Update.

2001-02-26  Ulrich Drepper  <drepper@redhat.com>

	* dlfcn/Makefile (distribute): Add modatexit.c and modcxaatexit.c.
	(tests): Add tstatexit and tstcxaatexit.
	(module-names): Add modatexit and modcxaatexit.
	Add rules to build and run tstatexit and tstcxaatexit.
	* dlfcn/modatexit.c: New file.
	* dlfcn/modcxaatexit.c: New file.
	* dlfcn/tstatexit.c: New file.
	* dlfcn/tstcxaatexit.c: New file.

	* io/Makefile: Pass -DHAVE_DOT_HIDDEN to stat and mknod functions if
	.hidden is available.
	* io/stat.c: If .hidden is available use it to avoid exporting
	functions.
	* io/fstat.c: Likewise.
	* io/lstat.c: Likewise.
	* io/stat64.c: Likewise.
	* io/fstat64.c: Likewise.
	* io/lstat64.c: Likewise.
	* sysdeps/generic/mknod.c: Likewise.

	* malloc/mtrace.c: Use __cxa_atexit and not atexit.
	* sysdeps/generic/bb_init_func.c: Likewise.
	* sysdeps/generic/libc-start.c: Likewise.

	* stdlib/atexit.c (__new_exitfn): Move to cxa_atexit.c.
	(atexit): Implement using __cxa_atexit.
	Use .hidden if availble to avoid exporting atexit.
	* stdlib/cxa_atexit.c (__new_exitfn): Moved to here from atexit.c.
	* stdlib/Versions: Export __new_exitfn for GLIBC_2.2.3.
	* stdlib/Makefile (routines): Add old_atexit.
	(static-only-routines): Add atexit.
	Pass -DHAVE_DOT_HIDDEN for atexit.c if .hidden is available.
	* stdlib/old_atexit.c: New file.

	* intl/Makefile: Remove bogus endif.

5 files changed, 90 insertions, 65 deletions

diff --git a/stdlib/Makefile b/stdlib/Makefile
index 6faa1c5..193c42b 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -29,7 +29,7 @@ routines	:=							      \
 	abort								      \
 	bsearch qsort msort						      \
 	getenv putenv setenv secure-getenv				      \
-	exit on_exit atexit cxa_atexit cxa_finalize			      \
+	exit on_exit atexit cxa_atexit cxa_finalize old_atexit		      \
 	abs labs llabs							      \
 	div ldiv lldiv							      \
 	mblen mbstowcs mbtowc wcstombs wctomb				      \
@@ -49,6 +49,11 @@ routines	:=							      \
 	strtoimax strtoumax wcstoimax wcstoumax				      \
 	getcontext setcontext makecontext swapcontext
 
+# These routines will be omitted from the libc shared object.
+# Instead the static object files will be included in a special archive
+# linked against when the shared library will be used.
+static-only-routines = atexit
+
 distribute	:= exit.h grouping.h abort-instr.h isomac.c tst-fmtmsg.sh
 test-srcs	:= tst-fmtmsg
 tests		:= tst-strtol tst-strtod testmb testrand testsort testdiv \
@@ -81,6 +86,10 @@ CFLAGS-strfmon.c = -D_IO_MTSAFE_IO
 CFLAGS-strfmon_l.c = -D_IO_MTSAFE_IO
 endif
 
+ifeq (yes,$(have-protected))
+CFLAGS-atexit.c = -DHAVE_DOT_HIDDEN
+endif
+
 include ../Rules
 
 
@@ -141,7 +150,7 @@ test-canon-ARGS = --test-dir=${common-objpfx}stdlib
 tst-strtod-ENV = LOCPATH=$(common-objpfx)localedata
 
 # Run a test on the header files we use.
-tests: $(objpfx)isomac.out 
+tests: $(objpfx)isomac.out
 
 ifeq (no,$(cross-compiling))
 tests: $(objpfx)tst-fmtmsg.out
diff --git a/stdlib/Versions b/stdlib/Versions
index 034125a..c13ef27 100644
--- a/stdlib/Versions
+++ b/stdlib/Versions
@@ -94,4 +94,8 @@ libc {
     # used by new G++ ABI
     __cxa_atexit; __cxa_finalize;
   }
+  GLIBC_2.2.3 {
+    # Used by atexit in libc_nonshared.
+    __new_exitfn;
+  }
 }
diff --git a/stdlib/atexit.c b/stdlib/atexit.c
index e9648d6..19a1575 100644
--- a/stdlib/atexit.c
+++ b/stdlib/atexit.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1996, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1996, 1999, 2001 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
@@ -16,75 +16,24 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <bits/libc-lock.h>
 #include <stdlib.h>
 #include "exit.h"
 
