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
  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
  21 typedef __compat_uid32_t        compat_uid_t;
  22 typedef __compat_gid32_t        compat_gid_t;
  23
  24 struct rusage;
  25
  26 struct compat_itimerspec {
  27         struct compat_timespec it_interval;
  28         struct compat_timespec it_value;
  29 };
  30
  31 struct compat_utimbuf {
  32         compat_time_t           actime;
  33         compat_time_t           modtime;
  34 };
  35
  36 struct compat_itimerval {
  37         struct compat_timeval   it_interval;
  38         struct compat_timeval   it_value;
  39 };
  40
  41 struct 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
  48 struct 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
  77 typedef struct {
  78         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
  79 } compat_sigset_t;
  80
  81 extern int cp_compat_stat(struct kstat *, struct compat_stat __user *);
  82 extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
  83 extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
  84
  85 struct compat_iovec {
  86         compat_uptr_t   iov_base;
  87         compat_size_t   iov_len;
  88 };
  89
  90 struct compat_rlimit {
  91         compat_ulong_t  rlim_cur;
  92         compat_ulong_t  rlim_max;
  93 };
  94
  95 struct compat_rusage {
  96         struct compat_timeval ru_utime;
  97         struct compat_timeval ru_stime;
  98         compat_long_t   ru_maxrss;
  99         compat_long_t   ru_ixrss;
 100         compat_long_t   ru_idrss;
 101         compat_long_t   ru_isrss;
 102         compat_long_t   ru_minflt;
 103         compat_long_t   ru_majflt;
 104         compat_long_t   ru_nswap;
 105         compat_long_t   ru_inblock;
 106         compat_long_t   ru_oublock;
 107         compat_long_t   ru_msgsnd;
 108         compat_long_t   ru_msgrcv;
 109         compat_long_t   ru_nsignals;
 110         compat_long_t   ru_nvcsw;
 111         compat_long_t   ru_nivcsw;
 112 };
 113
 114 extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
 115
 116 struct compat_siginfo;
 117
 118 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 119                 struct compat_siginfo __user *, int,
 120                 struct compat_rusage __user *);
 121
 122 struct compat_dirent {
 123         u32             d_ino;
 124         compat_off_t    d_off;
 125         u16             d_reclen;
 126         char            d_name[256];
 127 };
 128
 129 typedef union compat_sigval {
 130         compat_int_t    sival_int;
 131         compat_uptr_t   sival_ptr;
 132 } compat_sigval_t;
 133
 134 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 135
 136 typedef struct compat_sigevent {
 137         compat_sigval_t sigev_value;
 138         compat_int_t sigev_signo;
 139         compat_int_t sigev_notify;
 140         union {
 141                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 142                 compat_int_t _tid;
 143
 144                 struct {
 145                         compat_uptr_t _function;
 146                         compat_uptr_t _attribute;
 147                 } _sigev_thread;
 148         } _sigev_un;
 149 } compat_sigevent_t;
 150
 151 struct compat_robust_list {
 152         compat_uptr_t                   next;
 153 };
 154
 155 struct compat_robust_list_head {
 156         struct compat_robust_list       list;
 157         compat_long_t                   futex_offset;
 158         compat_uptr_t                   list_op_pending;
 159 };
 160
 161 extern void compat_exit_robust_list(struct task_struct *curr);
 162
 163 asmlinkage long
 164 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 165                            compat_size_t len);
 166 asmlinkage long
 167 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 168                            compat_size_t __user *len_ptr);
 169
 170 long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 171 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 172 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 173                 int version, void __user *uptr);
 174 long compat_sys_msgctl(int first, int second, void __user *uptr);
 175 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 176                 void __user *uptr);
 177 long compat_sys_shmctl(int first, int second, void __user *uptr);
 178 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 179                 unsigned nsems, const struct compat_timespec __user *timeout);
 180 asmlinkage long compat_sys_keyctl(u32 option,
 181                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 182
 183 asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 184                 const struct compat_iovec __user *vec, unsigned long vlen);
 185 asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 186                 const struct compat_iovec __user *vec, unsigned long vlen);
 187
 188 int compat_do_execve(char * filename, compat_uptr_t __user *argv,
 189                 compat_uptr_t __user *envp, struct pt_regs * regs);
 190
 191 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 192                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 193                 struct compat_timeval __user *tvp);
 194
 195 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 196                                  compat_uint_t __user *stat_addr, int options,
 197                                  struct compat_rusage __user *ru);
 198
 199 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 200
 201 #define BITS_TO_COMPAT_LONGS(bits) \
 202         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 203
 204 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 205                        unsigned long bitmap_size);
 206 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 207                        unsigned long bitmap_size);
 208 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 209 int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 210 int get_compat_sigevent(struct sigevent *event,
 211                 const struct compat_sigevent __user *u_event);
 212
 213 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 214                                         struct compat_timeval *rhs)
 215 {
 216         if (lhs->tv_sec < rhs->tv_sec)
 217                 return -1;
 218         if (lhs->tv_sec > rhs->tv_sec)
 219                 return 1;
 220         return lhs->tv_usec - rhs->tv_usec;
 221 }
 222
 223 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 224                                         struct compat_timespec *rhs)
 225 {
 226         if (lhs->tv_sec < rhs->tv_sec)
 227                 return -1;
 228         if (lhs->tv_sec > rhs->tv_sec)
 229                 return 1;
 230         return lhs->tv_nsec - rhs->tv_nsec;
 231 }
 232
 233 extern int get_compat_itimerspec(struct itimerspec *dst,
 234                                  const struct compat_itimerspec __user *src);
 235 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 236                                  const struct itimerspec *src);
 237
 238 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 239
 240 extern int compat_printk(const char *fmt, ...);
 241 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
 242
 243 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 244                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 245                 const compat_ulong_t __user *new_nodes);
 246
 247 extern int compat_ptrace_request(struct task_struct *child,
 248                                  compat_long_t request,
 249                                  compat_ulong_t addr, compat_ulong_t data);
 250
 251 #ifdef __ARCH_WANT_COMPAT_SYS_PTRACE
 252 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 253                                compat_ulong_t addr, compat_ulong_t data);
 254 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 255                                   compat_long_t addr, compat_long_t data);
 256 #endif  /* __ARCH_WANT_COMPAT_SYS_PTRACE */
 257
 258 /*
 259  * epoll (fs/eventpoll.c) compat bits follow ...
 260  */
 261 struct epoll_event;
 262 #define compat_epoll_event      epoll_event
 263 asmlinkage long compat_sys_epoll_pwait(int epfd,
 264                         struct compat_epoll_event __user *events,
 265                         int maxevents, int timeout,
 266                         const compat_sigset_t __user *sigmask,
 267                         compat_size_t sigsetsize);
 268
 269 asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
 270                                 struct compat_timespec __user *t, int flags);
 271
 272 asmlinkage long compat_sys_signalfd(int ufd,
 273                                 const compat_sigset_t __user *sigmask,
 274                                 compat_size_t sigsetsize);
 275 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 276                                    const struct compat_itimerspec __user *utmr,
 277                                    struct compat_itimerspec __user *otmr);
 278 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 279                                    struct compat_itimerspec __user *otmr);
 280
 281 #endif /* CONFIG_COMPAT */
 282 #endif /* _LINUX_COMPAT_H */