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      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