[PATCH 19/26] gdbserver: fix the declared type of register_status in regcache

[Tankut Baris Aktemur via Gdb-patches <gdb-patches@sourceware.org>]

The register_status field of regcache is declared as `unsigned char *`.
This is incorrect, because `enum register_status` from
gdbsupport/common-regcache.h is based on signed char and
REG_UNAVAILABLE is defined as -1.  Fix the declared type.

The get/set methods already use the correct type, but we update cast
operations in two places.
---
 gdbserver/regcache.cc | 4 ++--
 gdbserver/regcache.h  | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/gdbserver/regcache.cc b/gdbserver/regcache.cc
index 0e21c1aa7d1..09ea58bdbd6 100644
--- a/gdbserver/regcache.cc
+++ b/gdbserver/regcache.cc
@@ -147,7 +147,7 @@ regcache::initialize (const target_desc *tdesc,
 	= (unsigned char *) xcalloc (1, tdesc->registers_size);
       this->registers_owned = true;
       this->register_status
-	= (unsigned char *) xmalloc (tdesc->reg_defs.size ());
+	= (enum register_status *) xmalloc (tdesc->reg_defs.size ());
       memset ((void *) this->register_status, REG_UNAVAILABLE,
 	      tdesc->reg_defs.size ());
 #else
@@ -490,7 +490,7 @@ regcache::get_register_status (int regnum) const
 #ifndef IN_PROCESS_AGENT
   gdb_assert (regnum >= 0 && regnum < tdesc->reg_defs.size ());
   if (register_status != nullptr)
-    return (enum register_status) (register_status[regnum]);
+    return register_status[regnum];
   else
     return REG_VALID;
 #else
diff --git a/gdbserver/regcache.h b/gdbserver/regcache.h
index 3fcd4643a42..ad71a9acaec 100644
--- a/gdbserver/regcache.h
+++ b/gdbserver/regcache.h
@@ -46,8 +46,8 @@ struct regcache : public reg_buffer_common
   bool registers_owned = false;
   unsigned char *registers = nullptr;
 #ifndef IN_PROCESS_AGENT
-  /* One of REG_UNAVAILABLE or REG_VALID.  */
-  unsigned char *register_status = nullptr;
+  /* See gdbsupport/common-regcache.h.  */
+  enum register_status *register_status = nullptr;
 
   /* Constructors.  */
   regcache () = default;
-- 
2.25.1

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