Share regcache function regcache_raw_read_unsigned

This patch is in preparation for software single step support on ARM in
GDBServer. It adds a new shared function regcache_raw_read_unsigned and
regcache_raw_get_unsigned so that GDB and GDBServer can use the same call
to fetch a raw register into an integer.

No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }

gdb/ChangeLog:

	* Makefile.in (SFILES): Append common/common-regcache.c.
	(COMMON_OBS): Append common/common-regcache.o.
	(common-regcache.o): New rule.
	* common/common-regcache.h (register_status) New enum.
	(regcache_raw_read_unsigned): New declaration.
	* common/common-regcache.c: New file.
	* regcache.h (enum register_status): Move to common-regcache.h.
	(regcache_raw_read_unsigned): Likewise.
	(regcache_raw_get_unsigned): Likewise.

gdb/gdbserver/ChangeLog:

	* Makefile.in (SFILES): Append common/common-regcache.c.
	(OBS): Append common-regcache.o.
	(common-regcache.o): New rule.
	* regcache.c (init_register_cache): Initialize cache to
	REG_UNAVAILABLE.
	(regcache_raw_read_unsigned): New function.
	* regcache.h (REG_UNAVAILABLE, REG_VALID): Replaced by shared
	register_status enum.

1 files changed, 0 insertions, 15 deletions

diff --git a/gdb/regcache.c b/gdb/regcache.c
index 7fb9d18..5ee31fb 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -715,21 +715,6 @@ regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
   return status;
 }
 
-/* Return the register's value or throw if it's not available.  */
-
-ULONGEST
-regcache_raw_get_unsigned (struct regcache *regcache, int regnum)
-{
-  ULONGEST value;
-  enum register_status status;
-
-  status = regcache_raw_read_unsigned (regcache, regnum, &value);
-  if (status == REG_UNAVAILABLE)
-    throw_error (NOT_AVAILABLE_ERROR,
-		 _("Register %d is not available"), regnum);
-  return value;
-}
-
 void
 regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val)
 {