arch/sparc64/kernel/sys_sparc32.c

   1 /* $Id: sys_sparc32.c,v 1.184 2002/02/09 19:49:31 davem Exp $
   2  * sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   6  *
   7  * These routines maintain argument size conversion between 32bit and 64bit
   8  * environment.
   9  */
  10
  11 #include <linux/config.h>
  12 #include <linux/kernel.h>
  13 #include <linux/sched.h>
  14 #include <linux/fs.h>
  15 #include <linux/mm.h>
  16 #include <linux/file.h>
  17 #include <linux/signal.h>
  18 #include <linux/resource.h>
  19 #include <linux/times.h>
  20 #include <linux/utsname.h>
  21 #include <linux/timex.h>
  22 #include <linux/smp.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/sem.h>
  25 #include <linux/msg.h>
  26 #include <linux/shm.h>
  27 #include <linux/slab.h>
  28 #include <linux/uio.h>
  29 #include <linux/nfs_fs.h>
  30 #include <linux/quota.h>
  31 #include <linux/module.h>
  32 #include <linux/sunrpc/svc.h>
  33 #include <linux/nfsd/nfsd.h>
  34 #include <linux/nfsd/cache.h>
  35 #include <linux/nfsd/xdr.h>
  36 #include <linux/nfsd/syscall.h>
  37 #include <linux/poll.h>
  38 #include <linux/personality.h>
  39 #include <linux/stat.h>
  40 #include <linux/filter.h>
  41 #include <linux/highmem.h>
  42 #include <linux/highuid.h>
  43 #include <linux/mman.h>
  44 #include <linux/ipv6.h>
  45 #include <linux/in.h>
  46 #include <linux/icmpv6.h>
  47 #include <linux/syscalls.h>
  48 #include <linux/sysctl.h>
  49 #include <linux/binfmts.h>
  50 #include <linux/dnotify.h>
  51 #include <linux/security.h>
  52 #include <linux/compat.h>
  53 #include <linux/vfs.h>
  54 #include <linux/netfilter_ipv4/ip_tables.h>
  55 #include <linux/ptrace.h>
  56 #include <linux/highuid.h>
  57
  58 #include <asm/types.h>
  59 #include <asm/ipc.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/fpumacro.h>
  62 #include <asm/semaphore.h>
  63 #include <asm/mmu_context.h>
  64
  65 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
  66 {
  67         return sys_chown(filename, low2highuid(user), low2highgid(group));
  68 }
  69
  70 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
  71 {
  72         return sys_lchown(filename, low2highuid(user), low2highgid(group));
  73 }
  74
  75 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
  76 {
  77         return sys_fchown(fd, low2highuid(user), low2highgid(group));
  78 }
  79
  80 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
  81 {
  82         return sys_setregid(low2highgid(rgid), low2highgid(egid));
  83 }
  84
  85 asmlinkage long sys32_setgid16(u16 gid)
  86 {
  87         return sys_setgid((gid_t)gid);
  88 }
  89
  90 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
  91 {
  92         return sys_setreuid(low2highuid(ruid), low2highuid(euid));
  93 }
  94
  95 asmlinkage long sys32_setuid16(u16 uid)
  96 {
  97         return sys_setuid((uid_t)uid);
  98 }
  99
 100 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
 101 {
 102         return sys_setresuid(low2highuid(ruid), low2highuid(euid),
 103                 low2highuid(suid));
 104 }
 105
 106 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
 107 {
 108         int retval;
 109
 110         if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
 111             !(retval = put_user(high2lowuid(current->euid), euid)))
 112                 retval = put_user(high2lowuid(current->suid), suid);
 113
 114         return retval;
 115 }
 116
 117 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
 118 {
 119         return sys_setresgid(low2highgid(rgid), low2highgid(egid),
 120                 low2highgid(sgid));
 121 }
 122
 123 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
 124 {
 125         int retval;
 126
 127         if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
 128             !(retval = put_user(high2lowgid(current->egid), egid)))
 129                 retval = put_user(high2lowgid(current->sgid), sgid);
 130
 131         return retval;
 132 }
 133
 134 asmlinkage long sys32_setfsuid16(u16 uid)
 135 {
 136         return sys_setfsuid((uid_t)uid);
 137 }
 138
 139 asmlinkage long sys32_setfsgid16(u16 gid)
 140 {
 141         return sys_setfsgid((gid_t)gid);
 142 }
 143
 144 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
 145 {
 146         int i;
 147         u16 group;
 148
 149         for (i = 0; i < group_info->ngroups; i++) {
 150                 group = (u16)GROUP_AT(group_info, i);
 151                 if (put_user(group, grouplist+i))
 152                         return -EFAULT;
 153         }
 154
 155         return 0;
 156 }
 157
 158 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
 159 {
 160         int i;
 161         u16 group;
 162
 163         for (i = 0; i < group_info->ngroups; i++) {
 164                 if (get_user(group, grouplist+i))
 165                         return  -EFAULT;
 166                 GROUP_AT(group_info, i) = (gid_t)group;
 167         }
 168
 169         return 0;
 170 }
 171
 172 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
 173 {
 174         int i;
 175
 176         if (gidsetsize < 0)
 177                 return -EINVAL;
 178
 179         get_group_info(current->group_info);
 180         i = current->group_info->ngroups;
 181         if (gidsetsize) {
 182                 if (i > gidsetsize) {
 183                         i = -EINVAL;
 184                         goto out;
 185                 }
 186                 if (groups16_to_user(grouplist, current->group_info)) {
 187                         i = -EFAULT;
 188                         goto out;
 189                 }
 190         }
 191 out:
 192         put_group_info(current->group_info);
 193         return i;
 194 }
 195
 196 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 197 {
 198         struct group_info *group_info;
 199         int retval;
 200
 201         if (!capable(CAP_SETGID))
 202                 return -EPERM;
 203         if ((unsigned)gidsetsize > NGROUPS_MAX)
 204                 return -EINVAL;
 205
 206         group_info = groups_alloc(gidsetsize);
 207         if (!group_info)
 208                 return -ENOMEM;
 209         retval = groups16_from_user(group_info, grouplist);
 210         if (retval) {
 211                 put_group_info(group_info);
 212                 return retval;
 213         }
 214
 215         retval = set_current_groups(group_info);
 216         put_group_info(group_info);
 217
 218         return retval;
 219 }
 220
 221 asmlinkage long sys32_getuid16(void)
 222 {
 223         return high2lowuid(current->uid);
 224 }
 225
 226 asmlinkage long sys32_geteuid16(void)
 227 {
 228         return high2lowuid(current->euid);
 229 }
 230
 231 asmlinkage long sys32_getgid16(void)
 232 {
 233         return high2lowgid(current->gid);
 234 }
 235
 236 asmlinkage long sys32_getegid16(void)
 237 {
 238         return high2lowgid(current->egid);
 239 }
 240
 241 /* 32-bit timeval and related flotsam.  */
 242
 243 static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
 244 {
 245         return (!access_ok(VERIFY_READ, tv32, sizeof(*tv32)) ||
 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 struct msgbuf32 { s32 mtype; char mtext[1]; };
 258
 259 struct ipc_perm32 {
 260         key_t             key;
 261         compat_uid_t  uid;
 262         compat_gid_t  gid;
 263         compat_uid_t  cuid;
 264         compat_gid_t  cgid;
 265         compat_mode_t mode;
 266         unsigned short  seq;
 267 };
 268
 269 struct semid_ds32 {
 270         struct ipc_perm32 sem_perm;               /* permissions .. see ipc.h */
 271         compat_time_t   sem_otime;              /* last semop time */
 272         compat_time_t   sem_ctime;              /* last change time */
 273         u32 sem_base;              /* ptr to first semaphore in array */
 274         u32 sem_pending;          /* pending operations to be processed */
 275         u32 sem_pending_last;    /* last pending operation */
 276         u32 undo;                  /* undo requests on this array */
 277         unsigned short  sem_nsems;              /* no. of semaphores in array */
 278 };
 279
 280 struct semid64_ds32 {
 281         struct ipc64_perm sem_perm;               /* this structure is the same on sparc32 and sparc64 */
 282         unsigned int      __pad1;
 283         compat_time_t   sem_otime;
 284         unsigned int      __pad2;
 285         compat_time_t   sem_ctime;
 286         u32 sem_nsems;
 287         u32 __unused1;
 288         u32 __unused2;
 289 };
 290
 291 struct msqid_ds32
 292 {
 293         struct ipc_perm32 msg_perm;
 294         u32 msg_first;
 295         u32 msg_last;
