2 #include <dlfcn/dlfcn.h>
3 #include <link.h> /* For ElfW. */
5 /* Internally used flag. */
6 #define __RTLD_DLOPEN 0x80000000
7 #define __RTLD_SPROF 0x40000000
8 #define __RTLD_OPENEXEC 0x20000000
9 #define __RTLD_CALLMAP 0x10000000
10 #define __RTLD_AUDIT 0x08000000
12 #define __LM_ID_CALLER -2
15 /* Locally stored program arguments. */
16 extern int __dlfcn_argc attribute_hidden
;
17 extern char **__dlfcn_argv attribute_hidden
;
19 /* These variables are defined and initialized in the startup code. */
20 extern int __libc_argc attribute_hidden
;
21 extern char **__libc_argv attribute_hidden
;
23 # define __dlfcn_argc __libc_argc
24 # define __dlfcn_argv __libc_argv
28 /* Now define the internal interfaces. */
30 #define __libc_dlopen(name) \
31 __libc_dlopen_mode (name, RTLD_LAZY | __RTLD_DLOPEN)
32 extern void *__libc_dlopen_mode (__const
char *__name
, int __mode
);
33 extern void *__libc_dlsym (void *__map
, __const
char *__name
);
34 extern int __libc_dlclose (void *__map
);
35 libc_hidden_proto (__libc_dlopen_mode
)
36 libc_hidden_proto (__libc_dlsym
)
37 libc_hidden_proto (__libc_dlclose
)
39 /* Locate shared object containing the given address. */
41 extern int _dl_addr (const void *address
, Dl_info
*info
,
42 struct link_map
**mapp
, const ElfW(Sym
) **symbolp
)
44 libc_hidden_proto (_dl_addr
)
47 /* Close an object previously opened by _dl_open. */
48 extern void _dl_close (void *map
) attribute_hidden
;
50 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
51 RTLD_NEXT). WHO is the calling function, for RTLD_NEXT. Returns
52 the symbol value, which may be NULL. */
53 extern void *_dl_sym (void *handle
, const char *name
, void *who
)
56 /* Look up version VERSION of symbol NAME in shared object HANDLE
57 (which may be RTLD_DEFAULT or RTLD_NEXT). WHO is the calling
58 function, for RTLD_NEXT. Returns the symbol value, which may be
60 extern void *_dl_vsym (void *handle
, const char *name
, const char *version
,
64 /* Call OPERATE, catching errors from `dl_signal_error'. If there is no
65 error, *ERRSTRING is set to null. If there is an error, *ERRSTRING is
66 set to a string constructed from the strings passed to _dl_signal_error,
67 and the error code passed is the return value and *OBJNAME is set to
68 the object name which experienced the problems. ERRSTRING if nonzero
69 points to a malloc'ed string which the caller has to free after use.
70 ARGS is passed as argument to OPERATE. */
71 extern int _dl_catch_error (const char **objname
, const char **errstring
,
72 void (*operate
) (void *),
76 /* Helper function for <dlfcn.h> functions. Runs the OPERATE function via
77 _dl_catch_error. Returns zero for success, nonzero for failure; and
78 arranges for `dlerror' to return the error details.
79 ARGS is passed as argument to OPERATE. */
80 extern int _dlerror_run (void (*operate
) (void *), void *args
)
84 # define DL_CALLER_DECL /* Nothing */
85 # define DL_CALLER RETURN_ADDRESS (0)
87 # define DL_CALLER_DECL , void *dl_caller
88 # define DL_CALLER dl_caller
93 void *(*dlopen
) (const char *file
, int mode
, void *dl_caller
);
94 int (*dlclose
) (void *handle
);
95 void *(*dlsym
) (void *handle
, const char *name
, void *dl_caller
);
96 void *(*dlvsym
) (void *handle
, const char *name
, const char *version
,
98 char *(*dlerror
) (void);
99 int (*dladdr
) (const void *address
, Dl_info
*info
);
100 int (*dladdr1
) (const void *address
, Dl_info
*info
,
101 void **extra_info
, int flags
);
102 int (*dlinfo
) (void *handle
, int request
, void *arg
, void *dl_caller
);
103 void *(*dlmopen
) (Lmid_t nsid
, const char *file
, int mode
, void *dl_caller
);
107 extern struct dlfcn_hook
*_dlfcn_hook
;
108 libdl_hidden_proto (_dlfcn_hook
)
110 extern void *__dlopen (const char *file
, int mode DL_CALLER_DECL
)
112 extern void *__dlmopen (Lmid_t nsid
, const char *file
, int mode DL_CALLER_DECL
)
114 extern int __dlclose (void *handle
)
116 extern void *__dlsym (void *handle
, const char *name DL_CALLER_DECL
)
118 extern void *__dlvsym (void *handle
, const char *name
, const char *version
121 extern char *__dlerror (void)
123 extern int __dladdr (const void *address
, Dl_info
*info
)
125 extern int __dladdr1 (const void *address
, Dl_info
*info
,
126 void **extra_info
, int flags
)
128 extern int __dlinfo (void *handle
, int request
, void *arg DL_CALLER_DECL
)
133 extern void * __libc_dlsym_private (struct link_map
*map
, const char *name
)
135 extern void __libc_register_dl_open_hook (struct link_map
*map
)
137 extern void __libc_register_dlfcn_hook (struct link_map
*map
)