/*- * 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. * * $FreeBSD$ */ #ifndef _DLFCN_H_ #define _DLFCN_H_ #include <sys/_types.h> /* * 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 #ifndef _SIZE_T_DECLARED typedef __size_t size_t; #define _SIZE_T_DECLARED #endif /* * 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; /*- * 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); /* * 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; #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 dllockinit(void *_context, void *(*_lock_create)(void *_context), void (*_rlock_acquire)(void *_lock), void (*_wlock_acquire)(void *_lock), void (*_lock_release)(void *_lock), void (*_lock_destroy)(void *_lock), void (*_context_destroy)(void *_context)); void *dlvsym(void * __restrict, const char * __restrict, const char * __restrict); #endif /* __BSD_VISIBLE */ __END_DECLS #endif /* !_DLFCN_H_ */