include/dlfcn.h

   1 #ifndef _DLFCN_H
   2 #include <dlfcn/dlfcn.h>
   3
   4 /* Now define the internal interfaces.  */
   5 extern void *__dlvsym __P ((void *__handle, __const char *__name,
   6                             __const char *__version));
   7
   8 extern void *__libc_dlopen  __P ((__const char *__name));
   9 extern void *__libc_dlsym   __P ((void *__map, __const char *__name));
  10 extern int   __libc_dlclose __P ((void *__map));
  11
  12 /* Locate shared object containing the given address.  */
  13 extern int _dl_addr (const void *address, Dl_info *info)
  14      internal_function;
  15
  16 /* Open the shared object NAME, relocate it, and run its initializer if it
  17    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  18    the object is already opened, returns its existing map.  */
  19 extern void *_dl_open (const char *name, int mode, const void *caller)
  20      internal_function;
  21
  22 /* Close an object previously opened by _dl_open.  */
  23 extern void _dl_close (void *map)
  24      internal_function;
  25
  26 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  27    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  28    the symbol value, which may be NULL.  */
  29 extern void *_dl_sym (void *handle, const char *name, void *who)
  30     internal_function;
  31
  32 /* Look up version VERSION of symbol NAME in shared object HANDLE
  33    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  34    function, for RTLD_NEXT.  Returns the symbol value, which may be
  35    NULL.  */
  36 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  37                        void *who)
  38     internal_function;
  39
  40 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  41    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  42    set to a string constructed from the strings passed to _dl_signal_error,
  43    and the error code passed is the return value.  ERRSTRING if nonzero
  44    points to a malloc'ed string which the caller has to free after use.
  45    ARGS is passed as argument to OPERATE.  */
  46 extern int _dl_catch_error (char **errstring,
  47                             void (*operate) (void *),
  48                             void *args)
  49      internal_function;
  50
  51 /* Helper function for <dlfcn.h> functions.  Runs the OPERATE function via
  52    _dl_catch_error.  Returns zero for success, nonzero for failure; and
  53    arranges for `dlerror' to return the error details.
  54    ARGS is passed as argument to OPERATE.  */
  55 extern int _dlerror_run (void (*operate) (void *), void *args)
  56      internal_function;
  57
  58 #endif