include/linux/compat.h

   1 #ifndef _LINUX_COMPAT_H
   2 #define _LINUX_COMPAT_H
   3 /*
   4  * These are the type definitions for the architecture specific
   5  * syscall compatibility layer.
   6  */
   7
   8 #ifdef CONFIG_COMPAT
   9
  10 #include <linux/stat.h>
  11 #include <linux/param.h>        /* for HZ */
  12 #include <linux/sem.h>
  13 #include <linux/socket.h>
  14 #include <linux/if.h>
  15 #include <linux/fs.h>
  16 #include <linux/aio_abi.h>      /* for aio_context_t */
  17 #include <linux/unistd.h>
  18
  19 #include <asm/compat.h>
  20 #include <asm/siginfo.h>
  21 #include <asm/signal.h>
  22
  23 #ifndef COMPAT_USE_64BIT_TIME
  24 #define COMPAT_USE_64BIT_TIME 0
  25 #endif
  26
  27 #ifndef __SC_DELOUSE
  28 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
  29 #endif
  30
  31 #define COMPAT_SYSCALL_DEFINE0(name) \
  32         asmlinkage long compat_sys_##name(void)
  33
  34 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
  35         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
  36 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
  37         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
  38 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
  39         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
  40 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
  41         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
  42 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
  43         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
  44 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
  45         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
  46
  47 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  48         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
  49                 __attribute__((alias(__stringify(compat_SyS##name))));  \
  50         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
  51         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
  52         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
  53         {                                                               \
  54                 return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
  55         }                                                               \
  56         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  57
  58 #ifndef compat_user_stack_pointer
  59 #define compat_user_stack_pointer() current_user_stack_pointer()
  60 #endif
  61 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  62 typedef struct compat_sigaltstack {
  63         compat_uptr_t                   ss_sp;
  64         int                             ss_flags;
  65         compat_size_t                   ss_size;
  66 } compat_stack_t;
  67 #endif
  68
  69 #define compat_jiffies_to_clock_t(x)    \
  70                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  71
  72 typedef __compat_uid32_t        compat_uid_t;
  73 typedef __compat_gid32_t        compat_gid_t;
  74
  75 typedef compat_ulong_t          compat_aio_context_t;
  76
  77 struct compat_sel_arg_struct;
  78 struct rusage;
  79
  80 struct compat_itimerspec {
  81         struct compat_timespec it_interval;
  82         struct compat_timespec it_value;
  83 };
  84
  85 struct compat_utimbuf {
  86         compat_time_t           actime;
  87         compat_time_t           modtime;
  88 };
  89
  90 struct compat_itimerval {
  91         struct compat_timeval   it_interval;
  92         struct compat_timeval   it_value;
  93 };
  94
  95 struct compat_tms {
  96         compat_clock_t          tms_utime;
  97         compat_clock_t          tms_stime;
  98         compat_clock_t          tms_cutime;
  99         compat_clock_t          tms_cstime;
 100 };
 101
 102 struct compat_timex {
 103         compat_uint_t modes;
 104         compat_long_t offset;
 105         compat_long_t freq;
 106         compat_long_t maxerror;
 107         compat_long_t esterror;
 108         compat_int_t status;
 109         compat_long_t constant;
 110         compat_long_t precision;
 111         compat_long_t tolerance;
 112         struct compat_timeval time;
 113         compat_long_t tick;
 114         compat_long_t ppsfreq;
 115         compat_long_t jitter;
 116         compat_int_t shift;
 117         compat_long_t stabil;
 118         compat_long_t jitcnt;
 119         compat_long_t calcnt;
 120         compat_long_t errcnt;
 121         compat_long_t stbcnt;
 122         compat_int_t tai;
 123
 124         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 125         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 126         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 127 };
 128
 129 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 130
 131 typedef struct {
 132         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 133 } compat_sigset_t;
 134
 135 struct compat_sigaction {
 136 #ifndef __ARCH_HAS_IRIX_SIGACTION
 137         compat_uptr_t                   sa_handler;
 138         compat_ulong_t                  sa_flags;
 139 #else
 140         compat_uint_t                   sa_flags;
 141         compat_uptr_t                   sa_handler;
 142 #endif
 143 #ifdef __ARCH_HAS_SA_RESTORER
 144         compat_uptr_t                   sa_restorer;
 145 #endif
 146         compat_sigset_t                 sa_mask __packed;
 147 };
 148
 149 /*
 150  * These functions operate on 32- or 64-bit specs depending on
 151  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
 152  */
 153 extern int compat_get_timespec(struct timespec *, const void __user *);
 154 extern int compat_put_timespec(const struct timespec *, void __user *);
 155 extern int compat_get_timeval(struct timeval *, const void __user *);
 156 extern int compat_put_timeval(const struct timeval *, void __user *);
 157
 158 /*
 159  * This function convert a timespec if necessary and returns a *user
 160  * space* pointer.  If no conversion is necessary, it returns the
 161  * initial pointer.  NULL is a legitimate argument and will always
 162  * output NULL.
