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         compat_ino_t ino;
 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         ino = stat->ino;
 348         if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
 349                 return -EOVERFLOW;
 350
 351         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 352         err |= put_user(stat->ino, &statbuf->st_ino);
 353         err |= put_user(stat->mode, &statbuf->st_mode);
 354         err |= put_user(stat->nlink, &statbuf->st_nlink);
 355         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 356         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 357         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 358         err |= put_user(stat->size, &statbuf->st_size);
 359         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 360         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 361         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 362         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 363         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 364         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 365         err |= put_user(stat->blksize, &statbuf->st_blksize);
 366         err |= put_user(stat->blocks, &statbuf->st_blocks);
 367         err |= put_user(0, &statbuf->__unused4[0]);
 368         err |= put_user(0, &statbuf->__unused4[1]);
 369
 370         return err;
 371 }
 372
 373 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
 374 {
 375         int err;
 376
 377         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
 378         err |= put_user(stat->ino, &statbuf->st_ino);
 379         err |= put_user(stat->mode, &statbuf->st_mode);
 380         err |= put_user(stat->nlink, &statbuf->st_nlink);
 381         err |= put_user(stat->uid, &statbuf->st_uid);
 382         err |= put_user(stat->gid, &statbuf->st_gid);
 383         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
 384         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
 385         err |= put_user(stat->size, &statbuf->st_size);
 386         err |= put_user(stat->blksize, &statbuf->st_blksize);
 387         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
 388         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
 389         err |= put_user(stat->blocks, &statbuf->st_blocks);
 390         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 391         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 392         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 393         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 394         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 395         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 396         err |= put_user(0, &statbuf->__unused4);
 397         err |= put_user(0, &statbuf->__unused5);
 398
 399         return err;
 400 }
 401
 402 asmlinkage long compat_sys_stat64(char __user * filename,
 403                 struct compat_stat64 __user *statbuf)
 404 {
 405         struct kstat stat;
 406         int error = vfs_stat(filename, &stat);
 407
 408         if (!error)
 409                 error = cp_compat_stat64(&stat, statbuf);
 410         return error;
 411 }
 412
 413 asmlinkage long compat_sys_lstat64(char __user * filename,
 414                 struct compat_stat64 __user *statbuf)
 415 {
 416         struct kstat stat;
 417         int error = vfs_lstat(filename, &stat);
 418
 419         if (!error)
 420                 error = cp_compat_stat64(&stat, statbuf);
 421         return error;
 422 }
 423
 424 asmlinkage long compat_sys_fstat64(unsigned int fd,
 425                 struct compat_stat64 __user * statbuf)
 426 {
 427         struct kstat stat;
 428         int error = vfs_fstat(fd, &stat);
 429
 430         if (!error)
 431                 error = cp_compat_stat64(&stat, statbuf);
 432         return error;
 433 }
 434
 435 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
 436                 struct compat_stat64 __user * statbuf, int flag)
 437 {
 438         struct kstat stat;
 439         int error = -EINVAL;
 440
 441         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 442                 goto out;
 443
 444         if (flag & AT_SYMLINK_NOFOLLOW)
 445                 error = vfs_lstat_fd(dfd, filename, &stat);
 446         else
 447                 error = vfs_stat_fd(dfd, filename, &stat);
 448
 449         if (!error)
 450                 error = cp_compat_stat64(&stat, statbuf);
 451
 452 out:
 453         return error;
 454 }
 455
 456 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 457 {
 458         return sys_sysfs(option, arg1, arg2);
 459 }
 460
 461 struct sysinfo32 {
 462         s32 uptime;
 463         u32 loads[3];
 464         u32 totalram;
 465         u32 freeram;
 466         u32 sharedram;
 467         u32 bufferram;
 468         u32 totalswap;
 469         u32 freeswap;
 470         unsigned short procs;
 471         unsigned short pad;
 472         u32 totalhigh;
 473         u32 freehigh;
 474         u32 mem_unit;
 475         char _f[20-2*sizeof(int)-sizeof(int)];
 476 };
 477
 478 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 479 {
 480         struct sysinfo s;
 481         int ret, err;
 482         int bitcount = 0;
 483         mm_segment_t old_fs = get_fs ();
 484
 485         set_fs(KERNEL_DS);
 486         ret = sys_sysinfo((struct sysinfo __user *) &s);
 487         set_fs(old_fs);
 488         /* Check to see if any memory value is too large for 32-bit and
 489          * scale down if needed.
