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 #define __libc_dlopen(name) __libc_dlopen_mode (name, RTLD_LAZY)
  13 extern void *__libc_dlopen_mode  (__const char *__name, int __mode);
  14 extern void *__libc_dlsym   (void *__map, __const char *__name);
  15 extern int   __libc_dlclose (void *__map);
  16
  17 /* Locate shared object containing the given address.  */
  18 extern int _dl_addr (const void *address, Dl_info *info)
  19      internal_function;
  20 libc_hidden_proto (_dl_addr)
  21
  22 /* Open the shared object NAME, relocate it, and run its initializer if it
  23    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  24    the object is already opened, returns its existing map.  */
  25 extern void *_dl_open (const char *name, int mode, const void *caller)
  26      internal_function;
  27 libc_hidden_proto (_dl_open)
  28
  29 /* Close an object previously opened by _dl_open.  */
  30 extern void _dl_close (void *map)
  31      internal_function;
  32 libc_hidden_proto (_dl_close)
  33
  34 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  35    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  36    the symbol value, which may be NULL.  */
  37 extern void *_dl_sym (void *handle, const char *name, void *who)
  38     internal_function;
  39
  40 /* Look up version VERSION of symbol NAME in shared object HANDLE
  41    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  42    function, for RTLD_NEXT.  Returns the symbol value, which may be
  43    NULL.  */
  44 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  45                        void *who)
  46     internal_function;
  47
  48 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  49    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  50    set to a string constructed from the strings passed to _dl_signal_error,
  51    and the error code passed is the return value and *OBJNAME is set to
  52    the object name which experienced the problems.  ERRSTRING if nonzero
  53    points to a malloc'ed string which the caller has to free after use.
  54    ARGS is passed as argument to OPERATE.  */
  55 extern int _dl_catch_error (const char **objname, const char **errstring,
  56                             void (*operate) (void *),
  57                             void *args)
  58      internal_function;
  59 extern int _dl_catch_error_internal (const char **objname,
  60                                      const char **errstring,
  61                                      void (*operate) (void *), void *args)
  62      internal_function;
  63
  64 /* Helper function for <dlfcn.h> functions.  Runs the OPERATE function via
  65    _dl_catch_error.  Returns zero for success, nonzero for failure; and
  66    arranges for `dlerror' to return the error details.
  67    ARGS is passed as argument to OPERATE.  */
  68 extern int _dlerror_run (void (*operate) (void *), void *args)
  69      internal_function;
  70
  71 #endif