freeswap >>= bitcount;
 498                 s.totalhigh >>= bitcount;
 499                 s.freehigh >>= bitcount;
 500         }
 501
 502         err = put_user (s.uptime, &info->uptime);
 503         err |= __put_user (s.loads[0], &info->loads[0]);
 504         err |= __put_user (s.loads[1], &info->loads[1]);
 505         err |= __put_user (s.loads[2], &info->loads[2]);
 506         err |= __put_user (s.totalram, &info->totalram);
 507         err |= __put_user (s.freeram, &info->freeram);
 508         err |= __put_user (s.sharedram, &info->sharedram);
 509         err |= __put_user (s.bufferram, &info->bufferram);
 510         err |= __put_user (s.totalswap, &info->totalswap);
 511         err |= __put_user (s.freeswap, &info->freeswap);
 512         err |= __put_user (s.procs, &info->procs);
 513         err |= __put_user (s.totalhigh, &info->totalhigh);
 514         err |= __put_user (s.freehigh, &info->freehigh);
 515         err |= __put_user (s.mem_unit, &info->mem_unit);
 516         if (err)
 517                 return -EFAULT;
 518         return ret;
 519 }
 520
 521 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 522 {
 523         struct timespec t;
 524         int ret;
 525         mm_segment_t old_fs = get_fs ();
 526
 527         set_fs (KERNEL_DS);
 528         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 529         set_fs (old_fs);
 530         if (put_compat_timespec(&t, interval))
 531                 return -EFAULT;
 532         return ret;
 533 }
 534
 535 asmlinkage long compat_sys_rt_sigprocmask(int how,
 536                                           compat_sigset_t __user *set,
 537                                           compat_sigset_t __user *oset,
 538                                           compat_size_t sigsetsize)
 539 {
 540         sigset_t s;
 541         compat_sigset_t s32;
 542         int ret;
 543         mm_segment_t old_fs = get_fs();
 544
 545         if (set) {
 546                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 547                         return -EFAULT;
 548                 switch (_NSIG_WORDS) {
 549                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 550                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 551                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 552                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 553                 }
 554         }
 555         set_fs (KERNEL_DS);
 556         ret = sys_rt_sigprocmask(how,
 557                                  set ? (sigset_t __user *) &s : NULL,
 558                                  oset ? (sigset_t __user *) &s : NULL,
 559                                  sigsetsize);
 560         set_fs (old_fs);
 561         if (ret) return ret;
 562         if (oset) {
 563                 switch (_NSIG_WORDS) {
 564                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 565                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 566                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 567                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 568                 }
 569                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 570                         return -EFAULT;
 571         }
 572         return 0;
 573 }
 574
 575 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 576                                     compat_size_t sigsetsize)
 577 {
 578         sigset_t s;
 579         compat_sigset_t s32;
 580         int ret;
 581         mm_segment_t old_fs = get_fs();
 582
 583         set_fs (KERNEL_DS);
 584         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 585         set_fs (old_fs);
 586         if (!ret) {
 587                 switch (_NSIG_WORDS) {
 588                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 589                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 590                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 591                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 592                 }
 593                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 594                         return -EFAULT;
 595         }
 596         return ret;
 597 }
 598
 599 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 600                                            struct compat_siginfo __user *uinfo)
 601 {
 602         siginfo_t info;
 603         int ret;
 604         mm_segment_t old_fs = get_fs();
 605
 606         if (copy_siginfo_from_user32(&info, uinfo))
 607                 return -EFAULT;
 608
 609         set_fs (KERNEL_DS);
 610         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 611         set_fs (old_fs);
 612         return ret;
 613 }
 614
 615 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 616                                      struct old_sigaction32 __user *oact)
 617 {
 618         struct k_sigaction new_ka, old_ka;
 619         int ret;
 620
 621         if (sig < 0) {
 622                 set_thread_flag(TIF_NEWSIGNALS);
 623                 sig = -sig;
 624         }
 625
 626         if (act) {
 627                 compat_old_sigset_t mask;
 628                 u32 u_handler, u_restorer;
 629
 630                 ret = get_user(u_handler, &act->sa_handler);
 631                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 632                 ret |= __get_user(u_restorer, &act->sa_restorer);
 633                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 634                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 635                 ret |= __get_user(mask, &act->sa_mask);
 636                 if (ret)
 637                         return ret;
 638                 new_ka.ka_restorer = NULL;
 639                 siginitset(&new_ka.sa.sa_mask, mask);
 640         }
 641
 642         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 643
 644         if (!ret && oact) {
 645                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 646                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 647                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 648                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 649         }
 650
 651         return ret;
 652 }
 653
 654 asmlinkage long compat_sys_rt_sigaction(int sig,
 655                                         struct sigaction32 __user *act,
 656                                         struct sigaction32 __user *oact,
 657                                         void __user *restorer,
 658                                         compat_size_t sigsetsize)
 659 {
 660         struct k_sigaction new_ka, old_ka;
 661         int ret;
 662         compat_sigset_t set32;
 663
 664         /* XXX: Don't preclude handling different sized sigset_t's.  */
 665         if (sigsetsize != sizeof(compat_sigset_t))
 666                 return -EINVAL;
 667
 668         /* All tasks which use RT signals (effectively) use
 669          * new style signals.
