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
  18 #include <asm/compat.h>
  19 #include <asm/siginfo.h>
  20 #include <asm/signal.h>
  21
  22 #ifndef COMPAT_USE_64BIT_TIME
  23 #define COMPAT_USE_64BIT_TIME 0
  24 #endif
  25
  26 #ifndef __SC_DELOUSE
  27 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
  28 #endif
  29
  30 #define __SC_CCAST1(t1, a1)      __SC_DELOUSE(t1,a1)
  31 #define __SC_CCAST2(t2, a2, ...) __SC_DELOUSE(t2,a2), __SC_CCAST1(__VA_ARGS__)
  32 #define __SC_CCAST3(t3, a3, ...) __SC_DELOUSE(t3,a3), __SC_CCAST2(__VA_ARGS__)
  33 #define __SC_CCAST4(t4, a4, ...) __SC_DELOUSE(t4,a4), __SC_CCAST3(__VA_ARGS__)
  34 #define __SC_CCAST5(t5, a5, ...) __SC_DELOUSE(t5,a5), __SC_CCAST4(__VA_ARGS__)
  35 #define __SC_CCAST6(t6, a6, ...) __SC_DELOUSE(t6,a6), __SC_CCAST5(__VA_ARGS__)
  36 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
  37         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
  38 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
  39         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
  40 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
  41         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
  42 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
  43         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
  44 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
  45         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
  46 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
  47         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
  48
  49 #ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
  50
  51 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  52         asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__));    \
  53         static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__));     \
  54         asmlinkage long compat_SyS##name(__SC_LONG##x(__VA_ARGS__))     \
  55         {                                                               \
  56                 return (long) C_SYSC##name(__SC_CCAST##x(__VA_ARGS__)); \
  57         }                                                               \
  58         SYSCALL_ALIAS(compat_sys##name, compat_SyS##name);              \
  59         static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__))
  60
  61 #else /* CONFIG_HAVE_SYSCALL_WRAPPERS */
  62
  63 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  64         asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__))
  65
  66 #endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
  67
  68 #ifndef compat_user_stack_pointer
  69 #define compat_user_stack_pointer() current_user_stack_pointer()
  70 #endif
  71 #ifdef CONFIG_GENERIC_SIGALTSTACK
  72 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  73 typedef struct compat_sigaltstack {
  74         compat_uptr_t                   ss_sp;
  75         int                             ss_flags;
  76         compat_size_t                   ss_size;
  77 } compat_stack_t;
  78 #endif
  79 #endif
  80
  81 #define compat_jiffies_to_clock_t(x)    \
  82                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  83
  84 typedef __compat_uid32_t        compat_uid_t;
  85 typedef __compat_gid32_t        compat_gid_t;
  86
  87 struct compat_sel_arg_struct;
  88 struct rusage;
  89
  90 struct compat_itimerspec {
  91         struct compat_timespec it_interval;
  92         struct compat_timespec it_value;
  93 };
  94
  95 struct compat_utimbuf {
  96         compat_time_t           actime;
  97         compat_time_t           modtime;
  98 };
  99
 100 struct compat_itimerval {
 101         struct compat_timeval   it_interval;
 102         struct compat_timeval   it_value;
 103 };
 104
 105 struct compat_tms {
 106         compat_clock_t          tms_utime;
 107         compat_clock_t          tms_stime;
 108         compat_clock_t          tms_cutime;
 109         compat_clock_t          tms_cstime;
 110 };
 111
 112 struct compat_timex {
 113         compat_uint_t modes;
 114         compat_long_t offset;
 115         compat_long_t freq;
 116         compat_long_t maxerror;
 117         compat_long_t esterror;
 118         compat_int_t status;
 119         compat_long_t constant;
 120         compat_long_t precision;
 121         compat_long_t tolerance;
 122         struct compat_timeval time;
 123         compat_long_t tick;
 124         compat_long_t ppsfreq;
 125         compat_long_t jitter;
 126         compat_int_t shift;
 127         compat_long_t stabil;
 128         compat_long_t jitcnt;
 129         compat_long_t calcnt;
 130         compat_long_t errcnt;
 131         compat_long_t stbcnt;
 132         compat_int_t tai;
 133
 134         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 135         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 136         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 137 };
 138
 139 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 140
 141 typedef struct {
 142         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 143 } compat_sigset_t;
 144
 145 /*
 146  * These functions operate strictly on struct compat_time*
 147  */
 148 extern int get_compat_timespec(struct timespec *,
 149                                const struct compat_timespec __user *);
 150 extern int put_compat_timespec(const struct timespec *,
 151                                struct compat_timespec __user *);
 152 extern int get_compat_timeval(struct timeval *,
 153                               const struct compat_timeval __user *);
 154 extern int put_compat_timeval(const struct timeval *,
 155                               struct compat_timeval __user *);
 156 /*
 157  * These functions operate on 32- or 64-bit specs depending on
 158  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the
 159  * naming as compat_get/put_ rather than get/put_compat_.
