include/dlfcn.h

   1 /*      $NetBSD: dlfcn.h,v 1.18 2005/03/21 13:25:22 kleink 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 #endif
  58 __aconst char *dlerror(void);
  59 __END_DECLS
  60
  61 /* Values for dlopen `mode'. */
  62 #define RTLD_LAZY       1
  63 #define RTLD_NOW        2
  64 #define RTLD_GLOBAL     0x100           /* Allow global searches in object */
  65 #define RTLD_LOCAL      0x200
  66 #if defined(_NETBSD_SOURCE)
  67 #define DL_LAZY         RTLD_LAZY       /* Compat */
  68 #endif
  69
  70 /*
  71  * Special handle arguments for dlsym().
  72  */
  73 #define RTLD_NEXT       ((void *) -1)   /* Search subsequent objects. */
  74 #define RTLD_DEFAULT    ((void *) -2)   /* Use default search algorithm. */
  75 #define RTLD_SELF       ((void *) -3)   /* Search the caller itself. */
  76
  77 /*
  78  * dlctl() commands
  79  */
  80 #if defined(_NETBSD_SOURCE)
  81 #define DL_GETERRNO     1
  82 #define DL_GETSYMBOL    2
  83 #if 0
  84 #define DL_SETSRCHPATH  x
  85 #define DL_GETLIST      x
  86 #define DL_GETREFCNT    x
  87 #define DL_GETLOADADDR  x
  88 #endif /* 0 */
  89 #endif /* defined(_NETBSD_SOURCE) */
  90
  91 #endif /* !defined(_DLFCN_H_) */