 296         compat_time_t   msg_stime;
 297         compat_time_t   msg_rtime;
 298         compat_time_t   msg_ctime;
 299         u32 wwait;
 300         u32 rwait;
 301         unsigned short msg_cbytes;
 302         unsigned short msg_qnum;
 303         unsigned short msg_qbytes;
 304         compat_ipc_pid_t msg_lspid;
 305         compat_ipc_pid_t msg_lrpid;
 306 };
 307
 308 struct msqid64_ds32 {
 309         struct ipc64_perm msg_perm;
 310         unsigned int   __pad1;
 311         compat_time_t   msg_stime;
 312         unsigned int   __pad2;
 313         compat_time_t   msg_rtime;
 314         unsigned int   __pad3;
 315         compat_time_t   msg_ctime;
 316         unsigned int  msg_cbytes;
 317         unsigned int  msg_qnum;
 318         unsigned int  msg_qbytes;
 319         compat_pid_t msg_lspid;
 320         compat_pid_t msg_lrpid;
 321         unsigned int  __unused1;
 322         unsigned int  __unused2;
 323 };
 324
 325
 326 struct shmid_ds32 {
 327         struct ipc_perm32       shm_perm;
 328         int                     shm_segsz;
 329         compat_time_t         shm_atime;
 330         compat_time_t         shm_dtime;
 331         compat_time_t         shm_ctime;
 332         compat_ipc_pid_t    shm_cpid;
 333         compat_ipc_pid_t    shm_lpid;
 334         unsigned short          shm_nattch;
 335 };
 336
 337 struct shmid64_ds32 {
 338         struct ipc64_perm       shm_perm;
 339         unsigned int            __pad1;
 340         compat_time_t   shm_atime;
 341         unsigned int            __pad2;
 342         compat_time_t   shm_dtime;
 343         unsigned int            __pad3;
 344         compat_time_t   shm_ctime;
 345         compat_size_t   shm_segsz;
 346         compat_pid_t    shm_cpid;
 347         compat_pid_t    shm_lpid;
 348         unsigned int            shm_nattch;
 349         unsigned int            __unused1;
 350         unsigned int            __unused2;
 351 };
 352
 353
 354 /*
 355  * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation..
 356  *
 357  * This is really horribly ugly.
 358  */
 359 #define IPCOP_MASK(__x) (1UL << ((__x)&~IPC_64))
 360 static int do_sys32_semctl(int first, int second, int third,
 361                            compat_uptr_t __user *uptr)
 362 {
 363         union semun fourth;
 364         compat_uptr_t pad;
 365         int err = -EINVAL;
 366
 367         if (!uptr)
 368                 goto out;
 369         err = -EFAULT;
 370         if (get_user(pad, uptr))
 371                 goto out;
 372         if ((third & ~IPC_64) == SETVAL)
 373                 fourth.val = (int)pad;
 374         else
 375                 fourth.__pad = compat_ptr(pad);
 376         if (IPCOP_MASK (third) &
 377             (IPCOP_MASK (IPC_INFO) | IPCOP_MASK (SEM_INFO) | IPCOP_MASK (GETVAL) |
 378              IPCOP_MASK (GETPID) | IPCOP_MASK (GETNCNT) | IPCOP_MASK (GETZCNT) |
 379              IPCOP_MASK (GETALL) | IPCOP_MASK (SETALL) | IPCOP_MASK (IPC_RMID))) {
 380                 err = sys_semctl (first, second, third, fourth);
 381         } else if (third & IPC_64) {
 382                 struct semid64_ds s;
 383                 struct semid64_ds32 __user *usp = compat_ptr(pad);
 384                 mm_segment_t old_fs;
 385                 int need_back_translation;
 386
 387                 if (third == (IPC_SET|IPC_64)) {
 388                         err = get_user (s.sem_perm.uid, &usp->sem_perm.uid);
 389                         err |= __get_user (s.sem_perm.gid, &usp->sem_perm.gid);
 390                         err |= __get_user (s.sem_perm.mode, &usp->sem_perm.mode);
 391                         if (err)
 392                                 goto out;
 393                         fourth.__pad = (void __user *) &s;
 394                 }
 395                 need_back_translation =
 396                         (IPCOP_MASK (third) &
 397                          (IPCOP_MASK (SEM_STAT) | IPCOP_MASK (IPC_STAT))) != 0;
 398                 if (need_back_translation)
 399                         fourth.__pad = (void __user *) &s;
 400                 old_fs = get_fs ();
 401                 set_fs (KERNEL_DS);
 402                 err = sys_semctl (first, second, third, fourth);
 403                 set_fs (old_fs);
 404                 if (need_back_translation) {
 405                         int err2 = copy_to_user (&usp->sem_perm, &s.sem_perm, sizeof(struct ipc64_perm) + 2*sizeof(time_t));
 406                         err2 |= __put_user (s.sem_nsems, &usp->sem_nsems);
 407                         if (err2) err = -EFAULT;
 408                 }
 409         } else {
 410                 struct semid_ds s;
 411                 struct semid_ds32 __user *usp = compat_ptr(pad);
 412                 mm_segment_t old_fs;
 413                 int need_back_translation;
 414
 415                 if (third == IPC_SET) {
 416                         err = get_user (s.sem_perm.uid, &usp->sem_perm.uid);
 417                         err |= __get_user (s.sem_perm.gid, &usp->sem_perm.gid);
 418                         err |= __get_user (s.sem_perm.mode, &usp->sem_perm.mode);
 419                         if (err)
 420                                 goto out;
 421                         fourth.__pad = (void __user *) &s;
 422                 }
 423                 need_back_translation =
 424                         (IPCOP_MASK (third) &
 425                          (IPCOP_MASK (SEM_STAT) | IPCOP_MASK (IPC_STAT))) != 0;
 426                 if (need_back_translation)
 427                         fourth.__pad = (void __user *) &s;
 428                 old_fs = get_fs ();
 429                 set_fs (KERNEL_DS);
 430                 err = sys_semctl (first, second, third, fourth);
 431                 set_fs (old_fs);
 432                 if (need_back_translation) {
 433                         int err2 = put_user (s.sem_perm.key, &usp->sem_perm.key);
 434                         err2 |= __put_user (high2lowuid(s.sem_perm.uid), &usp->sem_perm.uid);
 435                         err2 |= __put_user (high2lowgid(s.sem_perm.gid), &usp->sem_perm.gid);
 436                         err2 |= __put_user (high2lowuid(s.sem_perm.cuid), &usp->sem_perm.cuid);
 437                         err2 |= __put_user (high2lowgid(s.sem_perm.cgid), &usp->sem_perm.cgid);
 438                         err2 |= __put_user (s.sem_perm.mode, &usp->sem_perm.mode);
 439                         err2 |= __put_user (s.sem_perm.seq, &usp->sem_perm.seq);
 440                         err2 |= __put_user (s.sem_otime, &usp->sem_otime);
 441                         err2 |= __put_user (s.sem_ctime, &usp->sem_ctime);
 442                         err2 |= __put_user (s.sem_nsems, &usp->sem_nsems);
 443                         if (err2) err = -EFAULT;
 444                 }
 445         }
 446 out:
 447         return err;
 448 }
 449
 450 static int do_sys32_msgsnd(int first, int second, int third,
 451                            void __user *uptr)
 452 {
 453         struct msgbuf32 __user *up = uptr;
 454         struct msgbuf *p;
 455         mm_segment_t old_fs;
 456         int err;
 457
 458         p = kmalloc(second + sizeof (struct msgbuf), GFP_USER);
 459         if (!p)
 460                 return -ENOMEM;
 461         err = -EFAULT;
 462         if (get_user (p->mtype, &up->mtype) ||
 463             __copy_from_user (p->mtext, &up->mtext, second))
 464                 goto out;
 465         old_fs = get_fs ();
 466         set_fs (KERNEL_DS);
 467         err = sys_msgsnd (first, (struct msgbuf __user *) p,
 468                           second, third);
 469         set_fs (old_fs);
 470 out:
 471         kfree (p);
 472         return err;
 473 }
 474
 475 static int do_sys32_msgrcv(int first, int second, int msgtyp, int third,
 476                            int version, void __user *uptr)
 477 {
 478         struct msgbuf32 __user *up;
 479         struct msgbuf *p;
 480         mm_segment_t old_fs;
 481         int err;
 482
 483         if (!version) {
 484                 struct ipc_kludge __user *uipck = uptr;
 485                 struct ipc_kludge ipck;
 486
 487                 err = -EINVAL;
 488                 if (!uptr)
 489                         goto out;
 490                 err = -EFAULT;
 491                 if (copy_from_user (&ipck, uipck,
 492                                     sizeof (struct ipc_kludge)))
 493                         goto out;
 494                 uptr = compat_ptr(ipck.msgp);
 495                 msgtyp = ipck.msgtyp;
 496         }
 497         err = -ENOMEM;
 498         p = kmalloc(second + sizeof (struct msgbuf), GFP_USER);
