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diff --git a/gcc/config/mips/sdb.h b/gcc/config/mips/sdb.h
new file mode 100644
index 00000000..27a42df7
--- /dev/null
+++ b/gcc/config/mips/sdb.h
@@ -0,0 +1,87 @@
+/* Generate SDB debugging info.
+   Copyright (C) 2003, 2004, 2007 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.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+/* Note that no configuration uses sdb as its preferred format.  */
+
+#define SDB_DEBUGGING_INFO 1
+
+/* Forward references to tags are allowed.  */
+#define SDB_ALLOW_FORWARD_REFERENCES
+
+/* Unknown tags are also allowed.  */
+#define SDB_ALLOW_UNKNOWN_REFERENCES
+
+/* Block start/end next label #.  */
+extern int sdb_label_count;
+
+/* Starting line of current function.  */
+extern int sdb_begin_function_line;
+
+/* For block start and end, we create labels, so that
+   later we can figure out where the correct offset is.
+   The normal .ent/.end serve well enough for functions,
+   so those are just commented out.  */
+
+#define PUT_SDB_BLOCK_START(LINE)			\
+do {							\
+  fprintf (asm_out_file,				\
+	   "%sLb%d:\n\t.begin\t%sLb%d\t%d\n",		\
+	   LOCAL_LABEL_PREFIX,				\
+	   sdb_label_count,				\
+	   LOCAL_LABEL_PREFIX,				\
+	   sdb_label_count,				\
+	   (LINE));					\
+  sdb_label_count++;					\
+} while (0)
+
+#define PUT_SDB_BLOCK_END(LINE)				\
+do {							\
+  fprintf (asm_out_file,				\
+	   "%sLe%d:\n\t.bend\t%sLe%d\t%d\n",		\
+	   LOCAL_LABEL_PREFIX,				\
+	   sdb_label_count,				\
+	   LOCAL_LABEL_PREFIX,				\
+	   sdb_label_count,				\
+	   (LINE));					\
+  sdb_label_count++;					\
+} while (0)
+
+#define PUT_SDB_FUNCTION_START(LINE)
+
+#define PUT_SDB_FUNCTION_END(LINE)			\
+do {							\
+  SDB_OUTPUT_SOURCE_LINE (asm_out_file, LINE + sdb_begin_function_line); \
+} while (0)
+
+#define PUT_SDB_EPILOGUE_END(NAME)
+
+/* We need to use .esize and .etype instead of .size and .type to
+   avoid conflicting with ELF directives.  */
+#undef PUT_SDB_SIZE
+#define PUT_SDB_SIZE(a)					\
+do {							\
+  fprintf (asm_out_file, "\t.esize\t" HOST_WIDE_INT_PRINT_DEC ";", \
+ 	   (HOST_WIDE_INT) (a));			\
+} while (0)
+
+#undef PUT_SDB_TYPE
+#define PUT_SDB_TYPE(a)					\
+do {							\
+  fprintf (asm_out_file, "\t.etype\t0x%x;", (a));	\
+} while (0)