1 /* 2 * Copyright (c) 1994 3 * The Regents of the University of California. 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: src/include/dlfcn.h,v 1.10.2.3 2003/02/20 20:42:45 kan Exp $ 34 * $DragonFly: src/include/dlfcn.h,v 1.4 2003/11/14 01:01:43 dillon Exp $ 35 */ 36 37 #ifndef _DLFCN_H_ 38 #define _DLFCN_H_ 39 40 #include <sys/cdefs.h> 41 #include <machine/stdint.h> /* size_t */ 42 43 /* 44 * Modes and flags for dlopen(). 45 */ 46 #define RTLD_LAZY 1 /* Bind function calls lazily */ 47 #define RTLD_NOW 2 /* Bind function calls immediately */ 48 #define RTLD_MODEMASK 0x3 49 #define RTLD_GLOBAL 0x100 /* Make symbols globally available */ 50 #define RTLD_LOCAL 0 /* Opposite of RTLD_GLOBAL, and the default */ 51 #define RTLD_TRACE 0x200 /* Trace loaded objects and exit */ 52 53 /* 54 * Request arguments for dlinfo(). 55 */ 56 #define RTLD_DI_LINKMAP 2 57 #define RTLD_DI_SERINFO 4 58 #define RTLD_DI_SERINFOSIZE 5 59 #define RTLD_DI_ORIGIN 6 60 61 /* 62 * Special handle arguments for dlsym()/dlinfo(). 63 */ 64 #define RTLD_NEXT ((void *) -1) /* Search subsequent objects */ 65 #define RTLD_DEFAULT ((void *) -2) /* Use default search algorithm */ 66 #define RTLD_SELF ((void *) -3) /* Search the caller itself. */ 67 68 /* 69 * Structure filled in by dladdr(). 70 */ 71 typedef struct dl_info { 72 const char *dli_fname; /* Pathname of shared object */ 73 void *dli_fbase; /* Base address of shared object */ 74 const char *dli_sname; /* Name of nearest symbol */ 75 void *dli_saddr; /* Address of nearest symbol */ 76 } Dl_info; 77 78 /* 79 * Avoid sys/types.h namespace pollution. 80 */ 81 82 /* 83 * Structures, returned by the RTLD_DI_SERINFO dlinfo() request. 84 */ 85 typedef struct dl_serpath { 86 char * dls_name; /* single search path entry */ 87 unsigned int dls_flags; /* path information */ 88 } Dl_serpath; 89 90 typedef struct dl_serinfo { 91 __size_t dls_size; /* total buffer size */ 92 unsigned int dls_cnt; /* number of path entries */ 93 Dl_serpath dls_serpath[1]; /* there may be more than one */ 94 } Dl_serinfo; 95 96 __BEGIN_DECLS 97 int dladdr (const void *, Dl_info *); 98 int dlclose (void *); 99 const char *dlerror (void); 100 int dlinfo (void *, int, void *); 101 void dllockinit (void *_context, 102 void *(*_lock_create)(void *_context), 103 void (*_rlock_acquire)(void *_lock), 104 void (*_wlock_acquire)(void *_lock), 105 void (*_lock_release)(void *_lock), 106 void (*_lock_destroy)(void *_lock), 107 void (*_context_destroy)(void *_context)); 108 void *dlopen (const char *, int); 109 void *dlsym (void *, const char *); 110 __END_DECLS 111 112 #endif /* !_DLFCN_H_ */ 113