 160  */
 161 extern int compat_get_timespec(struct timespec *, const void __user *);
 162 extern int compat_put_timespec(const struct timespec *, void __user *);
 163 extern int compat_get_timeval(struct timeval *, const void __user *);
 164 extern int compat_put_timeval(const struct timeval *, void __user *);
 165
 166 struct compat_iovec {
 167         compat_uptr_t   iov_base;
 168         compat_size_t   iov_len;
 169 };
 170
 171 struct compat_rlimit {
 172         compat_ulong_t  rlim_cur;
 173         compat_ulong_t  rlim_max;
 174 };
 175
 176 struct compat_rusage {
 177         struct compat_timeval ru_utime;
 178         struct compat_timeval ru_stime;
 179         compat_long_t   ru_maxrss;
 180         compat_long_t   ru_ixrss;
 181         compat_long_t   ru_idrss;
 182         compat_long_t   ru_isrss;
 183         compat_long_t   ru_minflt;
 184         compat_long_t   ru_majflt;
 185         compat_long_t   ru_nswap;
 186         compat_long_t   ru_inblock;
 187         compat_long_t   ru_oublock;
 188         compat_long_t   ru_msgsnd;
 189         compat_long_t   ru_msgrcv;
 190         compat_long_t   ru_nsignals;
 191         compat_long_t   ru_nvcsw;
 192         compat_long_t   ru_nivcsw;
 193 };
 194
 195 extern int put_compat_rusage(const struct rusage *,
 196                              struct compat_rusage __user *);
 197
 198 struct compat_siginfo;
 199
 200 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 201                 struct compat_siginfo __user *, int,
 202                 struct compat_rusage __user *);
 203
 204 struct compat_dirent {
 205         u32             d_ino;
 206         compat_off_t    d_off;
 207         u16             d_reclen;
 208         char            d_name[256];
 209 };
 210
 211 struct compat_ustat {
 212         compat_daddr_t          f_tfree;
 213         compat_ino_t            f_tinode;
 214         char                    f_fname[6];
 215         char                    f_fpack[6];
 216 };
 217
 218 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 219
 220 typedef struct compat_sigevent {
 221         compat_sigval_t sigev_value;
 222         compat_int_t sigev_signo;
 223         compat_int_t sigev_notify;
 224         union {
 225                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 226                 compat_int_t _tid;
 227
 228                 struct {
 229                         compat_uptr_t _function;
 230                         compat_uptr_t _attribute;
 231                 } _sigev_thread;
 232         } _sigev_un;
 233 } compat_sigevent_t;
 234
 235 struct compat_ifmap {
 236         compat_ulong_t mem_start;
 237         compat_ulong_t mem_end;
 238         unsigned short base_addr;
 239         unsigned char irq;
 240         unsigned char dma;
 241         unsigned char port;
 242 };
 243
 244 struct compat_if_settings {
 245         unsigned int type;      /* Type of physical device or protocol */
 246         unsigned int size;      /* Size of the data allocated by the caller */
 247         compat_uptr_t ifs_ifsu; /* union of pointers */
 248 };
 249
 250 struct compat_ifreq {
 251         union {
 252                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 253         } ifr_ifrn;
 254         union {
 255                 struct  sockaddr ifru_addr;
 256                 struct  sockaddr ifru_dstaddr;
 257                 struct  sockaddr ifru_broadaddr;
 258                 struct  sockaddr ifru_netmask;
 259                 struct  sockaddr ifru_hwaddr;
 260                 short   ifru_flags;
 261                 compat_int_t    ifru_ivalue;
 262                 compat_int_t    ifru_mtu;
 263                 struct  compat_ifmap ifru_map;
 264                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 265                 char    ifru_newname[IFNAMSIZ];
 266                 compat_caddr_t  ifru_data;
 267                 struct  compat_if_settings ifru_settings;
 268         } ifr_ifru;
 269 };
 270
 271 struct compat_ifconf {
 272         compat_int_t    ifc_len;                /* size of buffer */
 273         compat_caddr_t  ifcbuf;
 274 };
 275
 276 struct compat_robust_list {
 277         compat_uptr_t                   next;
 278 };
 279
 280 struct compat_robust_list_head {
 281         struct compat_robust_list       list;
 282         compat_long_t                   futex_offset;
 283         compat_uptr_t                   list_op_pending;
 284 };
 285
 286 struct compat_statfs;
 287 struct compat_statfs64;
 288 struct compat_old_linux_dirent;
 289 struct compat_linux_dirent;
 290 struct linux_dirent64;
 291 struct compat_msghdr;
 292 struct compat_mmsghdr;
 293 struct compat_sysinfo;
 294 struct compat_sysctl_args;
 295 struct compat_kexec_segment;
 296 struct compat_mq_attr;
 297 struct compat_msgbuf;
 298
 299 extern void compat_exit_robust_list(struct task_struct *curr);
 300
 301 asmlinkage long
 302 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 303                            compat_size_t len);
 304 asmlinkage long
 305 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 306                            compat_size_t __user *len_ptr);
 307
 308 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