 670          */
 671         set_thread_flag(TIF_NEWSIGNALS);
 672
 673         if (act) {
 674                 u32 u_handler, u_restorer;
 675
 676                 new_ka.ka_restorer = restorer;
 677                 ret = get_user(u_handler, &act->sa_handler);
 678                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 679                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 680                 switch (_NSIG_WORDS) {
 681                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 682                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 683                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 684                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 685                 }
 686                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 687                 ret |= __get_user(u_restorer, &act->sa_restorer);
 688                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 689                 if (ret)
 690                         return -EFAULT;
 691         }
 692
 693         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 694
 695         if (!ret && oact) {
 696                 switch (_NSIG_WORDS) {
 697                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 698                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 699                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 700                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 701                 }
 702                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 703                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 704                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 705                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 706                 if (ret)
 707                         ret = -EFAULT;
 708         }
 709
 710         return ret;
 711 }
 712
 713 /*
 714  * sparc32_execve() executes a new program after the asm stub has set
 715  * things up for us.  This should basically do what I want it to.
 716  */
 717 asmlinkage long sparc32_execve(struct pt_regs *regs)
 718 {
 719         int error, base = 0;
 720         char *filename;
 721
 722         /* User register window flush is done by entry.S */
 723
 724         /* Check for indirect call. */
 725         if ((u32)regs->u_regs[UREG_G1] == 0)
 726                 base = 1;
 727
 728         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 729         error = PTR_ERR(filename);
 730         if (IS_ERR(filename))
 731                 goto out;
 732
 733         error = compat_do_execve(filename,
 734                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 735                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 736
 737         putname(filename);
 738
 739         if (!error) {
 740                 fprs_write(0);
 741                 current_thread_info()->xfsr[0] = 0;
 742                 current_thread_info()->fpsaved[0] = 0;
 743                 regs->tstate &= ~TSTATE_PEF;
 744                 task_lock(current);
 745                 current->ptrace &= ~PT_DTRACE;
 746                 task_unlock(current);
 747         }
 748 out:
 749         return error;
 750 }
 751
 752 #ifdef CONFIG_MODULES
 753
 754 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 755                                   const char __user *uargs)
 756 {
 757         return sys_init_module(umod, len, uargs);
 758 }
 759
 760 asmlinkage long sys32_delete_module(const char __user *name_user,
 761                                     unsigned int flags)
 762 {
 763         return sys_delete_module(name_user, flags);
 764 }
 765
 766 #else /* CONFIG_MODULES */
 767
 768 asmlinkage long sys32_init_module(const char __user *name_user,
 769                                   struct module __user *mod_user)
 770 {
 771         return -ENOSYS;
 772 }
 773
 774 asmlinkage long sys32_delete_module(const char __user *name_user)
 775 {
 776         return -ENOSYS;
 777 }
 778
 779 #endif  /* CONFIG_MODULES */
 780
 781 /* Translations due to time_t size differences.  Which affects all
 782    sorts of things, like timeval and itimerval.  */
 783
 784 extern struct timezone sys_tz;
 785
 786 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 787                                    struct timezone __user *tz)
 788 {
 789         if (tv) {
 790                 struct timeval ktv;
 791                 do_gettimeofday(&ktv);
 792                 if (put_tv32(tv, &ktv))
 793                         return -EFAULT;
 794         }
 795         if (tz) {
 796                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 797                         return -EFAULT;
 798         }
 799         return 0;
 800 }
 801
 802 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 803 {
 804         long usec;
 805
 806         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 807                 return -EFAULT;