 163  */
 164 extern int compat_convert_timespec(struct timespec __user **,
 165                                    const void __user *);
 166
 167 struct compat_iovec {
 168         compat_uptr_t   iov_base;
 169         compat_size_t   iov_len;
 170 };
 171
 172 struct compat_rlimit {
 173         compat_ulong_t  rlim_cur;
 174         compat_ulong_t  rlim_max;
 175 };
 176
 177 struct compat_rusage {
 178         struct compat_timeval ru_utime;
 179         struct compat_timeval ru_stime;
 180         compat_long_t   ru_maxrss;
 181         compat_long_t   ru_ixrss;
 182         compat_long_t   ru_idrss;
 183         compat_long_t   ru_isrss;
 184         compat_long_t   ru_minflt;
 185         compat_long_t   ru_majflt;
 186         compat_long_t   ru_nswap;
 187         compat_long_t   ru_inblock;
 188         compat_long_t   ru_oublock;
 189         compat_long_t   ru_msgsnd;
 190         compat_long_t   ru_msgrcv;
 191         compat_long_t   ru_nsignals;
 192         compat_long_t   ru_nvcsw;
 193         compat_long_t   ru_nivcsw;
 194 };
 195
 196 extern int put_compat_rusage(const struct rusage *,
 197                              struct compat_rusage __user *);
 198
 199 struct compat_siginfo;
 200
 201 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 202                 struct compat_siginfo __user *, int,
 203                 struct compat_rusage __user *);
 204
 205 struct compat_dirent {
 206         u32             d_ino;
 207         compat_off_t    d_off;
 208         u16             d_reclen;
 209         char            d_name[256];
 210 };
 211
 212 struct compat_ustat {
 213         compat_daddr_t          f_tfree;
 214         compat_ino_t            f_tinode;
 215         char                    f_fname[6];
 216         char                    f_fpack[6];
 217 };
 218
 219 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 220
 221 typedef struct compat_sigevent {
 222         compat_sigval_t sigev_value;
 223         compat_int_t sigev_signo;
 224         compat_int_t sigev_notify;
 225         union {
 226                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 227                 compat_int_t _tid;
 228
 229                 struct {
 230                         compat_uptr_t _function;
 231                         compat_uptr_t _attribute;
 232                 } _sigev_thread;
 233         } _sigev_un;
 234 } compat_sigevent_t;
 235
 236 struct compat_ifmap {
 237         compat_ulong_t mem_start;
 238         compat_ulong_t mem_end;
 239         unsigned short base_addr;
 240         unsigned char irq;
 241         unsigned char dma;
 242         unsigned char port;
 243 };
 244
 245 struct compat_if_settings {
 246         unsigned int type;      /* Type of physical device or protocol */
 247         unsigned int size;      /* Size of the data allocated by the caller */
 248         compat_uptr_t ifs_ifsu; /* union of pointers */
 249 };
 250
 251 struct compat_ifreq {
 252         union {
 253                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 254         } ifr_ifrn;
 255         union {
 256                 struct  sockaddr ifru_addr;
 257                 struct  sockaddr ifru_dstaddr;
 258                 struct  sockaddr ifru_broadaddr;
 259                 struct  sockaddr ifru_netmask;
 260                 struct  sockaddr ifru_hwaddr;
 261                 short   ifru_flags;
 262                 compat_int_t    ifru_ivalue;
 263                 compat_int_t    ifru_mtu;
 264                 struct  compat_ifmap ifru_map;
 265                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 266                 char    ifru_newname[IFNAMSIZ];
 267                 compat_caddr_t  ifru_data;
 268                 struct  compat_if_settings ifru_settings;
 269         } ifr_ifru;
 270 };
 271
 272 struct compat_ifconf {
 273         compat_int_t    ifc_len;                /* size of buffer */
 274         compat_caddr_t  ifcbuf;
 275 };
 276
 277 struct compat_robust_list {
 278         compat_uptr_t                   next;
 279 };
 280
 281 struct compat_robust_list_head {
 282         struct compat_robust_list       list;
 283         compat_long_t                   futex_offset;
 284         compat_uptr_t                   list_op_pending;
 285 };
 286
 287 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 288 struct compat_old_sigaction {
 289         compat_uptr_t                   sa_handler;
 290         compat_old_sigset_t             sa_mask;
 291         compat_ulong_t                  sa_flags;
 292         compat_uptr_t                   sa_restorer;
 293 };
 294 #endif
 295
 296 struct compat_statfs;
 297 struct compat_statfs64;
 298 struct compat_old_linux_dirent;
 299 struct compat_linux_dirent;
 300 struct linux_dirent64;
 301 struct compat_msghdr;
 302 struct compat_mmsghdr;
 303 struct compat_sysinfo;
 304 struct compat_sysctl_args;
 305 struct compat_kexec_segment;
 306 struct compat_mq_attr;
 307 struct compat_msgbuf;
 308
 309 extern void compat_exit_robust_list(struct task_struct *curr);
 310
 311 asmlinkage long
 312 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 313                            compat_size_t len);
 314 asmlinkage long
 315 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 316                            compat_size_t __user *len_ptr);
 317
 318 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
 319 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 320 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 321 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 322                 compat_ssize_t msgsz, int msgflg);
