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