 808         if (__get_user(o->tv_sec, &i->tv_sec))
 809                 return -EFAULT;
 810         if (__get_user(usec, &i->tv_usec))
 811                 return -EFAULT;
 812         o->tv_nsec = usec * 1000;
 813         return 0;
 814 }
 815
 816 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 817                                    struct timezone __user *tz)
 818 {
 819         struct timespec kts;
 820         struct timezone ktz;
 821
 822         if (tv) {
 823                 if (get_ts32(&kts, tv))
 824                         return -EFAULT;
 825         }
 826         if (tz) {
 827                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 828                         return -EFAULT;
 829         }
 830
 831         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 832 }
 833
 834 asmlinkage long sys32_utimes(char __user *filename,
 835                              struct compat_timeval __user *tvs)
 836 {
 837         struct timeval ktvs[2];
 838
 839         if (tvs) {
 840                 if (get_tv32(&ktvs[0], tvs) ||
 841                     get_tv32(&ktvs[1], 1+tvs))
 842                         return -EFAULT;
 843         }
 844
 845         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 846 }
 847
 848 /* These are here just in case some old sparc32 binary calls it. */
 849 asmlinkage long sys32_pause(void)
 850 {
 851         current->state = TASK_INTERRUPTIBLE;
 852         schedule();
 853         return -ERESTARTNOHAND;
 854 }
 855
 856 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 857                                         char __user *ubuf,
 858                                         compat_size_t count,
 859                                         unsigned long poshi,
 860                                         unsigned long poslo)
 861 {
 862         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 863 }
 864
 865 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 866                                          char __user *ubuf,
 867                                          compat_size_t count,
 868                                          unsigned long poshi,
 869                                          unsigned long poslo)
 870 {
 871         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 872 }
 873
 874 asmlinkage long compat_sys_readahead(int fd,
 875                                      unsigned long offhi,
 876                                      unsigned long offlo,
 877                                      compat_size_t count)
 878 {
 879         return sys_readahead(fd, (offhi << 32) | offlo, count);
 880 }
 881
 882 long compat_sys_fadvise64(int fd,
 883                           unsigned long offhi,
 884                           unsigned long offlo,
 885                           compat_size_t len, int advice)
 886 {
 887         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 888 }
 889
 890 long compat_sys_fadvise64_64(int fd,
 891                              unsigned long offhi, unsigned long offlo,
 892                              unsigned long lenhi, unsigned long lenlo,
 893                              int advice)
 894 {
 895         return sys_fadvise64_64(fd,
 896                                 (offhi << 32) | offlo,
 897                                 (lenhi << 32) | lenlo,
 898                                 advice);
 899 }
 900
 901 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 902                                     compat_off_t __user *offset,
 903                                     compat_size_t count)
 904 {
 905         mm_segment_t old_fs = get_fs();
 906         int ret;
 907         off_t of;
 908
 909         if (offset && get_user(of, offset))
 910                 return -EFAULT;
 911
 912         set_fs(KERNEL_DS);
 913         ret = sys_sendfile(out_fd, in_fd,
 914                            offset ? (off_t __user *) &of : NULL,
 915                            count);
 916         set_fs(old_fs);
 917
 918         if (offset && put_user(of, offset))
 919                 return -EFAULT;
 920
 921         return ret;
 922 }
 923
 924 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 925                                       compat_loff_t __user *offset,
 926                                       compat_size_t count)
 927 {
 928         mm_segment_t old_fs = get_fs();
 929         int ret;
 930         loff_t lof;
 931
 932         if (offset && get_user(lof, offset))
 933                 return -EFAULT;
 934
 935         set_fs(KERNEL_DS);
 936         ret = sys_sendfile64(out_fd, in_fd,
 937                              offset ? (loff_t __user *) &lof : NULL,
 938                              count);
 939         set_fs(old_fs);
 940
 941         if (offset && put_user(lof, offset))
 942                 return -EFAULT;
 943
 944         return ret;
 945 }
 946
 947 /* This is just a version for 32-bit applications which does
 948  * not force O_LARGEFILE on.
