Update.

	* sysdeps/gnu/Makefile (libdl-routines): Add eval.

1999-07-06  Zack Weinberg  <zack@rabi.columbia.edu>

	* dlfcn: New directory.  Move the following files from elf:
	dladdr.c, dlclose.c, dlerror.c, dlfcn.h, dlopen.c,
	dlopenold.c, dlsym.c, dlvsym.c.
	* dlfcn/Makefile: New file.
	* dlfcn/Versions: New file.
	* dlfcn/dlsym.c: All ELF-specific code split out to new
	function _dl_sym.
	* dlfcn/dlvsym.c: All ELF-specific code split out to new
	function _dl_vsym.
	* elf/dl-sym.c: New file.  _dl_sym and _dl_vsym are
	implemented here.

	* dlfcn/dladdr.c: Remove all references to ELF data structures
	or headers.
	* dlfcn/dlclose.c: Likewise.
	* dlfcn/dlerror.c: Likewise.
	* dlfcn/dlopen.c: Likewise.
	* dlfcn/dlopenold.c: Likewise.

	* Makeconfig (dlfcn): New variable - set to `dlfcn' if elf is
	yes, empty otherwise.
	(libdl): Set to dlfcn/libdl.so or libdl.a if elf is yes,
	depending on build-shared.
	(subdirs): Add $(dlfcn).
	(rpath-dirs): Add dlfcn.
	* elf/Makefile: Remove all references to libdl or its
	components, except the ones relating to the test cases.
	(routines): Add dl-sym.
	* elf/Versions (libc): Add _dl_sym and _dl_vsym for GLIBC_2.2.
	(libdl): Delete.

	* elf/dl-close.c (_dl_close): Change argument to void *.
	* elf/dl-open.c (_dl_open): Change return type to void *.
	* elf/eval.c: Removed.
	* elf/ldsodefs.h: Move prototypes of _dl_catch_error,
	_dlerror_run, _dl_open, _dl_close, _dl_addr, and
	_dl_mcount_wrapper_check to include/dlfcn.h.  Delete
	_CALL_DL_FCT macro.
	* include/dlfcn.h: Also prototype _dl_sym and _dl_vsym here.
	Include real header from dlfcn directory.
	* include/ldsodefs.h: Removed.

	* grp/initgroups.c: Use DL_CALL_FCT not _CALL_DL_FCT.
	* nss/getXXbyYY_r.c: Likewise.
	* nss/getXXent_r.c: Likewise.
	* iconv/gconv.c: Likewise.  Don't include ldsodefs.h.
	* iconv/gconv_db.c: Likewise.  Don't include ldsodefs.h.
	* iconv/skeleton.c: Don't include ldsodefs.h.
	* nss/nsswitch.h: Don't include ldsodefs.h.  Include dlfcn.h.

1999-07-07  Ulrich Drepper  <drepper@cygnus.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/dlfcn/dlfcn.h b/dlfcn/dlfcn.h
new file mode 100644
index 0000000..76fdc3c
--- /dev/null
+++ b/dlfcn/dlfcn.h
@@ -0,0 +1,100 @@
+/* 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 */