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