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