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 libc_hidden_proto (_dl_addr)
  20
  21 /* Open the shared object NAME, relocate it, and run its initializer if it
  22    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  23    the object is already opened, returns its existing map.  */
  24 extern void *_dl_open (const char *name, int mode, const void *caller)
  25      internal_function;
  26 libc_hidden_proto (_dl_open)
  27
  28 /* Close an object previously opened by _dl_open.  */
  29 extern void _dl_close (void *map)
  30      internal_function;
  31 libc_hidden_proto (_dl_close)
  32
  33 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  34    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  35    the symbol value, which may be NULL.  */
  36 extern void *_dl_sym (void *handle, const char *name, void *who)
  37     internal_function;
  38
  39 /* Look up version VERSION of symbol NAME in shared object HANDLE
  40    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  41    function, for RTLD_NEXT.  Returns the symbol value, which may be
  42    NULL.  */
  43 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  44                        void *who)
  45     internal_function;
  46
  47 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  48    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  49    set to a string constructed from the strings passed to _dl_signal_error,
  50    and the error code passed is the return value and *OBJNAME is set to
  51    the object name which experienced the problems.  ERRSTRING if nonzero
  52    points to a malloc'ed string which the caller has to free after use.
  53    ARGS is passed as argument to OPERATE.  */
  54 extern int _dl_catch_error (const char **objname, const char **errstring,
  55                             void (*operate) (void *),
  56                             void *args)
  57      internal_function;
  58 extern int _dl_catch_error_internal (const char **objname,
  59                                      const char **errstring,
  60                                      void (*operate) (void *), void *args)
  61      internal_function;
  62
  63 /* Helper function for <dlfcn.h> functions.  Runs the OPERATE function via
  64    _dl_catch_error.  Returns zero for success, nonzero for failure; and
  65    arranges for `dlerror' to return the error details.
  66    ARGS is passed as argument to OPERATE.  */
  67 extern int _dlerror_run (void (*operate) (void *), void *args)
  68      internal_function;
  69
  70 #endif