arch/sparc64/kernel/sys_sparc32.c

   1 /* $Id: sys_sparc32.c,v 1.184 2002/02/09 19:49:31 davem Exp $
   2  * sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   6  *
   7  * These routines maintain argument size conversion between 32bit and 64bit
   8  * environment.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/sched.h>
  13 #include <linux/capability.h>
  14 #include <linux/fs.h>
  15 #include <linux/mm.h>
  16 #include <linux/file.h>
  17 #include <linux/signal.h>
  18 #include <linux/resource.h>
  19 #include <linux/times.h>
  20 #include <linux/utsname.h>
  21 #include <linux/smp.h>
  22 #include <linux/smp_lock.h>
  23 #include <linux/sem.h>
  24 #include <linux/msg.h>
  25 #include <linux/shm.h>
  26 #include <linux/slab.h>
  27 #include <linux/uio.h>
  28 #include <linux/nfs_fs.h>
  29 #include <linux/quota.h>
  30 #include <linux/module.h>
  31 #include <linux/sunrpc/svc.h>
  32 #include <linux/nfsd/nfsd.h>
  33 #include <linux/nfsd/cache.h>
  34 #include <linux/nfsd/xdr.h>
  35 #include <linux/nfsd/syscall.h>
  36 #include <linux/poll.h>
  37 #include <linux/personality.h>
  38 #include <linux/stat.h>
  39 #include <linux/filter.h>
  40 #include <linux/highmem.h>
  41 #include <linux/highuid.h>
  42 #include <linux/mman.h>
  43 #include <linux/ipv6.h>
  44 #include <linux/in.h>
  45 #include <linux/icmpv6.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/sysctl.h>
  48 #include <linux/binfmts.h>
  49 #include <linux/dnotify.h>
  50 #include <linux/security.h>
  51 #include <linux/compat.h>
  52 #include <linux/vfs.h>
  53 #include <linux/netfilter_ipv4/ip_tables.h>
  54 #include <linux/ptrace.h>
  55 #include <linux/highuid.h>
  56
  57 #include <asm/types.h>
  58 #include <asm/ipc.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/fpumacro.h>
  61 #include <asm/semaphore.h>
  62 #include <asm/mmu_context.h>
  63 #include <asm/a.out.h>
  64
  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_fstatat64(unsigned int dfd, char __user *filename,
 431                 struct compat_stat64 __user * statbuf, int flag)
 432 {
 433         struct kstat stat;
 434         int error = -EINVAL;
 435
 436         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 437                 goto out;
 438
 439         if (flag & AT_SYMLINK_NOFOLLOW)
 440                 error = vfs_lstat_fd(dfd, filename, &stat);
 441         else
 442                 error = vfs_stat_fd(dfd, filename, &stat);
 443
 444         if (!error)
 445                 error = cp_compat_stat64(&stat, statbuf);
 446
 447 out:
 448         return error;
 449 }
 450
 451 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 452 {
 453         return sys_sysfs(option, arg1, arg2);
 454 }
 455
 456 struct sysinfo32 {
 457         s32 uptime;
 458         u32 loads[3];
 459         u32 totalram;
 460         u32 freeram;
 461         u32 sharedram;
 462         u32 bufferram;
 463         u32 totalswap;
 464         u32 freeswap;
 465         unsigned short procs;
 466         unsigned short pad;
 467         u32 totalhigh;
 468         u32 freehigh;
 469         u32 mem_unit;
 470         char _f[20-2*sizeof(int)-sizeof(int)];
 471 };
 472
 473 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 474 {
 475         struct sysinfo s;
 476         int ret, err;
 477         int bitcount = 0;
 478         mm_segment_t old_fs = get_fs ();
 479
 480         set_fs(KERNEL_DS);
 481         ret = sys_sysinfo((struct sysinfo __user *) &s);
 482         set_fs(old_fs);
 483         /* Check to see if any memory value is too large for 32-bit and
 484          * scale down if needed.
