1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 #ifndef __DLFCN_H__
29 #define __DLFCN_H__
30 
31 #include <sys/cdefs.h>
32 
33 __BEGIN_DECLS
34 
35 typedef struct {
36     const char *dli_fname;  /* Pathname of shared object that
37                                contains address */
38     void       *dli_fbase;  /* Address at which shared object
39                                is loaded */
40     const char *dli_sname;  /* Name of nearest symbol with address
41                                lower than addr */
42     void       *dli_saddr;  /* Exact address of symbol named
43                                in dli_sname */
44 } Dl_info;
45 
46 extern void* dlopen(const char*  filename, int flag);
47 extern int dlclose(void*  handle);
48 extern const char* dlerror(void);
49 extern void* dlsym(void* handle, const char* symbol) __nonnull((2));
50 extern void* dlvsym(void* handle, const char* symbol, const char* version) __nonnull((2, 3));
51 extern int dladdr(const void* addr, Dl_info *info);
52 
53 enum {
54 #if defined(__LP64__)
55   RTLD_NOW  = 2,
56 #else
57   RTLD_NOW  = 0,
58 #endif
59   RTLD_LAZY = 1,
60 
61   RTLD_LOCAL  = 0,
62 #if defined(__LP64__)
63   RTLD_GLOBAL = 0x00100,
64 #else
65   RTLD_GLOBAL = 2,
66 #endif
67   RTLD_NOLOAD = 4,
68   RTLD_NODELETE = 0x01000,
69 };
70 
71 #if defined (__LP64__)
72 #define RTLD_DEFAULT  ((void*) 0)
73 #define RTLD_NEXT     ((void*) -1L)
74 #else
75 #define RTLD_DEFAULT  ((void*) 0xffffffff)
76 #define RTLD_NEXT     ((void*) 0xfffffffe)
77 #endif
78 
79 __END_DECLS
80 
81 #endif /* __DLFCN_H */
82 
83 
84