Add symbolic backtraces and expose skiboot map to Linux

We use a double link technique, doing a first pass with a .o containing
a dummy symbol map, then re-linking with a new .o

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/asm/real_map.S b/asm/real_map.S
new file mode 100644
index 00000000..fbbf2ccf
--- /dev/null
+++ b/asm/real_map.S
@@ -0,0 +1,20 @@
+/* Copyright 2013-2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * 	http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+	.section ".sym_map","a"
+	.incbin "skiboot.tmp.map"
+