Update.

	* sysdeps/libm-ieee754/e_gamma_r.c: Initialize *signgamp for NaN
	returns.
	* sysdeps/libm-ieee754/e_gammaf_r.c: Likewise.
	* sysdeps/libm-ieee754/e_gammal_r.c: Likewise.
	Reported by John Reiser <jreiser@BitWagon.com> [PR libc/1185].

	* elf/dl-dst.h: Fix typo.
	* elf/dl-open.c: Likewise.

1999-06-26  Zack Weinberg  <zack@rabi.columbia.edu>

	* elf/dl-libc.c: New file, provides three functions:
	__libc_dlopen, __libc_dlclose, __libc_dlsym.
	* include/dlfcn.h: Prototype them.  Prototype _dl_addr.
	* elf/Makefile (routines): Add dl-libc.c.
	* elf/dl-profstub.c (_dl_mcount_wrapper): Change type of
	argument to void *.
	* elf/ldsodefs.h: Change proto and use of _dl_mcount_wrapper to match.

	* iconv/gconv.c: Include dlfcn.h.
	* iconv/gconv_db.c: Likewise.
	* malloc/mtrace.c: Likewise.  Don't include ldsodefs.h.

	* iconv/gconv_int.h (struct __gconv_loaded_object): Change
	`handle' to a void *.
	(__gconv_find_func): Delete prototype.

	* iconv/gconv_dl.c: Don't include ldsodefs.h.  Remove
	dlerror_run and related functions and structs.  Use
	__libc_dlopen, __libc_dlsym, __libc_dlclose.
	* nss/nsswitch.c: Likewise.

1999-06-28  Ulrich Drepper  <drepper@cygnus.com>

6 files changed, 130 insertions, 7 deletions

diff --git a/elf/Makefile b/elf/Makefile
index 6c526437e2..b5145ea025 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -22,7 +22,7 @@ subdir		:= elf
 
 headers		= elf.h bits/elfclass.h bits/dlfcn.h link.h dlfcn.h
 routines	= $(dl-routines) dl-open dl-close dl-symbol dl-support \
-		  dl-addr enbl-secure dl-profstub dl-origin
+		  dl-addr enbl-secure dl-profstub dl-origin dl-libc
 
 # The core dynamic linking functions are in libc for the static and
 # profiled libraries.
diff --git a/elf/dl-dst.h b/elf/dl-dst.h
index 4b014d6ed5..ca32e25104 100644
--- a/elf/dl-dst.h
+++ b/elf/dl-dst.h
@@ -33,7 +33,7 @@
 extern size_t _dl_dst_count (const char *name, int is_path);
 
