From 208ea73d38c9c16cf983b6419f58050dbadcb6a9 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Sun, 7 Jun 2015 22:43:49 +0300
Subject: [PATCH 2/2] xtensa: make sure ar_base is initialized

ar_base is uninitialized for cores w/o windowed registers as their
regmap doesn't have register 0x0100.
Check that ar_base is initialized and if not initialize it with a0_base.

gdb/
	* xtensa-tdep.c (xtensa_derive_tdep): Make sure ar_base is
	initialized.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 gdb/xtensa-tdep.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/gdb/xtensa-tdep.c
+++ b/gdb/xtensa-tdep.c
@@ -3129,6 +3129,9 @@
   if (tdep->num_regs == 0)
     tdep->num_regs = tdep->num_nopriv_regs;
 
+  if (tdep->ar_base == -1)
+    tdep->ar_base = tdep->a0_base;
+
   /* Number of pseudo registers.  */
   tdep->num_pseudo_regs = n - tdep->num_regs;
 