 499         if (!p)
 500                 goto out;
 501         old_fs = get_fs ();
 502         set_fs (KERNEL_DS);
 503         err = sys_msgrcv (first, (struct msgbuf __user *) p, second,
 504                           msgtyp, third);
 505         set_fs (old_fs);
 506         if (err < 0)
 507                 goto free_then_out;
 508         up = uptr;
 509         if (put_user (p->mtype, &up->mtype) ||
 510             __copy_to_user (&up->mtext, p->mtext, err))
 511                 err = -EFAULT;
 512 free_then_out:
 513         kfree (p);
 514 out:
 515         return err;
 516 }
 517
 518 static int do_sys32_msgctl(int first, int second, void __user *uptr)
 519 {
 520         int err;
 521
 522         if (IPCOP_MASK (second) &
 523             (IPCOP_MASK (IPC_INFO) | IPCOP_MASK (MSG_INFO) |
 524              IPCOP_MASK (IPC_RMID))) {
 525                 err = sys_msgctl (first, second, uptr);
 526         } else if (second & IPC_64) {
 527                 struct msqid64_ds m;
 528                 struct msqid64_ds32 __user *up = uptr;
 529                 mm_segment_t old_fs;
 530
 531                 if (second == (IPC_SET|IPC_64)) {
 532                         err = get_user (m.msg_perm.uid,
 533                                         &up->msg_perm.uid);
 534                         err |= __get_user (m.msg_perm.gid,
 535                                            &up->msg_perm.gid);
 536                         err |= __get_user (m.msg_perm.mode,
 537                                            &up->msg_perm.mode);
 538                         err |= __get_user (m.msg_qbytes,
 539                                            &up->msg_qbytes);
 540                         if (err)
 541                                 goto out;
 542                 }
 543                 old_fs = get_fs ();
 544                 set_fs (KERNEL_DS);
 545                 err = sys_msgctl(first, second,
 546                                  (struct msqid_ds __user *)&m);
 547                 set_fs (old_fs);
 548                 if (IPCOP_MASK (second) &
 549                     (IPCOP_MASK (MSG_STAT) | IPCOP_MASK (IPC_STAT))) {
 550                         int err2 = copy_to_user(&up->msg_perm,
 551                                                 &m.msg_perm,
 552                                                 (sizeof(struct ipc64_perm) + 3*sizeof(time_t)));
 553                         err2 |= __put_user (m.msg_cbytes,
 554                                             &up->msg_cbytes);
 555                         err2 |= __put_user (m.msg_qnum, &up->msg_qnum);
 556                         err2 |= __put_user (m.msg_qbytes,
 557                                             &up->msg_qbytes);
 558                         err2 |= __put_user (m.msg_lspid, &up->msg_lspid);
 559                         err2 |= __put_user (m.msg_lrpid, &up->msg_lrpid);
 560                         if (err2)
 561                                 err = -EFAULT;
 562                 }
 563         } else {
 564                 struct msqid_ds m;
 565                 struct msqid_ds32 __user *up = uptr;
 566                 mm_segment_t old_fs;
 567
 568                 if (second == IPC_SET) {
 569                         err = get_user(m.msg_perm.uid,
 570                                        &up->msg_perm.uid);
 571                         err |= __get_user(m.msg_perm.gid,
 572                                           &up->msg_perm.gid);
 573                         err |= __get_user(m.msg_perm.mode,
 574                                           &up->msg_perm.mode);
 575                         err |= __get_user(m.msg_qbytes,
 576                                           &up->msg_qbytes);
 577                         if (err)
 578                                 goto out;
 579                 }
 580                 old_fs = get_fs ();
 581                 set_fs (KERNEL_DS);
 582                 err = sys_msgctl(first, second,
 583                                  (struct msqid_ds __user *) &m);
 584                 set_fs (old_fs);
 585                 if (IPCOP_MASK (second) &
 586                     (IPCOP_MASK (MSG_STAT) | IPCOP_MASK (IPC_STAT))) {
 587                         int err2 = put_user(m.msg_perm.key,
 588                                             &up->msg_perm.key);
 589                         err2 |= __put_user(high2lowuid(m.msg_perm.uid),
 590                                            &up->msg_perm.uid);
 591                         err2 |= __put_user(high2lowgid(m.msg_perm.gid),
 592                                            &up->msg_perm.gid);
 593                         err2 |= __put_user(high2lowuid(m.msg_perm.cuid),
 594                                            &up->msg_perm.cuid);
 595                         err2 |= __put_user(high2lowgid(m.msg_perm.cgid),
 596                                            &up->msg_perm.cgid);
 597                         err2 |= __put_user(m.msg_perm.mode,
 598                                            &up->msg_perm.mode);
 599                         err2 |= __put_user(m.msg_perm.seq,
 600                                            &up->msg_perm.seq);
 601                         err2 |= __put_user(m.msg_stime, &up->msg_stime);
 602                         err2 |= __put_user(m.msg_rtime, &up->msg_rtime);
 603                         err2 |= __put_user(m.msg_ctime, &up->msg_ctime);
 604                         err2 |= __put_user(m.msg_cbytes,
 605                                            &up->msg_cbytes);
 606                         err2 |= __put_user(m.msg_qnum, &up->msg_qnum);
 607                         err2 |= __put_user(m.msg_qbytes,
 608                                            &up->msg_qbytes);
 609                         err2 |= __put_user(m.msg_lspid, &up->msg_lspid);
 610                         err2 |= __put_user(m.msg_lrpid, &up->msg_lrpid);
 611                         if (err2)
 612                                 err = -EFAULT;
 613                 }
 614         }
 615
 616 out:
 617         return err;
 618 }
 619
 620 static int do_sys32_shmat (int first, int second, int third, int version, void __user *uptr)
 621 {
 622         unsigned long raddr;
 623         u32 __user *uaddr = compat_ptr((compat_uptr_t)third);
 624         int err = -EINVAL;
 625
 626         if (version == 1)
 627                 goto out;
 628         err = do_shmat (first, uptr, second, &raddr);
 629         if (err)
 630                 goto out;
 631         err = put_user (raddr, uaddr);
 632 out:
 633         return err;
 634 }
 635
 636 static int do_sys32_shmctl(int first, int second, void __user *uptr)
 637 {
 638         int err;
 639
 640         if (IPCOP_MASK (second) &
 641             (IPCOP_MASK (IPC_INFO) | IPCOP_MASK (SHM_LOCK) |
 642              IPCOP_MASK (SHM_UNLOCK) | IPCOP_MASK (IPC_RMID))) {
 643                 if (second == (IPC_INFO|IPC_64)) {
 644                         /* So that we don't have to translate it */
 645                         second = IPC_INFO;
 646                 }
 647                 err = sys_shmctl(first, second, uptr);
 648         } else if ((second & IPC_64) && second != (SHM_INFO|IPC_64)) {
 649                 struct shmid64_ds s;
 650                 struct shmid64_ds32 __user *up = uptr;
 651                 mm_segment_t old_fs;
 652
 653                 if (second == (IPC_SET|IPC_64)) {
 654                         err = get_user(s.shm_perm.uid,
 655                                        &up->shm_perm.uid);
 656                         err |= __get_user(s.shm_perm.gid,
 657                                           &up->shm_perm.gid);
 658                         err |= __get_user(s.shm_perm.mode,
 659                                           &up->shm_perm.mode);
 660                         if (err)
 661                                 goto out;
 662                 }
 663                 old_fs = get_fs();
 664                 set_fs(KERNEL_DS);
 665                 err = sys_shmctl(first, second,
 666                                  (struct shmid_ds __user *)&s);
 667                 set_fs(old_fs);
 668                 if (err < 0)
 669                         goto out;
 670
 671                 /* Mask it even in this case so it becomes a CSE. */
 672                 if (IPCOP_MASK (second) &
 673                     (IPCOP_MASK (SHM_STAT) | IPCOP_MASK (IPC_STAT))) {
 674                         int err2 = copy_to_user(&up->shm_perm,
 675                                                 &s.shm_perm,
 676                                                 sizeof(struct ipc64_perm) + 3*sizeof(time_t));