 
-/* Guess from the number of DSTs the length of the restul string.  */
+/* Guess from the number of DSTs the length of the result string.  */
 #define DL_DST_REQUIRED(l, name, len, cnt) \
   ({									      \
     size_t origin_len;							      \
diff --git a/elf/dl-libc.c b/elf/dl-libc.c
new file mode 100644
index 0000000000..afb3f2d14e
--- /dev/null
+++ b/elf/dl-libc.c
@@ -0,0 +1,122 @@
+/* Handle loading and unloading shared objects for internal libc purposes.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Zack Weinberg <zack@rabi.columbia.edu>, 1999.
+
+   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.  */
+
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <ldsodefs.h>
+
+/* The purpose of this file is to provide wrappers around the dynamic
+   linker error mechanism (similar to dlopen() et al in libdl) which
+   are usable from within libc.  Generally we want to throw away the
+   string that dlerror() would return and just pass back a null pointer
+   for errors.  This also lets the rest of libc not know about the error
+   handling mechanism.
+
+   Much of this code came from gconv_dl.c with slight modifications. */
+
+static int
+internal_function
+dlerror_run (void (*operate) (void *), void *args)
+{
+  char *last_errstring = NULL;
+  int result;
+
+  (void) _dl_catch_error (&last_errstring, operate, args);
+
+  result = last_errstring != NULL;
+  if (result)
+    free (last_errstring);
+
+  return result;
+}
+
+/* These functions are called by dlerror_run... */
+
+struct do_dlopen_args
+{
+  /* Argument to do_dlopen.  */
+  const char *name;
+
+  /* Return from do_dlopen.  */
+  struct link_map *map;
+};
+
+struct do_dlsym_args
+{
+  /* Arguments to do_dlsym.  */
+  struct link_map *map;
+  const char *name;
+
+  /* Return values of do_dlsym.  */
+  ElfW(Addr) loadbase;
+  const ElfW(Sym) *ref;
+};
+
+static void
+do_dlopen (void *ptr)
+{
+  struct do_dlopen_args *args = (struct do_dlopen_args *) ptr;
+  /* Open and relocate the shared object.  */
+  args->map = _dl_open (args->name, RTLD_LAZY, NULL);
+}
+
+static void
+do_dlsym (void *ptr)
+{
+  struct do_dlsym_args *args = (struct do_dlsym_args *) ptr;
+  args->ref = NULL;
+  args->loadbase = _dl_lookup_symbol (args->name, &args->ref,
+				      args->map->l_local_scope,
+				      args->map->l_name, 0);
+}
+
+static void
+do_dlclose (void *ptr)
+{
+    _dl_close ((struct link_map *) ptr);
+}
+
+/* ... and these functions call dlerror_run. */
+
+void *
+__libc_dlopen (const char *__name)
+{
+  struct do_dlopen_args args;
+  args.name = __name;
+
+  return (dlerror_run (do_dlopen, &args) ? NULL : (void *) args.map);
+}
+
+void *
+__libc_dlsym (void *__map, const char *__name)
+{
+  struct do_dlsym_args args;
+  args.map = __map;
+  args.name = __name;
+
+  return (dlerror_run (do_dlsym, &args) ? NULL
+	  : (void *) (args.loadbase + args.ref->st_value));
+}
+
+int
+__libc_dlclose (void *__map)
+{
+  return dlerror_run (do_dlclose, __map);
+}
diff --git a/elf/dl-open.c b/elf/dl-open.c
index 149badd618..a9d81c75a8 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -127,7 +127,7 @@ dl_open_worker (void *a)
       /* If the substitution failed don't try to load.  */
       if (*new_file == '\0')
 	_dl_signal_error (0, "dlopen",
-			  "empty dynamics string token substitution");
+			  "empty dynamic string token substitution");
 
       /* Now we have a new file name.  */
       file = new_file;
diff --git a/elf/dl-profstub.c b/elf/dl-profstub.c
index 10db640769..55304a73df 100644
--- a/elf/dl-profstub.c
+++ b/elf/dl-profstub.c
@@ -28,9 +28,10 @@ extern struct link_map *_dl_profile_map;
 
 
 void
-_dl_mcount_wrapper (ElfW(Addr) selfpc)
+_dl_mcount_wrapper (void *selfpc)
 {
-  _dl_mcount ((ElfW(Addr)) __builtin_return_address (0), selfpc);
+  _dl_mcount ((ElfW(Addr)) __builtin_return_address (0),
+	      (ElfW(Addr)) selfpc);
 }
 
 
diff --git a/elf/ldsodefs.h b/elf/ldsodefs.h
index f8db76c32c..bd33ba15ee 100644
--- a/elf/ldsodefs.h
+++ b/elf/ldsodefs.h
@@ -407,7 +407,7 @@ extern void _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc);
 /* This function is simply a wrapper around the _dl_mcount function
    which does not require a FROMPC parameter since this is the
    calling function.  */
-extern void _dl_mcount_wrapper (ElfW(Addr) selfpc);
+extern void _dl_mcount_wrapper (void *selfpc);
 
 
 /* Show the members of the auxiliary array passed up from the kernel.  */
@@ -432,7 +432,7 @@ extern const struct r_strlenpair *_dl_important_hwcaps (const char *platform,
    helps do it.  */
 #define _CALL_DL_FCT(fctp, args) \
   ({ if (_dl_profile_map != NULL)					      \
-       _dl_mcount_wrapper ((ElfW(Addr)) fctp);				      \
+       _dl_mcount_wrapper (fctp);					      \
      (*fctp) args;							      \
   })