Add SOL_TLS definition from Linux 4.13.
[glibc.git] / include / dlfcn.h
blob888e84d4b8974b0631d789d97badbaa6b1623ae5
1 #ifndef _DLFCN_H
2 #include <dlfcn/dlfcn.h>
3 #ifndef _ISOMAC
4 #include <link.h> /* For ElfW. */
5 #include <stdbool.h>
7 /* Internally used flag. */
8 #define __RTLD_DLOPEN 0x80000000
9 #define __RTLD_SPROF 0x40000000
10 #define __RTLD_OPENEXEC 0x20000000
11 #define __RTLD_CALLMAP 0x10000000
12 #define __RTLD_AUDIT 0x08000000
13 #define __RTLD_SECURE 0x04000000 /* Apply additional security checks. */
14 #define __RTLD_NOIFUNC 0x02000000 /* Suppress calling ifunc functions. */
16 #define __LM_ID_CALLER -2
18 #ifdef SHARED
19 /* Locally stored program arguments. */
20 extern int __dlfcn_argc attribute_hidden;
21 extern char **__dlfcn_argv attribute_hidden;
22 #else
23 /* These variables are defined and initialized in the startup code. */
24 extern int __libc_argc attribute_hidden;
25 extern char **__libc_argv attribute_hidden;
27 # define __dlfcn_argc __libc_argc
28 # define __dlfcn_argv __libc_argv
29 #endif
32 /* Now define the internal interfaces. */
34 #define __libc_dlopen(name) \
35 __libc_dlopen_mode (name, RTLD_LAZY | __RTLD_DLOPEN)
36 extern void *__libc_dlopen_mode (const char *__name, int __mode);
37 extern void *__libc_dlsym (void *__map, const char *__name);
38 extern int __libc_dlclose (void *__map);
39 libc_hidden_proto (__libc_dlopen_mode)
40 libc_hidden_proto (__libc_dlsym)
41 libc_hidden_proto (__libc_dlclose)
43 /* Locate shared object containing the given address. */
44 #ifdef ElfW
45 extern int _dl_addr (const void *address, Dl_info *info,
46 struct link_map **mapp, const ElfW(Sym) **symbolp);
47 libc_hidden_proto (_dl_addr)
48 #endif
50 struct link_map;
52 /* Close an object previously opened by _dl_open. */
53 extern void _dl_close (void *map) attribute_hidden;
54 /* Same as above, but without locking and safety checks for user
55 provided map arguments. */
56 extern void _dl_close_worker (struct link_map *map, bool force)
57 attribute_hidden;
59 /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
60 RTLD_NEXT). WHO is the calling function, for RTLD_NEXT. Returns
61 the symbol value, which may be NULL. */
62 extern void *_dl_sym (void *handle, const char *name, void *who);
64 /* Look up version VERSION of symbol NAME in shared object HANDLE
65 (which may be RTLD_DEFAULT or RTLD_NEXT). WHO is the calling
66 function, for RTLD_NEXT. Returns the symbol value, which may be
67 NULL. */
68 extern void *_dl_vsym (void *handle, const char *name, const char *version,
69 void *who);
71 /* Helper function for <dlfcn.h> functions. Runs the OPERATE function via
72 _dl_catch_error. Returns zero for success, nonzero for failure; and
73 arranges for `dlerror' to return the error details.
74 ARGS is passed as argument to OPERATE. */
75 extern int _dlerror_run (void (*operate) (void *), void *args);
77 #ifdef SHARED
78 # define DL_CALLER_DECL /* Nothing */
79 # define DL_CALLER RETURN_ADDRESS (0)
80 #else
81 # define DL_CALLER_DECL , void *dl_caller
82 # define DL_CALLER dl_caller
83 #endif
85 struct dlfcn_hook
87 void *(*dlopen) (const char *file, int mode, void *dl_caller);
88 int (*dlclose) (void *handle);
89 void *(*dlsym) (void *handle, const char *name, void *dl_caller);
90 void *(*dlvsym) (void *handle, const char *name, const char *version,
91 void *dl_caller);
92 char *(*dlerror) (void);
93 int (*dladdr) (const void *address, Dl_info *info);
94 int (*dladdr1) (const void *address, Dl_info *info,
95 void **extra_info, int flags);
96 int (*dlinfo) (void *handle, int request, void *arg, void *dl_caller);
97 void *(*dlmopen) (Lmid_t nsid, const char *file, int mode, void *dl_caller);
98 void *pad[4];
101 extern struct dlfcn_hook *_dlfcn_hook;
102 libdl_hidden_proto (_dlfcn_hook)
104 extern void *__dlopen (const char *file, int mode DL_CALLER_DECL)
105 attribute_hidden;
106 extern void *__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL)
107 attribute_hidden;
108 extern int __dlclose (void *handle)
109 attribute_hidden;
110 extern void *__dlsym (void *handle, const char *name DL_CALLER_DECL)
111 attribute_hidden;
112 extern void *__dlvsym (void *handle, const char *name, const char *version
113 DL_CALLER_DECL)
114 attribute_hidden;
115 extern char *__dlerror (void)
116 attribute_hidden;
117 extern int __dladdr (const void *address, Dl_info *info)
118 attribute_hidden;
119 extern int __dladdr1 (const void *address, Dl_info *info,
120 void **extra_info, int flags)
121 attribute_hidden;
122 extern int __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL)
123 attribute_hidden;
125 #ifndef SHARED
126 struct link_map;
127 extern void * __libc_dlsym_private (struct link_map *map, const char *name)
128 attribute_hidden;
129 extern void __libc_register_dl_open_hook (struct link_map *map)
130 attribute_hidden;
131 extern void __libc_register_dlfcn_hook (struct link_map *map)
132 attribute_hidden;
133 #endif
134 #endif
136 #endif