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/*-
* Copyright (c) 1994
* The Regents of the University of California. All rights reserved.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* $FreeBSD: src/include/dlfcn.h,v 1.24 2010/03/24 15:59:51 gahr Exp $
*/
#ifndef _DLFCN_H_
#define _DLFCN_H_
#include <sys/cdefs.h>
#include <machine/stdint.h> /* size_t */
/*
* Modes and flags for dlopen().
*/
#define RTLD_LAZY 1 /* Bind function calls lazily. */
#define RTLD_NOW 2 /* Bind function calls immediately. */
#define RTLD_MODEMASK 0x3
#define RTLD_GLOBAL 0x100 /* Make symbols globally available. */
#define RTLD_LOCAL 0 /* Opposite of RTLD_GLOBAL, and the default. */
#define RTLD_TRACE 0x200 /* Trace loaded objects and exit. */
#define RTLD_NODELETE 0x01000 /* Do not remove members. */
#define RTLD_NOLOAD 0x02000 /* Do not load if not already loaded. */
/*
* Request arguments for dlinfo().
*/
#define RTLD_DI_LINKMAP 2 /* Obtain link map. */
#define RTLD_DI_SERINFO 4 /* Obtain search path info. */
#define RTLD_DI_SERINFOSIZE 5 /* ... query for required space. */
#define RTLD_DI_ORIGIN 6 /* Obtain object origin */
#define RTLD_DI_MAX RTLD_DI_ORIGIN
/*
* Special handle arguments for dlsym()/dlinfo().
*/
#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. */
#if __BSD_VISIBLE
/*
* Structure filled in by dladdr().
*/
typedef struct dl_info {
const char *dli_fname; /* Pathname of shared object. */
void *dli_fbase; /* Base address of shared object. */
const char *dli_sname; /* Name of nearest symbol. */
void *dli_saddr; /* Address of nearest symbol. */
} Dl_info;
/*
* Avoid sys/types.h namespace pollution.
*/
/*
* Structures, returned by the RTLD_DI_SERINFO dlinfo() request.
*/
typedef struct dl_serpath {
char * dls_name; /* single search path entry */
unsigned int dls_flags; /* path information */
} Dl_serpath;
typedef struct dl_serinfo {
__size_t dls_size; /* total buffer size */
unsigned int dls_cnt; /* number of path entries */
Dl_serpath dls_serpath[1]; /* there may be more than one */
} Dl_serinfo;
/*
* The actual type declared by this typedef is immaterial, provided that
* it is a function pointer. Its purpose is to provide a return type for
* dlfunc() which can be cast to a function pointer type without depending
* on behavior undefined by the C standard, which might trigger a compiler
* diagnostic. We intentionally declare a unique type signature to force
* a diagnostic should the application not cast the return value of dlfunc()
* appropriately.
*/
struct __dlfunc_arg {
int __dlfunc_dummy;
};
typedef void (*dlfunc_t)(struct __dlfunc_arg);
#endif /* __BSD_VISIBLE */
__BEGIN_DECLS
/* XSI functions first. */
int dlclose(void *);
char *dlerror(void);
void *dlopen(const char *, int);
void *dlsym(void * __restrict, const char * __restrict);
#if __BSD_VISIBLE
void *fdlopen(int, int);
int dladdr(const void * __restrict, Dl_info * __restrict);
dlfunc_t dlfunc(void * __restrict, const char * __restrict);
int dlinfo(void * __restrict, int, void * __restrict);
void *dlvsym(void * __restrict, const char * __restrict,
const char * __restrict);
#endif /* __BSD_VISIBLE */
__END_DECLS
#endif /* !_DLFCN_H_ */
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