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 #include <linux/types.h>
   9
  10 #ifdef CONFIG_COMPAT
  11
  12 #include <linux/stat.h>
  13 #include <linux/param.h>        /* for HZ */
  14 #include <linux/sem.h>
  15 #include <linux/socket.h>
  16 #include <linux/if.h>
  17 #include <linux/fs.h>
  18 #include <linux/aio_abi.h>      /* for aio_context_t */
  19 #include <linux/unistd.h>
  20
  21 #include <asm/compat.h>
  22 #include <asm/siginfo.h>
  23 #include <asm/signal.h>
  24
  25 #ifndef COMPAT_USE_64BIT_TIME
  26 #define COMPAT_USE_64BIT_TIME 0
  27 #endif
  28
  29 #ifndef __SC_DELOUSE
  30 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
  31 #endif
  32
  33 #define COMPAT_SYSCALL_DEFINE0(name) \
  34         asmlinkage long compat_sys_##name(void)
  35
  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 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
  50         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
  51                 __attribute__((alias(__stringify(compat_SyS##name))));  \
  52         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
  53         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
  54         asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
  55         {                                                               \
  56                 return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
  57         }                                                               \
  58         static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  59
  60 #ifndef compat_user_stack_pointer
  61 #define compat_user_stack_pointer() current_user_stack_pointer()
  62 #endif
  63 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
  64 typedef struct compat_sigaltstack {
  65         compat_uptr_t                   ss_sp;
  66         int                             ss_flags;
  67         compat_size_t                   ss_size;
  68 } compat_stack_t;
  69 #endif
  70
  71 #define compat_jiffies_to_clock_t(x)    \
  72                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  73
  74 typedef __compat_uid32_t        compat_uid_t;
  75 typedef __compat_gid32_t        compat_gid_t;
  76
  77 typedef compat_ulong_t          compat_aio_context_t;
  78
  79 struct compat_sel_arg_struct;
  80 struct rusage;
  81
  82 struct compat_itimerspec {
  83         struct compat_timespec it_interval;
  84         struct compat_timespec it_value;
  85 };
  86
  87 struct compat_utimbuf {
  88         compat_time_t           actime;
  89         compat_time_t           modtime;
  90 };
  91
  92 struct compat_itimerval {
  93         struct compat_timeval   it_interval;
  94         struct compat_timeval   it_value;
  95 };
  96
  97 struct compat_tms {
  98         compat_clock_t          tms_utime;
  99         compat_clock_t          tms_stime;
 100         compat_clock_t          tms_cutime;
 101         compat_clock_t          tms_cstime;
 102 };
 103
 104 struct compat_timex {
 105         compat_uint_t modes;
 106         compat_long_t offset;
 107         compat_long_t freq;
 108         compat_long_t maxerror;
 109         compat_long_t esterror;
 110         compat_int_t status;
 111         compat_long_t constant;
 112         compat_long_t precision;
 113         compat_long_t tolerance;
 114         struct compat_timeval time;
 115         compat_long_t tick;
 116         compat_long_t ppsfreq;
 117         compat_long_t jitter;
 118         compat_int_t shift;
 119         compat_long_t stabil;
 120         compat_long_t jitcnt;
 121         compat_long_t calcnt;
 122         compat_long_t errcnt;
 123         compat_long_t stbcnt;
 124         compat_int_t tai;
 125
 126         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 127         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 128         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 129 };
 130
 131 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 132
 133 typedef struct {
 134         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 135 } compat_sigset_t;
 136
 137 struct compat_sigaction {
 138 #ifndef __ARCH_HAS_IRIX_SIGACTION
 139         compat_uptr_t                   sa_handler;
 140         compat_ulong_t                  sa_flags;
 141 #else
 142         compat_uint_t                   sa_flags;
 143         compat_uptr_t                   sa_handler;
 144 #endif
 145 #ifdef __ARCH_HAS_SA_RESTORER
 146         compat_uptr_t                   sa_restorer;
 147 #endif
 148         compat_sigset_t                 sa_mask __packed;
 149 };
 150
 151 /*
 152  * These functions operate on 32- or 64-bit specs depending on
 153  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
 154  */
 155 extern int compat_get_timespec(struct timespec *, const void __user *);
 156 extern int compat_put_timespec(const struct timespec *, void __user *);
 157 extern int compat_get_timeval(struct timeval *, const void __user *);
 158 extern int compat_put_timeval(const struct timeval *, void __user *);
 159
 160 /*
 161  * This function convert a timespec if necessary and returns a *user
 162  * space* pointer.  If no conversion is necessary, it returns the
 163  * initial pointer.  NULL is a legitimate argument and will always
 164  * output NULL.
