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0eb88f2029
to be compatible with symbol versioning support as implemented by GNU libc and documented by http://people.redhat.com/~drepper/symbol-versioning and LSB 3.0. Implement dlvsym() function to allow lookups for a specific version of a given symbol.
140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
/*-
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* Copyright (c) 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DLFCN_H_
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#define _DLFCN_H_
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#include <sys/_types.h>
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/*
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* Modes and flags for dlopen().
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*/
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#define RTLD_LAZY 1 /* Bind function calls lazily. */
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#define RTLD_NOW 2 /* Bind function calls immediately. */
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#define RTLD_MODEMASK 0x3
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#define RTLD_GLOBAL 0x100 /* Make symbols globally available. */
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#define RTLD_LOCAL 0 /* Opposite of RTLD_GLOBAL, and the default. */
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#define RTLD_TRACE 0x200 /* Trace loaded objects and exit. */
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/*
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* Request arguments for dlinfo().
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*/
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#define RTLD_DI_LINKMAP 2 /* Obtain link map. */
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#define RTLD_DI_SERINFO 4 /* Obtain search path info. */
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#define RTLD_DI_SERINFOSIZE 5 /* ... query for required space. */
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#define RTLD_DI_ORIGIN 6 /* Obtain object origin */
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#define RTLD_DI_MAX RTLD_DI_ORIGIN
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/*
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* Special handle arguments for dlsym()/dlinfo().
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*/
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#define RTLD_NEXT ((void *) -1) /* Search subsequent objects. */
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#define RTLD_DEFAULT ((void *) -2) /* Use default search algorithm. */
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#define RTLD_SELF ((void *) -3) /* Search the caller itself. */
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#if __BSD_VISIBLE
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#ifndef _SIZE_T_DECLARED
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typedef __size_t size_t;
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#define _SIZE_T_DECLARED
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#endif
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/*
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* Structure filled in by dladdr().
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*/
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typedef struct dl_info {
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const char *dli_fname; /* Pathname of shared object. */
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void *dli_fbase; /* Base address of shared object. */
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const char *dli_sname; /* Name of nearest symbol. */
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void *dli_saddr; /* Address of nearest symbol. */
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} Dl_info;
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/*-
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* The actual type declared by this typedef is immaterial, provided that
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* it is a function pointer. Its purpose is to provide a return type for
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* dlfunc() which can be cast to a function pointer type without depending
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* on behavior undefined by the C standard, which might trigger a compiler
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* diagnostic. We intentionally declare a unique type signature to force
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* a diagnostic should the application not cast the return value of dlfunc()
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* appropriately.
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*/
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struct __dlfunc_arg {
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int __dlfunc_dummy;
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};
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typedef void (*dlfunc_t)(struct __dlfunc_arg);
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/*
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* Structures, returned by the RTLD_DI_SERINFO dlinfo() request.
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*/
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typedef struct dl_serpath {
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char * dls_name; /* single search path entry */
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unsigned int dls_flags; /* path information */
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} Dl_serpath;
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typedef struct dl_serinfo {
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size_t dls_size; /* total buffer size */
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unsigned int dls_cnt; /* number of path entries */
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Dl_serpath dls_serpath[1]; /* there may be more than one */
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} Dl_serinfo;
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#endif /* __BSD_VISIBLE */
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__BEGIN_DECLS
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/* XSI functions first. */
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int dlclose(void *);
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const char *
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dlerror(void);
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void *dlopen(const char *, int);
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void *dlsym(void * __restrict, const char * __restrict);
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#if __BSD_VISIBLE
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int dladdr(const void * __restrict, Dl_info * __restrict);
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dlfunc_t dlfunc(void * __restrict, const char * __restrict);
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int dlinfo(void * __restrict, int, void * __restrict);
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void dllockinit(void *_context,
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void *(*_lock_create)(void *_context),
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void (*_rlock_acquire)(void *_lock),
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void (*_wlock_acquire)(void *_lock),
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void (*_lock_release)(void *_lock),
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void (*_lock_destroy)(void *_lock),
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void (*_context_destroy)(void *_context));
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void *dlvsym(void * __restrict, const char * __restrict,
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const char * __restrict);
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#endif /* __BSD_VISIBLE */
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__END_DECLS
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#endif /* !_DLFCN_H_ */
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