 485          */
 486         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 487                 while (s.mem_unit < PAGE_SIZE) {
 488                         s.mem_unit <<= 1;
 489                         bitcount++;
 490                 }
 491                 s.totalram >>= bitcount;
 492                 s.freeram >>= bitcount;
 493                 s.sharedram >>= bitcount;
 494                 s.bufferram >>= bitcount;
 495                 s.totalswap >>= bitcount;
 496                 s.freeswap >>= bitcount;
 497                 s.totalhigh >>= bitcount;
 498                 s.freehigh >>= bitcount;
 499         }
 500
 501         err = put_user (s.uptime, &info->uptime);
 502         err |= __put_user (s.loads[0], &info->loads[0]);
 503         err |= __put_user (s.loads[1], &info->loads[1]);
 504         err |= __put_user (s.loads[2], &info->loads[2]);
 505         err |= __put_user (s.totalram, &info->totalram);
 506         err |= __put_user (s.freeram, &info->freeram);
 507         err |= __put_user (s.sharedram, &info->sharedram);
 508         err |= __put_user (s.bufferram, &info->bufferram);
 509         err |= __put_user (s.totalswap, &info->totalswap);
 510         err |= __put_user (s.freeswap, &info->freeswap);
 511         err |= __put_user (s.procs, &info->procs);
 512         err |= __put_user (s.totalhigh, &info->totalhigh);
 513         err |= __put_user (s.freehigh, &info->freehigh);
 514         err |= __put_user (s.mem_unit, &info->mem_unit);
 515         if (err)
 516                 return -EFAULT;
 517         return ret;
 518 }
 519
 520 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 521 {
 522         struct timespec t;
 523         int ret;
 524         mm_segment_t old_fs = get_fs ();
 525
 526         set_fs (KERNEL_DS);
 527         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 528         set_fs (old_fs);
 529         if (put_compat_timespec(&t, interval))
 530                 return -EFAULT;
 531         return ret;
 532 }
 533
 534 asmlinkage long compat_sys_rt_sigprocmask(int how,
 535                                           compat_sigset_t __user *set,
 536                                           compat_sigset_t __user *oset,
 537                                           compat_size_t sigsetsize)
 538 {
 539         sigset_t s;
 540         compat_sigset_t s32;
 541         int ret;
 542         mm_segment_t old_fs = get_fs();
 543
 544         if (set) {
 545                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 546                         return -EFAULT;
 547                 switch (_NSIG_WORDS) {
 548                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 549                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 550                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 551                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 552                 }
 553         }
 554         set_fs (KERNEL_DS);
 555         ret = sys_rt_sigprocmask(how,
 556                                  set ? (sigset_t __user *) &s : NULL,
 557                                  oset ? (sigset_t __user *) &s : NULL,
 558                                  sigsetsize);
 559         set_fs (old_fs);
 560         if (ret) return ret;
 561         if (oset) {
 562                 switch (_NSIG_WORDS) {
 563                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 564                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 565                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 566                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 567                 }
 568                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 569                         return -EFAULT;
 570         }
 571         return 0;
 572 }
 573
 574 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 575                                     compat_size_t sigsetsize)
 576 {
 577         sigset_t s;
 578         compat_sigset_t s32;
 579         int ret;
 580         mm_segment_t old_fs = get_fs();
 581
 582         set_fs (KERNEL_DS);
 583         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 584         set_fs (old_fs);
 585         if (!ret) {
 586                 switch (_NSIG_WORDS) {
 587                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 588                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 589                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 590                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 591                 }
 592                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 593                         return -EFAULT;
 594         }
 595         return ret;
 596 }
 597
 598 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 599                                            struct compat_siginfo __user *uinfo)
 600 {
 601         siginfo_t info;
 602         int ret;
 603         mm_segment_t old_fs = get_fs();
 604
 605         if (copy_siginfo_from_user32(&info, uinfo))
 606                 return -EFAULT;
 607
 608         set_fs (KERNEL_DS);
 609         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 610         set_fs (old_fs);
 611         return ret;
 612 }
 613
 614 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 615                                      struct old_sigaction32 __user *oact)
 616 {
 617         struct k_sigaction new_ka, old_ka;
 618         int ret;
 619
 620         if (sig < 0) {
 621                 set_thread_flag(TIF_NEWSIGNALS);
 622                 sig = -sig;
 623         }
 624
 625         if (act) {
 626                 compat_old_sigset_t mask;
 627                 u32 u_handler, u_restorer;
 628
 629                 ret = get_user(u_handler, &act->sa_handler);
 630                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 631                 ret |= __get_user(u_restorer, &act->sa_restorer);
 632                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 633                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 634                 ret |= __get_user(mask, &act->sa_mask);
 635                 if (ret)
 636                         return ret;
 637                 new_ka.ka_restorer = NULL;
 638                 siginitset(&new_ka.sa.sa_mask, mask);
 639         }
 640
 641         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 642
 643         if (!ret && oact) {
 644                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 645                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 646                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 647                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 648         }
 649
 650         return ret;
 651 }
 652
 653 asmlinkage long compat_sys_rt_sigaction(int sig,
 654                                         struct sigaction32 __user *act,
 655                                         struct sigaction32 __user *oact,
 656                                         void __user *restorer,
 657                                         compat_size_t sigsetsize)
 658 {
 659         struct k_sigaction new_ka, old_ka;
 660         int ret;
 661         compat_sigset_t set32;
 662
 663         /* XXX: Don't preclude handling different sized sigset_t's.  */
 664         if (sigsetsize != sizeof(compat_sigset_t))
 665                 return -EINVAL;
 666
 667         /* All tasks which use RT signals (effectively) use
 668          * new style signals.