 165  */
 166 extern int compat_convert_timespec(struct timespec __user **,
 167                                    const void __user *);
 168
 169 struct compat_iovec {
 170         compat_uptr_t   iov_base;
 171         compat_size_t   iov_len;
 172 };
 173
 174 struct compat_rlimit {
 175         compat_ulong_t  rlim_cur;
 176         compat_ulong_t  rlim_max;
 177 };
 178
 179 struct compat_rusage {
 180         struct compat_timeval ru_utime;
 181         struct compat_timeval ru_stime;
 182         compat_long_t   ru_maxrss;
 183         compat_long_t   ru_ixrss;
 184         compat_long_t   ru_idrss;
 185         compat_long_t   ru_isrss;
 186         compat_long_t   ru_minflt;
 187         compat_long_t   ru_majflt;
 188         compat_long_t   ru_nswap;
 189         compat_long_t   ru_inblock;
 190         compat_long_t   ru_oublock;
 191         compat_long_t   ru_msgsnd;
 192         compat_long_t   ru_msgrcv;
 193         compat_long_t   ru_nsignals;
 194         compat_long_t   ru_nvcsw;
 195         compat_long_t   ru_nivcsw;
 196 };
 197
 198 extern int put_compat_rusage(const struct rusage *,
 199                              struct compat_rusage __user *);
 200
 201 struct compat_siginfo;
 202
 203 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 204                 struct compat_siginfo __user *, int,
 205                 struct compat_rusage __user *);
 206
 207 struct compat_dirent {
 208         u32             d_ino;
 209         compat_off_t    d_off;
 210         u16             d_reclen;
 211         char            d_name[256];
 212 };
 213
 214 struct compat_ustat {
 215         compat_daddr_t          f_tfree;
 216         compat_ino_t            f_tinode;
 217         char                    f_fname[6];
 218         char                    f_fpack[6];
 219 };
 220
 221 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 222
 223 typedef struct compat_sigevent {
 224         compat_sigval_t sigev_value;
 225         compat_int_t sigev_signo;
 226         compat_int_t sigev_notify;
 227         union {
 228                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 229                 compat_int_t _tid;
 230
 231                 struct {
 232                         compat_uptr_t _function;
 233                         compat_uptr_t _attribute;
 234                 } _sigev_thread;
 235         } _sigev_un;
 236 } compat_sigevent_t;
 237
 238 struct compat_ifmap {
 239         compat_ulong_t mem_start;
 240         compat_ulong_t mem_end;
 241         unsigned short base_addr;
 242         unsigned char irq;
 243         unsigned char dma;
 244         unsigned char port;
 245 };
 246
 247 struct compat_if_settings {
 248         unsigned int type;      /* Type of physical device or protocol */
 249         unsigned int size;      /* Size of the data allocated by the caller */
 250         compat_uptr_t ifs_ifsu; /* union of pointers */
 251 };
 252
 253 struct compat_ifreq {
 254         union {
 255                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 256         } ifr_ifrn;
 257         union {
 258                 struct  sockaddr ifru_addr;
 259                 struct  sockaddr ifru_dstaddr;
 260                 struct  sockaddr ifru_broadaddr;
 261                 struct  sockaddr ifru_netmask;
 262                 struct  sockaddr ifru_hwaddr;
 263                 short   ifru_flags;
 264                 compat_int_t    ifru_ivalue;
 265                 compat_int_t    ifru_mtu;
 266                 struct  compat_ifmap ifru_map;
 267                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 268                 char    ifru_newname[IFNAMSIZ];
 269                 compat_caddr_t  ifru_data;
 270                 struct  compat_if_settings ifru_settings;
 271         } ifr_ifru;
 272 };
 273
 274 struct compat_ifconf {
 275         compat_int_t    ifc_len;                /* size of buffer */
 276         compat_caddr_t  ifcbuf;
 277 };
 278
 279 struct compat_robust_list {
 280         compat_uptr_t                   next;
 281 };
 282
 283 struct compat_robust_list_head {
 284         struct compat_robust_list       list;
 285         compat_long_t                   futex_offset;
 286         compat_uptr_t                   list_op_pending;
 287 };
 288
 289 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 290 struct compat_old_sigaction {
 291         compat_uptr_t                   sa_handler;
 292         compat_old_sigset_t             sa_mask;
 293         compat_ulong_t                  sa_flags;
 294         compat_uptr_t                   sa_restorer;
 295 };
 296 #endif
 297
 298 struct compat_statfs;
 299 struct compat_statfs64;
 300 struct compat_old_linux_dirent;
 301 struct compat_linux_dirent;
 302 struct linux_dirent64;
 303 struct compat_msghdr;
 304 struct compat_mmsghdr;
 305 struct compat_sysinfo;
 306 struct compat_sysctl_args;
 307 struct compat_kexec_segment;
 308 struct compat_mq_attr;
 309 struct compat_msgbuf;
 310
 311 extern void compat_exit_robust_list(struct task_struct *curr);
 312
 313 asmlinkage long
 314 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 315                            compat_size_t len);
 316 asmlinkage long
 317 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 318                            compat_size_t __user *len_ptr);
 319
 320 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
 321 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 322 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 323 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 324                 compat_ssize_t msgsz, int msgflg);
 325 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
 326                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
 327 long compat_sys_msgctl(int first, int second, void __user *uptr);
