2006-07-21  Frederic Riss  <frederic.riss@st.com>

	* regcache.c (struct regcache): Make register_valid_p a signed char 
	array.


Index: regcache.c
===================================================================
RCS file: /cvs/src/src/gdb/regcache.c,v
retrieving revision 1.138
diff -u -p -p -r1.138 regcache.c
--- regcache.c	17 Dec 2005 22:34:01 -0000	1.138
+++ regcache.c	21 Jul 2006 19:59:38 -0000
@@ -186,7 +186,11 @@ struct regcache
      full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write
      register cache can only hold [0 .. NUM_REGS).  */
   gdb_byte *registers;
-  gdb_byte *register_valid_p;
+  /* Register cache status:
+     register_valid_p[REG] == 0 if REG value is not in the cache
+                            > 0 if REG value is in the cache
+                            < 0 if REG value is permanently unavailable */
+  signed char *register_valid_p;
   /* Is this a read-only cache?  A read-only cache is used for saving
      the target's register state (e.g, across an inferior function
      call or just before forcing a function return).  A read-only