 
+/* This is defined by newer gcc version unique for each module.  */
+extern void *__dso_handle __attribute__ ((__weak__));
+
+
 /* Register FUNC to be executed by `exit'.  */
 int
 atexit (void (*func) (void))
 {
-  struct exit_function *new = __new_exitfn ();
-
-  if (new == NULL)
-    return -1;
-
-  new->flavor = ef_at;
-  new->func.at = func;
-  return 0;
+  return __cxa_atexit ((void (*) (void *)) func, NULL,
+		       &__dso_handle == NULL ? NULL : __dso_handle);
 }
 
-
-/* We change global data, so we need locking.  */
-__libc_lock_define_initialized (static, lock)
-
-
-static struct exit_function_list initial;
-struct exit_function_list *__exit_funcs = &initial;
-
-struct exit_function *
-__new_exitfn (void)
-{
-  struct exit_function_list *l;
-  size_t i = 0;
-
-  __libc_lock_lock (lock);
-
-  for (l = __exit_funcs; l != NULL; l = l->next)
-    {
-      for (i = 0; i < l->idx; ++i)
-	if (l->fns[i].flavor == ef_free)
-	  break;
-      if (i < l->idx)
-	break;
-
-      if (l->idx < sizeof (l->fns) / sizeof (l->fns[0]))
-	{
-	  i = l->idx++;
-	  break;
-	}
-    }
-
-  if (l == NULL)
-    {
-      l = (struct exit_function_list *)
-	malloc (sizeof (struct exit_function_list));
-      if (l != NULL)
-	{
-	  l->next = __exit_funcs;
-	  __exit_funcs = l;
-
-	  l->idx = 1;
-      	  i = 0;
-	}
-    }
-
-  /* Mark entry as used, but we don't know the flavor now.  */
-  if (l != NULL)
-    l->fns[i].flavor = ef_us;
-
-  __libc_lock_unlock (lock);
-
-  return l == NULL ? NULL : &l->fns[i];
-}
+/* Hide the symbol so that no definition but the one locally in the
+   executable or DSO is used.  */
+#ifdef HAVE_DOT_HIDDEN
+asm (".hidden\tatexit");
+#endif
diff --git a/stdlib/cxa_atexit.c b/stdlib/cxa_atexit.c
index e07d0ed..f602b7a 100644
--- a/stdlib/cxa_atexit.c
+++ b/stdlib/cxa_atexit.c
@@ -16,6 +16,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <bits/libc-lock.h>
 #include <stdlib.h>
 #include "exit.h"
 
@@ -36,3 +37,57 @@ __cxa_atexit (void (*func) (void *), void *arg, void *d)
   new->func.cxa.dso_handle = d;
   return 0;
 }
+
+
+/* We change global data, so we need locking.  */
+__libc_lock_define_initialized (static, lock)
+
+
+static struct exit_function_list initial;
+struct exit_function_list *__exit_funcs = &initial;
+
+struct exit_function *
+__new_exitfn (void)
+{
+  struct exit_function_list *l;
+  size_t i = 0;
+
+  __libc_lock_lock (lock);
+
+  for (l = __exit_funcs; l != NULL; l = l->next)
+    {
+      for (i = 0; i < l->idx; ++i)
+	if (l->fns[i].flavor == ef_free)
+	  break;
+      if (i < l->idx)
+	break;
+
+      if (l->idx < sizeof (l->fns) / sizeof (l->fns[0]))
+	{
+	  i = l->idx++;
+	  break;
+	}
+    }
+
+  if (l == NULL)
+    {
+      l = (struct exit_function_list *)
+	malloc (sizeof (struct exit_function_list));
+      if (l != NULL)
+	{
+	  l->next = __exit_funcs;
+	  __exit_funcs = l;
+
+	  l->idx = 1;
+      	  i = 0;
+	}
+    }
+
+  /* Mark entry as used, but we don't know the flavor now.  */
+  if (l != NULL)
+    l->fns[i].flavor = ef_us;
+
+  __libc_lock_unlock (lock);
+
+  return l == NULL ? NULL : &l->fns[i];
+}
diff --git a/stdlib/old_atexit.c b/stdlib/old_atexit.c
new file mode 100644
index 0000000..45f330b
--- /dev/null
+++ b/stdlib/old_atexit.c
@@ -0,0 +1,8 @@
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2_2)
+# define atexit __dyn_atexit
+# include "atexit.c"
+# undef atexit
+compat_symbol (libc, __dyn_atexit, atexit, GLIBC_2_0);
+#endif