 328 long compat_sys_shmctl(int first, int second, void __user *uptr);
 329 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 330                 unsigned nsems, const struct compat_timespec __user *timeout);
 331 asmlinkage long compat_sys_keyctl(u32 option,
 332                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 333 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 334
 335 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
 336                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 337 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
 338                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 339 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 340                 const struct compat_iovec __user *vec,
 341                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 342 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 343                 const struct compat_iovec __user *vec,
 344                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 345 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
 346                 const struct compat_iovec __user *vec,
 347                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, int flags);
 348 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
 349                 const struct compat_iovec __user *vec,
 350                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, int flags);
 351
 352 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
 353 asmlinkage long compat_sys_preadv64(unsigned long fd,
 354                 const struct compat_iovec __user *vec,
 355                 unsigned long vlen, loff_t pos);
 356 #endif
 357
 358 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
 359 asmlinkage long compat_sys_pwritev64(unsigned long fd,
 360                 const struct compat_iovec __user *vec,
 361                 unsigned long vlen, loff_t pos);
 362 #endif
 363
 364 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 365
 366 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 367                      const compat_uptr_t __user *envp);
 368 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
 369                      const compat_uptr_t __user *argv,
 370                      const compat_uptr_t __user *envp, int flags);
 371
 372 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 373                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 374                 struct compat_timeval __user *tvp);
 375
 376 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 377
 378 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 379                                  compat_uint_t __user *stat_addr, int options,
 380                                  struct compat_rusage __user *ru);
 381
 382 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 383
 384 #define BITS_TO_COMPAT_LONGS(bits) \
 385         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 386
 387 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 388                        unsigned long bitmap_size);
 389 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 390                        unsigned long bitmap_size);
 391 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 392 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
 393 int get_compat_sigevent(struct sigevent *event,
 394                 const struct compat_sigevent __user *u_event);
 395 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 396                                   struct compat_siginfo __user *uinfo);
 397 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 398 asmlinkage long compat_sys_sigaction(int sig,
 399                                    const struct compat_old_sigaction __user *act,
 400                                    struct compat_old_sigaction __user *oact);
 401 #endif
 402
 403 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 404                                         struct compat_timeval *rhs)
 405 {
 406         if (lhs->tv_sec < rhs->tv_sec)
 407                 return -1;
 408         if (lhs->tv_sec > rhs->tv_sec)
 409                 return 1;
 410         return lhs->tv_usec - rhs->tv_usec;
 411 }
 412
 413 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 414                                         struct compat_timespec *rhs)
 415 {
 416         if (lhs->tv_sec < rhs->tv_sec)
 417                 return -1;
 418         if (lhs->tv_sec > rhs->tv_sec)
 419                 return 1;
 420         return lhs->tv_nsec - rhs->tv_nsec;
 421 }
 422
 423 extern int get_compat_itimerspec(struct itimerspec *dst,
 424                                  const struct compat_itimerspec __user *src);
 425 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 426                                  const struct itimerspec *src);
 427
 428 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 429                 struct timezone __user *tz);
 430 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 431                 struct timezone __user *tz);
 432
 433 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 434
 435 extern __printf(1, 2) int compat_printk(const char *fmt, ...);
 436 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
 437 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
 438
 439 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 440                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 441                 const compat_ulong_t __user *new_nodes);
 442
 443 extern int compat_ptrace_request(struct task_struct *child,
 444                                  compat_long_t request,
 445                                  compat_ulong_t addr, compat_ulong_t data);
 446
 447 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 448                                compat_ulong_t addr, compat_ulong_t data);
