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