 669          */
 670         set_thread_flag(TIF_NEWSIGNALS);
 671
 672         if (act) {
 673                 u32 u_handler, u_restorer;
 674
 675                 new_ka.ka_restorer = restorer;
 676                 ret = get_user(u_handler, &act->sa_handler);
 677                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 678                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 679                 switch (_NSIG_WORDS) {
 680                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 681                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 682                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 683                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 684                 }
 685                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 686                 ret |= __get_user(u_restorer, &act->sa_restorer);
 687                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 688                 if (ret)
 689                         return -EFAULT;
 690         }
 691
 692         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 693
 694         if (!ret && oact) {
 695                 switch (_NSIG_WORDS) {
 696                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 697                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 698                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 699                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 700                 }
 701                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 702                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 703                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 704                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 705                 if (ret)
 706                         ret = -EFAULT;
 707         }
 708
 709         return ret;
 710 }
 711
 712 /*
 713  * sparc32_execve() executes a new program after the asm stub has set
 714  * things up for us.  This should basically do what I want it to.
 715  */
 716 asmlinkage long sparc32_execve(struct pt_regs *regs)
 717 {
 718         int error, base = 0;
 719         char *filename;
 720
 721         /* User register window flush is done by entry.S */
 722
 723         /* Check for indirect call. */
 724         if ((u32)regs->u_regs[UREG_G1] == 0)
 725                 base = 1;
 726
 727         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 728         error = PTR_ERR(filename);
 729         if (IS_ERR(filename))
 730                 goto out;
 731
 732         error = compat_do_execve(filename,
 733                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 734                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 735
 736         putname(filename);
 737
 738         if (!error) {
 739                 fprs_write(0);
 740                 current_thread_info()->xfsr[0] = 0;
 741                 current_thread_info()->fpsaved[0] = 0;
 742                 regs->tstate &= ~TSTATE_PEF;
 743                 task_lock(current);
 744                 current->ptrace &= ~PT_DTRACE;
 745                 task_unlock(current);
 746         }
 747 out:
 748         return error;
 749 }
 750
 751 #ifdef CONFIG_MODULES
 752
 753 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 754                                   const char __user *uargs)
 755 {
 756         return sys_init_module(umod, len, uargs);
 757 }
 758
 759 asmlinkage long sys32_delete_module(const char __user *name_user,
 760                                     unsigned int flags)
 761 {
 762         return sys_delete_module(name_user, flags);
 763 }
 764
 765 #else /* CONFIG_MODULES */
 766
 767 asmlinkage long sys32_init_module(const char __user *name_user,
 768                                   struct module __user *mod_user)
 769 {
 770         return -ENOSYS;
 771 }
 772
 773 asmlinkage long sys32_delete_module(const char __user *name_user)
 774 {
 775         return -ENOSYS;
 776 }
 777
 778 #endif  /* CONFIG_MODULES */
 779
 780 /* Translations due to time_t size differences.  Which affects all
 781    sorts of things, like timeval and itimerval.  */
 782
 783 extern struct timezone sys_tz;
 784
 785 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 786                                    struct timezone __user *tz)
 787 {
 788         if (tv) {
 789                 struct timeval ktv;
 790                 do_gettimeofday(&ktv);
 791                 if (put_tv32(tv, &ktv))
 792                         return -EFAULT;
 793         }
 794         if (tz) {
 795                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 796                         return -EFAULT;
 797         }
 798         return 0;
 799 }
 800
 801 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 802 {
 803         long usec;
 804
 805         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 806                 return -EFAULT;