 449 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 450                                   compat_long_t addr, compat_long_t data);
 451
 452 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 453 /*
 454  * epoll (fs/eventpoll.c) compat bits follow ...
 455  */
 456 struct epoll_event;     /* fortunately, this one is fixed-layout */
 457 asmlinkage long compat_sys_epoll_pwait(int epfd,
 458                         struct epoll_event __user *events,
 459                         int maxevents, int timeout,
 460                         const compat_sigset_t __user *sigmask,
 461                         compat_size_t sigsetsize);
 462
 463 asmlinkage long compat_sys_utime(const char __user *filename,
 464                                  struct compat_utimbuf __user *t);
 465 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 466                                      const char __user *filename,
 467                                      struct compat_timespec __user *t,
 468                                      int flags);
 469
 470 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
 471 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
 472 asmlinkage long compat_sys_signalfd(int ufd,
 473                                     const compat_sigset_t __user *sigmask,
 474                                     compat_size_t sigsetsize);
 475 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 476                                    const struct compat_itimerspec __user *utmr,
 477                                    struct compat_itimerspec __user *otmr);
 478 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 479                                    struct compat_itimerspec __user *otmr);
 480
 481 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
 482                                       __u32 __user *pages,
 483                                       const int __user *nodes,
 484                                       int __user *status,
 485                                       int flags);
 486 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 487                                      const char __user *filename,
 488                                      struct compat_timeval __user *t);
 489 asmlinkage long compat_sys_utimes(const char __user *filename,
 490                                   struct compat_timeval __user *t);
 491 asmlinkage long compat_sys_newstat(const char __user *filename,
 492                                    struct compat_stat __user *statbuf);
 493 asmlinkage long compat_sys_newlstat(const char __user *filename,
 494                                     struct compat_stat __user *statbuf);
 495 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 496                                       const char __user *filename,
 497                                       struct compat_stat __user *statbuf,
 498                                       int flag);
 499 asmlinkage long compat_sys_newfstat(unsigned int fd,
 500                                     struct compat_stat __user *statbuf);
 501 asmlinkage long compat_sys_statfs(const char __user *pathname,
 502                                   struct compat_statfs __user *buf);
 503 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 504                                    struct compat_statfs __user *buf);
 505 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 506                                     compat_size_t sz,
 507                                     struct compat_statfs64 __user *buf);
 508 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 509                                      struct compat_statfs64 __user *buf);
 510 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 511                                    compat_ulong_t arg);
 512 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 513                                  compat_ulong_t arg);
 514 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 515 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
 516                                         compat_long_t min_nr,
 517                                         compat_long_t nr,
 518                                         struct io_event __user *events,
 519                                         struct compat_timespec __user *timeout);
 520 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 521                                      u32 __user *iocb);
 522 asmlinkage long compat_sys_mount(const char __user *dev_name,
 523                                  const char __user *dir_name,
 524                                  const char __user *type, compat_ulong_t flags,
 525                                  const void __user *data);
 526 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 527                                        struct compat_old_linux_dirent __user *,
 528                                        unsigned int count);
 529 asmlinkage long compat_sys_getdents(unsigned int fd,
 530                                     struct compat_linux_dirent __user *dirent,
 531                                     unsigned int count);
 532 #ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
 533 asmlinkage long compat_sys_getdents64(unsigned int fd,
 534                                       struct linux_dirent64 __user *dirent,
 535                                       unsigned int count);
 536 #endif
 537 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 538                                     unsigned int nr_segs, unsigned int flags);
 539 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 540                                 umode_t mode);
 541 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 542                                   int flags, umode_t mode);
