include/dlfcn.h

   1 #ifndef _DLFCN_H
   2 #include <dlfcn/dlfcn.h>
   3
   4 /* Internally used flag.  */
   5 #define __RTLD_DLOPEN   0x80000000
   6
   7 /* Now define the internal interfaces.  */
   8 extern void *__dlvsym (void *__handle, __const char *__name,
   9                        __const char *__version);
  10
  11 extern void *__libc_dlopen  (__const char *__name);
  12 extern void *__libc_dlsym   (void *__map, __const char *__name);
  13 extern int   __libc_dlclose (void *__map);
  14
  15 /* Locate shared object containing the given address.  */
  16 extern int _dl_addr (const void *address, Dl_info *info)
  17      internal_function;
  18
  19 /* Open the shared object NAME, relocate it, and run its initializer if it
  20    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  21    the object is already opened, returns its existing map.  */
  22 extern void *_dl_open (const char *name, int mode, const void *caller)
  23      internal_function;
  24
  25 /* Close an object previously opened by _dl_open.  */
  26 extern void _dl_close (void *map)
  27      internal_function;
  28
  29 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  30    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  31    the symbol value, which may be NULL.  */
  32 extern void *_dl_sym (void *handle, const char *name, void *who)
  33     internal_function;
  34
  35 /* Look up version VERSION of symbol NAME in shared object HANDLE
  36    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  37    function, for RTLD_NEXT.  Returns the symbol value, which may be
  38    NULL.  */
  39 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  40                        void *who)
  41     internal_function;
  42
  43 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  44    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  45    set to a string constructed from the strings passed to _dl_signal_error,
  46    and the error code passed is the return value and *OBJNAME is set to
  47    the object name which experienced the problems.  ERRSTRING if nonzero
  48    points to a malloc'ed string which the caller has to free after use.
  49    ARGS is passed as argument to OPERATE.  */
  50 extern int _dl_catch_error (const char **objname, const char **errstring,
  51                             void (*operate) (void *),
  52                             void *args)
  53      internal_function;
  54
  55 /* Helper function for <dlfcn.h> functions.  Runs the OPERATE function via
  56    _dl_catch_error.  Returns zero for success, nonzero for failure; and
  57    arranges for `dlerror' to return the error details.
  58    ARGS is passed as argument to OPERATE.  */
  59 extern int _dlerror_run (void (*operate) (void *), void *args)
  60      internal_function;
  61
  62 #endif