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Diffstat (limited to 'include/dlfcn.h')
| -rw-r--r-- | include/dlfcn.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/include/dlfcn.h b/include/dlfcn.h new file mode 100644 index 0000000..c508843 --- /dev/null +++ b/include/dlfcn.h @@ -0,0 +1,137 @@ +/*- + * 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_ */ |
