/*      $NetBSD: dlfcn.h,v 1.26 2024/11/02 20:53:58 nia Exp $   */

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Kranenburg.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _DLFCN_H_
#define _DLFCN_H_

#include <sys/featuretest.h>
#include <sys/cdefs.h>
#include <machine/ansi.h>

#ifdef  _BSD_SSIZE_T_
typedef _BSD_SSIZE_T_   ssize_t;
#undef  _BSD_SSIZE_T_
#endif

#if defined(_NETBSD_SOURCE)
typedef struct _dl_info {
        const char      *dli_fname;     /* File defining the symbol */
        void            *dli_fbase;     /* Base address */
        const char      *dli_sname;     /* Symbol name */
        const void      *dli_saddr;     /* Symbol address */
} Dl_info;
#endif /* defined(_NETBSD_SOURCE) */

/*
 * User interface to the run-time linker.
 */
__BEGIN_DECLS
void *_dlauxinfo(void) __pure;

void    *dlopen(const char *, int);
int     dlclose(void *);
void    *dlsym(void * __restrict, const char * __restrict);
#if (_POSIX_C_SOURCE - 0 >= 202405L) || defined(_NETBSD_SOURCE)
int     dladdr(const void * __restrict, Dl_info * __restrict);
#endif
#if defined(_NETBSD_SOURCE)
int     dlctl(void *, int, void *);
int     dlinfo(void *, int, void *);
void    *dlvsym(void * __restrict, const char * __restrict,
            const char * __restrict);
void    __dl_cxa_refcount(void *, ssize_t);
#endif
__aconst char *dlerror(void);
__END_DECLS

/* Values for dlopen `mode'. */
#define RTLD_LAZY       1
#define RTLD_NOW        2
#define RTLD_GLOBAL     0x100           /* Allow global searches in object */
#define RTLD_LOCAL      0x200
#define RTLD_NODELETE   0x01000         /* Do not remove members. */
#define RTLD_NOLOAD     0x02000         /* Do not load if not already loaded. */
#if defined(_NETBSD_SOURCE)
#define DL_LAZY         RTLD_LAZY       /* Compat */
#endif

/* 
 * Special handle arguments for dlsym().
 */   
#define RTLD_NEXT       ((void *) -1)   /* Search subsequent objects. */
#define RTLD_DEFAULT    ((void *) -2)   /* Use default search algorithm. */
#define RTLD_SELF       ((void *) -3)   /* Search the caller itself. */

/*
 * dlctl() commands
 */
#if defined(_NETBSD_SOURCE)
#define DL_GETERRNO     1
#define DL_GETSYMBOL    2
#if 0
#define DL_SETSRCHPATH  x
#define DL_GETLIST      x
#define DL_GETREFCNT    x
#define DL_GETLOADADDR  x
#endif /* 0 */
#endif /* defined(_NETBSD_SOURCE) */

/*
 * dlinfo() commands
 *
 * From Solaris: http://docs.sun.com/app/docs/doc/816-5168/dlinfo-3c?a=view
 */
#if defined(_NETBSD_SOURCE)
#define RTLD_DI_LINKMAP         3
#if 0
#define RTLD_DI_ARGSINFO        1
#define RTLD_DI_CONFIGADDR      2
#define RTLD_DI_LMID            4
#define RTLD_DI_SERINFO         5
#define RTLD_DI_SERINFOSIZE     6
#define RTLD_DI_ORIGIN          7
#define RTLD_DI_GETSIGNAL       8
#define RTLD_DI_SETSIGNAL       9
#endif
#endif /* _NETBSD_SOURCE */

#endif /* !defined(_DLFCN_H_) */