 677                         err2 |= __put_user(s.shm_segsz, &up->shm_segsz);
 678                         err2 |= __put_user(s.shm_nattch,&up->shm_nattch);
 679                         err2 |= __put_user(s.shm_cpid, &up->shm_cpid);
 680                         err2 |= __put_user(s.shm_lpid, &up->shm_lpid);
 681                         if (err2)
 682                                 err = -EFAULT;
 683                 }
 684         } else {
 685                 struct shmid_ds s;
 686                 struct shmid_ds32 __user *up = uptr;
 687                 mm_segment_t old_fs;
 688
 689                 second &= ~IPC_64;
 690                 if (second == IPC_SET) {
 691                         err = get_user(s.shm_perm.uid,
 692                                        &up->shm_perm.uid);
 693                         err |= __get_user(s.shm_perm.gid,
 694                                           &up->shm_perm.gid);
 695                         err |= __get_user(s.shm_perm.mode,
 696                                           &up->shm_perm.mode);
 697                         if (err)
 698                                 goto out;
 699                 }
 700                 old_fs = get_fs();
 701                 set_fs(KERNEL_DS);
 702                 err = sys_shmctl(first, second,
 703                                  (struct shmid_ds __user *) &s);
 704                 set_fs(old_fs);
 705                 if (err < 0)
 706                         goto out;
 707
 708                 /* Mask it even in this case so it becomes a CSE. */
 709                 if (second == SHM_INFO) {
 710                         struct shm_info32 {
 711                                 int used_ids;
 712                                 u32 shm_tot, shm_rss, shm_swp;
 713                                 u32 swap_attempts, swap_successes;
 714                         };
 715                         struct shm_info32 __user *uip = uptr;
 716                         struct shm_info *kp = (struct shm_info *) &s;
 717                         int err2 = put_user(kp->used_ids,
 718                                             &uip->used_ids);
 719                         err2 |= __put_user(kp->shm_tot, &uip->shm_tot);
 720                         err2 |= __put_user(kp->shm_rss, &uip->shm_rss);
 721                         err2 |= __put_user(kp->shm_swp, &uip->shm_swp);
 722                         err2 |= __put_user(kp->swap_attempts,
 723                                            &uip->swap_attempts);
 724                         err2 |= __put_user(kp->swap_successes,
 725                                            &uip->swap_successes);
 726                         if (err2)
 727                                 err = -EFAULT;
 728                 } else if (IPCOP_MASK (second) &
 729                            (IPCOP_MASK (SHM_STAT) |
 730                             IPCOP_MASK (IPC_STAT))) {
 731                         int err2;
 732
 733                         err2  = put_user(s.shm_perm.key,
 734                                          &up->shm_perm.key);
 735                         err2 |= __put_user(high2lowuid(s.shm_perm.uid),
 736                                            &up->shm_perm.uid);
 737                         err2 |= __put_user(high2lowuid(s.shm_perm.gid),
 738                                            &up->shm_perm.gid);
 739                         err2 |= __put_user(high2lowuid(s.shm_perm.cuid),
 740                                            &up->shm_perm.cuid);
 741                         err2 |= __put_user(high2lowuid(s.shm_perm.cgid),
 742                                            &up->shm_perm.cgid);
 743                         err2 |= __put_user(s.shm_perm.mode,
 744                                            &up->shm_perm.mode);
 745                         err2 |= __put_user(s.shm_perm.seq,
 746                                            &up->shm_perm.seq);
 747                         err2 |= __put_user(s.shm_atime, &up->shm_atime);
 748                         err2 |= __put_user(s.shm_dtime, &up->shm_dtime);
 749                         err2 |= __put_user(s.shm_ctime, &up->shm_ctime);
 750                         err2 |= __put_user(s.shm_segsz, &up->shm_segsz);
 751                         err2 |= __put_user(s.shm_nattch,&up->shm_nattch);
 752                         err2 |= __put_user(s.shm_cpid, &up->shm_cpid);
 753                         err2 |= __put_user(s.shm_lpid, &up->shm_lpid);
 754                         if (err2)
 755                                 err = -EFAULT;
 756                 }
 757         }
 758 out:
 759         return err;
 760 }
 761
 762 static int sys32_semtimedop(int semid, struct sembuf __user *tsems,
 763                 int nsems,
 764                 const struct compat_timespec __user *timeout32)
 765 {
 766         struct compat_timespec t32;
 767         struct timespec __user *t64;
 768
 769         t64 = compat_alloc_user_space(sizeof(*t64));
 770         if (copy_from_user(&t32, timeout32, sizeof(t32)))
 771                 return -EFAULT;
 772
 773         if (put_user(t32.tv_sec, &t64->tv_sec) ||
 774             put_user(t32.tv_nsec, &t64->tv_nsec))
 775                 return -EFAULT;
 776
 777         return sys_semtimedop(semid, tsems, nsems, t64);
 778 }
 779
 780 asmlinkage long compat_sys_ipc(u32 call, int first, int second, int third, compat_uptr_t __ptr, u32 fifth)
 781 {
 782         int version, err;
 783         void __user *ptr = compat_ptr(__ptr);
 784
 785         version = call >> 16; /* hack for backward compatibility */
 786         call &= 0xffff;
 787
 788         if (call <= SEMCTL) {
 789                 switch (call) {
 790                 case SEMOP:
 791                         /* struct sembuf is the same on 32 and 64 :)) */
 792                         err = sys_semtimedop (first, ptr, second, NULL);
 793                         goto out;
 794                 case SEMTIMEDOP:
 795                         err = sys32_semtimedop(first, ptr, second,
 796                                                compat_ptr(fifth));
 797                 case SEMGET:
 798                         err = sys_semget(first, second, third);
 799                         goto out;
 800                 case SEMCTL:
 801                         err = do_sys32_semctl(first, second, third, ptr);
 802                         goto out;
 803                 default:
 804                         err = -ENOSYS;
 805                         goto out;
 806                 };
 807         }
 808         if (call <= MSGCTL) {
 809                 switch (call) {
 810                 case MSGSND:
 811                         err = do_sys32_msgsnd(first, second, third, ptr);
 812                         goto out;
 813                 case MSGRCV:
 814                         err = do_sys32_msgrcv(first, second, fifth,
 815                                               third, version, ptr);
 816                         goto out;
 817                 case MSGGET:
 818                         err = sys_msgget((key_t) first, second);
 819                         goto out;
 820                 case MSGCTL:
 821                         err = do_sys32_msgctl(first, second, ptr);
 822                         goto out;
 823                 default:
 824                         err = -ENOSYS;
 825                         goto out;
 826                 };
 827         }
 828         if (call <= SHMCTL) {
 829                 switch (call) {
 830                 case SHMAT:
 831                         err = do_sys32_shmat(first, second, third,
 832                                              version, ptr);
 833                         goto out;
 834                 case SHMDT:
 835                         err = sys_shmdt(ptr);
 836                         goto out;
 837                 case SHMGET:
 838                         err = sys_shmget(first, second, third);
 839                         goto out;
 840                 case SHMCTL:
 841                         err = do_sys32_shmctl(first, second, ptr);
 842                         goto out;
 843                 default:
 844                         err = -ENOSYS;
 845                         goto out;
 846                 };
 847         }
 848         err = -ENOSYS;
 849
 850 out:
 851         return err;
 852 }
 853
 854 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
 855 {
 856         if ((int)high < 0)
 857                 return -EINVAL;
 858         else
 859                 return sys_truncate(path, (high << 32) | low);
 860 }
 861
 862 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
 863 {
 864         if ((int)high < 0)
