Fix the cast used to prevent compile time warning about an always false test.

[deliverable/binutils-gdb.git] / gdb / sentinel-frame.c

diff --git a/gdb/sentinel-frame.c b/gdb/sentinel-frame.c
index e6000cc136c95c9e69985332cf574570b21d97ef..1d601ca27b2116edadcc0103adc1411ef502d339 100644 (file)
--- a/gdb/sentinel-frame.c
+++ b/gdb/sentinel-frame.c
@@ -1,8 +1,6 @@
 /* Code dealing with register stack frames, for GDB, the GNU debugger.
 
-   Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
-   1996, 1997, 1998, 1999, 2000, 2001, 2002, 2007, 2008, 2009, 2010, 2011
-   Free Software Foundation, Inc.
+   Copyright (C) 1986-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -48,23 +46,12 @@ sentinel_frame_prev_register (struct frame_info *this_frame,
                              void **this_prologue_cache,
                              int regnum)
 {
-  struct gdbarch *gdbarch = get_frame_arch (this_frame);
-  struct frame_unwind_cache *cache = *this_prologue_cache;
+  struct frame_unwind_cache *cache
+    = (struct frame_unwind_cache *) *this_prologue_cache;
   struct value *value;
 
-  /* Return the actual value.  */
-  value = allocate_value (register_type (gdbarch, regnum));
-  VALUE_LVAL (value) = lval_register;
-  VALUE_REGNUM (value) = regnum;
-  VALUE_FRAME_ID (value) = get_frame_id (this_frame);
-
-  /* Use the regcache_cooked_read() method so that it, on the fly,
-     constructs either a raw or pseudo register from the raw
-     register cache.  */
-  if (regcache_cooked_read (cache->regcache,
-                           regnum,
-                           value_contents_raw (value)) == REG_UNAVAILABLE)
-    mark_value_bytes_unavailable (value, 0, register_size (gdbarch, regnum));
+  value = cache->regcache->cooked_read_value (regnum);
+  VALUE_NEXT_FRAME_ID (value) = sentinel_frame_id;
 
   return value;
 }
@@ -84,14 +71,16 @@ static struct gdbarch *
 sentinel_frame_prev_arch (struct frame_info *this_frame,
                          void **this_prologue_cache)
 {
-  struct frame_unwind_cache *cache = *this_prologue_cache;
+  struct frame_unwind_cache *cache
+    = (struct frame_unwind_cache *) *this_prologue_cache;
 
-  return get_regcache_arch (cache->regcache);
+  return cache->regcache->arch ();
 }
 
 const struct frame_unwind sentinel_frame_unwind =
 {
   SENTINEL_FRAME,
+  default_frame_unwind_stop_reason,
   sentinel_frame_this_id,
   sentinel_frame_prev_register,
   NULL,