 323 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
 324                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
 325 long compat_sys_msgctl(int first, int second, void __user *uptr);
 326 long compat_sys_shmctl(int first, int second, void __user *uptr);
 327 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 328                 unsigned nsems, const struct compat_timespec __user *timeout);
 329 asmlinkage long compat_sys_keyctl(u32 option,
 330                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 331 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 332
 333 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
 334                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 335 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
 336                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 337 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 338                 const struct compat_iovec __user *vec,
 339                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 340 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 341                 const struct compat_iovec __user *vec,
 342                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 343
 344 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
 345 asmlinkage long compat_sys_preadv64(unsigned long fd,
 346                 const struct compat_iovec __user *vec,
 347                 unsigned long vlen, loff_t pos);
 348 #endif
 349
 350 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
 351 asmlinkage long compat_sys_pwritev64(unsigned long fd,
 352                 const struct compat_iovec __user *vec,
 353                 unsigned long vlen, loff_t pos);
 354 #endif
 355
 356 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 357
 358 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 359                      const compat_uptr_t __user *envp);
 360
 361 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 362                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 363                 struct compat_timeval __user *tvp);
 364
 365 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 366
 367 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 368                                  compat_uint_t __user *stat_addr, int options,
 369                                  struct compat_rusage __user *ru);
 370
 371 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 372
 373 #define BITS_TO_COMPAT_LONGS(bits) \
 374         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 375
 376 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 377                        unsigned long bitmap_size);
 378 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 379                        unsigned long bitmap_size);
 380 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 381 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
 382 int get_compat_sigevent(struct sigevent *event,
 383                 const struct compat_sigevent __user *u_event);
 384 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 385                                   struct compat_siginfo __user *uinfo);
 386 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 387 asmlinkage long compat_sys_sigaction(int sig,
 388                                    const struct compat_old_sigaction __user *act,
 389                                    struct compat_old_sigaction __user *oact);
 390 #endif
 391
 392 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 393                                         struct compat_timeval *rhs)
 394 {
 395         if (lhs->tv_sec < rhs->tv_sec)
 396                 return -1;
 397         if (lhs->tv_sec > rhs->tv_sec)
 398                 return 1;
 399         return lhs->tv_usec - rhs->tv_usec;
 400 }
 401
 402 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 403                                         struct compat_timespec *rhs)
 404 {
 405         if (lhs->tv_sec < rhs->tv_sec)
 406                 return -1;
 407         if (lhs->tv_sec > rhs->tv_sec)
 408                 return 1;
 409         return lhs->tv_nsec - rhs->tv_nsec;
 410 }
 411
 412 extern int get_compat_itimerspec(struct itimerspec *dst,
 413                                  const struct compat_itimerspec __user *src);
 414 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 415                                  const struct itimerspec *src);
 416
 417 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 418                 struct timezone __user *tz);
 419 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 420                 struct timezone __user *tz);
 421
 422 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 423
 424 extern int compat_printk(const char *fmt, ...);
 425 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
 426 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
 427
 428 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 429                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 430                 const compat_ulong_t __user *new_nodes);
 431
 432 extern int compat_ptrace_request(struct task_struct *child,
 433                                  compat_long_t request,
 434                                  compat_ulong_t addr, compat_ulong_t data);
 435
 436 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 437                                compat_ulong_t addr, compat_ulong_t data);