 865                 return -EINVAL;
 866         else
 867                 return sys_ftruncate(fd, (high << 32) | low);
 868 }
 869
 870 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 871 {
 872         int err;
 873
 874         if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
 875             !old_valid_dev(stat->rdev))
 876                 return -EOVERFLOW;
 877
 878         err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
 879         err |= put_user(stat->ino, &statbuf->st_ino);
 880         err |= put_user(stat->mode, &statbuf->st_mode);
 881         err |= put_user(stat->nlink, &statbuf->st_nlink);
 882         err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
 883         err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
 884         err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
 885         err |= put_user(stat->size, &statbuf->st_size);
 886         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
 887         err |= put_user(0, &statbuf->__unused1);
 888         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 889         err |= put_user(0, &statbuf->__unused2);
 890         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 891         err |= put_user(0, &statbuf->__unused3);
 892         err |= put_user(stat->blksize, &statbuf->st_blksize);
 893         err |= put_user(stat->blocks, &statbuf->st_blocks);
 894         err |= put_user(0, &statbuf->__unused4[0]);
 895         err |= put_user(0, &statbuf->__unused4[1]);
 896
 897         return err;
 898 }
 899
 900 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
 901 {
 902         return sys_sysfs(option, arg1, arg2);
 903 }
 904
 905 struct sysinfo32 {
 906         s32 uptime;
 907         u32 loads[3];
 908         u32 totalram;
 909         u32 freeram;
 910         u32 sharedram;
 911         u32 bufferram;
 912         u32 totalswap;
 913         u32 freeswap;
 914         unsigned short procs;
 915         unsigned short pad;
 916         u32 totalhigh;
 917         u32 freehigh;
 918         u32 mem_unit;
 919         char _f[20-2*sizeof(int)-sizeof(int)];
 920 };
 921
 922 asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
 923 {
 924         struct sysinfo s;
 925         int ret, err;
 926         int bitcount = 0;
 927         mm_segment_t old_fs = get_fs ();
 928
 929         set_fs(KERNEL_DS);
 930         ret = sys_sysinfo((struct sysinfo __user *) &s);
 931         set_fs(old_fs);
 932         /* Check to see if any memory value is too large for 32-bit and
 933          * scale down if needed.
 934          */
 935         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 936                 while (s.mem_unit < PAGE_SIZE) {
 937                         s.mem_unit <<= 1;
 938                         bitcount++;
 939                 }
 940                 s.totalram >>= bitcount;
 941                 s.freeram >>= bitcount;
 942                 s.sharedram >>= bitcount;
 943                 s.bufferram >>= bitcount;
 944                 s.totalswap >>= bitcount;
 945                 s.freeswap >>= bitcount;
 946                 s.totalhigh >>= bitcount;
 947                 s.freehigh >>= bitcount;
 948         }
 949
 950         err = put_user (s.uptime, &info->uptime);
 951         err |= __put_user (s.loads[0], &info->loads[0]);
 952         err |= __put_user (s.loads[1], &info->loads[1]);
 953         err |= __put_user (s.loads[2], &info->loads[2]);
 954         err |= __put_user (s.totalram, &info->totalram);
 955         err |= __put_user (s.freeram, &info->freeram);
 956         err |= __put_user (s.sharedram, &info->sharedram);
 957         err |= __put_user (s.bufferram, &info->bufferram);
 958         err |= __put_user (s.totalswap, &info->totalswap);
 959         err |= __put_user (s.freeswap, &info->freeswap);
 960         err |= __put_user (s.procs, &info->procs);
 961         err |= __put_user (s.totalhigh, &info->totalhigh);
 962         err |= __put_user (s.freehigh, &info->freehigh);
 963         err |= __put_user (s.mem_unit, &info->mem_unit);
 964         if (err)
 965                 return -EFAULT;
 966         return ret;
 967 }
 968
 969 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 970 {
 971         struct timespec t;
 972         int ret;
 973         mm_segment_t old_fs = get_fs ();
 974
 975         set_fs (KERNEL_DS);
 976         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
 977         set_fs (old_fs);
 978         if (put_compat_timespec(&t, interval))
 979                 return -EFAULT;
 980         return ret;
 981 }
 982
 983 asmlinkage long compat_sys_rt_sigprocmask(int how,
 984                                           compat_sigset_t __user *set,
 985                                           compat_sigset_t __user *oset,
 986                                           compat_size_t sigsetsize)
 987 {
 988         sigset_t s;
 989         compat_sigset_t s32;
 990         int ret;
 991         mm_segment_t old_fs = get_fs();
 992
 993         if (set) {
 994                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 995                         return -EFAULT;
 996                 switch (_NSIG_WORDS) {
 997                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 998                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 999                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
1000                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
1001                 }
1002         }
1003         set_fs (KERNEL_DS);
1004         ret = sys_rt_sigprocmask(how,
1005                                  set ? (sigset_t __user *) &s : NULL,
1006                                  oset ? (sigset_t __user *) &s : NULL,
1007                                  sigsetsize);
1008         set_fs (old_fs);
1009         if (ret) return ret;
1010         if (oset) {
1011                 switch (_NSIG_WORDS) {
1012                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
1013                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
1014                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
1015                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
1016                 }
1017                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
1018                         return -EFAULT;
1019         }
1020         return 0;
1021 }
1022
1023 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
1024                                     compat_size_t sigsetsize)
1025 {
1026         sigset_t s;
1027         compat_sigset_t s32;
1028         int ret;
1029         mm_segment_t old_fs = get_fs();
1030
1031         set_fs (KERNEL_DS);
1032         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
1033         set_fs (old_fs);
1034         if (!ret) {
1035                 switch (_NSIG_WORDS) {
1036                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
1037                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
1038                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
1039                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
1040                 }
1041                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
1042                         return -EFAULT;
1043         }
1044         return ret;
1045 }
1046
1047 asmlinkage long sys32_rt_sigtimedwait(compat_sigset_t __user *uthese,
1048                                       siginfo_t32 __user *uinfo,
1049                                       struct compat_timespec __user *uts,
1050                                       compat_size_t sigsetsize)
1051 {
1052         int ret, sig;
1053         sigset_t these;
1054         compat_sigset_t these32;
1055         struct timespec ts;
1056         siginfo_t info;
1057         long timeout = 0;
1058
1059         /* XXX: Don't preclude handling different sized sigset_t's.  */
1060         if (sigsetsize != sizeof(sigset_t))
1061                 return -EINVAL;
1062
1063         if (copy_from_user (&these32, uthese, sizeof(compat_sigset_t)))
1064                 return -EFAULT;
1065
1066         switch (_NSIG_WORDS) {
1067         case 4: these.sig[3] = these32.sig[6] | (((long)these32.sig[7]) << 32);
1068         case 3: these.sig[2] = these32.sig[4] | (((long)these32.sig[5]) << 32);
1069         case 2: these.sig[1] = these32.sig[2] | (((long)these32.sig[3]) << 32);
1070         case 1: these.sig[0] = these32.sig[0] | (((long)these32.sig[1]) << 32);
1071         }
1072
1073         /*
1074          * Invert the set of allowed signals to get those we
1075          * want to block.