 490          */
 491         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 492                 while (s.mem_unit < PAGE_SIZE) {
 493                         s.mem_unit <<= 1;
 494                         bitcount++;
 495                 }
 496                 s.totalram >>= bitcount;
 497                 s.freeram >>= bitcount;
 498                 s.sharedram >>= bitcount;
 499                 s.bufferram >>= bitcount;
 500                 s.totalswap >>= bitcount;
 501                 s.freeswap >>= bitcount;
 502                 s.totalhigh >>= bitcount;
 503                 s.freehigh >>= bitcount;
 504         }
 505
 506         err = put_user (s.uptime, &info->uptime);
 507         err |= __put_user (s.loads[0], &info->loads[0]);
 508         err |= __put_user (s.loads[1], &info->loads[1]);
 509         err |= __put_user (s.loads[2], &info->loads[2]);
 510         err |= __put_user (s.totalram, &info->totalram);
 511         err |= __put_user (s.freeram, &info->freeram);
 512         err |= __put_user (s.sharedram, &info->sharedram);
 513         err |= __put_user (s.bufferram, &info->bufferram);
 514         err |= __put_user (s.totalswap, &info->totalswap);
 515         err |= __put_user (s.freeswap, &info->freeswap);
 516         err |= __put_user (s.procs, &info->procs);
 517         err |= __put_user (s.totalhigh, &info->totalhigh);
 518         err |= __put_user (s.freehigh, &info->freehigh);
 519         err |= __put_user (s.mem_unit, &info->mem_unit);
 520         if (err)
 521                 return -EFAULT;
 522         return ret;
 523 }
 524
 525 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 526 {
 527         struct timespec t;
 528         int ret;
 529         mm_segment_t old_fs = get_fs ();
 530
 531         set_fs (KERNEL_DS);
 532         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 533         set_fs (old_fs);
 534         if (put_compat_timespec(&t, interval))
 535                 return -EFAULT;
 536         return ret;
 537 }
 538
 539 asmlinkage long compat_sys_rt_sigprocmask(int how,
 540                                           compat_sigset_t __user *set,
 541                                           compat_sigset_t __user *oset,
 542                                           compat_size_t sigsetsize)
 543 {
 544         sigset_t s;
 545         compat_sigset_t s32;
 546         int ret;
 547         mm_segment_t old_fs = get_fs();
 548
 549         if (set) {
 550                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 551                         return -EFAULT;
 552                 switch (_NSIG_WORDS) {
 553                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 554                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 555                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 556                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 557                 }
 558         }
 559         set_fs (KERNEL_DS);
 560         ret = sys_rt_sigprocmask(how,
 561                                  set ? (sigset_t __user *) &s : NULL,
 562                                  oset ? (sigset_t __user *) &s : NULL,
 563                                  sigsetsize);
 564         set_fs (old_fs);
 565         if (ret) return ret;
 566         if (oset) {
 567                 switch (_NSIG_WORDS) {
 568                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 569                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 570                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 571                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 572                 }
 573                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 574                         return -EFAULT;
 575         }
 576         return 0;
 577 }
 578
 579 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 580                                     compat_size_t sigsetsize)
 581 {
 582         sigset_t s;
 583         compat_sigset_t s32;
 584         int ret;
 585         mm_segment_t old_fs = get_fs();
 586
 587         set_fs (KERNEL_DS);
 588         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
 589         set_fs (old_fs);
 590         if (!ret) {
 591                 switch (_NSIG_WORDS) {
 592                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 593                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 594                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 595                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 596                 }
 597                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 598                         return -EFAULT;
 599         }
 600         return ret;
 601 }
 602
 603 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
 604                                            struct compat_siginfo __user *uinfo)
 605 {
 606         siginfo_t info;
 607         int ret;
 608         mm_segment_t old_fs = get_fs();
 609
 610         if (copy_siginfo_from_user32(&info, uinfo))
 611                 return -EFAULT;
 612
 613         set_fs (KERNEL_DS);
 614         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
 615         set_fs (old_fs);
 616         return ret;
 617 }
 618
 619 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
 620                                      struct old_sigaction32 __user *oact)
 621 {
 622         struct k_sigaction new_ka, old_ka;
 623         int ret;
 624
 625         if (sig < 0) {
 626                 set_thread_flag(TIF_NEWSIGNALS);
 627                 sig = -sig;
 628         }
 629
 630         if (act) {
 631                 compat_old_sigset_t mask;
 632                 u32 u_handler, u_restorer;
 633
 634                 ret = get_user(u_handler, &act->sa_handler);
 635                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 636                 ret |= __get_user(u_restorer, &act->sa_restorer);
 637                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 638                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 639                 ret |= __get_user(mask, &act->sa_mask);
 640                 if (ret)
 641                         return ret;
 642                 new_ka.ka_restorer = NULL;
 643                 siginitset(&new_ka.sa.sa_mask, mask);
 644         }
 645
 646         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 647
 648         if (!ret && oact) {
 649                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 650                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 651                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 652                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
 653         }
 654
 655         return ret;
 656 }
 657
 658 asmlinkage long compat_sys_rt_sigaction(int sig,
 659                                         struct sigaction32 __user *act,
 660                                         struct sigaction32 __user *oact,
 661                                         void __user *restorer,
 662                                         compat_size_t sigsetsize)
 663 {
 664         struct k_sigaction new_ka, old_ka;
 665         int ret;
 666         compat_sigset_t set32;
 667
 668         /* XXX: Don't preclude handling different sized sigset_t's.  */
 669         if (sigsetsize != sizeof(compat_sigset_t))
 670                 return -EINVAL;
 671
 672         /* All tasks which use RT signals (effectively) use
 673          * new style signals.
