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/tmp/gdb-13.1/gdb/sentinel-frame.c
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1/* Code dealing with register stack frames, for GDB, the GNU debugger.
2
3 Copyright (C) 1986-2023 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20
21#include "defs.h"
22#include "regcache.h"
23#include "sentinel-frame.h"
24#include "inferior.h"
25#include "frame-unwind.h"
26
28{
30};
31
32void *
34{
35 struct frame_unwind_cache *cache =
37
38 cache->regcache = regcache;
39 return cache;
40}
41
42/* Here the register value is taken direct from the register cache. */
43
44static struct value *
46 void **this_prologue_cache,
47 int regnum)
48{
49 struct frame_unwind_cache *cache
50 = (struct frame_unwind_cache *) *this_prologue_cache;
51 struct value *value;
52
55
56 return value;
57}
58
59static void
61 void **this_prologue_cache,
62 struct frame_id *this_id)
63{
64 /* The sentinel frame is used as a starting point for creating the
65 previous (inner most) frame. That frame's THIS_ID method will be
66 called to determine the inner most frame's ID. Not this one. */
67 internal_error (_("sentinel_frame_this_id called"));
68}
69
70static struct gdbarch *
72 void **this_prologue_cache)
73{
74 struct frame_unwind_cache *cache
75 = (struct frame_unwind_cache *) *this_prologue_cache;
76
77 return cache->regcache->arch ();
78}
79
81{
82 "sentinel",
87 NULL,
88 NULL,
89 NULL,
91};
int regnum
Definition: aarch64-tdep.c:68
struct value * cooked_read_value(int regnum)
Definition: regcache.c:735
gdbarch * arch() const
Definition: regcache.c:230
const struct frame_id sentinel_frame_id
Definition: frame.c:665
enum unwind_stop_reason default_frame_unwind_stop_reason(frame_info_ptr this_frame, void **this_cache)
Definition: frame-unwind.c:227
@ SENTINEL_FRAME
Definition: frame.h:195
#define FRAME_OBSTACK_ZALLOC(TYPE)
Definition: frame.h:608
const struct frame_unwind sentinel_frame_unwind
static struct value * sentinel_frame_prev_register(frame_info_ptr this_frame, void **this_prologue_cache, int regnum)
static void sentinel_frame_this_id(frame_info_ptr this_frame, void **this_prologue_cache, struct frame_id *this_id)
static struct gdbarch * sentinel_frame_prev_arch(frame_info_ptr this_frame, void **this_prologue_cache)
void * sentinel_frame_cache(struct regcache *regcache)
struct regcache * regcache
Definition: value.c:181
#define VALUE_NEXT_FRAME_ID(val)
Definition: value.h:465