1076          */
1077         sigdelsetmask(&these, sigmask(SIGKILL)|sigmask(SIGSTOP));
1078         signotset(&these);
1079
1080         if (uts) {
1081                 if (get_compat_timespec(&ts, uts))
1082                         return -EINVAL;
1083                 if (ts.tv_nsec >= 1000000000L || ts.tv_nsec < 0
1084                     || ts.tv_sec < 0)
1085                         return -EINVAL;
1086         }
1087
1088         spin_lock_irq(&current->sighand->siglock);
1089         sig = dequeue_signal(current, &these, &info);
1090         if (!sig) {
1091                 timeout = MAX_SCHEDULE_TIMEOUT;
1092                 if (uts)
1093                         timeout = (timespec_to_jiffies(&ts)
1094                                    + (ts.tv_sec || ts.tv_nsec));
1095
1096                 if (timeout) {
1097                         /* None ready -- temporarily unblock those we're
1098                          * interested while we are sleeping in so that we'll
1099                          * be awakened when they arrive.  */
1100                         current->real_blocked = current->blocked;
1101                         sigandsets(&current->blocked, &current->blocked, &these);
1102                         recalc_sigpending();
1103                         spin_unlock_irq(&current->sighand->siglock);
1104
1105                         current->state = TASK_INTERRUPTIBLE;
1106                         timeout = schedule_timeout(timeout);
1107
1108                         spin_lock_irq(&current->sighand->siglock);
1109                         sig = dequeue_signal(current, &these, &info);
1110                         current->blocked = current->real_blocked;
1111                         siginitset(&current->real_blocked, 0);
1112                         recalc_sigpending();
1113                 }
1114         }
1115         spin_unlock_irq(&current->sighand->siglock);
1116
1117         if (sig) {
1118                 ret = sig;
1119                 if (uinfo) {
1120                         if (copy_siginfo_to_user32(uinfo, &info))
1121                                 ret = -EFAULT;
1122                 }
1123         } else {
1124                 ret = -EAGAIN;
1125                 if (timeout)
1126                         ret = -EINTR;
1127         }
1128
1129         return ret;
1130 }
1131
1132 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
1133                                            siginfo_t32 __user *uinfo)
1134 {
1135         siginfo_t info;
1136         int ret;
1137         mm_segment_t old_fs = get_fs();
1138
1139         if (copy_from_user (&info, uinfo, 3*sizeof(int)) ||
1140             copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
1141                 return -EFAULT;
1142         set_fs (KERNEL_DS);
1143         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
1144         set_fs (old_fs);
1145         return ret;
1146 }
1147
1148 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
1149                                      struct old_sigaction32 __user *oact)
1150 {
1151         struct k_sigaction new_ka, old_ka;
1152         int ret;
1153
1154         if (sig < 0) {
1155                 set_thread_flag(TIF_NEWSIGNALS);
1156                 sig = -sig;
1157         }
1158
1159         if (act) {
1160                 compat_old_sigset_t mask;
1161                 u32 u_handler, u_restorer;
1162
1163                 ret = get_user(u_handler, &act->sa_handler);
1164                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
1165                 ret |= __get_user(u_restorer, &act->sa_restorer);
1166                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
1167                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
1168                 ret |= __get_user(mask, &act->sa_mask);
1169                 if (ret)
1170                         return ret;
1171                 new_ka.ka_restorer = NULL;
1172                 siginitset(&new_ka.sa.sa_mask, mask);
1173         }
1174
1175         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
1176
1177         if (!ret && oact) {
1178                 ret = put_user((long)old_ka.sa.sa_handler, &oact->sa_handler);
1179                 ret |= __put_user((long)old_ka.sa.sa_restorer, &oact->sa_restorer);
1180                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
1181                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
1182         }
1183
1184         return ret;
1185 }
1186
1187 asmlinkage long compat_sys_rt_sigaction(int sig,
1188                                         struct sigaction32 __user *act,
1189                                         struct sigaction32 __user *oact,
1190                                         void __user *restorer,
1191                                         compat_size_t sigsetsize)
1192 {
1193         struct k_sigaction new_ka, old_ka;
1194         int ret;
1195         compat_sigset_t set32;
1196
1197         /* XXX: Don't preclude handling different sized sigset_t's.  */
1198         if (sigsetsize != sizeof(compat_sigset_t))
1199                 return -EINVAL;
1200
1201         /* All tasks which use RT signals (effectively) use
1202          * new style signals.
1203          */
1204         set_thread_flag(TIF_NEWSIGNALS);
1205
1206         if (act) {
1207                 u32 u_handler, u_restorer;
1208
1209                 new_ka.ka_restorer = restorer;
1210                 ret = get_user(u_handler, &act->sa_handler);
1211                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
1212                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
1213                 switch (_NSIG_WORDS) {
1214                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
1215                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
1216                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
1217                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
1218                 }
1219                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
1220                 ret |= __get_user(u_restorer, &act->sa_restorer);
1221                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
1222                 if (ret)
1223                         return -EFAULT;
1224         }
1225
1226         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
1227
1228         if (!ret && oact) {
1229                 switch (_NSIG_WORDS) {
1230                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
1231                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
1232                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
1233                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
1234                 }
1235                 ret = put_user((long)old_ka.sa.sa_handler, &oact->sa_handler);
1236                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
1237                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
1238                 ret |= __put_user((long)old_ka.sa.sa_restorer, &oact->sa_restorer);
1239                 if (ret)
1240                         ret = -EFAULT;
1241         }
1242
1243         return ret;
1244 }
1245
1246 /*
1247  * sparc32_execve() executes a new program after the asm stub has set
1248  * things up for us.  This should basically do what I want it to.