 807         if (__get_user(o->tv_sec, &i->tv_sec))
 808                 return -EFAULT;
 809         if (__get_user(usec, &i->tv_usec))
 810                 return -EFAULT;
 811         o->tv_nsec = usec * 1000;
 812         return 0;
 813 }
 814
 815 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 816                                    struct timezone __user *tz)
 817 {
 818         struct timespec kts;
 819         struct timezone ktz;
 820
 821         if (tv) {
 822                 if (get_ts32(&kts, tv))
 823                         return -EFAULT;
 824         }
 825         if (tz) {
 826                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 827                         return -EFAULT;
 828         }
 829
 830         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 831 }
 832
 833 asmlinkage long sys32_utimes(char __user *filename,
 834                              struct compat_timeval __user *tvs)
 835 {
 836         struct timeval ktvs[2];
 837
 838         if (tvs) {
 839                 if (get_tv32(&ktvs[0], tvs) ||
 840                     get_tv32(&ktvs[1], 1+tvs))
 841                         return -EFAULT;
 842         }
 843
 844         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 845 }
 846
 847 /* These are here just in case some old sparc32 binary calls it. */
 848 asmlinkage long sys32_pause(void)
 849 {
 850         current->state = TASK_INTERRUPTIBLE;
 851         schedule();
 852         return -ERESTARTNOHAND;
 853 }
 854
 855 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 856                                         char __user *ubuf,
 857                                         compat_size_t count,
 858                                         unsigned long poshi,
 859                                         unsigned long poslo)
 860 {
 861         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 862 }
 863
 864 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 865                                          char __user *ubuf,
 866                                          compat_size_t count,
 867                                          unsigned long poshi,
 868                                          unsigned long poslo)
 869 {
 870         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 871 }
 872
 873 asmlinkage long compat_sys_readahead(int fd,
 874                                      unsigned long offhi,
 875                                      unsigned long offlo,
 876                                      compat_size_t count)
 877 {
 878         return sys_readahead(fd, (offhi << 32) | offlo, count);
 879 }
 880
 881 long compat_sys_fadvise64(int fd,
 882                           unsigned long offhi,
 883                           unsigned long offlo,
 884                           compat_size_t len, int advice)
 885 {
 886         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 887 }
 888
 889 long compat_sys_fadvise64_64(int fd,
 890                              unsigned long offhi, unsigned long offlo,
 891                              unsigned long lenhi, unsigned long lenlo,
 892                              int advice)
 893 {
 894         return sys_fadvise64_64(fd,
 895                                 (offhi << 32) | offlo,
 896                                 (lenhi << 32) | lenlo,
 897                                 advice);
 898 }
 899
 900 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 901                                     compat_off_t __user *offset,
 902                                     compat_size_t count)
 903 {
 904         mm_segment_t old_fs = get_fs();
 905         int ret;
 906         off_t of;
 907
 908         if (offset && get_user(of, offset))
 909                 return -EFAULT;
 910
 911         set_fs(KERNEL_DS);
 912         ret = sys_sendfile(out_fd, in_fd,
 913                            offset ? (off_t __user *) &of : NULL,
 914                            count);
 915         set_fs(old_fs);
 916
 917         if (offset && put_user(of, offset))
 918                 return -EFAULT;
 919
 920         return ret;
 921 }
 922
 923 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 924                                       compat_loff_t __user *offset,
 925                                       compat_size_t count)
 926 {
 927         mm_segment_t old_fs = get_fs();
 928         int ret;
 929         loff_t lof;
 930
 931         if (offset && get_user(lof, offset))
 932                 return -EFAULT;
 933
 934         set_fs(KERNEL_DS);
 935         ret = sys_sendfile64(out_fd, in_fd,
 936                              offset ? (loff_t __user *) &lof : NULL,
 937                              count);
 938         set_fs(old_fs);
 939
 940         if (offset && put_user(lof, offset))
 941                 return -EFAULT;
 942
 943         return ret;
 944 }
 945
 946 /* This is just a version for 32-bit applications which does
 947  * not force O_LARGEFILE on.