 309 long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 310 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 311 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 312                 int version, void __user *uptr);
 313 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 314                 void __user *uptr);
 315 #else
 316 long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 317 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
 318                 compat_ssize_t msgsz, int msgflg);
 319 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
 320                 compat_ssize_t msgsz, long msgtyp, int msgflg);
 321 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 322 #endif
 323 long compat_sys_msgctl(int first, int second, void __user *uptr);
 324 long compat_sys_shmctl(int first, int second, void __user *uptr);
 325 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 326                 unsigned nsems, const struct compat_timespec __user *timeout);
 327 asmlinkage long compat_sys_keyctl(u32 option,
 328                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 329 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 330
 331 asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 332                 const struct compat_iovec __user *vec, unsigned long vlen);
 333 asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 334                 const struct compat_iovec __user *vec, unsigned long vlen);
 335 asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
 336                 const struct compat_iovec __user *vec,
 337                 unsigned long vlen, u32 pos_low, u32 pos_high);
 338 asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
 339                 const struct compat_iovec __user *vec,
 340                 unsigned long vlen, u32 pos_low, u32 pos_high);
 341
 342 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 343                      const compat_uptr_t __user *envp);
 344
 345 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 346                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 347                 struct compat_timeval __user *tvp);
 348
 349 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 350
 351 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 352                                  compat_uint_t __user *stat_addr, int options,
 353                                  struct compat_rusage __user *ru);
 354
 355 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 356
 357 #define BITS_TO_COMPAT_LONGS(bits) \
 358         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 359
 360 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 361                        unsigned long bitmap_size);
 362 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 363                        unsigned long bitmap_size);
 364 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 365 int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 366 int get_compat_sigevent(struct sigevent *event,
 367                 const struct compat_sigevent __user *u_event);
 368 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 369                                   struct compat_siginfo __user *uinfo);
 370
 371 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 372                                         struct compat_timeval *rhs)
 373 {
 374         if (lhs->tv_sec < rhs->tv_sec)
 375                 return -1;
 376         if (lhs->tv_sec > rhs->tv_sec)
 377                 return 1;
 378         return lhs->tv_usec - rhs->tv_usec;
 379 }
 380
 381 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 382                                         struct compat_timespec *rhs)
 383 {
 384         if (lhs->tv_sec < rhs->tv_sec)
 385                 return -1;
 386         if (lhs->tv_sec > rhs->tv_sec)
 387                 return 1;
 388         return lhs->tv_nsec - rhs->tv_nsec;
 389 }
 390
 391 extern int get_compat_itimerspec(struct itimerspec *dst,
 392                                  const struct compat_itimerspec __user *src);
 393 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 394                                  const struct itimerspec *src);
 395
 396 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 397                 struct timezone __user *tz);
 398 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 399                 struct timezone __user *tz);
 400
 401 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 402
 403 extern int compat_printk(const char *fmt, ...);
 404 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
 405
 406 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 407                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 408                 const compat_ulong_t __user *new_nodes);
 409
 410 extern int compat_ptrace_request(struct task_struct *child,
 411                                  compat_long_t request,
 412                                  compat_ulong_t addr, compat_ulong_t data);
 413
 414 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 415                                compat_ulong_t addr, compat_ulong_t data);
 416 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 417                                   compat_long_t addr, compat_long_t data);
 418
 419 /*
 420  * epoll (fs/eventpoll.c) compat bits follow ...