 438 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 439                                   compat_long_t addr, compat_long_t data);
 440
 441 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 442 /*
 443  * epoll (fs/eventpoll.c) compat bits follow ...
 444  */
 445 struct epoll_event;     /* fortunately, this one is fixed-layout */
 446 asmlinkage long compat_sys_epoll_pwait(int epfd,
 447                         struct epoll_event __user *events,
 448                         int maxevents, int timeout,
 449                         const compat_sigset_t __user *sigmask,
 450                         compat_size_t sigsetsize);
 451
 452 asmlinkage long compat_sys_utime(const char __user *filename,
 453                                  struct compat_utimbuf __user *t);
 454 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 455                                      const char __user *filename,
 456                                      struct compat_timespec __user *t,
 457                                      int flags);
 458
 459 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 460 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 461 asmlinkage long compat_sys_signalfd(int ufd,
 462                                     const compat_sigset_t __user *sigmask,
 463                                     compat_size_t sigsetsize);
 464 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 465                                    const struct compat_itimerspec __user *utmr,
 466                                    struct compat_itimerspec __user *otmr);
 467 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 468                                    struct compat_itimerspec __user *otmr);
 469
 470 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
 471                                       __u32 __user *pages,
 472                                       const int __user *nodes,
 473                                       int __user *status,
 474                                       int flags);
 475 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 476                                      const char __user *filename,
 477                                      struct compat_timeval __user *t);
 478 asmlinkage long compat_sys_utimes(const char __user *filename,
 479                                   struct compat_timeval __user *t);
 480 asmlinkage long compat_sys_newstat(const char __user *filename,
 481                                    struct compat_stat __user *statbuf);
 482 asmlinkage long compat_sys_newlstat(const char __user *filename,
 483                                     struct compat_stat __user *statbuf);
 484 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 485                                       const char __user *filename,
 486                                       struct compat_stat __user *statbuf,
 487                                       int flag);
 488 asmlinkage long compat_sys_newfstat(unsigned int fd,
 489                                     struct compat_stat __user *statbuf);
 490 asmlinkage long compat_sys_statfs(const char __user *pathname,
 491                                   struct compat_statfs __user *buf);
 492 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 493                                    struct compat_statfs __user *buf);
 494 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 495                                     compat_size_t sz,
 496                                     struct compat_statfs64 __user *buf);
 497 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 498                                      struct compat_statfs64 __user *buf);
 499 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 500                                    compat_ulong_t arg);
 501 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 502                                  compat_ulong_t arg);
 503 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 504 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
 505                                         compat_long_t min_nr,
 506                                         compat_long_t nr,
 507                                         struct io_event __user *events,
 508                                         struct compat_timespec __user *timeout);
 509 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 510                                      u32 __user *iocb);
 511 asmlinkage long compat_sys_mount(const char __user *dev_name,
 512                                  const char __user *dir_name,
 513                                  const char __user *type, compat_ulong_t flags,
 514                                  const void __user *data);
 515 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 516                                        struct compat_old_linux_dirent __user *,
 517                                        unsigned int count);
 518 asmlinkage long compat_sys_getdents(unsigned int fd,
 519                                     struct compat_linux_dirent __user *dirent,
 520                                     unsigned int count);
 521 #ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
 522 asmlinkage long compat_sys_getdents64(unsigned int fd,
 523                                       struct linux_dirent64 __user *dirent,
 524                                       unsigned int count);
 525 #endif
 526 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 527                                     unsigned int nr_segs, unsigned int flags);
