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
  14#include <asm/compat.h>
  15#include <asm/siginfo.h>
  16#include <asm/signal.h>
  17
  18#define compat_jiffies_to_clock_t(x)    \
  19                (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  20
  21typedef __compat_uid32_t        compat_uid_t;
  22typedef __compat_gid32_t        compat_gid_t;
  23
  24struct rusage;
  25
  26struct compat_itimerspec { 
  27        struct compat_timespec it_interval;
  28        struct compat_timespec it_value;
  29};
  30
  31struct compat_utimbuf {
  32        compat_time_t           actime;
  33        compat_time_t           modtime;
  34};
  35
  36struct compat_itimerval {
  37        struct compat_timeval   it_interval;
  38        struct compat_timeval   it_value;
  39};
  40
  41struct compat_tms {
  42        compat_clock_t          tms_utime;
  43        compat_clock_t          tms_stime;
  44        compat_clock_t          tms_cutime;
  45        compat_clock_t          tms_cstime;
  46};
  47
  48struct compat_timex {
  49        compat_uint_t modes;
  50        compat_long_t offset;
  51        compat_long_t freq;
  52        compat_long_t maxerror;
  53        compat_long_t esterror;
  54        compat_int_t status;
  55        compat_long_t constant;
  56        compat_long_t precision;
  57        compat_long_t tolerance;
  58        struct compat_timeval time;
  59        compat_long_t tick;
  60        compat_long_t ppsfreq;
  61        compat_long_t jitter;
  62        compat_int_t shift;
  63        compat_long_t stabil;
  64        compat_long_t jitcnt;
  65        compat_long_t calcnt;
  66        compat_long_t errcnt;
  67        compat_long_t stbcnt;
  68        compat_int_t tai;
  69
  70        compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  71        compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  72        compat_int_t :32; compat_int_t :32; compat_int_t :32;
  73};
  74
  75#define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
  76
  77typedef struct {
  78        compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
  79} compat_sigset_t;
  80
  81extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
  82extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
  83
  84struct compat_iovec {
  85        compat_uptr_t   iov_base;
  86        compat_size_t   iov_len;
  87};
  88
  89struct compat_rlimit {
  90        compat_ulong_t  rlim_cur;
  91        compat_ulong_t  rlim_max;
  92};
  93
  94struct compat_rusage {
  95        struct compat_timeval ru_utime;
  96        struct compat_timeval ru_stime;
  97        compat_long_t   ru_maxrss;
  98        compat_long_t   ru_ixrss;
  99        compat_long_t   ru_idrss;
 100        compat_long_t   ru_isrss;
 101        compat_long_t   ru_minflt;
 102        compat_long_t   ru_majflt;
 103        compat_long_t   ru_nswap;
 104        compat_long_t   ru_inblock;
 105        compat_long_t   ru_oublock;
 106        compat_long_t   ru_msgsnd;
 107        compat_long_t   ru_msgrcv;
 108        compat_long_t   ru_nsignals;
 109        compat_long_t   ru_nvcsw;
 110        compat_long_t   ru_nivcsw;
 111};
 112
 113extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
 114
 115struct compat_siginfo;
 116
 117extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 118                struct compat_siginfo __user *, int,
 119                struct compat_rusage __user *);
 120
 121struct compat_dirent {
 122        u32             d_ino;
 123        compat_off_t    d_off;
 124        u16             d_reclen;
 125        char            d_name[256];
 126};
 127
 128struct compat_ustat {
 129        compat_daddr_t          f_tfree;
 130        compat_ino_t            f_tinode;
 131        char                    f_fname[6];
 132        char                    f_fpack[6];
 133};
 134
 135typedef union compat_sigval {
 136        compat_int_t    sival_int;
 137        compat_uptr_t   sival_ptr;
 138} compat_sigval_t;
 139
 140#define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 141
 142typedef struct compat_sigevent {
 143        compat_sigval_t sigev_value;
 144        compat_int_t sigev_signo;
 145        compat_int_t sigev_notify;
 146        union {
 147                compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 148                compat_int_t _tid;
 149
 150                struct {
 151                        compat_uptr_t _function;
 152                        compat_uptr_t _attribute;
 153                } _sigev_thread;
 154        } _sigev_un;
 155} compat_sigevent_t;
 156
 157struct compat_robust_list {
 158        compat_uptr_t                   next;
 159};
 160
 161struct compat_robust_list_head {
 162        struct compat_robust_list       list;
 163        compat_long_t                   futex_offset;
 164        compat_uptr_t                   list_op_pending;
 165};
 166
 167extern void compat_exit_robust_list(struct task_struct *curr);
 168
 169asmlinkage long
 170compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 171                           compat_size_t len);
 172asmlinkage long
 173compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 174                           compat_size_t __user *len_ptr);
 175
 176long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 177long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 178long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 179                int version, void __user *uptr);
 180long compat_sys_msgctl(int first, int second, void __user *uptr);
 181long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 182                void __user *uptr);
 183long compat_sys_shmctl(int first, int second, void __user *uptr);
 184long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 185                unsigned nsems, const struct compat_timespec __user *timeout);
 186asmlinkage long compat_sys_keyctl(u32 option,
 187                              u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 188asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 189
