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 #define __RTLD_OPENEXEC 0x20000000
   9
  10 /* Now define the internal interfaces.  */
  11 extern void *__dlvsym (void *__handle, __const char *__name,
  12                        __const char *__version);
  13
  14 #define __libc_dlopen(name) __libc_dlopen_mode (name, RTLD_LAZY)
  15 extern void *__libc_dlopen_mode  (__const char *__name, int __mode);
  16 extern void *__libc_dlsym   (void *__map, __const char *__name);
  17 extern int   __libc_dlclose (void *__map);
  18 libc_hidden_proto (__libc_dlopen_mode)
  19 libc_hidden_proto (__libc_dlsym)
  20 libc_hidden_proto (__libc_dlclose)
  21
  22 /* Locate shared object containing the given address.  */
  23 #ifdef ElfW
  24 extern int _dl_addr (const void *address, Dl_info *info,
  25                      struct link_map **mapp, const ElfW(Sym) **symbolp)
  26      internal_function;
  27 libc_hidden_proto (_dl_addr)
  28 #endif
  29
  30 /* Open the shared object NAME, relocate it, and run its initializer if it
  31    hasn't already been run.  MODE is as for `dlopen' (see <dlfcn.h>).  If
  32    the object is already opened, returns its existing map.  */
  33 extern void *_dl_open (const char *name, int mode, const void *caller)
  34      internal_function;
  35 libc_hidden_proto (_dl_open)
  36
  37 /* Close an object previously opened by _dl_open.  */
  38 extern void _dl_close (void *map)
  39      internal_function;
  40 libc_hidden_proto (_dl_close)
  41
  42 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
  43    RTLD_NEXT).  WHO is the calling function, for RTLD_NEXT.  Returns
  44    the symbol value, which may be NULL.  */
  45 extern void *_dl_sym (void *handle, const char *name, void *who)
  46     internal_function;
  47
  48 /* Look up version VERSION of symbol NAME in shared object HANDLE
  49    (which may be RTLD_DEFAULT or RTLD_NEXT).  WHO is the calling
  50    function, for RTLD_NEXT.  Returns the symbol value, which may be
  51    NULL.  */
  52 extern void *_dl_vsym (void *handle, const char *name, const char *version,
  53                        void *who)
  54     internal_function;
  55
  56 /* Call OPERATE, catching errors from `dl_signal_error'.  If there is no
  57    error, *ERRSTRING is set to null.  If there is an error, *ERRSTRING is
  58    set to a string constructed from the strings passed to _dl_signal_error,
  59    and the error code passed is the return value and *OBJNAME is set to
  60    the object name which experienced the problems.  ERRSTRING if nonzero
  61    points to a malloc'ed string which the caller has to free after use.
  62    ARGS is passed as argument to OPERATE.  */
  63 extern int _dl_catch_error (const char **objname, const char **errstring,
  64                             void (*operate) (void *),
  65                             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