 674          */
 675         set_thread_flag(TIF_NEWSIGNALS);
 676
 677         if (act) {
 678                 u32 u_handler, u_restorer;
 679
 680                 new_ka.ka_restorer = restorer;
 681                 ret = get_user(u_handler, &act->sa_handler);
 682                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 683                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 684                 switch (_NSIG_WORDS) {
 685                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
 686                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
 687                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
 688                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
 689                 }
 690                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 691                 ret |= __get_user(u_restorer, &act->sa_restorer);
 692                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 693                 if (ret)
 694                         return -EFAULT;
 695         }
 696
 697         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 698
 699         if (!ret && oact) {
 700                 switch (_NSIG_WORDS) {
 701                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 702                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 703                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 704                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 705                 }
 706                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 707                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 708                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 709                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 710                 if (ret)
 711                         ret = -EFAULT;
 712         }
 713
 714         return ret;
 715 }
 716
 717 /*
 718  * sparc32_execve() executes a new program after the asm stub has set
 719  * things up for us.  This should basically do what I want it to.
 720  */
 721 asmlinkage long sparc32_execve(struct pt_regs *regs)
 722 {
 723         int error, base = 0;
 724         char *filename;
 725
 726         /* User register window flush is done by entry.S */
 727
 728         /* Check for indirect call. */
 729         if ((u32)regs->u_regs[UREG_G1] == 0)
 730                 base = 1;
 731
 732         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
 733         error = PTR_ERR(filename);
 734         if (IS_ERR(filename))
 735                 goto out;
 736
 737         error = compat_do_execve(filename,
 738                                  compat_ptr(regs->u_regs[base + UREG_I1]),
 739                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
 740
 741         putname(filename);
 742
 743         if (!error) {
 744                 fprs_write(0);
 745                 current_thread_info()->xfsr[0] = 0;
 746                 current_thread_info()->fpsaved[0] = 0;
 747                 regs->tstate &= ~TSTATE_PEF;
 748                 task_lock(current);
 749                 current->ptrace &= ~PT_DTRACE;
 750                 task_unlock(current);
 751         }
 752 out:
 753         return error;
 754 }
 755
 756 #ifdef CONFIG_MODULES
 757
 758 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 759                                   const char __user *uargs)
 760 {
 761         return sys_init_module(umod, len, uargs);
 762 }
 763
 764 asmlinkage long sys32_delete_module(const char __user *name_user,
 765                                     unsigned int flags)
 766 {
 767         return sys_delete_module(name_user, flags);
 768 }
 769
 770 #else /* CONFIG_MODULES */
 771
 772 asmlinkage long sys32_init_module(const char __user *name_user,
 773                                   struct module __user *mod_user)
 774 {
 775         return -ENOSYS;
 776 }
 777
 778 asmlinkage long sys32_delete_module(const char __user *name_user)
 779 {
 780         return -ENOSYS;
 781 }
 782
 783 #endif  /* CONFIG_MODULES */
 784
 785 /* Translations due to time_t size differences.  Which affects all
 786    sorts of things, like timeval and itimerval.  */
 787
 788 extern struct timezone sys_tz;
 789
 790 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
 791                                    struct timezone __user *tz)
 792 {
 793         if (tv) {
 794                 struct timeval ktv;
 795                 do_gettimeofday(&ktv);
 796                 if (put_tv32(tv, &ktv))
 797                         return -EFAULT;
 798         }
 799         if (tz) {
 800                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 801                         return -EFAULT;
 802         }
 803         return 0;
 804 }
 805
 806 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 807 {
 808         long usec;
 809
 810         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 811                 return -EFAULT;
