From 2fbc59b753af80aa91f3bf55759671f5c1f3dc5a Mon Sep 17 00:00:00 2001
From: Luis Machado <luis.machado@arm.com>
Date: Thu, 1 Sep 2022 11:36:25 +0100
Subject: [PATCH] Add CPSR C64 bit (26)

Teach Morello GDB about bit 26 (C64), which shows if we have C64
execution state enabled or disabled.
---
 gdb/features/aarch64-core.c   | 1 +
 gdb/features/aarch64-core.xml | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/gdb/features/aarch64-core.c b/gdb/features/aarch64-core.c
index bb707173be6..b95ebd581e8 100644
--- a/gdb/features/aarch64-core.c
+++ b/gdb/features/aarch64-core.c
@@ -26,6 +26,7 @@ create_feature_aarch64_core (struct target_desc *result, long regnum)
   tdesc_add_flag (type_with_fields, 23, "UAO");
   tdesc_add_flag (type_with_fields, 24, "DIT");
   tdesc_add_flag (type_with_fields, 25, "TCO");
+  tdesc_add_flag (type_with_fields, 26, "C64");
   tdesc_add_flag (type_with_fields, 28, "V");
   tdesc_add_flag (type_with_fields, 29, "C");
   tdesc_add_flag (type_with_fields, 30, "Z");
diff --git a/gdb/features/aarch64-core.xml b/gdb/features/aarch64-core.xml
index ab54a37b113..247167b1fc5 100644
--- a/gdb/features/aarch64-core.xml
+++ b/gdb/features/aarch64-core.xml
@@ -79,7 +79,8 @@
     <field name="DIT" start="24" end="24"/>
     <!-- ARMv8.5-A: Tag Check Override.  -->
     <field name="TCO" start="25" end="25"/>
-
+    <!-- Morello C64 bit, indicating C64 execution state.  -->
+    <field name="C64" start="26" end="26"/>
     <!-- Overflow Condition flag.  -->
     <field name="V" start="28" end="28"/>
     <!-- Carry Condition flag.  -->
-- 
2.47.2