obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 50 insertions, 0 deletions

diff --git a/gcc/config/xtensa/unwind-dw2-xtensa.h b/gcc/config/xtensa/unwind-dw2-xtensa.h
new file mode 100644
index 000000000..d13b3264c
--- /dev/null
+++ b/gcc/config/xtensa/unwind-dw2-xtensa.h
@@ -0,0 +1,50 @@
+/* DWARF2 frame unwind data structure for Xtensa.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008,
+   2009  Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC 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 3, or (at your option)
+   any later version.
+
+   GCC 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* A target can override (perhaps for backward compatibility) how
+   many dwarf2 columns are unwound.  */
+#ifndef DWARF_FRAME_REGISTERS
+#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
+#endif
+
+/* Xtensa's variable-size register window save areas can be unwound without
+   any unwind info.  This is a stripped down version of the standard DWARF
+   _Unwind_FrameState.  */
+typedef struct
+{
+  /* The information we care about from the CIE/FDE.  */
+  _Unwind_Personality_Fn personality;
+  _Unwind_Word retaddr_column;
+  unsigned char fde_encoding;
+  unsigned char lsda_encoding;
+  unsigned char saw_z;
+  unsigned char signal_frame;
+  void *eh_ptr;
+
+  /* Saved registers for a signal frame.  */
+  _Unwind_Word *signal_regs;
+  _Unwind_Word signal_ra;
+} _Unwind_FrameState;
+