 812         if (__get_user(o->tv_sec, &i->tv_sec))
 813                 return -EFAULT;
 814         if (__get_user(usec, &i->tv_usec))
 815                 return -EFAULT;
 816         o->tv_nsec = usec * 1000;
 817         return 0;
 818 }
 819
 820 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
 821                                    struct timezone __user *tz)
 822 {
 823         struct timespec kts;
 824         struct timezone ktz;
 825
 826         if (tv) {
 827                 if (get_ts32(&kts, tv))
 828                         return -EFAULT;
 829         }
 830         if (tz) {
 831                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 832                         return -EFAULT;
 833         }
 834
 835         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 836 }
 837
 838 asmlinkage long sys32_utimes(char __user *filename,
 839                              struct compat_timeval __user *tvs)
 840 {
 841         struct timeval ktvs[2];
 842
 843         if (tvs) {
 844                 if (get_tv32(&ktvs[0], tvs) ||
 845                     get_tv32(&ktvs[1], 1+tvs))
 846                         return -EFAULT;
 847         }
 848
 849         return do_utimes(AT_FDCWD, filename, (tvs ? &ktvs[0] : NULL));
 850 }
 851
 852 /* These are here just in case some old sparc32 binary calls it. */
 853 asmlinkage long sys32_pause(void)
 854 {
 855         current->state = TASK_INTERRUPTIBLE;
 856         schedule();
 857         return -ERESTARTNOHAND;
 858 }
 859
 860 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 861                                         char __user *ubuf,
 862                                         compat_size_t count,
 863                                         unsigned long poshi,
 864                                         unsigned long poslo)
 865 {
 866         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 867 }
 868
 869 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 870                                          char __user *ubuf,
 871                                          compat_size_t count,
 872                                          unsigned long poshi,
 873                                          unsigned long poslo)
 874 {
 875         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 876 }
 877
 878 asmlinkage long compat_sys_readahead(int fd,
 879                                      unsigned long offhi,
 880                                      unsigned long offlo,
 881                                      compat_size_t count)
 882 {
 883         return sys_readahead(fd, (offhi << 32) | offlo, count);
 884 }
 885
 886 long compat_sys_fadvise64(int fd,
 887                           unsigned long offhi,
 888                           unsigned long offlo,
 889                           compat_size_t len, int advice)
 890 {
 891         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 892 }
 893
 894 long compat_sys_fadvise64_64(int fd,
 895                              unsigned long offhi, unsigned long offlo,
 896                              unsigned long lenhi, unsigned long lenlo,
 897                              int advice)
 898 {
 899         return sys_fadvise64_64(fd,
 900                                 (offhi << 32) | offlo,
 901                                 (lenhi << 32) | lenlo,
 902                                 advice);
 903 }
 904
 905 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 906                                     compat_off_t __user *offset,
 907                                     compat_size_t count)
 908 {
 909         mm_segment_t old_fs = get_fs();
 910         int ret;
 911         off_t of;
 912
 913         if (offset && get_user(of, offset))
 914                 return -EFAULT;
 915
 916         set_fs(KERNEL_DS);
 917         ret = sys_sendfile(out_fd, in_fd,
 918                            offset ? (off_t __user *) &of : NULL,
 919                            count);
 920         set_fs(old_fs);
 921
 922         if (offset && put_user(of, offset))
 923                 return -EFAULT;
 924
 925         return ret;
 926 }
 927
 928 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 929                                       compat_loff_t __user *offset,
 930                                       compat_size_t count)
 931 {
 932         mm_segment_t old_fs = get_fs();
 933         int ret;
 934         loff_t lof;
 935
 936         if (offset && get_user(lof, offset))
 937                 return -EFAULT;
 938
 939         set_fs(KERNEL_DS);
 940         ret = sys_sendfile64(out_fd, in_fd,
 941                              offset ? (loff_t __user *) &lof : NULL,
 942                              count);
 943         set_fs(old_fs);
 944
 945         if (offset && put_user(lof, offset))
 946                 return -EFAULT;
 947
 948         return ret;
 949 }
 950
 951 /* This is just a version for 32-bit applications which does
 952  * not force O_LARGEFILE on.
