1 | #ifndef _DLFCN_H |
2 | #include <dlfcn/dlfcn.h> |
3 | #ifndef _ISOMAC |
4 | #include <link.h> /* For ElfW. */ |
5 | #include <stdbool.h> |
6 | |
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. */ |
15 | |
16 | #define __LM_ID_CALLER -2 |
17 | |
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; |
26 | |
27 | # define __dlfcn_argc __libc_argc |
28 | # define __dlfcn_argv __libc_argv |
29 | #endif |
30 | |
31 | |
32 | /* Now define the internal interfaces. */ |
33 | |
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 void *__libc_dlvsym (void *map, const char *name, const char *version); |
39 | extern int __libc_dlclose (void *__map); |
40 | libc_hidden_proto (__libc_dlopen_mode) |
41 | libc_hidden_proto (__libc_dlsym) |
42 | libc_hidden_proto (__libc_dlvsym) |
43 | libc_hidden_proto (__libc_dlclose) |
44 | |
45 | /* Locate shared object containing the given address. */ |
46 | #ifdef ElfW |
47 | extern int _dl_addr (const void *address, Dl_info *info, |
48 | struct link_map **mapp, const ElfW(Sym) **symbolp); |
49 | libc_hidden_proto (_dl_addr) |
50 | #endif |
51 | |
52 | struct link_map; |
53 | |
54 | /* Close an object previously opened by _dl_open. */ |
55 | extern void _dl_close (void *map) attribute_hidden; |
56 | /* Same as above, but without locking and safety checks for user |
57 | provided map arguments. */ |
58 | extern void _dl_close_worker (struct link_map *map, bool force) |
59 | attribute_hidden; |
60 | |
61 | /* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or |
62 | RTLD_NEXT). WHO is the calling function, for RTLD_NEXT. Returns |
63 | the symbol value, which may be NULL. */ |
64 | extern void *_dl_sym (void *handle, const char *name, void *who); |
65 | |
66 | /* Look up version VERSION of symbol NAME in shared object HANDLE |
67 | (which may be RTLD_DEFAULT or RTLD_NEXT). WHO is the calling |
68 | function, for RTLD_NEXT. Returns the symbol value, which may be |
69 | NULL. */ |
70 | extern void *_dl_vsym (void *handle, const char *name, const char *version, |
71 | void *who); |
72 | |
73 | /* Helper function for <dlfcn.h> functions. Runs the OPERATE function via |
74 | _dl_catch_error. Returns zero for success, nonzero for failure; and |
75 | arranges for `dlerror' to return the error details. |
76 | ARGS is passed as argument to OPERATE. */ |
77 | extern int _dlerror_run (void (*operate) (void *), void *args) |
78 | attribute_hidden; |
79 | |
80 | #ifdef SHARED |
81 | # define DL_CALLER_DECL /* Nothing */ |
82 | # define DL_CALLER RETURN_ADDRESS (0) |
83 | #else |
84 | # define DL_CALLER_DECL , void *dl_caller |
85 | # define DL_CALLER dl_caller |
86 | #endif |
87 | |
88 | struct dlfcn_hook |
89 | { |
90 | void *(*dlopen) (const char *file, int mode, void *dl_caller); |
91 | int (*dlclose) (void *handle); |
92 | void *(*dlsym) (void *handle, const char *name, void *dl_caller); |
93 | void *(*dlvsym) (void *handle, const char *name, const char *version, |
94 | void *dl_caller); |
95 | char *(*dlerror) (void); |
96 | int (*dladdr) (const void *address, Dl_info *info); |
97 | int (*dladdr1) (const void *address, Dl_info *info, |
98 | void **, int flags); |
99 | int (*dlinfo) (void *handle, int request, void *arg, void *dl_caller); |
100 | void *(*dlmopen) (Lmid_t nsid, const char *file, int mode, void *dl_caller); |
101 | void *pad[4]; |
102 | }; |
103 | |
104 | extern struct dlfcn_hook *_dlfcn_hook; |
105 | libdl_hidden_proto (_dlfcn_hook) |
106 | |
107 | extern void *__dlopen (const char *file, int mode DL_CALLER_DECL) |
108 | attribute_hidden; |
109 | extern void *__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL) |
110 | attribute_hidden; |
111 | extern int __dlclose (void *handle) |
112 | attribute_hidden; |
113 | extern void *__dlsym (void *handle, const char *name DL_CALLER_DECL) |
114 | attribute_hidden; |
115 | extern void *__dlvsym (void *handle, const char *name, const char *version |
116 | DL_CALLER_DECL) |
117 | attribute_hidden; |
118 | extern char *__dlerror (void) |
119 | attribute_hidden; |
120 | extern int __dladdr (const void *address, Dl_info *info) |
121 | attribute_hidden; |
122 | extern int __dladdr1 (const void *address, Dl_info *info, |
123 | void **, int flags) |
124 | attribute_hidden; |
125 | extern int __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL) |
126 | attribute_hidden; |
127 | |
128 | #ifndef SHARED |
129 | struct link_map; |
130 | extern void * __libc_dlsym_private (struct link_map *map, const char *name) |
131 | attribute_hidden; |
132 | extern void __libc_register_dl_open_hook (struct link_map *map) |
133 | attribute_hidden; |
134 | extern void __libc_register_dlfcn_hook (struct link_map *map) |
135 | attribute_hidden; |
136 | #endif |
137 | #endif |
138 | |
139 | #endif |
140 | |