 543 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 544                                              struct file_handle __user *handle,
 545                                              int flags);
 546 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 547 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 548 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 549                                     compat_ulong_t __user *outp,
 550                                     compat_ulong_t __user *exp,
 551                                     struct compat_timespec __user *tsp,
 552                                     void __user *sig);
 553 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 554                                  unsigned int nfds,
 555                                  struct compat_timespec __user *tsp,
 556                                  const compat_sigset_t __user *sigmask,
 557                                  compat_size_t sigsetsize);
 558 asmlinkage long compat_sys_signalfd4(int ufd,
 559                                      const compat_sigset_t __user *sigmask,
 560                                      compat_size_t sigsetsize, int flags);
 561 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 562                                          compat_ulong_t __user *nmask,
 563                                          compat_ulong_t maxnode,
 564                                          compat_ulong_t addr,
 565                                          compat_ulong_t flags);
 566 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 567                                          compat_ulong_t maxnode);
 568 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 569                                  compat_ulong_t mode,
 570                                  compat_ulong_t __user *nmask,
 571                                  compat_ulong_t maxnode, compat_ulong_t flags);
 572
 573 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 574                                       char __user *optval, unsigned int optlen);
 575 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 576                                    unsigned flags);
 577 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 578                                     unsigned vlen, unsigned int flags);
 579 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 580                                    unsigned int flags);
 581 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
 582                                 unsigned flags);
 583 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
 584                             unsigned flags, struct sockaddr __user *addr,
 585                             int __user *addrlen);
 586 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 587                                     unsigned vlen, unsigned int flags,
 588                                     struct compat_timespec __user *timeout);
 589 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
 590                                      struct compat_timespec __user *rmtp);
 591 asmlinkage long compat_sys_getitimer(int which,
 592                                      struct compat_itimerval __user *it);
 593 asmlinkage long compat_sys_setitimer(int which,
 594                                      struct compat_itimerval __user *in,
 595                                      struct compat_itimerval __user *out);
 596 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 597 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 598                                      struct compat_rlimit __user *rlim);
 599 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 600                                      struct compat_rlimit __user *rlim);
 601 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 602 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 603                                      unsigned int len,
 604                                      compat_ulong_t __user *user_mask_ptr);
 605 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 606                                      unsigned int len,
 607                                      compat_ulong_t __user *user_mask_ptr);
 608 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 609                         struct compat_sigevent __user *timer_event_spec,
 610                         timer_t __user *created_timer_id);
 611 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 612                                          struct compat_itimerspec __user *new,
 613                                          struct compat_itimerspec __user *old);
 614 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 615                                  struct compat_itimerspec __user *setting);
 616 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 617                                          struct compat_timespec __user *tp);
 618 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 619                                          struct compat_timespec __user *tp);
 620 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 621                                          struct compat_timex __user *tp);
 622 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 623                                         struct compat_timespec __user *tp);
 624 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 625                                            struct compat_timespec __user *rqtp,
 626                                            struct compat_timespec __user *rmtp);
 627 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 628                 struct compat_siginfo __user *uinfo,
 629                 struct compat_timespec __user *uts, compat_size_t sigsetsize);