 528 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 529                                 umode_t mode);
 530 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 531                                   int flags, umode_t mode);
 532 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 533                                              struct file_handle __user *handle,
 534                                              int flags);
 535 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 536 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 537 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 538                                     compat_ulong_t __user *outp,
 539                                     compat_ulong_t __user *exp,
 540                                     struct compat_timespec __user *tsp,
 541                                     void __user *sig);
 542 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 543                                  unsigned int nfds,
 544                                  struct compat_timespec __user *tsp,
 545                                  const compat_sigset_t __user *sigmask,
 546                                  compat_size_t sigsetsize);
 547 asmlinkage long compat_sys_signalfd4(int ufd,
 548                                      const compat_sigset_t __user *sigmask,
 549                                      compat_size_t sigsetsize, int flags);
 550 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 551                                          compat_ulong_t __user *nmask,
 552                                          compat_ulong_t maxnode,
 553                                          compat_ulong_t addr,
 554                                          compat_ulong_t flags);
 555 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 556                                          compat_ulong_t maxnode);
 557 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 558                                  compat_ulong_t mode,
 559                                  compat_ulong_t __user *nmask,
 560                                  compat_ulong_t maxnode, compat_ulong_t flags);
 561
 562 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 563                                       char __user *optval, unsigned int optlen);
 564 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 565                                    unsigned flags);
 566 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 567                                     unsigned vlen, unsigned int flags);
 568 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 569                                    unsigned int flags);
 570 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
 571                                 unsigned flags);
 572 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
 573                             unsigned flags, struct sockaddr __user *addr,
 574                             int __user *addrlen);
 575 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 576                                     unsigned vlen, unsigned int flags,
 577                                     struct compat_timespec __user *timeout);
 578 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 579                                      struct compat_timespec __user *rmtp);
 580 asmlinkage long compat_sys_getitimer(int which,
 581                                      struct compat_itimerval __user *it);
 582 asmlinkage long compat_sys_setitimer(int which,
 583                                      struct compat_itimerval __user *in,
 584                                      struct compat_itimerval __user *out);
 585 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 586 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 587                                      struct compat_rlimit __user *rlim);
 588 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 589                                      struct compat_rlimit __user *rlim);
 590 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 591 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 592                                      unsigned int len,
 593                                      compat_ulong_t __user *user_mask_ptr);
 594 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 595                                      unsigned int len,
 596                                      compat_ulong_t __user *user_mask_ptr);
 597 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 598                         struct compat_sigevent __user *timer_event_spec,
 599                         timer_t __user *created_timer_id);
 600 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 601                                          struct compat_itimerspec __user *new,
 602                                          struct compat_itimerspec __user *old);
 603 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 604                                  struct compat_itimerspec __user *setting);
 605 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 606                                          struct compat_timespec __user *tp);
 607 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 608                                          struct compat_timespec __user *tp);
 609 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 610                                          struct compat_timex __user *tp);
 611 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 612                                         struct compat_timespec __user *tp);