 190asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 191                const struct compat_iovec __user *vec, unsigned long vlen);
 192asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 193                const struct compat_iovec __user *vec, unsigned long vlen);
 194asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
 195                const struct compat_iovec __user *vec,
 196                unsigned long vlen, u32 pos_low, u32 pos_high);
 197asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
 198                const struct compat_iovec __user *vec,
 199                unsigned long vlen, u32 pos_low, u32 pos_high);
 200
 201int compat_do_execve(char * filename, compat_uptr_t __user *argv,
 202                compat_uptr_t __user *envp, struct pt_regs * regs);
 203
 204asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 205                compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 206                struct compat_timeval __user *tvp);
 207
 208asmlinkage long compat_sys_wait4(compat_pid_t pid,
 209                                 compat_uint_t __user *stat_addr, int options,
 210                                 struct compat_rusage __user *ru);
 211
 212#define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 213
 214#define BITS_TO_COMPAT_LONGS(bits) \
 215        (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 216
 217long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 218                       unsigned long bitmap_size);
 219long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 220                       unsigned long bitmap_size);
 221int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 222int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 223int get_compat_sigevent(struct sigevent *event,
 224                const struct compat_sigevent __user *u_event);
 225long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 226                                  struct compat_siginfo __user *uinfo);
 227
 228static inline int compat_timeval_compare(struct compat_timeval *lhs,
 229                                        struct compat_timeval *rhs)
 230{
 231        if (lhs->tv_sec < rhs->tv_sec)
 232                return -1;
 233        if (lhs->tv_sec > rhs->tv_sec)
 234                return 1;
 235        return lhs->tv_usec - rhs->tv_usec;
 236}
 237
 238static inline int compat_timespec_compare(struct compat_timespec *lhs,
 239                                        struct compat_timespec *rhs)
 240{
 241        if (lhs->tv_sec < rhs->tv_sec)
 242                return -1;
 243        if (lhs->tv_sec > rhs->tv_sec)
 244                return 1;
 245        return lhs->tv_nsec - rhs->tv_nsec;
 246}
 247
 248extern int get_compat_itimerspec(struct itimerspec *dst,
 249                                 const struct compat_itimerspec __user *src);
 250extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 251                                 const struct itimerspec *src);
 252
 253asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 254                struct timezone __user *tz);
 255asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 256                struct timezone __user *tz);
 257
 258asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 259
 260extern int compat_printk(const char *fmt, ...);
 261extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
 262
 263asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 264                compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 265                const compat_ulong_t __user *new_nodes);
 266
 267extern int compat_ptrace_request(struct task_struct *child,
 268                                 compat_long_t request,
 269                                 compat_ulong_t addr, compat_ulong_t data);
 270
 271extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 272                               compat_ulong_t addr, compat_ulong_t data);
 273asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 274                                  compat_long_t addr, compat_long_t data);
 275
 276/*
 277 * epoll (fs/eventpoll.c) compat bits follow ...
 278 */
 279struct epoll_event;
 280#define compat_epoll_event      epoll_event
 281asmlinkage long compat_sys_epoll_pwait(int epfd,
 282                        struct compat_epoll_event __user *events,
 283                        int maxevents, int timeout,
 284                        const compat_sigset_t __user *sigmask,
 285                        compat_size_t sigsetsize);
 286
 287asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
 288                                struct compat_timespec __user *t, int flags);
 289
 290asmlinkage long compat_sys_signalfd(int ufd,
 291                                const compat_sigset_t __user *sigmask,
 292                                compat_size_t sigsetsize);
 293asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 294                                   const struct compat_itimerspec __user *utmr,
 295                                   struct compat_itimerspec __user *otmr);
 296asmlinkage long compat_sys_timerfd_gettime(int ufd,
 297                                   struct compat_itimerspec __user *otmr);
 298
 299asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
 300                                      __u32 __user *pages,
 301                                      const int __user *nodes,
 302                                      int __user *status,
 303                                      int flags);
 304asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename,
 305                                     struct compat_timeval __user *t);
 306asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user * filename,
 307                                      struct compat_stat __user *statbuf,
 308                                      int flag);
 309asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename,
 310                                  int flags, int mode);
 311
 312#endif /* CONFIG_COMPAT */
 313#endif /* _LINUX_COMPAT_H */
 314