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
  17 #define compat_jiffies_to_clock_t(x)    \
  18                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  19
  20 typedef __compat_uid32_t        compat_uid_t;
  21 typedef __compat_gid32_t        compat_gid_t;
  22
  23 struct rusage;
  24
  25 struct compat_itimerspec {
  26         struct compat_timespec it_interval;
  27         struct compat_timespec it_value;
  28 };
  29
  30 struct compat_utimbuf {
  31         compat_time_t           actime;
  32         compat_time_t           modtime;
  33 };
  34
  35 struct compat_itimerval {
  36         struct compat_timeval   it_interval;
  37         struct compat_timeval   it_value;
  38 };
  39
  40 struct compat_tms {
  41         compat_clock_t          tms_utime;
  42         compat_clock_t          tms_stime;
  43         compat_clock_t          tms_cutime;
  44         compat_clock_t          tms_cstime;
  45 };
  46
  47 struct compat_timex {
  48         compat_uint_t modes;
  49         compat_long_t offset;
  50         compat_long_t freq;
  51         compat_long_t maxerror;
  52         compat_long_t esterror;
  53         compat_int_t status;
  54         compat_long_t constant;
  55         compat_long_t precision;
  56         compat_long_t tolerance;
  57         struct compat_timeval time;
  58         compat_long_t tick;
  59         compat_long_t ppsfreq;
  60         compat_long_t jitter;
  61         compat_int_t shift;
  62         compat_long_t stabil;
  63         compat_long_t jitcnt;
  64         compat_long_t calcnt;
  65         compat_long_t errcnt;
  66         compat_long_t stbcnt;
  67
  68         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  69         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  70         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  71 };
  72
  73 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
  74
  75 typedef struct {
  76         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
  77 } compat_sigset_t;
  78
  79 extern int cp_compat_stat(struct kstat *, struct compat_stat __user *);
  80 extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
  81 extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
  82
  83 struct compat_iovec {
  84         compat_uptr_t   iov_base;
  85         compat_size_t   iov_len;
  86 };
  87
  88 struct compat_rlimit {
  89         compat_ulong_t  rlim_cur;
  90         compat_ulong_t  rlim_max;
  91 };
  92
  93 struct compat_rusage {
  94         struct compat_timeval ru_utime;
  95         struct compat_timeval ru_stime;
  96         compat_long_t   ru_maxrss;
  97         compat_long_t   ru_ixrss;
  98         compat_long_t   ru_idrss;
  99         compat_long_t   ru_isrss;
 100         compat_long_t   ru_minflt;
 101         compat_long_t   ru_majflt;
 102         compat_long_t   ru_nswap;
 103         compat_long_t   ru_inblock;
 104         compat_long_t   ru_oublock;
 105         compat_long_t   ru_msgsnd;
 106         compat_long_t   ru_msgrcv;
 107         compat_long_t   ru_nsignals;
 108         compat_long_t   ru_nvcsw;
 109         compat_long_t   ru_nivcsw;
 110 };
 111
 112 extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
 113
 114 struct compat_siginfo;
 115
 116 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 117                 struct compat_siginfo __user *, int,
 118                 struct compat_rusage __user *);
 119
 120 struct compat_dirent {
 121         u32             d_ino;
 122         compat_off_t    d_off;
 123         u16             d_reclen;
 124         char            d_name[256];
 125 };
 126
 127 typedef union compat_sigval {
 128         compat_int_t    sival_int;
 129         compat_uptr_t   sival_ptr;
 130 } compat_sigval_t;
 131
 132 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 133
 134 typedef struct compat_sigevent {
 135         compat_sigval_t sigev_value;
 136         compat_int_t sigev_signo;
 137         compat_int_t sigev_notify;
 138         union {
 139                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 140                 compat_int_t _tid;
 141
 142                 struct {
 143                         compat_uptr_t _function;
 144                         compat_uptr_t _attribute;
 145                 } _sigev_thread;
 146         } _sigev_un;
 147 } compat_sigevent_t;
 148
 149 struct compat_robust_list {
 150         compat_uptr_t                   next;
 151 };
 152
 153 struct compat_robust_list_head {
 154         struct compat_robust_list       list;
 155         compat_long_t                   futex_offset;
 156         compat_uptr_t                   list_op_pending;
 157 };
 158
 159 extern void compat_exit_robust_list(struct task_struct *curr);
 160
 161 asmlinkage long
 162 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 163                            compat_size_t len);
 164 asmlinkage long
 165 compat_sys_get_robust_list(int pid, compat_uptr_t *head_ptr,
 166                            compat_size_t __user *len_ptr);
 167
 168 long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 169 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 170 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 171                 int version, void __user *uptr);
 172 long compat_sys_msgctl(int first, int second, void __user *uptr);
 173 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 174                 void __user *uptr);
 175 long compat_sys_shmctl(int first, int second, void __user *uptr);
 176 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 177                 unsigned nsems, const struct compat_timespec __user *timeout);
 178 asmlinkage long compat_sys_keyctl(u32 option,
 179                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 180
 181 asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 182                 const struct compat_iovec __user *vec, unsigned long vlen);
 183 asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 184                 const struct compat_iovec __user *vec, unsigned long vlen);
 185
 186 int compat_do_execve(char * filename, compat_uptr_t __user *argv,
 187                 compat_uptr_t __user *envp, struct pt_regs * regs);
 188
 189 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 190                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 191                 struct compat_timeval __user *tvp);
 192
 193 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 194
 195 #define BITS_TO_COMPAT_LONGS(bits) \
 196         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 197
 198 long compat_get_bitmap(unsigned long *mask, compat_ulong_t __user *umask,
 199                        unsigned long bitmap_size);
 200 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 201                        unsigned long bitmap_size);
 202 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 203 int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 204 int get_compat_sigevent(struct sigevent *event,
 205                 const struct compat_sigevent __user *u_event);
 206
 207 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 208                                         struct compat_timeval *rhs)
 209 {
 210         if (lhs->tv_sec < rhs->tv_sec)
 211                 return -1;
 212         if (lhs->tv_sec > rhs->tv_sec)
 213                 return 1;
 214         return lhs->tv_usec - rhs->tv_usec;
 215 }
 216
 217 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 218                                         struct compat_timespec *rhs)
 219 {
 220         if (lhs->tv_sec < rhs->tv_sec)
 221                 return -1;
 222         if (lhs->tv_sec > rhs->tv_sec)
 223                 return 1;
 224         return lhs->tv_nsec - rhs->tv_nsec;
 225 }
 226
 227 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 228
 229 extern int compat_printk(const char *fmt, ...);
 230
 231 #endif /* CONFIG_COMPAT */
 232 #endif /* _LINUX_COMPAT_H */