1 /* $OpenBSD: dlfcn.h,v 1.14 2017/11/28 17:19:47 kettenis Exp $ */ 2 /* $NetBSD: dlfcn.h,v 1.2 1995/06/05 19:38:00 pk Exp $ */ 3 4 /* 5 * Copyright (c) 1995 Paul Kranenburg 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Paul Kranenburg. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _DLFCN_H_ 35 #define _DLFCN_H_ 36 37 #include <sys/cdefs.h> 38 39 /* Values for dlopen `mode'. */ 40 #define RTLD_LAZY 1 41 #define RTLD_NOW 2 42 #define RTLD_GLOBAL 0x100 43 #define RTLD_LOCAL 0x000 44 #define RTLD_TRACE 0x200 45 46 /* 47 * Special handle arguments for dlsym(). 48 */ 49 #define RTLD_NEXT ((void *) -1) /* Search subsequent objects. */ 50 #define RTLD_DEFAULT ((void *) -2) /* Use default search algorithm. */ 51 #define RTLD_SELF ((void *) -3) /* Search the caller itself. */ 52 53 #if __BSD_VISIBLE 54 55 /* 56 * Structure filled in by dladdr(). 57 */ 58 typedef struct dl_info { 59 const char *dli_fname; /* Pathname of shared object. */ 60 void *dli_fbase; /* Base address of shared object. */ 61 const char *dli_sname; /* Name of nearest symbol. */ 62 void *dli_saddr; /* Address of nearest symbol. */ 63 } Dl_info; 64 65 /* 66 * dlctl() commands 67 */ 68 #define DL_GETERRNO 1 69 #define DL_SETSRCHPATH x 70 #define DL_GETLIST x 71 #define DL_GETREFCNT x 72 #define DL_GETLOADADDR x 73 #define DL_SETTHREADLCK 2 74 #define DL_SETBINDLCK 3 75 #define DL_REFERENCE 4 76 77 #define DL_LAZY RTLD_LAZY /* Compat */ 78 79 #endif /* __BSD_VISIBLE */ 80 81 82 /* 83 * User interface to the run-time linker. 84 */ 85 __BEGIN_DECLS 86 void *dlopen(const char *, int); 87 int dlclose(void *); 88 void *dlsym(void *__restrict, const char *__restrict); 89 char *dlerror(void); 90 91 #if __BSD_VISIBLE 92 int dladdr(const void *, Dl_info *); 93 int dlctl(void *, int, void *); 94 #endif /* __BSD_VISIBLE */ 95 96 __END_DECLS 97 98 #endif /* _DLFCN_H_ */ 99