include/dlfcn.h

   1 #ifndef _DLFCN_H
   2 #include <dlfcn/dlfcn.h>
   3 #include <link.h>               /* For ElfW.  */
   4
   5 /* Internally used flag.  */
   6 #define __RTLD_DLOPEN   0x80000000
   7 #define __RTLD_SPROF    0x40000000
   8
   9 /* Now define the internal interfaces.  */
  10 extern void *__dlvsym (void *__handle, __const char *__name,
  11                        __const char *__version);
  12
  13 #define __libc_dlopen(name) __libc_dlopen_mode (name, RTLD_LAZY)
  14 extern void *__libc_dlopen_mode  (__const char *__name, int __mode);
  15 extern void *__libc_dlsym   (void *__map, __const char *__name);
  16 extern int   __libc_dlclose (void *__map);
  17
  18 /* Locate shared object containing the given address.  */
  19 #ifdef ElfW
  20 extern int _dl_addr (const void *address, Dl_info *info,
  21                      struct link_map **mapp, const ElfW(Sym) **symbolp)
  22      internal_function;
  23 libc_hidden_proto (_dl_addr)
  24 #endif
  25
  26 /* Open the shared object NAME, relocate it, and run its initializer if it
  27    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  28    the object is already opened, returns its existing map.  */
  29 extern void *_dl_open (const char *name, int mode, const void *caller)
  30      internal_function;
  31 libc_hidden_proto (_dl_open)
  32
  33 /* Close an object previously opened by _dl_open.  */
  34 extern void _dl_close (void *map)
  35      internal_function;
  36 libc_hidden_proto (_dl_close)
  37
  38 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  39    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  40    the symbol value, which may be NULL.  */
  41 extern void *_dl_sym (void *handle, const char *name, void *who)
  42     internal_function;
  43
  44 /* Look up version VERSION of symbol NAME in shared object HANDLE
  45    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  46    function, for RTLD_NEXT.  Returns the symbol value, which may be
  47    NULL.  */
  48 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  49                        void *who)
  50     internal_function;
  51
  52 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  53    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  54    set to a string constructed from the strings passed to _dl_signal_error,
  55    and the error code passed is the return value and *OBJNAME is set to
  56    the object name which experienced the problems.  ERRSTRING if nonzero
  57    points to a malloc'ed string which the caller has to free after use.
  58    ARGS is passed as argument to OPERATE.  */
  59 extern int _dl_catch_error (const char **objname, const char **errstring,
  60                             void (*operate) (void *),
  61                             void *args)
  62      internal_function;
  63 extern int _dl_catch_error_internal (const char **objname,
  64                                      const char **errstring,
  65                                      void (*operate) (void *), void *args)
  66      internal_function;
  67
  68 /* Helper function for <dlfcn.h> functions.  Runs the OPERATE function via
  69    _dl_catch_error.  Returns zero for success, nonzero for failure; and
  70    arranges for `dlerror' to return the error details.
  71    ARGS is passed as argument to OPERATE.  */
  72 extern int _dlerror_run (void (*operate) (void *), void *args)
  73      internal_function;
  74
  75 #endif