 630 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 631                                          compat_size_t sigsetsize);
 632 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 633                                           compat_sigset_t __user *oset,
 634                                           compat_size_t sigsetsize);
 635 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 636                                          compat_size_t sigsetsize);
 637 #ifndef CONFIG_ODD_RT_SIGACTION
 638 asmlinkage long compat_sys_rt_sigaction(int,
 639                                  const struct compat_sigaction __user *,
 640                                  struct compat_sigaction __user *,
 641                                  compat_size_t);
 642 #endif
 643 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 644                                 struct compat_siginfo __user *uinfo);
 645 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 646 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 647                                  compat_ulong_t arg);
 648 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 649                 struct compat_timespec __user *utime, u32 __user *uaddr2,
 650                 u32 val3);
 651 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 652                                       char __user *optval, int __user *optlen);
 653 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
 654                                       compat_ulong_t nr_segments,
 655                                       struct compat_kexec_segment __user *,
 656                                       compat_ulong_t flags);
 657 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 658                         const struct compat_mq_attr __user *u_mqstat,
 659                         struct compat_mq_attr __user *u_omqstat);
 660 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 661                         const struct compat_sigevent __user *u_notification);
 662 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 663                         int oflag, compat_mode_t mode,
 664                         struct compat_mq_attr __user *u_attr);
 665 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 666                         const char __user *u_msg_ptr,
 667                         compat_size_t msg_len, unsigned int msg_prio,
 668                         const struct compat_timespec __user *u_abs_timeout);
 669 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 670                         char __user *u_msg_ptr,
 671                         compat_size_t msg_len, unsigned int __user *u_msg_prio,
 672                         const struct compat_timespec __user *u_abs_timeout);
 673 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 674 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 675
 676 extern ssize_t compat_rw_copy_check_uvector(int type,
 677                 const struct compat_iovec __user *uvector,
 678                 unsigned long nr_segs,
 679                 unsigned long fast_segs, struct iovec *fast_pointer,
 680                 struct iovec **ret_pointer);
 681
 682 extern void __user *compat_alloc_user_space(unsigned long len);
 683
 684 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 685                 const struct compat_iovec __user *lvec,
 686                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 687                 compat_ulong_t riovcnt, compat_ulong_t flags);
 688 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 689                 const struct compat_iovec __user *lvec,
 690                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 691                 compat_ulong_t riovcnt, compat_ulong_t flags);
 692
 693 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 694                                     compat_off_t __user *offset, compat_size_t count);
 695 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 696                                     compat_loff_t __user *offset, compat_size_t count);
 697 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 698                                        compat_stack_t __user *uoss_ptr);
 699
 700 #ifdef __ARCH_WANT_SYS_SIGPENDING
 701 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
 702 #endif
 703
 704 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
 705 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
 706                                        compat_old_sigset_t __user *oset);
 707 #endif
 708
 709 int compat_restore_altstack(const compat_stack_t __user *uss);
 710 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 711 #define compat_save_altstack_ex(uss, sp) do { \
 712         compat_stack_t __user *__uss = uss; \
 713         struct task_struct *t = current; \
 714         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
 715         put_user_ex(sas_ss_flags(sp), &__uss->ss_flags); \
 716         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
 717 } while (0);
 718
 719 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 720                                                  struct compat_timespec __user *interval);
 721
 722 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 723                                             int, const char __user *);
 724
 725 /*
 726  * For most but not all architectures, "am I in a compat syscall?" and
 727  * "am I a compat task?" are the same question.  For architectures on which
 728  * they aren't the same question, arch code can override in_compat_syscall.
 729  */
 730
 731 #ifndef in_compat_syscall
 732 static inline bool in_compat_syscall(void) { return is_compat_task(); }
 733 #endif
 734
 735 #else
 736
 737 #define is_compat_task() (0)
 738 static inline bool in_compat_syscall(void) { return false; }
 739
 740 #endif /* CONFIG_COMPAT */
 741
 742 #endif /* _LINUX_COMPAT_H */