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 #include <linux/socket.h>
  14 #include <linux/if.h>
  15
  16 #include <asm/compat.h>
  17 #include <asm/siginfo.h>
  18 #include <asm/signal.h>
  19
  20 #define compat_jiffies_to_clock_t(x)    \
  21                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
  22
  23 typedef __compat_uid32_t        compat_uid_t;
  24 typedef __compat_gid32_t        compat_gid_t;
  25
  26 struct compat_sel_arg_struct;
  27 struct rusage;
  28
  29 struct compat_itimerspec {
  30         struct compat_timespec it_interval;
  31         struct compat_timespec it_value;
  32 };
  33
  34 struct compat_utimbuf {
  35         compat_time_t           actime;
  36         compat_time_t           modtime;
  37 };
  38
  39 struct compat_itimerval {
  40         struct compat_timeval   it_interval;
  41         struct compat_timeval   it_value;
  42 };
  43
  44 struct compat_tms {
  45         compat_clock_t          tms_utime;
  46         compat_clock_t          tms_stime;
  47         compat_clock_t          tms_cutime;
  48         compat_clock_t          tms_cstime;
  49 };
  50
  51 struct compat_timex {
  52         compat_uint_t modes;
  53         compat_long_t offset;
  54         compat_long_t freq;
  55         compat_long_t maxerror;
  56         compat_long_t esterror;
  57         compat_int_t status;
  58         compat_long_t constant;
  59         compat_long_t precision;
  60         compat_long_t tolerance;
  61         struct compat_timeval time;
  62         compat_long_t tick;
  63         compat_long_t ppsfreq;
  64         compat_long_t jitter;
  65         compat_int_t shift;
  66         compat_long_t stabil;
  67         compat_long_t jitcnt;
  68         compat_long_t calcnt;
  69         compat_long_t errcnt;
  70         compat_long_t stbcnt;
  71         compat_int_t tai;
  72
  73         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  74         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  75         compat_int_t :32; compat_int_t :32; compat_int_t :32;
  76 };
  77
  78 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
  79
  80 typedef struct {
  81         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
  82 } compat_sigset_t;
  83
  84 extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
  85 extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
  86
  87 struct compat_iovec {
  88         compat_uptr_t   iov_base;
  89         compat_size_t   iov_len;
  90 };
  91
  92 struct compat_rlimit {
  93         compat_ulong_t  rlim_cur;
  94         compat_ulong_t  rlim_max;
  95 };
  96
  97 struct compat_rusage {
  98         struct compat_timeval ru_utime;
  99         struct compat_timeval ru_stime;
 100         compat_long_t   ru_maxrss;
 101         compat_long_t   ru_ixrss;
 102         compat_long_t   ru_idrss;
 103         compat_long_t   ru_isrss;
 104         compat_long_t   ru_minflt;
 105         compat_long_t   ru_majflt;
 106         compat_long_t   ru_nswap;
 107         compat_long_t   ru_inblock;
 108         compat_long_t   ru_oublock;
 109         compat_long_t   ru_msgsnd;
 110         compat_long_t   ru_msgrcv;
 111         compat_long_t   ru_nsignals;
 112         compat_long_t   ru_nvcsw;
 113         compat_long_t   ru_nivcsw;
 114 };
 115
 116 extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
 117
 118 struct compat_siginfo;
 119
 120 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 121                 struct compat_siginfo __user *, int,
 122                 struct compat_rusage __user *);
 123
 124 struct compat_dirent {
 125         u32             d_ino;
 126         compat_off_t    d_off;
 127         u16             d_reclen;
 128         char            d_name[256];
 129 };
 130
 131 struct compat_ustat {
 132         compat_daddr_t          f_tfree;
 133         compat_ino_t            f_tinode;
 134         char                    f_fname[6];
 135         char                    f_fpack[6];
 136 };
 137
 138 typedef union compat_sigval {
 139         compat_int_t    sival_int;
 140         compat_uptr_t   sival_ptr;
 141 } compat_sigval_t;
 142
 143 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 144
 145 typedef struct compat_sigevent {
 146         compat_sigval_t sigev_value;
 147         compat_int_t sigev_signo;
 148         compat_int_t sigev_notify;
 149         union {
 150                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 151                 compat_int_t _tid;
 152
 153                 struct {
 154                         compat_uptr_t _function;
 155                         compat_uptr_t _attribute;
 156                 } _sigev_thread;
 157         } _sigev_un;
 158 } compat_sigevent_t;
 159
 160 struct compat_ifmap {
 161         compat_ulong_t mem_start;
 162         compat_ulong_t mem_end;
 163         unsigned short base_addr;
 164         unsigned char irq;
 165         unsigned char dma;
 166         unsigned char port;
 167 };
 168
 169 struct compat_if_settings
 170 {
 171         unsigned int type;      /* Type of physical device or protocol */
 172         unsigned int size;      /* Size of the data allocated by the caller */
 173         compat_uptr_t ifs_ifsu; /* union of pointers */
 174 };
 175
 176 struct compat_ifreq {
 177         union {
 178                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 179         } ifr_ifrn;
 180         union {
 181                 struct  sockaddr ifru_addr;
 182                 struct  sockaddr ifru_dstaddr;
 183                 struct  sockaddr ifru_broadaddr;
 184                 struct  sockaddr ifru_netmask;
 185                 struct  sockaddr ifru_hwaddr;
 186                 short   ifru_flags;
 187                 compat_int_t    ifru_ivalue;
 188                 compat_int_t    ifru_mtu;
 189                 struct  compat_ifmap ifru_map;
 190                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 191                 char    ifru_newname[IFNAMSIZ];
 192                 compat_caddr_t  ifru_data;
 193                 struct  compat_if_settings ifru_settings;
 194         } ifr_ifru;
 195 };
 196
 197 struct compat_ifconf {
 198         compat_int_t    ifc_len;                        /* size of buffer       */
 199         compat_caddr_t  ifcbuf;
 200 };
 201
 202 struct compat_robust_list {
 203         compat_uptr_t                   next;
 204 };
 205
 206 struct compat_robust_list_head {
 207         struct compat_robust_list       list;
 208         compat_long_t                   futex_offset;
 209         compat_uptr_t                   list_op_pending;
 210 };
 211
 212 extern void compat_exit_robust_list(struct task_struct *curr);
 213
 214 asmlinkage long
 215 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 216                            compat_size_t len);
 217 asmlinkage long
 218 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 219                            compat_size_t __user *len_ptr);
 220
