/* Code dealing with register stack frames, for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
- Foundation, Inc.
+ Copyright (C) 1986-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
{
struct frame_unwind_cache *cache =
FRAME_OBSTACK_ZALLOC (struct frame_unwind_cache);
+
cache->regcache = regcache;
return cache;
}
/* Here the register value is taken direct from the register cache. */
-void
-sentinel_frame_register_unwind (struct frame_info *frame,
- void **unwind_cache,
- int regnum, int *optimized,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnum, void *bufferp)
+static struct value *
+sentinel_frame_prev_register (struct frame_info *this_frame,
+ void **this_prologue_cache,
+ int regnum)
{
- struct frame_unwind_cache *cache = *unwind_cache;
- /* Describe the register's location. A reg-frame maps all registers
- onto the corresponding hardware register. */
- *optimized = 0;
- *lvalp = lval_register;
- *addrp = REGISTER_BYTE (regnum);
- *realnum = regnum;
-
- /* If needed, find and return the value of the register. */
- if (bufferp != NULL)
- {
- /* Return the actual value. */
- /* Use the regcache_cooked_read() method so that it, on the fly,
- constructs either a raw or pseudo register from the raw
- register cache. */
- regcache_cooked_read (cache->regcache, regnum, bufferp);
- }
+ struct frame_unwind_cache *cache
+ = (struct frame_unwind_cache *) *this_prologue_cache;
+ struct value *value;
+
+ value = cache->regcache->cooked_read_value (regnum);
+ VALUE_NEXT_FRAME_ID (value) = sentinel_frame_id;
+
+ return value;
}
-void
-sentinel_frame_id_unwind (struct frame_info *frame,
- void **cache,
- struct frame_id *id)
+static void
+sentinel_frame_this_id (struct frame_info *this_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
{
- /* FIXME: cagney/2003-01-08: This should be using a per-architecture
- method that doesn't suffer from DECR_PC_AFTER_BREAK problems.
- Such a method would take unwind_cache, regcache and stop reason
- parameters. */
- id->base = read_fp ();
- id->pc = read_pc ();
+ /* The sentinel frame is used as a starting point for creating the
+ previous (inner most) frame. That frame's THIS_ID method will be
+ called to determine the inner most frame's ID. Not this one. */
+ internal_error (__FILE__, __LINE__, _("sentinel_frame_this_id called"));
}
-const struct frame_unwind sentinel_frame_unwinder =
+static struct gdbarch *
+sentinel_frame_prev_arch (struct frame_info *this_frame,
+ void **this_prologue_cache)
{
- sentinel_frame_id_unwind,
- sentinel_frame_register_unwind
-};
+ struct frame_unwind_cache *cache
+ = (struct frame_unwind_cache *) *this_prologue_cache;
-const struct frame_unwind *const sentinel_frame_unwind = &sentinel_frame_unwinder;
+ 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,
+ NULL,
+ NULL,
+ sentinel_frame_prev_arch,
+};