 953  */
 954
 955 asmlinkage long sparc32_open(const char __user *filename,
 956                              int flags, int mode)
 957 {
 958         return do_sys_open(AT_FDCWD, filename, flags, mode);
 959 }
 960
 961 extern unsigned long do_mremap(unsigned long addr,
 962         unsigned long old_len, unsigned long new_len,
 963         unsigned long flags, unsigned long new_addr);
 964
 965 asmlinkage unsigned long sys32_mremap(unsigned long addr,
 966         unsigned long old_len, unsigned long new_len,
 967         unsigned long flags, u32 __new_addr)
 968 {
 969         struct vm_area_struct *vma;
 970         unsigned long ret = -EINVAL;
 971         unsigned long new_addr = __new_addr;
 972
 973         if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
 974                 goto out;
 975         if (addr > STACK_TOP32 - old_len)
 976                 goto out;
 977         down_write(&current->mm->mmap_sem);
 978         if (flags & MREMAP_FIXED) {
 979                 if (new_addr > STACK_TOP32 - new_len)
 980                         goto out_sem;
 981         } else if (addr > STACK_TOP32 - new_len) {
 982                 unsigned long map_flags = 0;
 983                 struct file *file = NULL;
 984
 985                 ret = -ENOMEM;
 986                 if (!(flags & MREMAP_MAYMOVE))
 987                         goto out_sem;
 988
 989                 vma = find_vma(current->mm, addr);
 990                 if (vma) {
 991                         if (vma->vm_flags & VM_SHARED)
 992                                 map_flags |= MAP_SHARED;
 993                         file = vma->vm_file;
 994                 }
 995
 996                 /* MREMAP_FIXED checked above. */
 997                 new_addr = get_unmapped_area(file, addr, new_len,
 998                                     vma ? vma->vm_pgoff : 0,
 999                                     map_flags);
1000                 ret = new_addr;
1001                 if (new_addr & ~PAGE_MASK)
1002                         goto out_sem;
1003                 flags |= MREMAP_FIXED;
1004         }
1005         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1006 out_sem:
1007         up_write(&current->mm->mmap_sem);
1008 out:
1009         return ret;
1010 }
1011
1012 struct __sysctl_args32 {
1013         u32 name;
1014         int nlen;
1015         u32 oldval;
1016         u32 oldlenp;
1017         u32 newval;
1018         u32 newlen;
1019         u32 __unused[4];
1020 };
1021
1022 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1023 {
1024 #ifndef CONFIG_SYSCTL_SYSCALL
1025         return -ENOSYS;
1026 #else
1027         struct __sysctl_args32 tmp;
1028         int error;
1029         size_t oldlen, __user *oldlenp = NULL;
1030         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1031
1032         if (copy_from_user(&tmp, args, sizeof(tmp)))
1033                 return -EFAULT;
1034
1035         if (tmp.oldval && tmp.oldlenp) {
1036                 /* Duh, this is ugly and might not work if sysctl_args
1037                    is in read-only memory, but do_sysctl does indirectly
1038                    a lot of uaccess in both directions and we'd have to
1039                    basically copy the whole sysctl.c here, and
1040                    glibc's __sysctl uses rw memory for the structure
1041                    anyway.  */
1042                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1043                     put_user(oldlen, (size_t __user *)addr))
1044                         return -EFAULT;
1045                 oldlenp = (size_t __user *)addr;
1046         }
1047
1048         lock_kernel();
1049         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1050                           tmp.nlen,
1051                           (void __user *)(unsigned long) tmp.oldval,
1052                           oldlenp,
1053                           (void __user *)(unsigned long) tmp.newval,
1054                           tmp.newlen);
1055         unlock_kernel();
1056         if (oldlenp) {
1057                 if (!error) {
1058                         if (get_user(oldlen, (size_t __user *)addr) ||
1059                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1060                                 error = -EFAULT;
1061                 }
1062                 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1063                         error = -EFAULT;
1064         }
1065         return error;
1066 #endif
1067 }
1068
1069 long sys32_lookup_dcookie(unsigned long cookie_high,
1070                           unsigned long cookie_low,
1071                           char __user *buf, size_t len)
1072 {
1073         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1074                                   buf, len);
1075 }
1076
1077 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)
1078 {
1079         return sys_sync_file_range(fd,
1080                                    (off_high << 32) | off_low,
1081                                    (nb_high << 32) | nb_low,
1082                                    flags);
1083 }