From 93c65d438497842a42fe4f6a8af272d20a143025 Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@hack.frob.com>
Date: Mon, 1 Oct 2012 12:55:34 -0700
Subject: Clean up init-first.c files.

---
 csu/init-first.c | 89 ++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 71 insertions(+), 18 deletions(-)

(limited to 'csu')

diff --git a/csu/init-first.c b/csu/init-first.c
index 050959dcb2..0cfabbce28 100644
--- a/csu/init-first.c
+++ b/csu/init-first.c
@@ -1,4 +1,4 @@
-/* Initialization code run first thing by the ELF startup code.  Stub version.
+/* Initialization code run first thing by the ELF startup code.  Common version
    Copyright (C) 1995-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -17,40 +17,76 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
 #include <unistd.h>
+#include <sysdep.h>
+#include <fpu_control.h>
+#include <sys/param.h>
 #include <sys/types.h>
+#include <libc-internal.h>
+
+#include <ldsodefs.h>
 
 /* Set nonzero if we have to be prepared for more then one libc being
    used in the process.  Safe assumption if initializer never runs.  */
 int __libc_multiple_libcs attribute_hidden = 1;
 
-extern void __libc_init (int, char **, char **);
-#ifdef USE_NONOPTION_FLAGS
-extern void __getopt_clean_environment (char **);
-#endif
+/* Remember the command line argument and enviroment contents for
+   later calls of initializers for dynamic libraries.  */
+int __libc_argc attribute_hidden;
+char **__libc_argv attribute_hidden;
+
 
-#ifdef SHARED
 void
-__libc_init_first (void)
+__libc_init_first (int argc, char **argv, char **envp)
 {
+#ifdef SHARED
+  /* For DSOs we do not need __libc_init_first but instead _init.  */
 }
+
+void
+attribute_hidden
+_init (int argc, char **argv, char **envp)
+{
+#endif
+#ifdef USE_NONOPTION_FLAGS
+  extern void __getopt_clean_environment (char **);
 #endif
 
+  __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up;
+
+  /* Make sure we don't initialize twice.  */
+  if (!__libc_multiple_libcs)
+    {
+      /* Set the FPU control word to the proper default value if the
+	 kernel would use a different value.  (In a static program we
+	 don't have this information.)  */
 #ifdef SHARED
-/* NOTE!  The linker notices the magical name `_init' and sets the DT_INIT
-   pointer in the dynamic section based solely on that.  It is convention
-   for this function to be in the `.init' section, but the symbol name is
-   the only thing that really matters!!  */
-void _init
-#else
-void __libc_init_first
+      if (__fpu_control != GLRO(dl_fpu_control))
 #endif
-(int argc, char *arg0, ...)
-{
-  char **argv = &arg0, **envp = &argv[argc + 1];
+	__setfpucw (__fpu_control);
+    }
 
+  /* Save the command-line arguments.  */
+  __libc_argc = argc;
+  __libc_argv = argv;
   __environ = envp;
-  __libc_init (argc, argv, envp);
+
+#ifndef SHARED
+  __libc_init_secure ();
+
+  /* First the initialization which normally would be done by the
+     dynamic linker.  */
+  _dl_non_dynamic_init ();
+#endif
+
+#ifdef VDSO_SETUP
+  VDSO_SETUP ();
+#endif
+
+  __init_misc (argc, argv, envp);
 
 #ifdef USE_NONOPTION_FLAGS
   /* This is a hack to make the special getopt in GNU libc working.  */
@@ -59,4 +95,21 @@ void __libc_init_first
 
   /* Initialize ctype data.  */
   __ctype_init ();
+
+#if defined SHARED && !defined NO_CTORS_DTORS_SECTIONS
+  __libc_global_ctors ();
+#endif
+}
+
+/* This function is defined here so that if this file ever gets into
+   ld.so we will get a link error.  Having this file silently included
+   in ld.so causes disaster, because the _init definition above will
+   cause ld.so to gain an init function, which is not a cool thing. */
+
+extern void _dl_start (void) __attribute__ ((noreturn));
+
+void
+_dl_start (void)
+{
+  abort ();
 }
-- 
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