1249  */
1250 asmlinkage long sparc32_execve(struct pt_regs *regs)
1251 {
1252         int error, base = 0;
1253         char *filename;
1254
1255         /* User register window flush is done by entry.S */
1256
1257         /* Check for indirect call. */
1258         if ((u32)regs->u_regs[UREG_G1] == 0)
1259                 base = 1;
1260
1261         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
1262         error = PTR_ERR(filename);
1263         if (IS_ERR(filename))
1264                 goto out;
1265
1266         error = compat_do_execve(filename,
1267                                  compat_ptr(regs->u_regs[base + UREG_I1]),
1268                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
1269
1270         putname(filename);
1271
1272         if (!error) {
1273                 fprs_write(0);
1274                 current_thread_info()->xfsr[0] = 0;
1275                 current_thread_info()->fpsaved[0] = 0;
1276                 regs->tstate &= ~TSTATE_PEF;
1277                 current->ptrace &= ~PT_DTRACE;
1278         }
1279 out:
1280         return error;
1281 }
1282
1283 #ifdef CONFIG_MODULES
1284
1285 asmlinkage long sys32_init_module(void __user *umod, u32 len,
1286                                   const char __user *uargs)
1287 {
1288         return sys_init_module(umod, len, uargs);
1289 }
1290
1291 asmlinkage long sys32_delete_module(const char __user *name_user,
1292                                     unsigned int flags)
1293 {
1294         return sys_delete_module(name_user, flags);
1295 }
1296
1297 #else /* CONFIG_MODULES */
1298
1299 asmlinkage long sys32_init_module(const char __user *name_user,
1300                                   struct module __user *mod_user)
1301 {
1302         return -ENOSYS;
1303 }
1304
1305 asmlinkage long sys32_delete_module(const char __user *name_user)
1306 {
1307         return -ENOSYS;
1308 }
1309
1310 #endif  /* CONFIG_MODULES */
1311
1312 /* Translations due to time_t size differences.  Which affects all
1313    sorts of things, like timeval and itimerval.  */
1314
1315 extern struct timezone sys_tz;
1316
1317 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
1318                                    struct timezone __user *tz)
1319 {
1320         if (tv) {
1321                 struct timeval ktv;
1322                 do_gettimeofday(&ktv);
1323                 if (put_tv32(tv, &ktv))
1324                         return -EFAULT;
1325         }
1326         if (tz) {
1327                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1328                         return -EFAULT;
1329         }
1330         return 0;
1331 }
1332
1333 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
1334 {
1335         long usec;
1336
1337         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
1338                 return -EFAULT;
1339         if (__get_user(o->tv_sec, &i->tv_sec))
1340                 return -EFAULT;
1341         if (__get_user(usec, &i->tv_usec))
1342                 return -EFAULT;
1343         o->tv_nsec = usec * 1000;
1344         return 0;
1345 }
1346
1347 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
1348                                    struct timezone __user *tz)
1349 {
1350         struct timespec kts;
1351         struct timezone ktz;
1352
1353         if (tv) {
1354                 if (get_ts32(&kts, tv))
1355                         return -EFAULT;
1356         }
1357         if (tz) {
1358                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
1359                         return -EFAULT;
1360         }
1361
1362         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1363 }
1364
1365 asmlinkage long sys32_utimes(char __user *filename,
1366                              struct compat_timeval __user *tvs)
1367 {
1368         struct timeval ktvs[2];
1369
1370         if (tvs) {
1371                 if (get_tv32(&ktvs[0], tvs) ||
1372                     get_tv32(&ktvs[1], 1+tvs))
1373                         return -EFAULT;
1374         }
1375
1376         return do_utimes(filename, (tvs ? &ktvs[0] : NULL));
1377 }
1378
1379 /* These are here just in case some old sparc32 binary calls it. */
1380 asmlinkage long sys32_pause(void)
1381 {
1382         current->state = TASK_INTERRUPTIBLE;
1383         schedule();
1384         return -ERESTARTNOHAND;
1385 }
1386
1387 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
1388                                         char __user *ubuf,
1389                                         compat_size_t count,
1390                                         unsigned long poshi,
1391                                         unsigned long poslo)
1392 {
1393         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
1394 }
1395
1396 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
1397                                          char __user *ubuf,
1398                                          compat_size_t count,
1399                                          unsigned long poshi,
1400                                          unsigned long poslo)
1401 {
1402         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
1403 }
1404
1405 asmlinkage long compat_sys_readahead(int fd,
1406                                      unsigned long offhi,
1407                                      unsigned long offlo,
1408                                      compat_size_t count)
1409 {
1410         return sys_readahead(fd, (offhi << 32) | offlo, count);
1411 }
1412
1413 long compat_sys_fadvise64(int fd,
1414                           unsigned long offhi,
1415                           unsigned long offlo,
1416                           compat_size_t len, int advice)
1417 {
1418         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
1419 }
1420
1421 long compat_sys_fadvise64_64(int fd,
1422                              unsigned long offhi, unsigned long offlo,
1423                              unsigned long lenhi, unsigned long lenlo,
1424                              int advice)
1425 {
1426         return sys_fadvise64_64(fd,
1427                                 (offhi << 32) | offlo,
1428                                 (lenhi << 32) | lenlo,
1429                                 advice);
1430 }
1431
1432 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
1433                                     compat_off_t __user *offset,
1434                                     compat_size_t count)
1435 {
1436         mm_segment_t old_fs = get_fs();
1437         int ret;
1438         off_t of;
1439
1440         if (offset && get_user(of, offset))
1441                 return -EFAULT;
1442
1443         set_fs(KERNEL_DS);
1444         ret = sys_sendfile(out_fd, in_fd,
1445                            offset ? (off_t __user *) &of : NULL,
1446                            count);
1447         set_fs(old_fs);
1448
1449         if (offset && put_user(of, offset))
1450                 return -EFAULT;
1451
1452         return ret;
1453 }
1454
1455 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
1456                                       compat_loff_t __user *offset,
1457                                       compat_size_t count)
1458 {
1459         mm_segment_t old_fs = get_fs();
1460         int ret;
1461         loff_t lof;
1462
1463         if (offset && get_user(lof, offset))
1464                 return -EFAULT;
1465
1466         set_fs(KERNEL_DS);
1467         ret = sys_sendfile64(out_fd, in_fd,
1468                              offset ? (loff_t __user *) &lof : NULL,
1469                              count);
1470         set_fs(old_fs);
1471
1472         if (offset && put_user(lof, offset))
1473                 return -EFAULT;
1474
1475         return ret;
1476 }
1477
1478 /* Handle adjtimex compatibility. */
1479
1480 struct timex32 {
1481         u32 modes;
1482         s32 offset, freq, maxerror, esterror;
1483         s32 status, constant, precision, tolerance;
1484         struct compat_timeval time;
1485         s32 tick;
1486         s32 ppsfreq, jitter, shift, stabil;
1487         s32 jitcnt, calcnt, errcnt, stbcnt;
1488         s32  :32; s32  :32; s32  :32; s32  :32;
1489         s32  :32; s32  :32; s32  :32; s32  :32;
1490         s32  :32; s32  :32; s32  :32; s32  :32;
1491 };
1492
1493 extern int do_adjtimex(struct timex *);
1494
1495 asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
1496 {
1497         struct timex txc;
1498         int ret;
1499
1500         memset(&txc, 0, sizeof(struct timex));
1501
1502         if (get_user(txc.modes, &utp->modes) ||
1503             __get_user(txc.offset, &utp->offset) ||
1504             __get_user(txc.freq, &utp->freq) ||
1505             __get_user(txc.maxerror, &utp->maxerror) ||
1506             __get_user(txc.esterror, &utp->esterror) ||
1507             __get_user(txc.status, &utp->status) ||
1508             __get_user(txc.constant, &utp->constant) ||
1509             __get_user(txc.precision, &utp->precision) ||
1510             __get_user(txc.tolerance, &utp->tolerance) ||
1511             __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
1512             __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
1513             __get_user(txc.tick, &utp->tick) ||
1514             __get_user(txc.ppsfreq, &utp->ppsfreq) ||
1515             __get_user(txc.jitter, &utp->jitter) ||
1516             __get_user(txc.shift, &utp->shift) ||
1517             __get_user(txc.stabil, &utp->stabil) ||
1518             __get_user(txc.jitcnt, &utp->jitcnt) ||
1519             __get_user(txc.calcnt, &utp->calcnt) ||
1520             __get_user(txc.errcnt, &utp->errcnt) ||
1521             __get_user(txc.stbcnt, &utp->stbcnt))
1522                 return -EFAULT;
1523
1524         ret = do_adjtimex(&txc);
1525
1526         if (put_user(txc.modes, &utp->modes) ||
1527             __put_user(txc.offset, &utp->offset) ||
1528             __put_user(txc.freq, &utp->freq) ||
1529             __put_user(txc.maxerror, &utp->maxerror) ||
1530             __put_user(txc.esterror, &utp->esterror) ||
1531             __put_user(txc.status, &utp->status) ||
1532             __put_user(txc.constant, &utp->constant) ||
1533             __put_user(txc.precision, &utp->precision) ||
1534             __put_user(txc.tolerance, &utp->tolerance) ||
1535             __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
1536             __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
1537             __put_user(txc.tick, &utp->tick) ||
1538             __put_user(txc.ppsfreq, &utp->ppsfreq) ||
1539             __put_user(txc.jitter, &utp->jitter) ||
1540             __put_user(txc.shift, &utp->shift) ||
1541             __put_user(txc.stabil, &utp->stabil) ||
1542             __put_user(txc.jitcnt, &utp->jitcnt) ||
1543             __put_user(txc.calcnt, &utp->calcnt) ||
1544             __put_user(txc.errcnt, &utp->errcnt) ||
1545             __put_user(txc.stbcnt, &utp->stbcnt))
1546                 ret = -EFAULT;
1547
1548         return ret;
1549 }
1550
1551 /* This is just a version for 32-bit applications which does
1552  * not force O_LARGEFILE on.
