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dlfcn.h revision 1.20 
      1 /*	$NetBSD: dlfcn.h,v 1.20 2009/09/24 21:21:33 pooka Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _DLFCN_H_
     33 #define _DLFCN_H_
     34 
     35 #include <sys/featuretest.h>
     36 #include <sys/cdefs.h>
     37 
     38 #if defined(_NETBSD_SOURCE)
     39 typedef struct _dl_info {
     40 	const char	*dli_fname;	/* File defining the symbol */
     41 	void		*dli_fbase;	/* Base address */
     42 	const char	*dli_sname;	/* Symbol name */
     43 	const void	*dli_saddr;	/* Symbol address */
     44 } Dl_info;
     45 #endif /* defined(_NETBSD_SOURCE) */
     46 
     47 /*
     48  * User interface to the run-time linker.
     49  */
     50 __BEGIN_DECLS
     51 void	*dlopen(const char *, int);
     52 int	dlclose(void *);
     53 void	*dlsym(void * __restrict, const char * __restrict);
     54 #if defined(_NETBSD_SOURCE)
     55 int	dladdr(const void * __restrict, Dl_info * __restrict);
     56 int	dlctl(void *, int, void *);
     57 int	dlinfo(void *, int, void *);
     58 #endif
     59 __aconst char *dlerror(void);
     60 __END_DECLS
     61 
     62 /* Values for dlopen `mode'. */
     63 #define RTLD_LAZY	1
     64 #define RTLD_NOW	2
     65 #define RTLD_GLOBAL	0x100		/* Allow global searches in object */
     66 #define RTLD_LOCAL	0x200
     67 #if defined(_NETBSD_SOURCE)
     68 #define DL_LAZY		RTLD_LAZY	/* Compat */
     69 #endif
     70 
     71 /*
     72  * Special handle arguments for dlsym().
     73  */
     74 #define	RTLD_NEXT	((void *) -1)	/* Search subsequent objects. */
     75 #define	RTLD_DEFAULT	((void *) -2)	/* Use default search algorithm. */
     76 #define	RTLD_SELF	((void *) -3)	/* Search the caller itself. */
     77 
     78 /*
     79  * dlctl() commands
     80  */
     81 #if defined(_NETBSD_SOURCE)
     82 #define DL_GETERRNO	1
     83 #define DL_GETSYMBOL	2
     84 #if 0
     85 #define DL_SETSRCHPATH	x
     86 #define DL_GETLIST	x
     87 #define DL_GETREFCNT	x
     88 #define DL_GETLOADADDR	x
     89 #endif /* 0 */
     90 #endif /* defined(_NETBSD_SOURCE) */
     91 
     92 /*
     93  * dlinfo() commands
     94  *
     95  * From Solarisa: http://docs.sun.com/app/docs/doc/816-5168/dlinfo-3c?a=view
     96  */
     97 #if defined(_NETBSD_SOURCE)
     98 #define RTLD_DI_LINKMAP		3
     99 #if 0
    100 #define RTLD_DI_ARGSINFO	1
    101 #define RTLD_DI_CONFIGADDR	2
    102 #define RTLD_DI_LMID		4
    103 #define RTLD_DI_SERINFO		5
    104 #define RTLD_DI_SERINFOSIZE	6
    105 #define RTLD_DI_ORIGIN		7
    106 #define RTLD_DI_GETSIGNAL	8
    107 #define RTLD_DI_SETSIGNAL	9
    108 #endif
    109 #endif /* _NETBSD_SOURCE */
    110 
    111 #endif /* !defined(_DLFCN_H_) */
    112