 613 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 614                                            struct compat_timespec __user *rqtp,
 615                                            struct compat_timespec __user *rmtp);
 616 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 617                 struct compat_siginfo __user *uinfo,
 618                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 619 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 620                                          compat_size_t sigsetsize);
 621 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 622                                           compat_sigset_t __user *oset,
 623                                           compat_size_t sigsetsize);
 624 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 625                                          compat_size_t sigsetsize);
 626 #ifndef CONFIG_ODD_RT_SIGACTION
 627 asmlinkage long compat_sys_rt_sigaction(int,
 628                                  const struct compat_sigaction __user *,
 629                                  struct compat_sigaction __user *,
 630                                  compat_size_t);
 631 #endif
 632 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 633                                 struct compat_siginfo __user *uinfo);
 634 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 635 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 636                                  compat_ulong_t arg);
 637 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 638                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 639                 u32 val3);
 640 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 641                                       char __user *optval, int __user *optlen);
 642 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
 643                                       compat_ulong_t nr_segments,
 644                                       struct compat_kexec_segment __user *,
 645                                       compat_ulong_t flags);
 646 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 647                         const struct compat_mq_attr __user *u_mqstat,
 648                         struct compat_mq_attr __user *u_omqstat);
 649 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 650                         const struct compat_sigevent __user *u_notification);
 651 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 652                         int oflag, compat_mode_t mode,
 653                         struct compat_mq_attr __user *u_attr);
 654 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 655                         const char __user *u_msg_ptr,
 656                         compat_size_t msg_len, unsigned int msg_prio,
 657                         const struct compat_timespec __user *u_abs_timeout);
 658 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 659                         char __user *u_msg_ptr,
 660                         compat_size_t msg_len, unsigned int __user *u_msg_prio,
 661                         const struct compat_timespec __user *u_abs_timeout);
 662 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 663 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 664
 665 extern ssize_t compat_rw_copy_check_uvector(int type,
 666                 const struct compat_iovec __user *uvector,
 667                 unsigned long nr_segs,
 668                 unsigned long fast_segs, struct iovec *fast_pointer,
 669                 struct iovec **ret_pointer);
 670
 671 extern void __user *compat_alloc_user_space(unsigned long len);
 672
 673 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 674                 const struct compat_iovec __user *lvec,
 675                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 676                 compat_ulong_t riovcnt, compat_ulong_t flags);
 677 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 678                 const struct compat_iovec __user *lvec,
 679                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 680                 compat_ulong_t riovcnt, compat_ulong_t flags);
 681
 682 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 683                                     compat_off_t __user *offset, compat_size_t count);
 684 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 685                                     compat_loff_t __user *offset, compat_size_t count);
 686 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 687                                        compat_stack_t __user *uoss_ptr);
 688
 689 int compat_restore_altstack(const compat_stack_t __user *uss);
 690 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 691 #define compat_save_altstack_ex(uss, sp) do { \
 692         compat_stack_t __user *__uss = uss; \
 693         struct task_struct *t = current; \
 694         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
 695         put_user_ex(sas_ss_flags(sp), &__uss->ss_flags); \
 696         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
 697 } while (0);
 698
 699 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 700                                                  struct compat_timespec __user *interval);
 701
 702 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 703                                             int, const char __user *);
 704 #else
 705
 706 #define is_compat_task() (0)
 707
 708 #endif /* CONFIG_COMPAT */
 709 #endif /* _LINUX_COMPAT_H */