include/dlfcn.h

   1 #ifndef _DLFCN_H
   2 #include <dlfcn/dlfcn.h>
   3
   4 /* Internally used flag.  */
   5 #define __RTLD_DLOPEN   0x80000000
   6 #define __RTLD_SPROF    0x40000000
   7
   8 /* Now define the internal interfaces.  */
   9 extern void *__dlvsym (void *__handle, __const char *__name,
  10                        __const char *__version);
  11
  12 extern void *__libc_dlopen  (__const char *__name);
  13 extern void *__libc_dlsym   (void *__map, __const char *__name);
  14 extern int   __libc_dlclose (void *__map);
  15
  16 /* Locate shared object containing the given address.  */
  17 extern int _dl_addr (const void *address, Dl_info *info)
  18      internal_function;
  19
  20 /* Open the shared object NAME, relocate it, and run its initializer if it
  21    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  22    the object is already opened, returns its existing map.  */
  23 extern void *_dl_open (const char *name, int mode, const void *caller)
  24      internal_function;
  25
  26 /* Close an object previously opened by _dl_open.  */
  27 extern void _dl_close (void *map)
  28      internal_function;
  29
  30 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  31    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  32    the symbol value, which may be NULL.  */
  33 extern void *_dl_sym (void *handle, const char *name, void *who)
  34     internal_function;
  35
  36 /* Look up version VERSION of symbol NAME in shared object HANDLE
  37    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  38    function, for RTLD_NEXT.  Returns the symbol value, which may be
  39    NULL.  */
  40 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  41                        void *who)
  42     internal_function;
  43
  44 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  45    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  46    set to a string constructed from the strings passed to _dl_signal_error,
  47    and the error code passed is the return value and *OBJNAME is set to
  48    the object name which experienced the problems.  ERRSTRING if nonzero
  49    points to a malloc'ed string which the caller has to free after use.
  50    ARGS is passed as argument to OPERATE.  */
  51 extern int _dl_catch_error (const char **objname, const char **errstring,
  52                             void (*operate) (void *),
  53                             void *args)
  54      internal_function;
  55
  56 /* Helper function for <dlfcn.h> functions.  Runs the OPERATE function via
  57    _dl_catch_error.  Returns zero for success, nonzero for failure; and
  58    arranges for `dlerror' to return the error details.
  59    ARGS is passed as argument to OPERATE.  */
  60 extern int _dlerror_run (void (*operate) (void *), void *args)
  61      internal_function;
  62
  63 #endif