 421  */
 422 struct epoll_event;
 423 #define compat_epoll_event      epoll_event
 424 asmlinkage long compat_sys_epoll_pwait(int epfd,
 425                         struct compat_epoll_event __user *events,
 426                         int maxevents, int timeout,
 427                         const compat_sigset_t __user *sigmask,
 428                         compat_size_t sigsetsize);
 429
 430 asmlinkage long compat_sys_utime(const char __user *filename,
 431                                  struct compat_utimbuf __user *t);
 432 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 433                                      const char __user *filename,
 434                                      struct compat_timespec __user *t,
 435                                      int flags);
 436
 437 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 438 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 439 asmlinkage long compat_sys_signalfd(int ufd,
 440                                     const compat_sigset_t __user *sigmask,
 441                                     compat_size_t sigsetsize);
 442 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 443                                    const struct compat_itimerspec __user *utmr,
 444                                    struct compat_itimerspec __user *otmr);
 445 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 446                                    struct compat_itimerspec __user *otmr);
 447
 448 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
 449                                       __u32 __user *pages,
 450                                       const int __user *nodes,
 451                                       int __user *status,
 452                                       int flags);
 453 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 454                                      const char __user *filename,
 455                                      struct compat_timeval __user *t);
 456 asmlinkage long compat_sys_utimes(const char __user *filename,
 457                                   struct compat_timeval __user *t);
 458 asmlinkage long compat_sys_newstat(const char __user *filename,
 459                                    struct compat_stat __user *statbuf);
 460 asmlinkage long compat_sys_newlstat(const char __user *filename,
 461                                     struct compat_stat __user *statbuf);
 462 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 463                                       const char __user *filename,
 464                                       struct compat_stat __user *statbuf,
 465                                       int flag);
 466 asmlinkage long compat_sys_newfstat(unsigned int fd,
 467                                     struct compat_stat __user *statbuf);
 468 asmlinkage long compat_sys_statfs(const char __user *pathname,
 469                                   struct compat_statfs __user *buf);
 470 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 471                                    struct compat_statfs __user *buf);
 472 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 473                                     compat_size_t sz,
 474                                     struct compat_statfs64 __user *buf);
 475 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 476                                      struct compat_statfs64 __user *buf);
 477 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 478                                    unsigned long arg);
 479 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 480                                  unsigned long arg);
 481 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 482 asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id,
 483                                         unsigned long min_nr,
 484                                         unsigned long nr,
 485                                         struct io_event __user *events,
 486                                         struct compat_timespec __user *timeout);
 487 asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr,
 488                                      u32 __user *iocb);
 489 asmlinkage long compat_sys_mount(const char __user *dev_name,
 490                                  const char __user *dir_name,
 491                                  const char __user *type, unsigned long flags,
 492                                  const void __user *data);
 493 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 494                                        struct compat_old_linux_dirent __user *,
 495                                        unsigned int count);
 496 asmlinkage long compat_sys_getdents(unsigned int fd,
 497                                     struct compat_linux_dirent __user *dirent,
 498                                     unsigned int count);
 499 asmlinkage long compat_sys_getdents64(unsigned int fd,
 500                                       struct linux_dirent64 __user *dirent,
 501                                       unsigned int count);
 502 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 503                                     unsigned int nr_segs, unsigned int flags);
 504 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 505                                 umode_t mode);
 506 asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename,
 507                                   int flags, umode_t mode);
 508 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 509                                              struct file_handle __user *handle,
 510                                              int flags);
 511 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 512                                     compat_ulong_t __user *outp,
 513                                     compat_ulong_t __user *exp,
 514                                     struct compat_timespec __user *tsp,
 515                                     void __user *sig);
 516 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 517                                  unsigned int nfds,
 518                                  struct compat_timespec __user *tsp,
 519                                  const compat_sigset_t __user *sigmask,
 520                                  compat_size_t sigsetsize);
 521 asmlinkage long compat_sys_signalfd4(int ufd,
 522                                      const compat_sigset_t __user *sigmask,
 523                                      compat_size_t sigsetsize, int flags);
 524 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 525                                          compat_ulong_t __user *nmask,
 526                                          compat_ulong_t maxnode,
 527                                          compat_ulong_t addr,
 528                                          compat_ulong_t flags);
 529 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 530                                          compat_ulong_t maxnode);
 531 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 532                                  compat_ulong_t mode,
 533                                  compat_ulong_t __user *nmask,
 534                                  compat_ulong_t maxnode, compat_ulong_t flags);
 535
 536 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 537                                       char __user *optval, unsigned int optlen);
