Construct readonly regcache without address space

The address space is useless to readonly regcache, so this patch removes
the parameter to construct readonly regcache.

address_space was added in regcache by 6c95b8d, but for read-write
regcache.  regcache::aspace is used for various breakpoint/watchpoint
checking, and these regcache are not read-only regcache.

gdb:

2017-11-02  Yao Qi  <yao.qi@linaro.org>

	* frame.c (do_frame_register_read): Remove aspace.
	* jit.c (jit_frame_sniffer): Likwise.
	* ppc-linux-tdep.c (ppu2spu_sniffer): Likewise.
	* regcache.c (regcache::regcache): Pass nullptr.
	(regcache_print): Caller updated.
	* regcache.h (regcache::regcache): Remove one constructor
	parameter aspace.

1 files changed, 1 insertions, 3 deletions

diff --git a/gdb/jit.c b/gdb/jit.c
index b70f87c..7538684 100644
--- a/gdb/jit.c
+++ b/gdb/jit.c
@@ -1199,13 +1199,11 @@ jit_frame_sniffer (const struct frame_unwind *self,
 
   gdb_assert (!*cache);
 
-  const address_space *aspace = get_frame_address_space (this_frame);
-
   gdbarch = get_frame_arch (this_frame);
 
   *cache = XCNEW (struct jit_unwind_private);
   priv_data = (struct jit_unwind_private *) *cache;
-  priv_data->regcache = new regcache (gdbarch, aspace);
+  priv_data->regcache = new regcache (gdbarch);
   priv_data->this_frame = this_frame;
 
   callbacks.priv_data = priv_data;