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. */
20extern int __dlfcn_argc attribute_hidden;
21extern char **__dlfcn_argv attribute_hidden;
22#else
23/* These variables are defined and initialized in the startup code. */
24extern int __libc_argc attribute_hidden;
25extern 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)
36extern void *__libc_dlopen_mode (const char *__name, int __mode);
37extern void *__libc_dlsym (void *__map, const char *__name);
38extern void *__libc_dlvsym (void *map, const char *name, const char *version);
39extern int __libc_dlclose (void *__map);
40libc_hidden_proto (__libc_dlopen_mode)
41libc_hidden_proto (__libc_dlsym)
42libc_hidden_proto (__libc_dlvsym)
43libc_hidden_proto (__libc_dlclose)
44
45/* Locate shared object containing the given address. */
46#ifdef ElfW
47extern int _dl_addr (const void *address, Dl_info *info,
48 struct link_map **mapp, const ElfW(Sym) **symbolp);
49libc_hidden_proto (_dl_addr)
50#endif
51
52struct link_map;
53
54/* Close an object previously opened by _dl_open. */
55extern void _dl_close (void *map) attribute_hidden;
56/* Same as above, but without locking and safety checks for user
57 provided map arguments. */
58extern 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. */
64extern 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. */
70extern 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. */
77extern 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
88struct 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 **extra_info, 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
104extern struct dlfcn_hook *_dlfcn_hook;
105libdl_hidden_proto (_dlfcn_hook)
106
107extern void *__dlopen (const char *file, int mode DL_CALLER_DECL)
108 attribute_hidden;
109extern void *__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL)
110 attribute_hidden;
111extern int __dlclose (void *handle)
112 attribute_hidden;
113extern void *__dlsym (void *handle, const char *name DL_CALLER_DECL)
114 attribute_hidden;
115extern void *__dlvsym (void *handle, const char *name, const char *version
116 DL_CALLER_DECL)
117 attribute_hidden;
118extern char *__dlerror (void)
119 attribute_hidden;
120extern int __dladdr (const void *address, Dl_info *info)
121 attribute_hidden;
122extern int __dladdr1 (const void *address, Dl_info *info,
123 void **extra_info, int flags)
124 attribute_hidden;
125extern int __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL)
126 attribute_hidden;
127
128#ifndef SHARED
129struct link_map;
130extern void * __libc_dlsym_private (struct link_map *map, const char *name)
131 attribute_hidden;
132extern void __libc_register_dl_open_hook (struct link_map *map)
133 attribute_hidden;
134extern void __libc_register_dlfcn_hook (struct link_map *map)
135 attribute_hidden;
136#endif
137#endif
138
139#endif
140