1553  */
1554
1555 asmlinkage long sparc32_open(const char __user *filename,
1556                              int flags, int mode)
1557 {
1558         char * tmp;
1559         int fd, error;
1560
1561         tmp = getname(filename);
1562         fd = PTR_ERR(tmp);
1563         if (!IS_ERR(tmp)) {
1564                 fd = get_unused_fd();
1565                 if (fd >= 0) {
1566                         struct file * f = filp_open(tmp, flags, mode);
1567                         error = PTR_ERR(f);
1568                         if (IS_ERR(f))
1569                                 goto out_error;
1570                         fd_install(fd, f);
1571                 }
1572 out:
1573                 putname(tmp);
1574         }
1575         return fd;
1576
1577 out_error:
1578         put_unused_fd(fd);
1579         fd = error;
1580         goto out;
1581 }
1582
1583 extern unsigned long do_mremap(unsigned long addr,
1584         unsigned long old_len, unsigned long new_len,
1585         unsigned long flags, unsigned long new_addr);
1586
1587 asmlinkage unsigned long sys32_mremap(unsigned long addr,
1588         unsigned long old_len, unsigned long new_len,
1589         unsigned long flags, u32 __new_addr)
1590 {
1591         struct vm_area_struct *vma;
1592         unsigned long ret = -EINVAL;
1593         unsigned long new_addr = __new_addr;
1594
1595         if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
1596                 goto out;
1597         if (addr > 0xf0000000UL - old_len)
1598                 goto out;
1599         down_write(&current->mm->mmap_sem);
1600         if (flags & MREMAP_FIXED) {
1601                 if (new_addr > 0xf0000000UL - new_len)
1602                         goto out_sem;
1603         } else if (addr > 0xf0000000UL - new_len) {
1604                 unsigned long map_flags = 0;
1605                 struct file *file = NULL;
1606
1607                 ret = -ENOMEM;
1608                 if (!(flags & MREMAP_MAYMOVE))
1609                         goto out_sem;
1610
1611                 vma = find_vma(current->mm, addr);
1612                 if (vma) {
1613                         if (vma->vm_flags & VM_SHARED)
1614                                 map_flags |= MAP_SHARED;
1615                         file = vma->vm_file;
1616                 }
1617
1618                 /* MREMAP_FIXED checked above. */
1619                 new_addr = get_unmapped_area(file, addr, new_len,
1620                                     vma ? vma->vm_pgoff : 0,
1621                                     map_flags);
1622                 ret = new_addr;
1623                 if (new_addr & ~PAGE_MASK)
1624                         goto out_sem;
1625                 flags |= MREMAP_FIXED;
1626         }
1627         ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1628 out_sem:
1629         up_write(&current->mm->mmap_sem);
1630 out:
1631         return ret;
1632 }
1633
1634 struct __sysctl_args32 {
1635         u32 name;
1636         int nlen;
1637         u32 oldval;
1638         u32 oldlenp;
1639         u32 newval;
1640         u32 newlen;
1641         u32 __unused[4];
1642 };
1643
1644 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1645 {
1646 #ifndef CONFIG_SYSCTL
1647         return -ENOSYS;
1648 #else
1649         struct __sysctl_args32 tmp;
1650         int error;
1651         size_t oldlen, __user *oldlenp = NULL;
1652         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
1653
1654         if (copy_from_user(&tmp, args, sizeof(tmp)))
1655                 return -EFAULT;
1656
1657         if (tmp.oldval && tmp.oldlenp) {
1658                 /* Duh, this is ugly and might not work if sysctl_args
1659                    is in read-only memory, but do_sysctl does indirectly
1660                    a lot of uaccess in both directions and we'd have to
1661                    basically copy the whole sysctl.c here, and
1662                    glibc's __sysctl uses rw memory for the structure
1663                    anyway.  */
1664                 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
1665                     put_user(oldlen, (size_t __user *)addr))
1666                         return -EFAULT;
1667                 oldlenp = (size_t __user *)addr;
1668         }
1669
1670         lock_kernel();
1671         error = do_sysctl((int __user *)(unsigned long) tmp.name,
1672                           tmp.nlen,
1673                           (void __user *)(unsigned long) tmp.oldval,
1674                           oldlenp,
1675                           (void __user *)(unsigned long) tmp.newval,
1676                           tmp.newlen);
1677         unlock_kernel();
1678         if (oldlenp) {
1679                 if (!error) {
1680                         if (get_user(oldlen, (size_t __user *)addr) ||
1681                             put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1682                                 error = -EFAULT;
1683                 }
1684                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
1685         }
1686         return error;
1687 #endif
1688 }
1689
1690 long sys32_lookup_dcookie(unsigned long cookie_high,
1691                           unsigned long cookie_low,
1692                           char __user *buf, size_t len)
1693 {
1694         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1695                                   buf, len);
1696 }
1697
1698 extern asmlinkage long
1699 sys_timer_create(clockid_t which_clock,
1700                  struct sigevent __user *timer_event_spec,
1701                  timer_t __user *created_timer_id);
1702
1703 long
1704 sys32_timer_create(u32 clock, struct sigevent32 __user *se32,
1705                    timer_t __user *timer_id)
1706 {
1707         struct sigevent se;
1708         mm_segment_t oldfs;
1709         timer_t t;
1710         long err;
1711
1712         if (se32 == NULL)
1713                 return sys_timer_create(clock, NULL, timer_id);
1714
1715         memset(&se, 0, sizeof(struct sigevent));
1716         if (get_user(se.sigev_value.sival_int,  &se32->sigev_value.sival_int) ||
1717             __get_user(se.sigev_signo, &se32->sigev_signo) ||
1718             __get_user(se.sigev_notify, &se32->sigev_notify) ||
1719             __copy_from_user(&se._sigev_un._pad, &se32->_sigev_un._pad,
1720             sizeof(se._sigev_un._pad)))
1721                 return -EFAULT;
1722
1723         if (!access_ok(VERIFY_WRITE,timer_id,sizeof(timer_t)))
1724                 return -EFAULT;
1725
1726         oldfs = get_fs();
1727         set_fs(KERNEL_DS);
1728         err = sys_timer_create(clock,
1729                                (struct sigevent __user *) &se,
1730                                (timer_t __user *) &t);
1731         set_fs(oldfs);
1732
1733         if (!err)
1734                 err = __put_user (t, timer_id);
1735
1736         return err;
1737 }
1738