initial commit

1 files changed, 169 insertions, 0 deletions

diff --git a/gcc/config/m32r/initfini.c b/gcc/config/m32r/initfini.c
new file mode 100755
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+++ b/gcc/config/m32r/initfini.c
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+/* .init/.fini section handling + C++ global constructor/destructor handling.
+   This file is based on crtstuff.c, sol2-crti.asm, sol2-crtn.asm.
+
+Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* As a special exception, if you link this file with files
+   compiled with GCC to produce an executable, this does not cause
+   the resulting executable to be covered by the GNU General Public License.
+   This exception does not however invalidate any other reasons why
+   the executable file might be covered by the GNU General Public License.  */
+
+/*  Declare a pointer to void function type.  */
+typedef void (*func_ptr) (void);
+
+#ifdef CRT_INIT
+
+/* NOTE:  In order to be able to support SVR4 shared libraries, we arrange
+   to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__,
+   __DTOR_END__ } per root executable and also one set of these symbols
+   per shared library.  So in any given whole process image, we may have
+   multiple definitions of each of these symbols.  In order to prevent
+   these definitions from conflicting with one another, and in order to
+   ensure that the proper lists are used for the initialization/finalization
+   of each individual shared library (respectively), we give these symbols
+   only internal (i.e. `static') linkage, and we also make it a point to
+   refer to only the __CTOR_END__ symbol in crtfini.o and the __DTOR_LIST__
+   symbol in crtinit.o, where they are defined.  */
+
+static func_ptr __CTOR_LIST__[1]
+  __attribute__ ((section (".ctors")))
+     = { (func_ptr) (-1) };
+
+static func_ptr __DTOR_LIST__[1]
+  __attribute__ ((section (".dtors")))
+     = { (func_ptr) (-1) };
+
+/* Run all the global destructors on exit from the program.  */
+ 
+/* Some systems place the number of pointers in the first word of the
+   table.  On SVR4 however, that word is -1.  In all cases, the table is
+   null-terminated.  On SVR4, we start from the beginning of the list and
+   invoke each per-compilation-unit destructor routine in order
+   until we find that null.
+
+   Note that this function MUST be static.  There will be one of these
+   functions in each root executable and one in each shared library, but
+   although they all have the same code, each one is unique in that it
+   refers to one particular associated `__DTOR_LIST__' which belongs to the
+   same particular root executable or shared library file.  */
+
+static void __do_global_dtors ()
+asm ("__do_global_dtors") __attribute__ ((section (".text")));
+
+static void
+__do_global_dtors ()
+{
+  func_ptr *p;
+
+  for (p = __DTOR_LIST__ + 1; *p; p++)
+    (*p) ();
+}
+
+/* .init section start.
+   This must appear at the start of the .init section.  */
+
+asm ("
+	.section .init,\"ax\",@progbits
+	.balign 4
+	.global __init
+__init:
+	push fp
+	push lr
+	mv fp,sp
+	ld24 r0,#__fini
+	bl atexit
+	.fillinsn
+");
+
+/* .fini section start.
+   This must appear at the start of the .init section.  */
+
+asm ("
+	.section .fini,\"ax\",@progbits
+	.balign 4
+	.global __fini
+__fini:
+	push fp
+	push lr
+	mv fp,sp
+	bl __do_global_dtors
+	.fillinsn
+");
+
+#endif /* CRT_INIT */
+
+#ifdef CRT_FINI
+
+/* Put a word containing zero at the end of each of our two lists of function
+   addresses.  Note that the words defined here go into the .ctors and .dtors
+   sections of the crtend.o file, and since that file is always linked in
+   last, these words naturally end up at the very ends of the two lists
+   contained in these two sections.  */
+
+static func_ptr __CTOR_END__[1]
+  __attribute__ ((section (".ctors")))
+     = { (func_ptr) 0 };
+
+static func_ptr __DTOR_END__[1]
+  __attribute__ ((section (".dtors")))
+     = { (func_ptr) 0 };
+
+/* Run all global constructors for the program.
+   Note that they are run in reverse order.  */
+
+static void __do_global_ctors ()
+asm ("__do_global_ctors") __attribute__ ((section (".text")));
+
+static void
+__do_global_ctors ()
+{
+  func_ptr *p;
+
+  for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
+    (*p) ();
+}
+
+/* .init section end.
+   This must live at the end of the .init section.  */
+
+asm ("
+	.section .init,\"ax\",@progbits
+	bl __do_global_ctors
+	mv sp,fp
+	pop lr
+	pop fp
+	jmp lr
+	.fillinsn
+");
+
+/* .fini section end.
+   This must live at the end of the .fini section.  */
+
+asm ("
+	.section .fini,\"ax\",@progbits
+	mv sp,fp
+	pop lr
+	pop fp
+	jmp lr
+	.fillinsn
+");
+
+#endif /* CRT_FINI */