 221 long compat_sys_semctl(int first, int second, int third, void __user *uptr);
 222 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
 223 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 224                 int version, void __user *uptr);
 225 long compat_sys_msgctl(int first, int second, void __user *uptr);
 226 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 227                 void __user *uptr);
 228 long compat_sys_shmctl(int first, int second, void __user *uptr);
 229 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 230                 unsigned nsems, const struct compat_timespec __user *timeout);
 231 asmlinkage long compat_sys_keyctl(u32 option,
 232                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 233 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 234
 235 asmlinkage ssize_t compat_sys_readv(unsigned long fd,
 236                 const struct compat_iovec __user *vec, unsigned long vlen);
 237 asmlinkage ssize_t compat_sys_writev(unsigned long fd,
 238                 const struct compat_iovec __user *vec, unsigned long vlen);
 239 asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
 240                 const struct compat_iovec __user *vec,
 241                 unsigned long vlen, u32 pos_low, u32 pos_high);
 242 asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
 243                 const struct compat_iovec __user *vec,
 244                 unsigned long vlen, u32 pos_low, u32 pos_high);
 245
 246 int compat_do_execve(char * filename, compat_uptr_t __user *argv,
 247                 compat_uptr_t __user *envp, struct pt_regs * regs);
 248
 249 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 250                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 251                 struct compat_timeval __user *tvp);
 252
 253 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 254
 255 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 256                                  compat_uint_t __user *stat_addr, int options,
 257                                  struct compat_rusage __user *ru);
 258
 259 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 260
 261 #define BITS_TO_COMPAT_LONGS(bits) \
 262         (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
 263
 264 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 265                        unsigned long bitmap_size);
 266 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 267                        unsigned long bitmap_size);
 268 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 269 int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
 270 int get_compat_sigevent(struct sigevent *event,
 271                 const struct compat_sigevent __user *u_event);
 272 long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
 273                                   struct compat_siginfo __user *uinfo);
 274
 275 static inline int compat_timeval_compare(struct compat_timeval *lhs,
 276                                         struct compat_timeval *rhs)
 277 {
 278         if (lhs->tv_sec < rhs->tv_sec)
 279                 return -1;
 280         if (lhs->tv_sec > rhs->tv_sec)
 281                 return 1;
 282         return lhs->tv_usec - rhs->tv_usec;
 283 }
 284
 285 static inline int compat_timespec_compare(struct compat_timespec *lhs,
 286                                         struct compat_timespec *rhs)
 287 {
 288         if (lhs->tv_sec < rhs->tv_sec)
 289                 return -1;
 290         if (lhs->tv_sec > rhs->tv_sec)
 291                 return 1;
 292         return lhs->tv_nsec - rhs->tv_nsec;
 293 }
 294
 295 extern int get_compat_itimerspec(struct itimerspec *dst,
 296                                  const struct compat_itimerspec __user *src);
 297 extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 298                                  const struct itimerspec *src);
 299
 300 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 301                 struct timezone __user *tz);
 302 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 303                 struct timezone __user *tz);
 304
 305 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 306
 307 extern int compat_printk(const char *fmt, ...);
 308 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
 309
 310 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 311                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 312                 const compat_ulong_t __user *new_nodes);
 313
 314 extern int compat_ptrace_request(struct task_struct *child,
 315                                  compat_long_t request,
 316                                  compat_ulong_t addr, compat_ulong_t data);
 317
 318 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 319                                compat_ulong_t addr, compat_ulong_t data);
 320 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 321                                   compat_long_t addr, compat_long_t data);
 322
 323 /*
 324  * epoll (fs/eventpoll.c) compat bits follow ...
 325  */
 326 struct epoll_event;
 327 #define compat_epoll_event      epoll_event
 328 asmlinkage long compat_sys_epoll_pwait(int epfd,
 329                         struct compat_epoll_event __user *events,
 330                         int maxevents, int timeout,
 331                         const compat_sigset_t __user *sigmask,
 332                         compat_size_t sigsetsize);
 333
 334 asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
 335                                 struct compat_timespec __user *t, int flags);
 336
 337 asmlinkage long compat_sys_signalfd(int ufd,
 338                                 const compat_sigset_t __user *sigmask,
 339                                 compat_size_t sigsetsize);
 340 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 341                                    const struct compat_itimerspec __user *utmr,
 342                                    struct compat_itimerspec __user *otmr);
 343 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 344                                    struct compat_itimerspec __user *otmr);
 345
 346 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
 347                                       __u32 __user *pages,
 348                                       const int __user *nodes,
 349                                       int __user *status,
 350                                       int flags);
 351 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename,
 352                                      struct compat_timeval __user *t);
 353 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user * filename,
 354                                       struct compat_stat __user *statbuf,
 355                                       int flag);
 356 asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename,
 357                                   int flags, int mode);
 358
 359 #endif /* CONFIG_COMPAT */
 360 #endif /* _LINUX_COMPAT_H */