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+/* User functions for run-time dynamic loading.
+ Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _DLFCN_H
+#define _DLFCN_H 1
+
+#include <features.h>
+#define __need_NULL
+#include <stddef.h>
+
+/* Collect various system dependent definitions and declarations. */
+#include <bits/dlfcn.h>
+
+/* If the first argument of `dlsym' or `dlvsym' is set to RTLD_NEXT
+ the run-time address of the symbol called NAME in the next shared
+ object is returned. The "next" relation is defined by the order
+ the shared objects were loaded. */
+#define RTLD_NEXT ((void *) -1l)
+
+/* If the first argument to `dlsym' or `dlvsym' is set to RTLD_DEFAULT
+ the run-time address of the symbol called NAME in the global scope
+ is returned. */
+#define RTLD_DEFAULT NULL
+
+__BEGIN_DECLS
+
+/* Open the shared object FILE and map it in; return a handle that can be
+ passed to `dlsym' to get symbol values from it. */
+extern void *dlopen __P ((__const char *__file, int __mode));
+
+/* Unmap and close a shared object opened by `dlopen'.
+ The handle cannot be used again after calling `dlclose'. */
+extern int dlclose __P ((void *__handle));
+
+/* Find the run-time address in the shared object HANDLE refers to
+ of the symbol called NAME. */
+extern void *dlsym __P ((void *__restrict __handle,
+ __const char *__restrict __name));
+
+#ifdef __USE_GNU
+/* Find the run-time address in the shared object HANDLE refers to
+ of the symbol called NAME with VERSION. */
+extern void *dlvsym __P ((void *__restrict __handle,
+ __const char *__restrict __name,
+ __const char *__restrict __version));
+#endif
+
+/* When any of the above functions fails, call this function
+ to return a string describing the error. Each call resets
+ the error string so that a following call returns null. */
+extern char *dlerror __P ((void));
+
+#ifdef __USE_GNU
+/* Fill in *INFO with the following information about ADDRESS.
+ Returns 0 iff no shared object's segments contain that address. */
+typedef struct
+ {
+ __const char *dli_fname; /* File name of defining object. */
+ void *dli_fbase; /* Load address of that object. */
+ __const char *dli_sname; /* Name of nearest symbol. */
+ void *dli_saddr; /* Exact value of nearest symbol. */
+ } Dl_info;
+extern int dladdr __P ((const void *__address, Dl_info *__info));
+
+/* To support profiling of shared objects it is a good idea to call
+ the function found using `dlsym' using the following macro since
+ these calls do not use the PLT. But this would mean the dynamic
+ loader has no chance to find out when the function is called. The
+ macro applies the necessary magic so that profiling is possible.
+ Rewrite
+ foo = (*fctp) (arg1, arg2);
+ into
+ foo = DL_CALL_FCT (fctp, (arg1, arg2));
+*/
+# define DL_CALL_FCT(fctp, args) \
+ (_dl_mcount_wrapper_check (fctp), (*(fctp)) args)
+
+/* This function calls the profiling functions. */
+extern void _dl_mcount_wrapper_check __P ((void *__selfpc));
+#endif
+
+__END_DECLS
+
+#endif /* dlfcn.h */