 538 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 539                                    unsigned flags);
 540 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 541                                     unsigned vlen, unsigned int flags);
 542 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 543                                    unsigned int flags);
 544 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len,
 545                                 unsigned flags);
 546 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
 547                             unsigned flags, struct sockaddr __user *addr,
 548                             int __user *addrlen);
 549 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 550                                     unsigned vlen, unsigned int flags,
 551                                     struct compat_timespec __user *timeout);
 552 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 553                                      struct compat_timespec __user *rmtp);
 554 asmlinkage long compat_sys_getitimer(int which,
 555                                      struct compat_itimerval __user *it);
 556 asmlinkage long compat_sys_setitimer(int which,
 557                                      struct compat_itimerval __user *in,
 558                                      struct compat_itimerval __user *out);
 559 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 560 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 561                                      struct compat_rlimit __user *rlim);
 562 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 563                                      struct compat_rlimit __user *rlim);
 564 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 565 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 566                                      unsigned int len,
 567                                      compat_ulong_t __user *user_mask_ptr);
 568 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 569                                      unsigned int len,
 570                                      compat_ulong_t __user *user_mask_ptr);
 571 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 572                         struct compat_sigevent __user *timer_event_spec,
 573                         timer_t __user *created_timer_id);
 574 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 575                                          struct compat_itimerspec __user *new,
 576                                          struct compat_itimerspec __user *old);
 577 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 578                                  struct compat_itimerspec __user *setting);
 579 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 580                                          struct compat_timespec __user *tp);
 581 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 582                                          struct compat_timespec __user *tp);
 583 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 584                                          struct compat_timex __user *tp);
 585 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 586                                         struct compat_timespec __user *tp);
 587 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 588                                            struct compat_timespec __user *rqtp,
 589                                            struct compat_timespec __user *rmtp);
 590 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 591                 struct compat_siginfo __user *uinfo,
 592                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 593 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 594                                          compat_size_t sigsetsize);
 595 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 596 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 597                                  unsigned long arg);
 598 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 599                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 600                 u32 val3);
 601 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 602                                       char __user *optval, int __user *optlen);
 603 asmlinkage long compat_sys_kexec_load(unsigned long entry,
 604                                       unsigned long nr_segments,
 605                                       struct compat_kexec_segment __user *,
 606                                       unsigned long flags);
 607 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 608                         const struct compat_mq_attr __user *u_mqstat,
 609                         struct compat_mq_attr __user *u_omqstat);
 610 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 611                         const struct compat_sigevent __user *u_notification);
 612 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 613                         int oflag, compat_mode_t mode,
 614                         struct compat_mq_attr __user *u_attr);
 615 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 616                         const char __user *u_msg_ptr,
 617                         size_t msg_len, unsigned int msg_prio,
 618                         const struct compat_timespec __user *u_abs_timeout);
 619 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 620                         char __user *u_msg_ptr,
 621                         size_t msg_len, unsigned int __user *u_msg_prio,
 622                         const struct compat_timespec __user *u_abs_timeout);
 623 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 624 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 625
 626 extern ssize_t compat_rw_copy_check_uvector(int type,
 627                 const struct compat_iovec __user *uvector,
 628                 unsigned long nr_segs,
 629                 unsigned long fast_segs, struct iovec *fast_pointer,
 630                 struct iovec **ret_pointer);
 631
 632 extern void __user *compat_alloc_user_space(unsigned long len);
 633
 634 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 635                 const struct compat_iovec __user *lvec,
 636                 unsigned long liovcnt, const struct compat_iovec __user *rvec,
 637                 unsigned long riovcnt, unsigned long flags);
 638 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 639                 const struct compat_iovec __user *lvec,
 640                 unsigned long liovcnt, const struct compat_iovec __user *rvec,
 641                 unsigned long riovcnt, unsigned long flags);
 642
 643 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 644                                     compat_off_t __user *offset, compat_size_t count);
 645 #ifdef CONFIG_GENERIC_SIGALTSTACK
 646 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 647                                        compat_stack_t __user *uoss_ptr);
 648
 649 int compat_restore_altstack(const compat_stack_t __user *uss);
 650 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 651 #endif
 652
 653 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 654                                                  struct compat_timespec __user *interval);
 655
 656 #else
 657
 658 #define is_compat_task() (0)
 659
 660 #endif /* CONFIG_COMPAT */
 661 #endif /* _LINUX_COMPAT_H */