 949  */
 950
 951 asmlinkage long sparc32_open(const char __user *filename,
 952                              int flags, int mode)
 953 {
 954         return do_sys_open(AT_FDCWD, filename, flags, mode);
 955 }
 956
 957 extern unsigned long do_mremap(unsigned long addr,
 958         unsigned long old_len, unsigned long new_len,
 959         unsigned long flags, unsigned long new_addr);
 960
 961 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 962         unsigned long old_len, unsigned long new_len,
 963         unsigned long flags, u32 __new_addr)
 964 {
 965         struct vm_area_struct *vma;
 966         unsigned long ret = -EINVAL;
 967         unsigned long new_addr = __new_addr;
 968
 969         if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
 970                 goto out;
 971         if (addr > STACK_TOP32 - old_len)
 972                 goto out;
 973         down_write(&current->mm->mmap_sem);
 974         if (flags & MREMAP_FIXED) {
 975                 if (new_addr > STACK_TOP32 - new_len)
 976                         goto out_sem;
 977         } else if (addr > STACK_TOP32 - new_len) {
 978                 unsigned long map_flags = 0;
 979                 struct file *file = NULL;
 980
 981                 ret = -ENOMEM;
 982                 if (!(flags & MREMAP_MAYMOVE))
 983                         goto out_sem;
 984
 985                 vma = find_vma(current->mm, addr);
 986                 if (vma) {
 987                         if (vma->vm_flags & VM_SHARED)
 988                                 map_flags |= MAP_SHARED;
 989                         file = vma->vm_file;
 990                 }
 991
 992                 /* MREMAP_FIXED checked above. */
 993                 new_addr = get_unmapped_area(file, addr, new_len,
 994                                     vma ? vma->vm_pgoff : 0,
 995                                     map_flags);
 996                 ret = new_addr;
 997                 if (new_addr & ~PAGE_MASK)
 998                         goto out_sem;
 999                 flags |= MREMAP_FIXED;
1000         }
1001         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1002 out_sem:
1003         up_write(&current->mm->mmap_sem);
1004 out:
1005         return ret;
1006 }
1007
1008 struct __sysctl_args32 {
1009         u32 name;
1010         int nlen;
1011         u32 oldval;
1012         u32 oldlenp;
1013         u32 newval;
1014         u32 newlen;
1015         u32 __unused[4];
1016 };
1017
1018 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1019 {
1020 #ifndef CONFIG_SYSCTL
1021         return -ENOSYS;
1022 #else
1023         struct __sysctl_args32 tmp;
1024         int error;
1025         size_t oldlen, __user *oldlenp = NULL;
1026         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1027
1028         if (copy_from_user(&tmp, args, sizeof(tmp)))
1029                 return -EFAULT;
1030
1031         if (tmp.oldval && tmp.oldlenp) {
1032                 /* Duh, this is ugly and might not work if sysctl_args
1033                    is in read-only memory, but do_sysctl does indirectly
1034                    a lot of uaccess in both directions and we'd have to
1035                    basically copy the whole sysctl.c here, and
1036                    glibc's __sysctl uses rw memory for the structure
1037                    anyway.  */
1038                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1039                     put_user(oldlen, (size_t __user *)addr))
1040                         return -EFAULT;
1041                 oldlenp = (size_t __user *)addr;
1042         }
1043
1044         lock_kernel();
1045         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1046                           tmp.nlen,
1047                           (void __user *)(unsigned long) tmp.oldval,
1048                           oldlenp,
1049                           (void __user *)(unsigned long) tmp.newval,
1050                           tmp.newlen);
1051         unlock_kernel();
1052         if (oldlenp) {
1053                 if (!error) {
1054                         if (get_user(oldlen, (size_t __user *)addr) ||
1055                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1056                                 error = -EFAULT;
1057                 }
1058                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1059                         error = -EFAULT;
1060         }
1061         return error;
1062 #endif
1063 }
1064
1065 long sys32_lookup_dcookie(unsigned long cookie_high,
1066                           unsigned long cookie_low,
1067                           char __user *buf, size_t len)
1068 {
1069         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1070                                   buf, len);
1071 }
1072
1073 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)
1074 {
1075         return sys_sync_file_range(fd,
1076                                    (off_high << 32) | off_low,
1077                                    (nb_high << 32) | nb_low,
1078                                    flags);
1079 }