initial import

1 files changed, 85 insertions, 0 deletions

diff --git a/csu/initfini.c b/csu/initfini.c
new file mode 100644
index 0000000000..ea16e62ffe
--- /dev/null
+++ b/csu/initfini.c
@@ -0,0 +1,85 @@
+/* Special .init and .fini section support.
+Copyright (C) 1995 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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* This file is compiled into assembly code which is then surrounded by the
+   lines `cat > crtcommon.tmp <<\EOF_common' and `EOF_common' and thus
+   becomes a shell script which creates three files of assembly code.
+
+   * The first file is crti.s-new; this puts a function prologue at the
+   beginning of the .init and .fini sections and defines global symbols for
+   those addresses, so they can be called as functions.
+
+   * The second file is crtn.s-new; this puts the corresponding function
+   epilogues in the .init and .fini sections.
+
+   * The third file is crtcommon.tmp, which is whatever miscellaneous cruft
+   the compiler generated at the end; it should be appended to both crti.s-new
+   and crtn.s-new.  */
+
+#include <stdlib.h>
+
+/* These declarations make the functions go in the right sections when
+   we define them below.  GCC syntax does not allow the attribute
+   specifications to be in the function definitions themselves.  */
+void _init (void) __attribute__ ((section (".init")));
+void _fini (void) __attribute__ ((section (".fini")));
+
+/* End the here document containing the initial common code.
+   Then move the output file crtcommon.tmp to crti.s-new and crtn.s-new.  */
+asm ("\nEOF_common\n\
+mv -f crtcommon.tmp crti.s-new\n\
+cp -f crti.s-new crtn.s-new");
+
+/* Append the .init prologue to crti.s-new.  */
+asm ("cat >> crti.s-new <<\\EOF.crti.init");
+void
+_init (void)
+{
+  /* End the here document containing the .init prologue code.
+     Then fetch the .section directive just written and append that
+     to crtn.s-new, followed by the function epilogue.  */
+  asm ("\nEOF.crti.init
+\n\
+	fgrep .init crti.s-new >>crtn.s-new\n\
+	cat >> crtn.s-new <<\\EOF.crtn.init");
+}
+
+/* End the here document containing the .init epilogue code.
+   Then append the .fini prologue to crti.s-new.  */
+asm ("\nEOF.crtn.init\
+\n\
+cat >> crti.s-new <<\\EOF.crti.fini");
+
+void
+_fini (void)
+{
+  /* End the here document containing the .fini prologue code.
+     Then fetch the .section directive just written and append that
+     to crtn.s-new, followed by the function epilogue.  */
+  asm ("\nEOF.crti.fini\
+\n\
+	fgrep .fini crti.s-new >>crtn.s-new\n\
+	cat >> crtn.s-new <<\\EOF.crtn.fini");
+}
+
+/* End the here document containing the .fini epilogue code.
+   Finally, put the remainder of the generated assembly into crtcommon.tmp.  */
+asm ("\nEOF.crtn.fini\
+\n\
+cat > crtcommon.tmp <<\\EOF_common");