 948  */
 949
 950 asmlinkage long sparc32_open(const char __user *filename,
 951                              int flags, int mode)
 952 {
 953         return do_sys_open(AT_FDCWD, filename, flags, mode);
 954 }
 955
 956 extern unsigned long do_mremap(unsigned long addr,
 957         unsigned long old_len, unsigned long new_len,
 958         unsigned long flags, unsigned long new_addr);
 959
 960 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 961         unsigned long old_len, unsigned long new_len,
 962         unsigned long flags, u32 __new_addr)
 963 {
 964         struct vm_area_struct *vma;
 965         unsigned long ret = -EINVAL;
 966         unsigned long new_addr = __new_addr;
 967
 968         if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
 969                 goto out;
 970         if (addr > STACK_TOP32 - old_len)
 971                 goto out;
 972         down_write(&current->mm->mmap_sem);
 973         if (flags & MREMAP_FIXED) {
 974                 if (new_addr > STACK_TOP32 - new_len)
 975                         goto out_sem;
 976         } else if (addr > STACK_TOP32 - new_len) {
 977                 unsigned long map_flags = 0;
 978                 struct file *file = NULL;
 979
 980                 ret = -ENOMEM;
 981                 if (!(flags & MREMAP_MAYMOVE))
 982                         goto out_sem;
 983
 984                 vma = find_vma(current->mm, addr);
 985                 if (vma) {
 986                         if (vma->vm_flags & VM_SHARED)
 987                                 map_flags |= MAP_SHARED;
 988                         file = vma->vm_file;
 989                 }
 990
 991                 /* MREMAP_FIXED checked above. */
 992                 new_addr = get_unmapped_area(file, addr, new_len,
 993                                     vma ? vma->vm_pgoff : 0,
 994                                     map_flags);
 995                 ret = new_addr;
 996                 if (new_addr & ~PAGE_MASK)
 997                         goto out_sem;
 998                 flags |= MREMAP_FIXED;
 999         }
1000         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1001 out_sem:
1002         up_write(&current->mm->mmap_sem);
1003 out:
1004         return ret;
1005 }
1006
1007 struct __sysctl_args32 {
1008         u32 name;
1009         int nlen;
1010         u32 oldval;
1011         u32 oldlenp;
1012         u32 newval;
1013         u32 newlen;
1014         u32 __unused[4];
1015 };
1016
1017 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1018 {
1019 #ifndef CONFIG_SYSCTL
1020         return -ENOSYS;
1021 #else
1022         struct __sysctl_args32 tmp;
1023         int error;
1024         size_t oldlen, __user *oldlenp = NULL;
1025         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1026
1027         if (copy_from_user(&tmp, args, sizeof(tmp)))
1028                 return -EFAULT;
1029
1030         if (tmp.oldval && tmp.oldlenp) {
1031                 /* Duh, this is ugly and might not work if sysctl_args
1032                    is in read-only memory, but do_sysctl does indirectly
1033                    a lot of uaccess in both directions and we'd have to
1034                    basically copy the whole sysctl.c here, and
1035                    glibc's __sysctl uses rw memory for the structure
1036                    anyway.  */
1037                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1038                     put_user(oldlen, (size_t __user *)addr))
1039                         return -EFAULT;
1040                 oldlenp = (size_t __user *)addr;
1041         }
1042
1043         lock_kernel();
1044         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1045                           tmp.nlen,
1046                           (void __user *)(unsigned long) tmp.oldval,
1047                           oldlenp,
1048                           (void __user *)(unsigned long) tmp.newval,
1049                           tmp.newlen);
1050         unlock_kernel();
1051         if (oldlenp) {
1052                 if (!error) {
1053                         if (get_user(oldlen, (size_t __user *)addr) ||
1054                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1055                                 error = -EFAULT;
1056                 }
1057                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1058                         error = -EFAULT;
1059         }
1060         return error;
1061 #endif
1062 }
1063
1064 long sys32_lookup_dcookie(unsigned long cookie_high,
1065                           unsigned long cookie_low,
1066                           char __user *buf, size_t len)
1067 {
1068         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1069                                   buf, len);
1070 }
1071
1072 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)
1073 {
1074         return sys_sync_file_range(fd,
1075                                    (off_high << 32) | off_low,
1076                                    (nb_high << 32) | nb_low,
1077                                    flags);
1078 }